キノシタ ツグキ木下 嗣基教授Tsuguki KINOSHITA
■研究者基本情報
研究分野
経歴
■研究活動情報
論文
- Expression of candidate marker genes of sugar starvation is upregulated in growth-suppressed parthenocarpic cucumber fruit: Novel gene markers for sugar starvation in growth-suppressed cucumber fruit
Akio Tazuke; Tsuguki Kinoshita and Munehiko Asayama, Frontiers
Frontiers in Plant Science, 2023年08月18日, ［査読有り］ - Abandoned farmland detection using single-year satellite images in Japan
Yoshihiko Kobayashi; Tsuguki Kinoshita, 責任著者, SPIE
Journal of Applied Remote Sensing, 2023年03月10日, ［査読有り］ - 〔主要な業績〕A New Rough Set Classifier for Numerical Data Based on Reflexive and Antisymmetric Relations
Yoshie Ishii; Koki Iwao andTsuguki Kinoshita, ラスト(シニア)オーサー, The grade-added rough set (GRS) approach is an extension of the rough set theory proposed by Pawlak to deal with numerical data. However, the GRS has problems with overtraining, unclassified and unnatural results. In this study, we propose a new approach called the directional neighborhood rough set (DNRS) approach to solve the problems of the GRS. The information granules in the DNRS are based on reflexive and antisymmetric relations. Following these relations, new lower and upper approximations are defined. Based on these definitions, we developed a classifier with a three-step algorithm, including DN-lower approximation classification, DN-upper approximation classification, and exceptional processing. Three experiments were conducted using the University of California Irvine (UCI)’s machine learning dataset to demonstrate the effect of each step in the DNRS model, overcoming the problems of the GRS, and achieving more accurate classifiers. The results showed that when the number of dimensions is reduced and both the lower and upper approximation algorithms are used, the DNRS model is more efficient than when the number of dimensions is large. Additionally, it was shown that the DNRS solves the problems of the GRS and the DNRS model is as accurate as existing classifiers., MDPI
Machine Learning and Knowledge Extraction, 2022年11月18日, ［査読有り］ - Impacts of socio-economic and climate changes on water, food, bioenergy, land use, and ecosystems
Tokuta Yokohata; Tsuguki Kinoshita; Gen Sakurai; Shinichiro Fujimori; Yadu Pokhrel; Akihiko Ito; Yusuke Satoh; Etsushi Kato; Masashi Okada; Kaoru Tachiiri; Ken'ichi Matsumoto; Seita Emori; Kiyoshi Takahashi, Wiley
Earth and Space Science Open Archive, 2021年12月22日, ［査読有り］ - Global Land Cover Assessment Using Spatial Uniformity Validation Dataset
Yoshie Ishii; Koki Iwao; Tsuguki Kinoshita, ラスト(シニア)オーサー, The Degree Confluence Project (DCP) is a volunteer-based validation dataset that comprises useful information for global land cover map validation. However, there is a problem with using DCP points as validation data for the accuracy assessment of land cover maps. While resolutions of typical global land cover maps are several hundred meters to several kilometers, DCP points can only guarantee an area of several tens of meters that can be confirmed by ground photographs. So, the objective of this study is to create a land cover map validation dataset with added spatial uniformity information using satellite images and DCP points. For this, we devised a new method to semiautomatically guarantee the spatial uniformity of DCP validation data points at any resolution. This method can judge the validation data with guaranteed uniformity with a user’s accuracy of 0.954. Furthermore, we conducted the accuracy assessment for the existing global land cover maps by the DCP validation data with guaranteed spatial uniformity and found that the trends differed by class and region., MDPI
Remote Sensing, 2021年07月27日, ［査読有り］ - 大区画水田地域における景観から見たタヌキNyctereutes procyonoidesのロードキル発生特性
篠田優香、佐伯緑、竹内正彦、木下嗣基, ラスト(シニア)オーサー, 日本哺乳類学会
哺乳類科学, 2021年07月01日, ［査読有り］ - A New Land Cover Classification Method Using Grade-added Rough Sets
Y. Ishii; H. Bagan; K. Iwao; T. Kinoshita, ラスト(シニア)オーサー, IEEE
IEEE Geoscience and Remote Sensing Letters, 2021年01月, ［査読有り］ - A Comparative Analysis of Global Land Cover Change between MCD12 and CCI-LC
Yoshie Ishii; Koki Iwao; Tsuguki Kinoshita, ラスト(シニア)オーサー
Proceedings of the 41st Asian Conference on Remote Sensing, 2020年11月09日, ［査読有り］ - Improve temporal consistency of satellite constellation image time-series for farmland abandonment detection
Yoshihiko Kobayashi; Tsuguki Kinoshita, ラスト(シニア)オーサー
Proceedings of the 41st Asian Conference on Remote Sensing, 2020年11月09日, ［査読有り］ - MIROC-INTEG-LAND version 1: a global biogeochemical land surface model with human water management, crop growth, and land-use change
Tokuta Yokohata; Tsuguki Kinoshita; Gen Sakurai; Yadu Pokhrel; Akihiko Ito; Masashi Okada; Yusuke Satoh; Etsushi Kato; Tomoko Nitta; Shinichiro Fujimori; Farshid Felfelani; Yoshimitsu Masaki; Toshichika Iizumi; Motoki Nishimori; Naota Hanasaki; Kiyoshi Takahashi; Yoshiki Yamagata; Seita Emori, Abstract. Future changes in the climate system could have significant impacts on the
natural environment and human activities, which in turn affect changes in
the climate system. In the interaction between natural and human systems
under climate change conditions, land use is one of the elements that play
an essential role. On the one hand, future climate change will affect the
availability of water and food, which may impact land-use change. On the
other hand, human-induced land-use change can affect the climate system
through biogeophysical and biogeochemical effects. To investigate these
