Reconciliation of top-down and bottom-up CO2 fluxes in Siberian larch forest
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, IN...
Published in: | Environmental Research Letters |
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Online Access: | https://doi.org/10.1088/1748-9326/aa926d https://doaj.org/article/5d10d2c878fa41139e6562ab91ccdf23 |
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ftdoajarticles:oai:doaj.org/article:5d10d2c878fa41139e6562ab91ccdf23 2023-09-05T13:23:59+02:00 Reconciliation of top-down and bottom-up CO2 fluxes in Siberian larch forest Kumiko Takata Prabir K Patra Ayumi Kotani Junko Mori Dmitry Belikov Kazuhito Ichii Tazu Saeki Takeshi Ohta Kazuyuki Saito Masahito Ueyama Akihiko Ito Shamil Maksyutov Shin Miyazaki Eleanor J Burke Alexander Ganshin Yoshihiro Iijima Takeshi Ise Hirokazu Machiya Trofim C Maximov Yosuke Niwa Ryo’ta O’ishi Hotaek Park Takahiro Sasai Hisashi Sato Shunsuke Tei Ruslan Zhuravlev Toshinobu Machida Atsuko Sugimoto Shuji Aoki 2017-01-01T00:00:00Z https://doi.org/10.1088/1748-9326/aa926d https://doaj.org/article/5d10d2c878fa41139e6562ab91ccdf23 EN eng IOP Publishing https://doi.org/10.1088/1748-9326/aa926d https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/aa926d 1748-9326 https://doaj.org/article/5d10d2c878fa41139e6562ab91ccdf23 Environmental Research Letters, Vol 12, Iss 12, p 125012 (2017) net CO2 flux multi method comparison Siberian larch forest seasonal cycle interannual variation Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 article 2017 ftdoajarticles https://doi.org/10.1088/1748-9326/aa926d 2023-08-13T00:37:31Z 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 around Yakutsk shows a net sink of CO _2 by all the methods (means during 2004–2007 were 10.9 g C m ^−2 month ^−1 by TWR, 4.28 g C m ^−2 month ^−1 by GTM, 5.62 g C m ^−2 month ^−1 and 0.863 g C m ^−2 month ^−1 by SVR at two different scales, and 4.89 g C m ^−2 month ^−1 by INV). Absorption in summer (June–August) was smaller by three bottom-up methods (ranged from 88.1 to 191.8 g C m ^−2 month ^−1 ) than the top-down method (223.6 g C m ^−2 month ^−1 ). Thus the peak-to-trough amplitude of the seasonal cycle is greater for the inverse models than bottom-up methods. The monthly-mean seasonal cycles agree among the four methods within the range of inter-model variations. The interannual variability estimated by an ensemble of inverse models and a site-scale data-driven model (the max-min range was 35.8 g C m ^−2 month ^−1 and 34.2 g C m ^−2 month ^−1 ) is more similar to that of the tower observation (42.4 g C m ^−2 month ^−1 ) than those by the biogeochemical models and the large-scale data-driven model (9.5 g C m ^−2 month ^−1 and 1.45 g C m ^−2 month ^−1 ). The inverse models and tower observations captured a reduction in CO _2 uptake after 2008 due to unusual waterlogging. Article in Journal/Newspaper Yakutsk Siberia Directory of Open Access Journals: DOAJ Articles Yakutsk Environmental Research Letters 12 12 125012 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
net CO2 flux multi method comparison Siberian larch forest seasonal cycle interannual variation Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
spellingShingle |
net CO2 flux multi method comparison Siberian larch forest seasonal cycle interannual variation Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 Kumiko Takata Prabir K Patra Ayumi Kotani Junko Mori Dmitry Belikov Kazuhito Ichii Tazu Saeki Takeshi Ohta Kazuyuki Saito Masahito Ueyama Akihiko Ito Shamil Maksyutov Shin Miyazaki Eleanor J Burke Alexander Ganshin Yoshihiro Iijima Takeshi Ise Hirokazu Machiya Trofim C Maximov Yosuke Niwa Ryo’ta O’ishi Hotaek Park Takahiro Sasai Hisashi Sato Shunsuke Tei Ruslan Zhuravlev Toshinobu Machida Atsuko Sugimoto Shuji Aoki Reconciliation of top-down and bottom-up CO2 fluxes in Siberian larch forest |
