Reconciliation of top-down and bottom-up CO2 fluxes in Siberian larch forest

被引：11

作者：

Takata, Kumiko ^{[1
,2
]}

Patra, Prabir K. ^{[3
]}

Kotani, Ayumi ^{[4
]}

Mori, Junko ^{[1
,3
,18
]}

Belikov, Dmitry ^{[1
,2
,9
,16
]}

Ichii, Kazuhito ^{[2
,3
,5
]}

Saeki, Tazu ^{[2
,3
]}

Ohta, Takeshi ^{[4
]}

Saito, Kazuyuki ^{[3
]}

Ueyama, Masahito ^{[6
]}

Ito, Akihiko ^{[2
]}

Maksyutov, Shamil ^{[2
]}

Miyazaki, Shin ^{[1
,3
,19
]}

Burke, Eleanor J. ^{[7
]}

Ganshin, Alexander ^{[8
,9
]}

Iijima, Yoshihiro ^{[10
]}

Ise, Takeshi ^{[11
]}

Machiya, Hirokazu ^{[3
]}

Maximov, Trofim C. ^{[12
]}

Niwa, Yosuke ^{[13
]}

O'ishi, Ryo'ta ^{[14
]}

Park, Hotaek ^{[3
]}

Sasai, Takahiro ^{[17
]}

Sato, Hisashi ^{[3
]}

Tei, Shunsuke ^{[16
]}

Zhuravlev, Ruslan ^{[8
,15
]}

Machida, Toshinobu ^{[2
]}

Sugimoto, Atsuko ^{[16
]}

Aoki, Shuji ^{[17
]}

机构：

[1] Natl Inst Polar Res, Tachikawa, Tokyo, Japan

[2] Natl Inst Environm Studies, Tsukuba, Ibaraki, Japan

[3] Japan Agcy Marine Earth Sci & Technol, Yokohama, Kanagawa, Japan

[4] Nagoya Univ, Grad Sch Bioagr Sci, Nagoya, Aichi, Japan

[5] Chiba Univ, Ctr Environm Remote Sensing, Chiba, Japan

[6] Osaka Prefecture Univ, Grad Sch Life & Environm Sci, Sasai, Osaka, Japan

[7] UKMO, Hadley Ctr, Exeter, Devon, England

[8] Cent Aerol Observ, Dolgoprydny, Moscow Reg, Russia

[9] Tomsk State Univ, Tomsk, Russia

[10] Mie Univ, Tsu, Mie, Japan

[11] Kyoto Univ, Field Sci Educ & Res Ctr, Kyoto, Japan

[12] Russian Acad Sci, Siberian Branch, Inst Biol Problems Cryolithozone, Yakutsk, Sakha Republic, Russia

[13] Meteorol Res Inst, Tsukuba, Ibaraki, Japan

[14] Univ Tokyo, Atmosphere & Ocean Res Inst, Tokyo, Japan

[15] Russian Acad Sci, Inst Appl Phys, Nizhnii Novgorod, Russia

[16] Hokkaido Univ, Sapporo, Hokkaido, Japan

[17] Tohoku Univ, Sendai, Miyagi, Japan

[18] Toyo Univ, Chuo Univ, Tokyo, Japan

[19] Sonic Co, Tokyo, Japan

来源：

ENVIRONMENTAL RESEARCH LETTERS | 2017年 / 12卷 / 12期

基金：

俄罗斯科学基金会;

关键词：

net CO2 flux; multi method comparison; Siberian larch forest; seasonal cycle; interannual variation; EDDY COVARIANCE MEASUREMENTS; NORTHERN ECOSYSTEMS; PERMAFROST CARBON; ATMOSPHERIC CO2; CLIMATE; CYCLE; FEEDBACKS; AIRCRAFT; LOSSES; BUDGET;

D O I：

10.1088/1748-9326/aa926d

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Carbon dioxide (CO2) fluxes by different methods vary largely at global, regional and local scales. The net CO2 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 CO2 by all the methods (means during 2004-2007 were 10.9 gCm(-2) month(-1) by TWR, 4.28 gCm(-2) month(-1) by GTM, 5.62 gCm(-2) month(-1) and 0.863 g Cm-2 month(-1) by SVR at two different scales, and 4.89 g Cm-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 Cm-2 month(-1)) than the top-down method (223.6 gCm(-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 fourmethodswithin 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 Cm-2 month(-1)and 34.2 g Cm-2 month(-1)) is more similar to that of the tower observation (42.4 gCm(-2) month(-1)) than those by the biogeochemical models and the large-scale data-driven model (9.5 gCm(-2) month(-1) and 1.45 gCm(-2) month(-1)). The inverse models and tower observations captured a reduction in CO2 uptake after 2008 due to unusual waterlogging.

引用

页数：10

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