interrelationships, we developed MIROC-INTEG-LAND (MIROC INTEGrated LAND
surface model version 1), an integrated model that combines the land surface
component of global climate model MIROC (Model for Interdisciplinary
Research on Climate) with water resources, crop production, land ecosystem,
and land-use models. The most significant feature of MIROC-INTEG-LAND is
that the land surface model that describes the processes of the energy and
water balance, human water management, and crop growth incorporates a land
use decision-making model based on economic activities. In MIROC-INTEG-LAND,
spatially detailed information regarding water resources and crop yields is
reflected in the prediction of future land-use change, which cannot be
considered in the conventional integrated assessment models. In this paper,
we introduce the details and interconnections of the submodels of
MIROC-INTEG-LAND, compare historical simulations with observations, and
identify various interactions between the submodels. By evaluating the
historical simulation, we have confirmed that the model reproduces the
observed states well. The future simulations indicate that changes in
climate have significant impacts on crop yields, land use, and irrigation
water demand. The newly developed MIROC-INTEG-LAND could be combined with
atmospheric and ocean models to develop an integrated earth system model to
simulate the interactions among coupled natural–human earth system
components., European Geoscience Union
Geoscientific Model Development, 2020年10月02日, ［査読有り］ - Analyzing the Uncertainty of Degree Confluence Project for Validating Global Land-Cover Maps Using Reference Data-Based Classification Schemes
Tana Qian; Tsuguki Kinoshita; Minoru Fujii; Yuhai Bao, MDPI
Remote Sensing, 2020年08月11日, ［査読有り］ - A method to map agricultural land abandonment using high spatial and temporal resolution images
Yoshihiko Kobayashi; Tsuguki Kinoshita, ラスト(シニア)オーサー
Proceedings of the 40th Asian Conference on Remote Sensing, 2019年10月14日, ［査読有り］ - Characteristics of the degree of grade in grade‐added rough set for land cover,classification
Y. Ishii; K. Iwao; T. Kinoshita, ラスト(シニア)オーサー
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2019年03月14日, ［査読有り］ - 界面沈降法におけるCa‐モンモリロナイト懸濁液の初期界面高に関する検討
安瀬地 一作; 中石 克也; 木下 嗣基; 石井 暁; 田村 昭典, 土木学会
土木学会論文集B1（水工学）, 2018年11月, ［査読有り］ - 暗期延長，全摘葉，果柄部切断，および熱環状除皮によるキュウリ果実の呼吸速度の低下の減衰係数の比較
田附明夫; 木下嗣基
園芸学研究, 2018年01月15日, ［査読有り］ - Estimating water–food–ecosystem trade-offs for the global negative emission scenario (IPCC-RCP2.6)
Yamagata, Y; Hanasaki, N; Ito, A; Kinoshita, T; Murakami, D; Zhou, Q, Negative emission technologies such as bioenergy with carbon capture and storage (BECCS) are regarded as an option to achieve the climatic target of the Paris Agreement. However, our understanding of the realistic sustainable feasibility of the global lands for BECCS remains uncertain. In this study, we assess the impact of BECCS deployment scenarios on the land systems including land use, water resources, and ecosystem services. Specifically, we assess three land-use scenarios to achieve the total amount of 3.3 GtC year−1 (annual negative emission level required for IPCC-RCP 2.6) emission reduction by growing bioenergy crops which requires huge use of global agricultural and forest lands and water. Our study shows that (1) vast conversion of food cropland into rainfed bio-crop cultivation yields a considerable loss of food production that may not be tolerable considering the population increase in the future. (2) When irrigation is applied to bio-crop production, the bioenergy crop productivity is enhanced. This suppresses the necessary area for bio-crop production to half, and saves the land for agricultural productions. However, water consumption is doubled and this may exacerbate global water stress. (3) If conversion of forest land for bioenergy crop cultivation is allowed without protecting the natural forests, large areas of tropical forest could be used for bioenergy crop production. Forest biomass and soil carbon stocks are reduced, implying degradation of the climate regulation and other ecosystem services. These results suggest that without a careful consideration of the land use for bioenergy crop production, a large-scale implementation of BECCS could negatively impact food, water and ecosystem services that are supporting fundamental human sustainability., Springer Tokyo
Sustainability Science, 2018年, ［査読有り］ - Determination of kaolinite floc size and structure using interface settling velocity
Tsuguki Kinoshita; Katsuya Nakaishi; Yoshihiro Kuroda, Although interface settling methods are generally simple, they are not used to determine physical properties such as size of flocs because the relationship between the physical properties of a floc during the settling process and its settling velocity is poorly understood. In this study, the interface settling method was extended to soft matter such as kaolinite floc, and a technique was developed to measure the size and diameter of the floc during the settling process using an interface settling method. An equation proposed by Michaels and Bolger, based on the relationship between interface settling velocity and the solid volume concentration of interfering hard spheres as originally developed by Richardson and Zaki, can be applied to soft matter such as clay floc. The present study demonstrated that the effective volume of floc, as well as the diameters of individual floc particles, can be measured by