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New data-driven est...
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Ichii, KazuhitoJapan Agency for Marine-Earth Science and Technology,National Institute for Environmental Studies of Japan,Chiba University
(författare)
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
- Artikel/kapitelEngelska2017
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Nummerbeteckningar
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LIBRIS-ID:oai:lup.lub.lu.se:d73171d4-11b1-4b85-a2dc-6225e5df3187
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https://lup.lub.lu.se/record/d73171d4-11b1-4b85-a2dc-6225e5df3187URI
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https://doi.org/10.1002/2016JG003640DOI
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Språk:engelska
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Sammanfattning på:engelska
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Klassifikation
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Ämneskategori:art swepub-publicationtype
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Ämneskategori:ref swepub-contenttype
Anmärkningar
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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 och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Ueyama, MasahitoOsaka Prefecture University
(författare)
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Kondo, MasayukiChiba University,Japan Agency for Marine-Earth Science and Technology
(författare)
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Saigusa, NobukoNational Institute for Environmental Studies of Japan
(författare)
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Kim, JoonSeoul National University
(författare)
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Alberto, Ma CarmelitaInternational Rice Research Institute (IRRI)
(författare)
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Ardö, JonasLund University,Lunds universitet,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science(Swepub:lu)natg-jar
(författare)
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Euskirchen, Eugénie S.University of Alaska Fairbanks
(författare)
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Kang, MinseokSeoul National University
(författare)
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Hirano, TakashiHokkaido University
(författare)
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Joiner, JoannaNASA Goddard Space Flight Center
(författare)
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Kobayashi, HidekiJapan Agency for Marine-Earth Science and Technology
(författare)
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Marchesini, Luca BelelliFar Eastern Federal University,Vrije Universiteit Amsterdam
(författare)
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Merbold, LutzETH Zürich,International Livestock Research Institute Nairobi
(författare)
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Miyata, AkiraInstitute for Agro-Environmental Sciences, NARO
(författare)
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Saitoh, Taku M.Gifu University
(författare)
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Takagi, KentaroHokkaido University
(författare)
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Varlagin, AndrejSevertsov Institute of Ecology and Evolution, Russian Academy of Sciences
(författare)
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Bret-Harte, M. SyndoniaUniversity of Alaska Fairbanks
(författare)
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Kitamura, KenzoForestry and Forest Products Research Institute
(författare)
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Kosugi, YoshikoKyoto University
(författare)
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Kotani, AyumiNagoya University
(författare)
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Kumar, KireetG. B. Pant National Institute of Himalayan Environment and Sustainable Development
(författare)
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Li, Sheng GongInstitute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences
(författare)
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Machimura, TakashiOsaka University
(författare)
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Matsuura, YojiroForestry and Forest Products Research Institute
(författare)
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Mizoguchi, YasukoForestry and Forest Products Research Institute
(författare)
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Ohta, TakeshiNagoya University
(författare)
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Mukherjee, SandipanG. B. Pant National Institute of Himalayan Environment and Sustainable Development
(författare)
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Yanagi, YujiJapan Agency for Marine-Earth Science and Technology
(författare)
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Yasuda, YukioForestry and Forest Products Research Institute
(författare)
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Zhang, YipingChinese Academy of Sciences
(författare)
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Zhao, FenghuaInstitute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences
(författare)
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Japan Agency for Marine-Earth Science and TechnologyNational Institute for Environmental Studies of Japan
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Journal of Geophysical Research - Biogeosciences122:4, s. 767-7952169-8953
Internetlänk
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Till lärosätets databas
- Av författaren/redakt...
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Ichii, Kazuhito
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Ueyama, Masahito
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Kondo, Masayuki
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Saigusa, Nobuko
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Kim, Joon
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Alberto, Ma Carm ...
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visa fler...
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Ardö, Jonas
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Euskirchen, Eugé ...
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Kang, Minseok
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Hirano, Takashi
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Joiner, Joanna
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Kobayashi, Hidek ...
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Marchesini, Luca ...
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Merbold, Lutz
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Miyata, Akira
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Saitoh, Taku M.
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Takagi, Kentaro
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Varlagin, Andrej
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Bret-Harte, M. S ...
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Kitamura, Kenzo
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Kosugi, Yoshiko
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Kotani, Ayumi
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Kumar, Kireet
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Li, Sheng Gong
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Machimura, Takas ...
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Matsuura, Yojiro
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Mizoguchi, Yasuk ...
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Ohta, Takeshi
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Mukherjee, Sandi ...
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Yanagi, Yuji
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Yasuda, Yukio
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Zhang, Yiping
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Zhao, Fenghua
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