A5029851038- Atmospheric and Environmental Gas Dynamics
- Soil Carbon and Nitrogen Dynamics
- Soil and Water Nutrient Dynamics
- Plant Water Relations and Carbon Dynamics
- Radioactive contamination and transfer
- Climate variability and models
- Isotope Analysis in Ecology
- Climate change impacts on agriculture
- Nuclear and radioactivity studies
- Radioactivity and Radon Measurements
- Hydrology and Watershed Management Studies
- Groundwater and Isotope Geochemistry
- Wastewater Treatment and Nitrogen Removal
- Radioactive element chemistry and processing
- Water-Energy-Food Nexus Studies
- Climate change and permafrost
- Cryospheric studies and observations
- Oil Palm Production and Sustainability
- Soil Geostatistics and Mapping
- Atmospheric chemistry and aerosols
- Agriculture, Soil, Plant Science
- Environmental Impact and Sustainability
- Agriculture Sustainability and Environmental Impact
- Forest ecology and management
- Geology and Paleoclimatology Research
National Institute for Environmental Studies
2016-2025
Research Institute for Humanity and Nature
2024
National Agriculture and Food Research Organization
2022
Auburn University
2017
Lampung University
2016
Yokohama National University
2009-2016
Tokyo University of Agriculture and Technology
2016
Nagoya University
2009
Future climate change and increasing atmospheric CO 2 are expected to cause major changes in vegetation structure function over large fractions of the global land surface. Seven models used analyze possible responses future simulated by a range general circulation run under all four representative concentration pathway scenarios changing concentrations greenhouse gases. All 110 simulations predict an increase carbon 2100, but with substantial variation between models. For example, at 4 °C...
Abstract. The flux of carbon dioxide from the soil to atmosphere (soil respiration) is one major fluxes in global cycle. At present, accumulated field observation data cover a wide range geographical locations and climate conditions. However, there are still large uncertainties magnitude spatiotemporal variation respiration. Using respiration set, we developed climate-driven model by modifying updating Raich's model, distribution was examined using this model. applied at spatial resolution...
The impacts of global climate change on different aspects humanity’s diverse life-support systems are complex and often difficult to predict. To facilitate policy decisions mitigation adaptation strategies, it is necessary understand, quantify, synthesize these climate-change impacts, taking into account their uncertainties. Crucial an understanding how in sectors overlap, as overlapping increase exposure, lead interactions likely raise pressure. As a first step we develop herein framework...
Abstract The extent and impact of climate‐related extreme events depend on the underlying meteorological, hydrological, or climatological drivers as well human factors such land use population density. Here we quantify pure effect historical future climate change exposure to using an unprecedentedly large ensemble harmonized simulations from Inter‐Sectoral Impact Model Intercomparison Project phase 2b. Our results indicate that global warming has already more than doubled both area annually...
Terrestrial gross primary productivity (GPP) is the largest component of global carbon cycle and a key process for understanding land ecosystems dynamics. In this study, we used GPP estimates from combination eight biome models participating in Inter-Sectoral Impact-Model Intercomparison Project phase 2a (ISIMIP2a), Moderate Resolution Spectroradiometer (MODIS) product, data-driven product (Model Tree Ensemble, MTE) to study spatiotemporal variability at regional levels. We found 2000–2010...
Abstract. The length of time that carbon remains in forest biomass is one the largest uncertainties global cycle, with both recent historical baselines and future responses to environmental change poorly constrained by available observations. In absence large-scale observations, models used for assessments tend fall back on simplified assumptions turnover rates soil pools. this study, times calculated an ensemble contemporary terrestrial biosphere (TBMs) are analysed assess their current...
Abstract. Excessive anthropogenic nitrogen (N) inputs to the biosphere have disrupted global cycle. To better quantify spatial and temporal patterns of N inputs, assess their impacts on biogeochemical cycles planet living organisms, improve use efficiency (NUE) for sustainable development, we developed a comprehensive synthetic dataset reconstructing History Nitrogen (HaNi) terrestrial biosphere. The HaNi takes advantage different data sources in spatiotemporally consistent way generate set...
Abstract Calibration of global hydrological models (GHMs) has been attempted for over two decades; however, an effective and generic calibration method not explored. We present a novel framework calibrating GHMs assuming that parameters can be regionalized by climate similarities. calibrated four sensitive the H08 model aggregating results 5,000 simulations with randomly generated into 11 Köppen classes using objective function Nash–Sutcliffe Efficiency (NSE) random sampling from proposed...
Abstract The release of carbon dioxide from the soil to atmosphere, known as respiration, is second largest terrestrial flux after photosynthesis, but convergence data-driven estimates unclear. Here we collate all historical global respiration analyze and uncertainty in estimates. Despite development a dataset advanced scaling techniques last two decades, find that inter-model variability has increased. Reducing not an easy task, when puzzle pieces cycle fit together perfectly, climate...
<strong class="journal-contentHeaderColor">Abstract.</strong> Future changes in runoff can have important implications for water resources and flooding. In this study, projections from ISI-MIP (Inter-sectoral Impact Model Intercomparison Project) simulations forced with HadGEM2-ES bias-corrected climate data under the Representative Concentration Pathway 8.5 been analysed differences between impact models. Projections of change a baseline period (1981â2010) to future (2070â2099) 12...