the interface settling method. This was achieved by incorporating the equation for the settling of spheres in a viscous fluid into Michaels and Bolger's settling velocity equation. To investigate the validity of the effective volume and diameter of floc, the diameter and settling velocity were also measured visually. The experimental work in this study involved constructing a device in which soft floc material could settle without interruption, recording the settling with a video camera attached to an optical microscope, and measuring the diameters of individual flocs and their settling velocities from the recorded images. The interface settling method and the optical visualization method provide similar results for the effective volume and the diameter of the floc particles when they are compared at the same pH and the same ionic concentrations. This work demonstrates that the interface settling method is an efficient way to measure the size and diameter of soft matter such as kaolinite floc., ELSEVIER SCIENCE BV
APPLIED CLAY SCIENCE, 2017年11月, ［査読有り］ - The expression of a candidate cucumber fruit sugar starvation marker gene CsSEF1 is enhanced in malformed fruit induced by salinity
Tazuke A; Kinoshita T; Asayama M
Physiol. Mol. Biol. Plant, 2017年06月01日, ［査読有り］ - Downscaling Global Emissions and Its Implications Derived from Climate Model Experiments
Shinichiro Fujimori; Manabu Abe; Tsuguki Kinoshita; Tomoko Hasegawa; Hiroaki Kawase; Kazuhide Kushida; Toshihiko Masui; Kazutaka Oka; Hideo Shiogama; Kiyoshi Takahashi; Hiroaki Tatebe; Minoru Yoshikawa, In climate change research, future scenarios of greenhouse gas and air pollutant emissions generated by integrated assessment models (IAMs) are used in climate models (CMs) and earth system models to analyze future interactions and feedback between human activities and climate. However, the spatial resolutions of IAMs and CMs differ. IAMs usually disaggregate the world into 10-30 aggregated regions, whereas CMs require a grid-based spatial resolution. Therefore, downscaling emissions data from IAMs into a finer scale is necessary to input the emissions into CMs. In this study, we examined whether differences in downscaling methods significantly affect climate variables such as temperature and precipitation. We tested two downscaling methods using the same regionally aggregated sulfur emissions scenario obtained from the Asian-Pacific Integrated Model/Computable General Equilibrium (AIM/CGE) model. The downscaled emissions were fed into the Model for Interdisciplinary Research on Climate (MIROC). One of the methods assumed a strong convergence of national emissions intensity (e.g., emissions per gross domestic product), while the other was based on inertia (i.e., the base-year remained unchanged). The emissions intensities in the downscaled spatial emissions generated from the two methods markedly differed, whereas the emissions densities (emissions per area) were similar. We investigated whether the climate change projections of temperature and precipitation would significantly differ between the two methods by applying a field significance test, and found little evidence of a significant difference between the two methods. Moreover, there was no clear evidence of a difference between the climate simulations based on these two downscaling methods., PUBLIC LIBRARY SCIENCE
PLOS ONE, 2017年01月, ［査読有り］ - Expression of the BTB/POZ domain-containing protein Atg63850-like gene CsFDI1 is enhanced by sugar starvation in cucumber fruit
Tazuke A.; T. Kinoshita and M. Asayama, The cDNA of Cucumis sativus Fruit Defoliation Induced 1 (CsFDI1) was newly cloned using the subtraction method from a fruit of a defoliated cucumber (Cucumis sativus L. cv. Tokiwa) plant. An expression analysis of CsFDI1 in fruits and leaves was conducted along with those of the asparagine synthetase 1-like gene (AS) and Cucumis sativus Somatic Embryogenesis Zinc Finger 1 (CsSEF1), previously reported as control marker genes for sugar starvation. The transcript level of CsFDI1 and AS was relatively high, whereas that of CsSEF1 was very low under normal fruit development. The time course of the transcript levels of the three genes under prolonged darkness was compared with that of the fruit respiration rate and leaf starch concentration. The fruit respiration rate suggested that photoassimilate translocation to fruit ceased abruptly under prolonged darkness. The transcript level of CsFDI1, AS, and CsSEF1 increased in fruits, but the time course of the change was quite different in fruits and leaves under the condition of sugar starvation. The response of AS in leaves and CsSEF1 in fruits was close to all-or-none., SPRINGER HEIDELBERG
Acta Physiologia Plantarum, 2015年, ［査読有り］ - Creation of a global land cover and a probability map through a new map integration method
Tsuguki Kinoshita; Koki Iwao; Yoshiki Yamagata, Global land cover maps are widely used for assessment and in research of various kinds, and in recent years have also come to be used for socio-economic forecasting. However, existing maps are not very accurate, and differences between maps also contribute to their unreliability. Improving the accuracy of global land cover maps would benefit a number of research fields. In this paper, we propose a methodology for using ground truth data to integrate existing global land cover maps. We checked the accuracy of a map created using this methodology and found that the accuracy of the new map is 74.6%, which is 3% higher than for existing maps. We then created a 0.5-min latitude by 0.5-min longitude probability map. This map indicates the probability of agreement between the category class of the new map and truth data. Using the map, we found that the probabilities of cropland and grassland are relatively low compared with other land cover types. This appears to be because the definitions of cropland differ between maps, so the accuracy may be improved by including pasture and idle plot categories. (C) 2013 Elsevier B.V. All rights reserved., ELSEVIER