topic_facet |
net CO2 flux multi method comparison Siberian larch forest seasonal cycle interannual variation Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
description |
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 around Yakutsk shows a net sink of CO _2 by all the methods (means during 2004–2007 were 10.9 g C m ^−2 month ^−1 by TWR, 4.28 g C m ^−2 month ^−1 by GTM, 5.62 g C m ^−2 month ^−1 and 0.863 g C m ^−2 month ^−1 by SVR at two different scales, and 4.89 g C m ^−2 month ^−1 by INV). Absorption in summer (June–August) was smaller by three bottom-up methods (ranged from 88.1 to 191.8 g C m ^−2 month ^−1 ) than the top-down method (223.6 g C m ^−2 month ^−1 ). Thus the peak-to-trough amplitude of the seasonal cycle is greater for the inverse models than bottom-up methods. The monthly-mean seasonal cycles agree among the four methods within the range of inter-model variations. The interannual variability estimated by an ensemble of inverse models and a site-scale data-driven model (the max-min range was 35.8 g C m ^−2 month ^−1 and 34.2 g C m ^−2 month ^−1 ) is more similar to that of the tower observation (42.4 g C m ^−2 month ^−1 ) than those by the biogeochemical models and the large-scale data-driven model (9.5 g C m ^−2 month ^−1 and 1.45 g C m ^−2 month ^−1 ). The inverse models and tower observations captured a reduction in CO _2 uptake after 2008 due to unusual waterlogging. |
format |
Article in Journal/Newspaper |
author |
Kumiko Takata Prabir K Patra Ayumi Kotani Junko Mori Dmitry Belikov Kazuhito Ichii Tazu Saeki Takeshi Ohta Kazuyuki Saito Masahito Ueyama Akihiko Ito Shamil Maksyutov Shin Miyazaki Eleanor J Burke Alexander Ganshin Yoshihiro Iijima Takeshi Ise Hirokazu Machiya Trofim C Maximov Yosuke Niwa Ryo’ta O’ishi Hotaek Park Takahiro Sasai Hisashi Sato Shunsuke Tei Ruslan Zhuravlev Toshinobu Machida Atsuko Sugimoto Shuji Aoki |
author_facet |
Kumiko Takata Prabir K Patra Ayumi Kotani Junko Mori Dmitry Belikov Kazuhito Ichii Tazu Saeki Takeshi Ohta Kazuyuki Saito Masahito Ueyama Akihiko Ito Shamil Maksyutov Shin Miyazaki Eleanor J Burke Alexander Ganshin Yoshihiro Iijima Takeshi Ise Hirokazu Machiya Trofim C Maximov Yosuke Niwa Ryo’ta O’ishi Hotaek Park Takahiro Sasai Hisashi Sato Shunsuke Tei Ruslan Zhuravlev Toshinobu Machida Atsuko Sugimoto Shuji Aoki |
author_sort |
Kumiko Takata |
title |
Reconciliation of top-down and bottom-up CO2 fluxes in Siberian larch forest |
title_short |
Reconciliation of top-down and bottom-up CO2 fluxes in Siberian larch forest |
title_full |
Reconciliation of top-down and bottom-up CO2 fluxes in Siberian larch forest |
title_fullStr |
Reconciliation of top-down and bottom-up CO2 fluxes in Siberian larch forest |
title_full_unstemmed |
Reconciliation of top-down and bottom-up CO2 fluxes in Siberian larch forest |
title_sort |
reconciliation of top-down and bottom-up co2 fluxes in siberian larch forest |
publisher |
IOP Publishing |
publishDate |
2017 |
url |
https://doi.org/10.1088/1748-9326/aa926d https://doaj.org/article/5d10d2c878fa41139e6562ab91ccdf23 |
geographic |
Yakutsk |
geographic_facet |
Yakutsk |
genre |
Yakutsk Siberia |
genre_facet |
Yakutsk Siberia |
op_source |
Environmental Research Letters, Vol 12, Iss 12, p 125012 (2017) |
op_relation |
https://doi.org/10.1088/1748-9326/aa926d https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/aa926d 1748-9326 https://doaj.org/article/5d10d2c878fa41139e6562ab91ccdf23 |
op_doi |
https://doi.org/10.1088/1748-9326/aa926d |
container_title |
Environmental Research Letters |
container_volume |
12 |
container_issue |
12 |
container_start_page |
125012 |
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1776204564432683008 |