Climate change may pose a high risk of to Earth's ecosystems: shifting climatic boundaries induce changes in the biogeochemical functioning and structures ecosystems that render it difficult for endemic plant animal species survive their current habitats. Here we aggregate ecosystem state as proxy these shifts at different levels global warming. Estimates are based on simulations from seven vegetation models (GVMs) driven by future climate scenarios, allowing quantification related...
Abstract. Currently, available historical global N fertilizer map as an input data to biogeochemical model is still limited and existing maps were not considered NH4+ NO3− in the application rates. This paper provides a method for constructing new nitrogen (0.5° × 0.5° resolution) period 1961–2010 based on country-specific information from Food Agriculture Organization statistics (FAOSTAT) various datasets. incorporates fraction of (and NO3−) inputs by utilizing species FAOSTAT, which can be...
Actual land evapotranspiration (ET) is a key component of the global hydrological cycle and an essential variable determining evolution extreme events under different climate change scenarios. However, recently available ET products show persistent uncertainties that are impeding precise attribution human-induced change. Here, we aim at comparing range independent monthly estimates with historical model simulations from water, agriculture, biomes sectors participating in second phase...
Abstract Carbon fluxes at the land‐atmosphere interface are strongly influenced by weather and climate conditions. Yet what is usually known as “climate extremes” does not always translate into very high or low carbon so‐called “carbon extremes.” To reveal patterns of how extremes influence terrestrial fluxes, we analyzed interannual variations in ecosystem simulated Terrestrial Biosphere Models (TBMs) Inter‐Sectoral Impact Model Intercomparison Project. At global level, TBMs reduced net...
Abstract. Soil organic carbon (SOC) is the largest pool in terrestrial ecosystems and may play a key role biospheric feedbacks with elevated atmospheric dioxide (CO2) warmer future world. We examined simulation results of seven biome models when forced climate projections from four representative-concentration-pathways (RCPs)-based concentration scenarios. The goal was to specify calculated uncertainty global SOC stock regional perspectives give insight improvement SOC-relevant processes...
Simulating vegetation photosynthetic productivity (or gross primary production, GPP) is a critical feature of the biome models used for impact assessments climate change. We conducted benchmarking global GPP simulated by eight participating in second phase Inter-Sectoral Impact Model Intercomparison Project (ISIMIP2a) with four meteorological forcing datasets (30 simulations), using independent estimates and recent satellite data solar-induced chlorophyll fluorescence as proxy GPP. The...
Abstract. The flux of carbon dioxide from the soil to atmosphere (soil respiration) is one major fluxes in global cycle. At present, accumulated field observation data cover a wide range geographical locations and climate conditions. However, there are still large uncertainties magnitude spatiotemporal variation respiration. Using respiration dataset, we developed climate-driven model by modifying updating Raich's model, distribution was examined using this model. applied at spatial...
This study assessed historical changes in emissions of nitrous oxide (N2O), a potent greenhouse gas and stratospheric ozone-depleting substance, from the soils East Asia to atmosphere. A process-based terrestrial ecosystem model (VISIT) was used simulate nitrogen cycle associated N2O as function climate, land use, atmospheric deposition, agricultural inputs 1901 2016. The mean regional emission rate 2000s estimated be 2.03 Tg year−1 (1.29 N year−1; approximately one-third natural ecosystems...
Abstract Most of the area contaminated by Fukushima Daiichi Nuclear Power Plant accident is covered forest. In this paper, we updated model predictions temporal changes in 137 Cs dynamics using latest observation data and newly provided maps predicted activity concentration for wood, which most commercially important part tree body. Overall, previous prediction were very good agreement. However, further validation revealed that migration from soil surface organic layer to mineral was...
The benefits of the artificial fixation reactive nitrogen (Nr, [N] compounds other than dinitrogen), in form N fertilizers and materials are huge, while at same time posing substantial threats to human ecosystem health by release Nr environment. To achieve sustainable use, loss environment must be reduced. An N-budget approach national level would allow us fully grasp whole picture through quantification important flows country. In this study, budgets Japan were estimated from 2000 2015...
The purpose of this study is to evaluate the eight ISIMIP2a biome models against independent estimates long-term net carbon fluxes (i.e. Net Biome Productivity, NBP) over terrestrial ecosystems for recent four decades (1971–2010). We modeled global NBP 1) updated residual land sink (RLS) plus use emissions (ELUC) from Global Carbon Project (GCP), presented as R + L in by Le Quéré et al (2015), and 2) CO2 two atmospheric inversion systems: Jena CarboScope s81_v3.8 CAMS v15r2, referred FJena...
Abstract. Climate change and its impacts already pose considerable challenges for societies that will further increase with global warming (IPCC, 2014a, b). Uncertainties of the climatic response to greenhouse gas emissions include potential passing large-scale tipping points (e.g. Lenton et al., 2008; Levermann 2012; Schellnhuber, 2010) changes in extreme meteorological events (Field 2012) complex on (Hallegatte 2013). Thus climate mitigation is considered a necessary societal avoiding...