INTERNATIONAL JOURNAL OF APPLIED EARTH OBSERVATION AND GEOINFORMATION, 2014年05月, ［査読有り］ - Creation of a global land cover and a probability map through a new map integration method
Tsuguki Kinoshita; Koki Iwao; Yoshiki Yamagata, Global land cover maps are widely used for assessment and in research of various kinds, and in recent years have also come to be used for socio-economic forecasting. However, existing maps are not very accurate, and differences between maps also contribute to their unreliability. Improving the accuracy of global land cover maps would benefit a number of research fields. In this paper, we propose a methodology for using ground truth data to integrate existing global land cover maps. We checked the accuracy of a map created using this methodology and found that the accuracy of the new map is 74.6%, which is 3% higher than for existing maps. We then created a 0.5-min latitude by 0.5-min longitude probability map. This map indicates the probability of agreement between the category class of the new map and truth data. Using the map, we found that the probabilities of cropland and grassland are relatively low compared with other land cover types. This appears to be because the definitions of cropland differ between maps, so the accuracy may be improved by including pasture and idle plot categories. © 2013 Elsevier B.V., Elsevier B.V.
International Journal of Applied Earth Observation and Geoinformation, 2014年, ［査読有り］ - Spatial–temporal analyses of surface coal mining dominated land degradation in Holingol, Inner Mongolia
Qian, T; H. Bagan; T. Kinoshita; Y. Yamagata, Surface coal mining and urbanization, as well as crop-based agriculture, have resulted in accelerated degradation and desertification of grasslands in the Holingol region, Inner Mongolia Autonomous Region, over the last three decades. The purpose of this study was to investigate the spatial-temporal changes of land cover due to the surface coal-mining activities in the Holingol region from 1978 to 2011. In this study, we used the subspace method to apply land-cover classification schemes to Landsat archival images from 1978, 1988, 1999, and 2011. We then used the grid square method to investigate spatial-temporal land-cover changes during the period of 1978-2011. The results show that both surface coal mining and urban areas have increased dramatically. This expansion was accompanied by considerable loss of grassland and wetland. Grid-cell-based spatial-temporal analysis showed that urban/bare expansion had a strong negative correlation with grassland change (-0.67), coal-mining area expansion had a negative correlation with grassland change (-0.29), and coal-mining area expansion was positively correlated with urban/bare expansion (0.21). Furthermore, the correlation coefficients of land-cover categories for three time intervals between 1978 and 2011 (1978-1988, 1988-1999, and 1999-2011) showed that there was almost no correlation between grassland and coal-mining area in 1978-1988 and 19881999, but the correlation coefficient became negative (-0.21) in 1999-2011., IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2014年, ［査読有り］ - メコンデルタにおける気候変動への脆弱性と適応策
田村 誠; 信岡 尚道; 木下 嗣基; 田林 雄; LING Frank Hiroshi; 安島 清武; タムラ マコト; ノブオカ ヒサミチ; キノシタ ツグキ; リング フランク ヒロシ; アジマ キヨタケ; TAMURA Makoto; NOBUOKA Hisamichi; KINOSHITA Tsuguki; TABAYASHI Yu; AJIMA Kiyotake, 茨城大学人文学部
茨城大学人文学部紀要. 社会科学論集, 2013年09月 - Evaluation of spatially explicit emission scenario of land-use change and biomass burning using a process-based biogeochemical model
Etsushi Kato; Tsuguki Kinoshita; Akihiko Ito; Michio Kawamiya; Yoshiki Yamagata, Informa UK Limited
Journal of Land Use Science, 2013年03月, ［査読有り］ - The effects of NaCl salinity and solution temperature on the leaf wilting of snap bean (Phaseolus vulgaris L.) Plantlets Grown Hydroponically
Akio Tazuke; Tsuguki Kinoshita, The effects of NaCl salinity and low solution temperature on the leaf wilting and transpiration rate of snap bean -Phaseolus vulgaris L.) plantlets grown hydroponically were examined. The image of a plant was recorded every 5 min after the start of the treatment. From the plant images, leaf curling could be detected almost unambiguously by the human eye. The decline in leaf blades was evaluated by the relative change in the y coordinate of the center of gravity of the leaf region in a plant image (wilting index). The response of the wilting index to salinity was close to that of transpiration rate and continuous. The ratio of plants with curled leaves was the most sensitive indicator of plant response to stresses in the range of 50 to 100 mM NaCl. Its response was close to all-or-none. It showed a marked interaction of the effects of salinity shock and temperature shock of the nutrient solution. Combined with 60 mM NaCl, solution temperature even at 20C caused marked leaf curling whereas 60 mM NaCl combined with solution temperature at 25C did not cause leaf curling.
