Masahito Ueyama

Dados Biográficos

ID6820604
NOMEMasahito Ueyama
PRENOMESMasahito
SOBRENOMEUeyama
ASSINATURAUEYAMA M
AFILIAÇÕESOsaka Prefecture University
ORCID0000-0002-4000-4888
VERIFICADOSim
TOTAL DE OBRAS7
TOTAL DE CITAÇÕES0
TOTAL COMO AUTOR7
TOTAL COMO EDITOR0
PRIMEIRO ANO DE PUBLICAÇÃO2017
ANO MAIS RECENTE DE PUBLICAÇÃO2025
ÍNDICE H0

  • Exploring the optimal geometry of satellites Himawari-8/9 to monitor seasonal variation in vegetation dynamics across Southeast Asia

    Open AccessMisaki Hase, Kazuhito Ichii et al.ARTICLEEnvironmental Research Letters2025

    Dense and widespread tropical rainforests across Southeast Asia are crucial for the global carbon cycle. A new generation geostationary satellite, Himawari-8/9, and onboard sensor, the Advanced Himawari Imager (AHI), enables hyper-temporal vegetation monitoring in this cloud-prone region. However, AHI’s fixed viewing geometry varies spatially, making consistent vegetation monitoring challenging across a wide area at a seasonal scale. This study e…

  • A boreal forest model benchmarking dataset for North America

    Open AccessBo Qu, Alexandre Roy et al.ARTICLEEnvironmental Research Letters2023

    Climate change is rapidly altering composition, structure, and functioning of the boreal biome, across North America often broadly categorized into ecoregions. The resulting complex changes in different ecoregions present a challenge for efforts to accurately simulate carbon dioxide (CO 2 ) and energy exchanges between boreal forests and the atmosphere with terrestrial ecosystem models (TEMs). Eddy covariance measurements provide valuable informa…

  • Soil respiration strongly offsets carbon uptake in Alaska and Northwest Canada

    Open AccessJennifer D Watts, Susan M Natali et al.ARTICLEEnvironmental Research Letters2021

    Soil respiration (i.e. from soils and roots) provides one of the largest global fluxes of carbon dioxide (CO 2 ) to the atmosphere and is likely to increase with warming, yet the magnitude of soil respiration from rapidly thawing Arctic-boreal regions is not well understood. To address this knowledge gap, we first compiled a new CO 2 flux database for permafrost-affected tundra and boreal ecosystems in Alaska and Northwest Canada. We then used th…

  • Shallow soils are warmer under trees and tall shrubs across Arctic and Boreal ecosystems

    Open AccessHeather Kropp, M M Loranty et al.ARTICLEEnvironmental Research Letters2020

    Soils are warming as air temperatures rise across the Arctic and Boreal region concurrent with the expansion of tall-statured shrubs and trees in the tundra. Changes in vegetation structure and function are expected to alter soil thermal regimes, thereby modifying climate feedbacks related to permafrost thaw and carbon cycling. However, current understanding of vegetation impacts on soil temperature is limited to local or regional scales and lack…

  • The biophysical climate mitigation potential of boreal peatlands during the growing season

    Open AccessManuel Helbig, J M Waddington et al.ARTICLEEnvironmental Research Letters2020

    Peatlands and forests cover large areas of the boreal biome and are critical for global climate regulation. They also regulate regional climate through heat and water vapour exchange with the atmosphere. Understanding how land-atmosphere interactions in peatlands differ from forests may therefore be crucial for modelling boreal climate system dynamics and for assessing climate benefits of peatland conservation and restoration. To assess the bioph…

  • Inferring CO 2 fertilization effect based on global monitoring land-atmosphere exchange with a theoretical model

    Open AccessMasahito Ueyama, Kazuhito Ichii et al.ARTICLEEnvironmental Research Letters2020

    Rising atmospheric CO 2 concentration ([CO 2 ]) enhances photosynthesis and reduces transpiration at the leaf, ecosystem, and global scale via the CO 2 fertilization effect. The CO 2 fertilization effect is among the most important processes for predicting the terrestrial carbon budget and future climate, yet it has been elusive to quantify. For evaluating the CO 2 fertilization effect on land photosynthesis and transpiration, we developed a tech…

  • Reconciliation of top-down and bottom-up CO 2 fluxes in Siberian larch forest

    Open AccessKumiko Takata, Prabir K Patra et al.ARTICLEEnvironmental Research Letters2017

    Carbon dioxide (CO _2 ) fluxes by different methods vary largely at global, regional and local scales. The net CO _2 fluxes by three bottom-up methods (tower observation (TWR), biogeochemical models (GTM), and a data-driven model (SVR)), and an ensemble of atmospheric inversions (top-down method, INV) are compared in Yakutsk, Siberia for 2004–2013. The region is characterized by highly homogeneous larch forest on a flat terrain. The ecosystem aro…