A5033225530- Plant Water Relations and Carbon Dynamics
- Forest ecology and management
- Hydrology and Watershed Management Studies
- Tree-ring climate responses
- Climate variability and models
- Plant responses to elevated CO2
- Hydrology and Sediment Transport Processes
- Atmospheric and Environmental Gas Dynamics
- Soil and Unsaturated Flow
- Ecology and Vegetation Dynamics Studies
- Remote Sensing in Agriculture
- Soil erosion and sediment transport
- Peatlands and Wetlands Ecology
- Fire effects on ecosystems
- Cryospheric studies and observations
- Meteorological Phenomena and Simulations
- Soil and Water Nutrient Dynamics
- Soil Carbon and Nitrogen Dynamics
- Irrigation Practices and Water Management
- Flood Risk Assessment and Management
- Remote Sensing and LiDAR Applications
- Tree Root and Stability Studies
- Conservation, Biodiversity, and Resource Management
- Environmental and Agricultural Sciences
- Forest Management and Policy
Nagoya University
2015-2024
University of Hawaiʻi at Mānoa
2021-2024
University of Hawaii System
2021-2024
The University of Tokyo
2005-2024
Bunkyo University
2020
Kyushu University
2004-2014
Duke University
2003-2012
University of Miyazaki
2001-2005
Joensuu Science Park
2005
Research Institute for Humanity and Nature
2004
Abstract Tropical vegetation is a major source of global land surface evapotranspiration, and can thus play role in hydrological cycles atmospheric circulation. Accurate prediction tropical evapotranspiration critical to our understanding these processes under changing climate. We examined the controls on at 21 pan‐tropical eddy covariance sites, conducted comprehensive systematic evaluation 13 models assessed ability scale up model estimates for test region Amazonia. Net radiation was...
Abstract The memory timescale that characterizes root‐zone soil moisture remains the dominant measure in seasonal forecasts of land‐climate interactions. This is a quasi‐deterministic associated with losses (e.g., evapotranspiration) from column and often interpreted as persistence states. Persistence, however, represents distribution time periods where resides above or below some prescribed threshold therefore inherently probabilistic. Using multiple data sets collected at high resolution...
Abstract The effects of rainfall conditions and the morphological characteristics leaves on moisture dynamics litter layers were investigated. Maximum water storage capacity interception under various evaluated for two contrasting types: a needle‐leaf type, represented by Cryptomeria japonica leaves; broad‐leaf Lithocarpus edulis leaves. An artificial simulator was applied to measure each type's intensities. Our results indicated that (1) maximum layer proportional mass (kg/m 2 ) regardless...
Although Bornean tropical rainforests are among the moistest biomes in world, they sporadically experience periods of water stress. The observations indicate that these ecosystems tend to have little regulation use, despite episodes relatively severe drought. This water-use behaviour is often referred as anisohydric behaviour, opposed isohydric plants regulate stomatal movement prevent hydraulic failure. it generally thought an adaptation more drought-prone habitats, we show may also be...
Abstract To investigate the effects of expanding rubber ( Hevea brasiliensis ) cultivation on water cycling in Mainland Southeast Asia (MSEA), evapotranspiration ET was measured within plantations at Bueng Kan, Thailand, and Kampong Cham, Cambodia. After energy closure adjustment, mean annual 1211 1459 mm yr −1 Thailand Cambodia sites, respectively, higher than that other tree‐dominated land covers region, including tropical seasonal forest (812–1140 ), savanna (538–1060 ). The proportion...
Abstract Nature‐based solutions for water‐resource challenges require advances in the science of ecohydrology. Current understanding is limited by a shortage observations and theories that can further our capability to synthesize complex processes across scales ranging from submillimetres tens kilometres. Recent developments environmental sensing, data, modelling have potential drive rapid improvements ecohydrological understanding. After briefly reviewing sensor technologies, this paper...
Abstract Rising atmospheric CO 2 concentration ([CO ]) enhances photosynthesis and reduces transpiration at the leaf, ecosystem, global scale via fertilization effect. The effect is among most important processes for predicting terrestrial carbon budget future climate, yet it has been elusive to quantify. For evaluating on land transpiration, we developed a technique that isolated this from other confounding effects, such as changes in using noisy time series of observed land-atmosphere...
Although coarse woody debris (CWD) is an important component of stream ecosystems in forested areas, the processes CWD distribution, transport, and retention have not been clarified. In this study distribution process pieces shorter than bankfull width (S‐CWD) discussed using situ field experiment log transport a survey mountain streams. The showed that distance has close relation to flow depth also implied magnitude sequence series flows were factors for S‐CWD indicated in‐stream...
Abstract. Eddy covariance observations play a pivotal role in understanding the land–atmosphere exchange of energy, water, carbon dioxide (CO2), and other trace gases, as well global cycle earth system. To promote networking individual measurements sharing data, FLUXNET links regional networks researchers studying processes. JapanFlux was established 2006 country branch AsiaFlux. Despite growing number shared data globally, availability Asia is currently limited. In this study, we developed...
We examined the impact of both seasonal and year‐to‐year variations in precipitation on simulated soil moisture dynamics at a tropical rain forest (TRF) site (TSF) Southeast Asia, between which there is clear difference regime, through probabilistic ecohydrological model. All model parameters have apparent physical meaning were obtained by field observations. Rainfall statistics as primary forcing terms constructed from long‐term rainfall records, their analysis revealed close relationship...