Environmental Control in Biology, 2013年, ［査読有り］ - Combination of AVNIR-2, PALSAR, and Polarimetric Parameters for Land Cover Classification
Hasi Bagan; Tsuguki Kinoshita; Yoshiki Yamagata, We evaluate the potential of combined Advanced Land Observing Satellite Advanced Visible and Near-Infrared (AVNIR-2) and fully polarimetric Phased-Array-type L-band Synthetic Aperture Radar (PALSAR) data for land cover classification. Optical AVNIR-2 and fully polarimetric PALSAR can provide both surface spectral information and scattering information of the ground surface. The fully polarimetric PALSAR is particularly important for land cover classification because quad-polarization PALSAR data and its polarimetric parameters contain additional surface information. As a consequence, by combining optical AVNIR-2, PALSAR, and polarimetric parameters into a single data set, land cover classification accuracy may be further improved. For efficient and convenient handling of the combined multisource data, we used a subspace method for the classification and estimated its classification capability for various combinations of optical, PALSAR, and polarimetric parameter data sets in the Lake Kasumigaura region of Japan. We also compared the results obtained using the subspace method with those obtained by the support vector machine (SVM) and maximum-likelihood classification (MLC) methods. The classification results confirm that, when the combined optical AVNIR-2, PALSAR, and polarimetric coherency matrix data were used, the classification accuracy of the subspace method was better than that when other data combinations were used. The subspace method also performed better than the SVM or MLC method in high-dimensional data set classification. Moreover, the experimental results demonstrated that the proposed subspace method is robust for data classification when there is data redundancy and thus allows optimal feature selection procedures to be avoided., IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 2012年04月, ［査読有り］ - armonization of land-use scenarios for the period 1500–2100: 600 years of global gridded annual land-use transitions, wood harvest, and resulting secondary lands
Hurtt, G. C; L. P. Chini; S. Frolking; R. A. Betts; J. Feddema; G. Fischer; J. P. Fisk; K. Hibbard; R. A. Houghton; A. Janetos; C. D. Jones; G. Kindermann; T. Kinoshita; Kees Klein Goldewijk; K. Riahi; E. Shevliakova; S. Smith; E. Stehfest; A. Thomson; P. Thornton; D. P. van Vuuren; Y. P. Wang, In preparation for the fifth Assessment Report (AR5) of the Intergovernmental Panel on Climate Change (IPCC), the international community is developing new advanced Earth System Models (ESMs) to assess the combined effects of human activities (e. g. land use and fossil fuel emissions) on the carbon-climate system. In addition, four Representative Concentration Pathway (RCP) scenarios of the future (2005-2100) are being provided by four Integrated Assessment Model (IAM) teams to be used as input to the ESMs for future carbon-climate projections (Moss et al. 2010). The diversity of approaches and requirements among IAMs and ESMs for tracking land-use change, along with the dependence of model projections on land-use history, presents a challenge for effectively passing data between these communities and for smoothly transitioning from the historical estimates to future projections. Here, a harmonized set of land-use scenarios are presented that smoothly connects historical reconstructions of land use with future projections, in the format required by ESMs. The land-use harmonization strategy estimates fractional land-use patterns and underlying land-use transitions annually for the time period 1500-2100 at 0.5 degrees x 0.5 degrees resolution. Inputs include new gridded historical maps of crop and pasture data from HYDE 3.1 for 1500-2005, updated estimates of historical national wood harvest and of shifting cultivation, and future information on crop, pasture, and wood harvest from the IAM implementations of the RCPs for the period 2005-2100. The computational method integrates these multiple data sources, while minimizing differences at the transition between the historical reconstruction ending conditions and IAM initial conditions, and working to preserve the future changes depicted by the IAMs at the grid cell level. This study for the first time harmonizes land-use history data together with future scenario information from multiple IAMs into a single consistent, spatially gridded, set of land-use change scenarios for studies of human impacts on the past, present, and future Earth system., SPRINGER
Climatic Change, 2011年11月, ［査読有り］ - An emission pathway for stabilization at 6 Wm−2 radiative forcing
