A5044835178- Plant Water Relations and Carbon Dynamics
- Remote Sensing in Agriculture
- Forest ecology and management
- Species Distribution and Climate Change
- Atmospheric and Environmental Gas Dynamics
- Climate variability and models
- Land Use and Ecosystem Services
- Tree-ring climate responses
- Horticultural and Viticultural Research
- Ecology and Vegetation Dynamics Studies
- Remote Sensing and LiDAR Applications
- Plant Physiology and Cultivation Studies
- Soil Carbon and Nitrogen Dynamics
- Hydrology and Watershed Management Studies
- Leaf Properties and Growth Measurement
- Plant Ecology and Soil Science
- Plant responses to elevated CO2
- Plant and animal studies
- Fire effects on ecosystems
- Urban Heat Island Mitigation
- Soil and Unsaturated Flow
- Plant Reproductive Biology
- Cryospheric studies and observations
- Ecology and Conservation Studies
- Meteorological Phenomena and Simulations
Gifu University
2016-2025
Tohoku University
2006-2021
Tokyo Metropolitan University
2021
Suzuki (Japan)
2021
The Japanese Society of Gastroenterological Surgery
2021
Hudson Institute
2021
Forestry and Forest Products Research Institute
2014
Waseda University
2010
Hokkaido Agricultural Research Center
2006
Kyushu University
2003-2005
Abstract The lack of a standardized database eddy covariance observations has been an obstacle for data‐driven estimation terrestrial CO 2 fluxes in Asia. In this study, we developed such using 54 sites from various databases by applying consistent postprocessing gross primary productivity (GPP) and net ecosystem exchange (NEE). Data‐driven was conducted machine learning algorithm: support vector regression (SVR), with remote sensing data 2000 to 2015 period. Site‐level evaluation the...
AimsUnderstanding of the ecophysiological dynamics forest canopy photosynthesis and its spatial temporal scaling is crucial for revealing ecological response to climate change. Combined observations analyses plant ecophysiology optical remote sensing would enable us achieve these studies. In order examine utility spectral vegetation indices (VIs) assessing ecosystem-level photosynthesis, we investigated relationships between canopy-scale photosynthetic productivity reflectance over seasons 5...
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...
• Background and Aims Clonal fragments of the rhizomatous dwarf bamboo Sasa palmata, which widely predominates in temperate regions Japan, were grown under heterogeneous resource conditions such as gap understoreys or nutrient-patchy grassland. develop multiple ramets with long rhizomes appear to be physiologically integrated by translocation assimilates. The glasshouse experiment reported here was designed clarify mechanisms physiological integration nitrogen more precisely. Methods To...
We examined the relationship between four vegetation indices and tree canopy phenology in an evergreen coniferous forest Japan based on observations made using a spectral radiometer digital camera at daily time step during 4 year period. The colour of surface Japanese cedar (Cryptomeria japonica) changed from yellowish-green to whitish-green late May July turned reddish-green winter. normalized difference index (NDVI), enhanced (EVI) plant area (PAI) showed no seasonality. In contrast,...
Forest ecosystems sequester large amounts of atmospheric CO2, and the contribution from forests in Asia is not negligible. Previous syntheses carbon fluxes Asian mainly employed estimates eddy covariance measurements, net ecosystem production (NEP), gross primary (GPP), respiration (RE); however, to understand variability within cycles, such as autotropic (AR), (NPP), litterfall, heterotrophic (HR), soil (SR) need be analyzed comprehensively conjunction with NEP, GPP, RE. Here we...
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...
Southeastern Asian tropical rain forests are among the most important biomes in terms of annual productivity and water cycling. How their hydrologic budgets altered by projected shifts precipitation is examined using a combination field measurements, global climate model (GCM) simulation output, simplified model. The developed with its primary forcing term being rainfall statistics. A main novelty this analysis that effects increased (or decreased) on cloud cover hence evapotranspiration...
Southeast Asian tropical rain forests are among the world's most important biomes in terms of global carbon cycling; nevertheless, impact environmental factors on ecosystem CO 2 flux remains poorly understood. One‐dimensional multilayer biosphere‐atmosphere models such as soil‐vegetation‐atmosphere transfer (SVAT) promising tools for understanding how interactions between and leaf‐level physiological parameters might canopy‐level exchange. To examine application SVAT model forests, which is...
Leaf area index (LAI) is a crucial ecological parameter that represents canopy structure and controls many ecosystem functions processes, but direct measurement long-term monitoring of LAI are difficult, especially in forests. An indirect method to estimate the seasonal pattern given forest measure attenuation photosynthetically active radiation (PAR) by then calculate Beer–Lambert law. Use this requires an PAR extinction coefficient (k), needed attenuation. However, determination k itself...
Evaluation of long-term detailed cherry flowering phenology is required for a deep understanding the sensitivity spring to climate change and its effect on cultural ecosystem services. Neodani Usuzumi-zakura ( Cerasus itosakura ) famous tree in Gifu, Japan. On basis decadal information published World Wide Web, we estimated probability distributions year-to-year variability true dates first (FFL), full bloom (FFB), last (LFB), (LFL) from 1924 2024 by applying Bayesian statistical state space...
In order to clarify the basic aerodynamic mechanisms of hovering flight dragonfly, numerical simulations unsteady viscous flow around a tandem wing configuration have been performed using three -dimensional Navier -Stokes code. The are conducted for Anax parthenope julius as typical dragonfly model. total lifting force and specific necessary power predicted by present simulation show close agreement with those observed experimentally code is furth er validated comparing results experimental...