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

共 50 条

[1] Peacebuilding, memory and reconciliation: bridging top-down and bottom-up approaches
Clarke, David
EUROPEAN SECURITY, 2012, 21 (04) : 609 - 611
[2] Peacebuilding, Memory and Reconciliation: Bridging Top-Down and Bottom-Up Approaches
Nascimento, Daniela
HUMAN RIGHTS REVIEW, 2015, 16 (03) : 295 - 298
[3] Bottom-up or top-down in dream neuroscience? A top-down critique of two bottom-up studies
Foulkes, David
Domhoff, G. William
CONSCIOUSNESS AND COGNITION, 2014, 27 : 168 - 171
[4] Bottom-up and top-down regulation of decomposition in a tropical forest
Milton, Ysabel
Kaspari, Michael
OECOLOGIA, 2007, 153 (01) : 163 - 172
[5] Bottom-up and top-down regulation of decomposition in a tropical forest
Ysabel Milton
Michael Kaspari
Oecologia, 2007, 153 : 163 - 172
[6] From bottom-up to top-down
Johnston, Hamish
PHYSICS WORLD, 2023, 36 (08) : 35 - 37
[7] Top-down meets bottom-up
不详
R&D MAGAZINE, 2002, 44 (03): : 13 - 13
[8] Top-down or bottom-up assessment?
Kolehmainen, Niina
BRITISH JOURNAL OF OCCUPATIONAL THERAPY, 2010, 73 (05) : 209 - 209
[9] Tying top-down to bottom-up
不详
IEEE COMMUNICATIONS MAGAZINE, 2001, 39 (03) : 72 - 72
[10] Tying top-down to bottom-up
Freemantle, M
CHEMICAL & ENGINEERING NEWS, 2001, 79 (06) : 27 - 29

← 1 2 3 4 5 →