Masui, T; K. Matsumoto; Y. Hijioka; T. Kinoshita; T. Nozawa; S. Ishiwatari; E. Kato; P. R. Shukla; Y. Yamagata; M. Kainuma, Representative Concentration Pathway 6.0 (RCP6) is a pathway that describes trends in long-term, global emissions of greenhouse gases (GHGs), short-lived species, and land-use/land-cover change leading to a stabilisation of radiative forcing at 6.0 Watts per square meter (Wm(-2)) in the year 2100 without exceeding that value in prior years. Simulated with the Asia-Pacific Integrated Model (AIM), GHG emissions of RCP6 peak around 2060 and then decline through the rest of the century. The energy intensity improvement rates changes from 0.9% per year to 1.5% per year around 2060. Emissions are assumed to be reduced cost-effectively in any period through a global market for emissions permits. The exchange of CO2 between the atmosphere and terrestrial ecosystem through photosynthesis and respiration are estimated with the ecosystem model. The regional emissions, except CO2 and N2O, are downscaled to facilitate transfer to climate models., SPRINGER
Climatic Change, 2011年11月, ［査読有り］ - Development of spatially explicit emission scenario from land-use change and biomass burning for the input data of climate projection
Etsushi Kato; Michio Kawamiya; Tsuguki Kinoshita; Akihiko Ito, In the preparatory phase of IPCC AR5 development, Representative Concentration Pathways (RCPs) have been constructed by Integrated Assessment Models (IAMs) groups as new forcing scenarios used for climate modeling and earth system modeling groups. In the process of RCP 6.0 scenario development, which has been conducted by the Asia-Pacific Integrated Model (AIM), we constructed a scenario of spatially explicit long-term aerosol emissions from biomass burning and net land-use change CO2 emissions in order to complement energy use and industrial emissions scenarios projected by socio-economic component of AIM. To estimate the emissions from biomass burning, we incorporate a vegetation fire component into the terrestrial biogeochemical process model VISIT (Vegetation Integrative SImulation Tool). For the net land-use change CO2 emission, we use gridded land-use change transition matrix data developed in the process of downscaling the RCP6.0 land use scenario for the evaluation of emission from deforestation (primary land and secondary land into cropland, pasture, and urban), and also the evaluation of regrowth absorption from abandonment of cropland and pasture. In this process, uncertainty of land emissions due to the effect of CO2 concentration and land-use scenario is examined, and reveals significant effect of CO2 fertilization effect on vegetation to the land emissions. (C) 2011 Published by Elsevier Ltd. Selection under responsibility of S. Cornell, C. Downy and S. Colston., ELSEVIER SCIENCE BV
EARTH SYSTEM SCIENCE 2010: GLOBAL CHANGE, CLIMATE AND PEOPLE, 2011年, ［査読有り］ - Creation of new global land cover map with map integration
Iwao, K; K. N. Nasahara; T. Kinoshita; Y. Yamagata; D. Patton; S. Tsuchida, Scientific Research
Journal of Geographic Information System, 2011年, ［査読有り］ - Combination of AVNIR-2, PALSAR, and Polarimetric Parameters for Land Cover Classification
Bagan, H; T. Kinoshita; Y. Yamagata
IEEE Transactions on Geoscience and Remote Sensing, 2011年, ［査読有り］ - Woody biomass supply potential for thermal power plants in Japan
Tsuguki Kinoshita; Takashi Ohki and Yoshiki Yamagata, Biomass energy is one of mitigation method of CO(2) reduction. In Japan, it aimed to reduce fossil fuels supply 670,000 kL of crude oil equivalent in thermal power plants and 340,000 kL of crude oil equivalent in the utilization of heat by biomass. It was decided to use 25% or more of the forestry products such as logging residues. Japanese government aim to supply 634 PJ of woody biomass for power generation in 2010. This amount of energy accounts for 2.8% of total primary energy. More than 68% of Japan is covered by forests, and more than 40% of these forests are plantations. But the use of woody biomass is limited because it is still not seen as economically viable. In this article, we developed a large scale forestry economic model which can estimate the wood chips supply for coal thermal power plants across all around Japan. By using this model, wood chips supply potential is currently 32,000 m(3)/year and supply will increase drastically when wood chips price increase or carbon credit is installed and we found that biomass production of 15 PJ that is the numeric target of Japanese government is possible. Especially, the lengthening of rotation period of forestry and the decrease of wood chips transportation cost is important for wood chips use in coal thermal plant. (C) 2009 Elsevier Ltd. All rights reserved., ELSEVIER SCI LTD
Applied Energy, 2010年, ［査読有り］ - Land Cover Classification and Change Analysis in the Horqin Sandy Land From 1975 to 2007
