Sökning: WFRF:(Kotani Ayumi) >
New data-driven est...
New data-driven estimation of terrestrial CO2 fluxes in Asia using a standardized database of eddy covariance measurements, remote sensing data, and support vector regression
-
- Ichii, Kazuhito (författare)
- National Institute for Environmental Studies of Japan,Chiba University,Japan Agency for Marine-Earth Science and Technology
-
- Ueyama, Masahito (författare)
- Osaka Prefecture University
-
- Kondo, Masayuki (författare)
- Chiba University,Japan Agency for Marine-Earth Science and Technology
-
visa fler...
-
- Saigusa, Nobuko (författare)
- National Institute for Environmental Studies of Japan
-
- Kim, Joon (författare)
- Seoul National University
-
- Alberto, Ma Carmelita (författare)
- International Rice Research Institute (IRRI)
-
- Ardö, Jonas (författare)
- Lund University,Lunds universitet,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science
-
- Euskirchen, Eugénie S. (författare)
- University of Alaska Fairbanks
-
- Kang, Minseok (författare)
- Seoul National University
-
- Hirano, Takashi (författare)
- Hokkaido University
-
- Joiner, Joanna (författare)
- NASA Goddard Space Flight Center
-
- Kobayashi, Hideki (författare)
- Japan Agency for Marine-Earth Science and Technology
-
- Marchesini, Luca Belelli (författare)
- Far Eastern Federal University,Vrije Universiteit Amsterdam
-
- Merbold, Lutz (författare)
- International Livestock Research Institute Nairobi,ETH Zürich
-
- Miyata, Akira (författare)
- Institute for Agro-Environmental Sciences, NARO
-
- Saitoh, Taku M. (författare)
- Gifu University
-
- Takagi, Kentaro (författare)
- Hokkaido University
-
- Varlagin, Andrej (författare)
- Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences
-
- Bret-Harte, M. Syndonia (författare)
- University of Alaska Fairbanks
-
- Kitamura, Kenzo (författare)
- Forestry and Forest Products Research Institute
-
- Kosugi, Yoshiko (författare)
- Kyoto University
-
- Kotani, Ayumi (författare)
- Nagoya University
-
- Kumar, Kireet (författare)
- G. B. Pant National Institute of Himalayan Environment and Sustainable Development
-
- Li, Sheng Gong (författare)
- Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences
-
- Machimura, Takashi (författare)
- Osaka University
-
- Matsuura, Yojiro (författare)
- Forestry and Forest Products Research Institute
-
- Mizoguchi, Yasuko (författare)
- Forestry and Forest Products Research Institute
-
- Ohta, Takeshi (författare)
- Nagoya University
-
- Mukherjee, Sandipan (författare)
- G. B. Pant National Institute of Himalayan Environment and Sustainable Development
-
- Yanagi, Yuji (författare)
- Japan Agency for Marine-Earth Science and Technology
-
- Yasuda, Yukio (författare)
- Forestry and Forest Products Research Institute
-
- Zhang, Yiping (författare)
- Chinese Academy of Sciences
-
- Zhao, Fenghua (författare)
- Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences
-
visa färre...
-
(creator_code:org_t)
- 2017
- 2017
- Engelska.
-
Ingår i: Journal of Geophysical Research - Biogeosciences. - 2169-8953. ; 122:4, s. 767-795
- Relaterad länk:
-
http://dx.doi.org/10...
-
visa fler...
-
https://lup.lub.lu.s...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- The lack of a standardized database of eddy covariance observations has been an obstacle for data-driven estimation of terrestrial CO2 fluxes in Asia. In this study, we developed such a standardized database using 54 sites from various databases by applying consistent postprocessing for data-driven estimation of gross primary productivity (GPP) and net ecosystem CO2 exchange (NEE). Data-driven estimation was conducted by using a machine learning algorithm: support vector regression (SVR), with remote sensing data for 2000 to 2015 period. Site-level evaluation of the estimated CO2 fluxes shows that although performance varies in different vegetation and climate classifications, GPP and NEE at 8days are reproduced (e.g., r2=0.73 and 0.42 for 8day GPP and NEE). Evaluation of spatially estimated GPP with Global Ozone Monitoring Experiment 2 sensor-based Sun-induced chlorophyll fluorescence shows that monthly GPP variations at subcontinental scale were reproduced by SVR (r2=1.00, 0.94, 0.91, and 0.89 for Siberia, East Asia, South Asia, and Southeast Asia, respectively). Evaluation of spatially estimated NEE with net atmosphere-land CO2 fluxes of Greenhouse Gases Observing Satellite (GOSAT) Level 4A product shows that monthly variations of these data were consistent in Siberia and East Asia; meanwhile, inconsistency was found in South Asia and Southeast Asia. Furthermore, differences in the land CO2 fluxes from SVR-NEE and GOSAT Level 4A were partially explained by accounting for the differences in the definition of land CO2 fluxes. These data-driven estimates can provide a new opportunity to assess CO2 fluxes in Asia and evaluate and constrain terrestrial ecosystem models.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Klimatforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Climate Research (hsv//eng)
Nyckelord
- Asia
- Data-driven model
- Eddy covariance data
- Remote sensing
- Terrestrial CO flux
- Upscaling
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
Hitta via bibliotek
Till lärosätets databas
- Av författaren/redakt...
-
Ichii, Kazuhito
-
Ueyama, Masahito
-
Kondo, Masayuki
-
Saigusa, Nobuko
-
Kim, Joon
-
Alberto, Ma Carm ...
-
visa fler...
-
Ardö, Jonas
-
Euskirchen, Eugé ...
-
Kang, Minseok
-
Hirano, Takashi
-
Joiner, Joanna
-
Kobayashi, Hidek ...
-
Marchesini, Luca ...
-
Merbold, Lutz
-
Miyata, Akira
-
Saitoh, Taku M.
-
Takagi, Kentaro
-
Varlagin, Andrej
-
Bret-Harte, M. S ...
-
Kitamura, Kenzo
-
Kosugi, Yoshiko
-
Kotani, Ayumi
-
Kumar, Kireet
-
Li, Sheng Gong
-
Machimura, Takas ...
-
Matsuura, Yojiro
-
Mizoguchi, Yasuk ...
-
Ohta, Takeshi
-
Mukherjee, Sandi ...
-
Yanagi, Yuji
-
Yasuda, Yukio
-
Zhang, Yiping
-
Zhao, Fenghua
-
visa färre...
- Om ämnet
-
- NATURVETENSKAP
-
NATURVETENSKAP
-
och Geovetenskap och ...
-
och Klimatforskning
- Artiklar i publikationen
-
Journal of Geoph ...
- Av lärosätet
-
Lunds universitet