Hasi Bagan; Wataru Takeuchi; Tsuguki Kinoshita; Yuhai Bao; and Yoshiki Yamagata, Observations over the last three decades show that desertification poses a serious threat to the livelihood and productivity of inhabitants of the Horqin Sandy Land region of China. We evaluated the dynamics and trends of changes of land cover in the Horqin Sandy Land by using Landsat archive images from 1975, 1987, 1999, and 2007. We applied two supervised classification methods, the self-organizing map neural network method and the subspace method. Our analyses revealed significant changes to land cover over the period 1975-2007. The area of cropland doubled over the last three decades. This expansion was accompanied by large increases in water consumption and considerable loss of areas of grassland and woodland. Many lakes and rivers shrank rapidly or disappeared in this region between 1975 and 2007. The sandy area expanded rapidly from 1975 to 1987 but gradually slowed thereafter., IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING, 2010年, ［査読有り］ - Slow jet plume due to submarine groundwater discharge
Tsuguki Kinoshita; Shigeru Tabeta; Nao Tanabe, Ocean coastal zones are eutrophicated by fertilizer loading from agricultural activity. Contaminant loading occurs not only from rivers but also from groundwater. Recent studies have found that patterns of seaweed growth in groundwater discharge areas differ from those in other areas. We studied the behavior of groundwater discharged from the sea bottom into ocean currents by both conducting a hydraulics experiment to simulate groundwater discharge, and mathematically modeling the rising trajectory of water discharged with low velocity into a constant horizontal background flow. Both approaches showed that, due to turbulence of the horizontal background flow, low velocity discharged water flows first along the sea bottom, then follows a gently rising trajectory. This result is helpful to know the influence of submarine groundwater discharge on marine ecosystem. Citation: Kinoshita, T., S. Tabeta, and N. Tanabe (2009), Slow jet plume due to submarine groundwater discharge, Geophys. Res. Lett., 36, L14603, doi: 10.1029/2009GL038562., AMER GEOPHYSICAL UNION
GEOPHYSICAL RESEARCH LETTERS, 2009年07月, ［査読有り］ - Simulations of Supply and Demand of Marine Products by Food Economy Model
Shigeru Tabeta; Tsuguki Kinoshita; Yasuhiro Shimizu
The Pacific Congress on Marine Science and Technology: 2008 Refereed Publication, 2009年, ［査読有り］ - A Spatial Evaluation of Forest Biomass Usage Using GIS
Tsuguki Kinoshita; Keisuke Inoue; Koki Iwao; Hiroshi Kagemoto and Yoshiki Yamagata, We conducted a spatial evaluation of forest biomass usage using a geographic information system (CIS) for the Japanese town of Yusuhara. In Japan, over 60% of the land is covered with forest, of which at least 40% is artificial forest. However, because of high labor costs, the profitability of forestry is decreasing, so timber cultivation is not done to the extent that it could be, and thinning has to be subsidized. Under these circumstances, much of the forest is deteriorating. Most of the thinning is accounted for by throwaway thinning, in which the resulting wood is not used. However, with the steep rise in oil prices and the intensification of global warming concerns, expectations are rising for the use of biomass energy from thinned timber that has previously been discarded. If thinned timber, logging residues, and offcuts are utilized for biomass energy and their economic value becomes apparent, profitability will improve for both final cutting and thinning. And in addition to forestry activities being invigorated, it will be possible for some of the deteriorating forests (which have associated dangers such as landslides) to recover. However, using thinned timber and logging residues is problematic in that profitability is affected by harvesting costs. Harvesting costs are largely determined by geographic factors and are higher for more distant stands. Accordingly, in this article, operational costs for different stands are calculated using CIS and matched with total demand in the subject region. in addition, stands with lower operational costs are identified and an investigation of a highly feasible use of forest biomass is carried out. (c) 2008 Elsevier Ltd. All rights reserved., ELSEVIER SCI LTD
Applied Energy, 2009年, ［査読有り］ - Investigating the rank-size relationship of urban areas using land cover maps
Tsuguki Kinoshita; Etsushi Kato; Koki Iwao; Yoshiki Yamagata, We investigated the possibility that the rank-size rule can be applied to the relationship between urban size and rank order. Accordingly, using a global land cover data set, we clustered contiguous urban grid cells, calculated the area in each cluster, and ranked urban areas in each of the countries studied. This research revealed that Zipf's law can be applied to the relationship between urban area and rank order as well as to city populations. Comparisons were made in some countries, and it was shown that the urban area rank-size rule was free from administrative boundaries. Finally, in Japan, using land-use maps for several times in recent history, changes in rank-size were investigated. As a result, it was found that the slopes for urban areas did not change vis-a-vis their rank in a double logarithmic graph and that only the x and y interception changed., AMER GEOPHYSICAL UNION
GEOPHYSICAL RESEARCH LETTERS, 2008年09月, ［査読有り］ - 海底湧出地下水の沿岸海域環境への影響に関する基礎的検討
多部田茂; 田辺直; 河島洋平; 木下嗣基
Journal of Coastal Zone Studies, 2008年03月, ［査読有り］ - A FUNDAMENTAL STUDY ON THE INFLUENCES OF SUBMARINE GROUNDWATER DISCHARGE ON COASTAL WATER ENVIRONMENT
Shigeru Tabeta; Tsuguki Kinoshita
PROCEEDINGS OF THE 27TH INTERNATIONAL CONFERENCE ON OFFSHORE MECHANICS AND ARCTIC ENGINEERING - 2008, VOL 3, 2008年, ［査読有り］ - 炭素クレジットが土地利用に与える影響の予測
木下嗣基、山形与志樹、岩男弘毅
環境科学会誌, 2008年, ［査読有り］ - Validating land cover maps with Degree Confluence Project information
Koki Iwao; Kenlo Nishida; Tsuguki Kinoshita; and Yoshiki Yamagata, We propose the use of Degree Confluence Project (hereby DCP) information as a new method for validating land cover maps. The DCP is a volunteer-based project that aims to collect onsite information from all the degree confluences (intersections of integer level latitude and longitude gridlines) in the world. We assessed the reliability and effectiveness of DCP-derived data in validating land cover maps. As a result, we obtained land cover validation information superior to the validation information obtained by visual interpretation of Landsat images. By using DCP-derived validation information (at 749 confluences), we evaluated existing land cover maps for Eurasia (GLC2000, MOD12, UMD, and GLCC). The agreements between the DCP-derived validation information and the land cover maps were 55% for GLC2000, 58% for MOD12, 54% for UMD, and 50% for GLCC. Although MOD12 and GLC2000 had somewhat better agreements than the other maps, there is no significant difference between the two., AMER GEOPHYSICAL UNION
GEOPHYSICAL RESEARCH LETTERS, 2006年, ［査読有り］ - Numerical simulation of tidal current in the coastal region with an artificial seabed mound for upwelling
Shigeru Tabeta; Tsuguki Kinoshita; Yuta Shimizu
Proceedings of the 24th International Conference on Offshore Mechanics and Arctic Engineering, Vol 2, 2005年, ［査読有り］ - Investigation for modelling of sessile organisms on coastal floating structures
Shigeru Tabeta; Tsuguki Kinoshita; Daisuke Kitazawa; Masataka Fujino; Takayoshi Kato; Akira Sasaki; Toshiyuki Iume, Through the investigation about environmental impacts of Mega-Float, it is revealed that the effect of sessile organisms adhering on the floating structure is significant. However there had been little information about activities of the sessile organisms on floating structures and their influences on water and bottom quality. Therefore, some experiments were carried out to investigate the uncertain processes caused by the sessile organisms. An instrument called "Bell-jar", which is composed of an enclosed container and several sensors for measuring water quality in it, was developed to measure the activities of sessile organisms on artificial bases set in Tokyo Bay. Through the experiments using Bell-jar, the consumption rate of dissolved oxygen and Chlorophyll-a, and emission rate of nutrients by the sessile organisms were measured. By fitting the model to these results, the parameters for activities of sessile organisms such as respiration rate and filtering rate were determined. The experiments have been carried out under various conditions of water temperature and salinity and it is clarified that the activities of sessile organisms very much depend on the water temperature and salinity. The behavior of particulate organic matters excreted from the sessile organisms is also investigated by laboratory experiments. These results were used to improving the model of sessile organisms, which is incorporated into the numerical ecosystem model for environmental impact assessment of very large floating structures.
Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE, 2004年, ［査読有り］ - Numerical simulation of artificial purification system by using hydrostatic and FULL-3D combined model
Tsuguki Kinoshita; Shigeru Tabeta; Masataka Fujino
Proc. 22nd International Conference on Offshore Mechanics and Arctic Engineering, 2003年, ［査読有り］ - 浮体動揺による自由表面の平均水位の変動について
木下嗣基、影本浩, In the usual linear wave-body interaction problems, the variation of the space-wise mean level of the free-surface is ignored and the free-surface boundary condition is imposed on the calm water-surface level. In some problems, however, the variation of the mean free-surface displacement can be so large that it can no longer be ignored even in a linear theory. In the present paper, the formulation that accounts for such effect is presented. As an example application of the presented formulation, the water-surface displacements associated with an oil recovery ship, part of which consists of a water-way bounded by a shallow bottom plate, are computed and compared with experimental results., 日本造船学会
日本造船学会論文集, 1999年, ［査読有り］
MISC
- GEO Gridにおける全球土地被覆図検証システムの実装
岩男弘毅; 山本直孝; 奈佐原顕郎; PATTON Dave; 木下嗣基; 山形与志樹; 土田聡; 関口智嗣
日本リモートセンシング学会学術講演会論文集, 2008年 - Fundamental study on the behaviour of submarine groundwater discharged into the coastal sea
Shigeru Tabeta; Nao Tanabe; Tsuguki Kinoshita
OCEANS 2006 - ASIA PACIFIC, VOLS 1 AND 2, 2006年 - 2003A-GS1-7 浮体式構造物の付着生物モデルに関する検討(第2報)(一般講演(GS1))
多部田 茂; 北澤 大輔; 木下 嗣基; 加藤 孝義; 井梅 俊行
日本造船学会講演会論文集, 2003年
