Field information links permafrost carbon to physical vulnerabilities of thawing

被引：226

作者：

Harden, Jennifer W. ^{[1
]}

Koven, Charles D. ^{[2
]}

Ping, Chien-Lu ^{[3
]}

Hugelius, Gustaf ^{[4
]}

McGuire, A. David ^{[5
]}

Camill, Phillip ^{[6
,7
]}

Jorgenson, Torre ^{[8
]}

Kuhry, Peter ^{[4
]}

Michaelson, Gary J. ^{[3
]}

O'Donnell, Jonathan A. ^{[9
]}

Schuur, Edward A. G. ^{[10
]}

Tarnocai, Charles ^{[11
]}

Johnson, Kristopher ^{[12
]}

Grosse, Guido ^{[13
]}

机构：

[1] US Geol Survey, Menlo Pk, CA 94025 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[3] Univ Alaska Fairbanks, Palmer Res Ctr, Fairbanks, AK USA

[4] Stockholm Univ, Dept Phys Geog & Quaternary Geol, S-10691 Stockholm, Sweden

[5] Univ Alaska Fairbanks, Alaska Cooperat Fish & Wildlife Res Unit, Fairbanks, AK USA

[6] Bowdoin Coll, Environm Studies Program, Brunswick, ME 04011 USA

[7] Bowdoin Coll, Dept Earth & Oceanog Sci, Brunswick, ME 04011 USA

[8] Alaska Ecosci, Fairbanks, AK USA

[9] US Geol Survey, Boulder, CO USA

[10] Univ Florida, Dept Biol, Gainesville, FL USA

[11] Agr & Agri Food Canada, Ottawa, ON, Canada

[12] USDA, Forest Serv, Newtown Sq, PA USA

[13] Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2012年 / 39卷

基金：

美国国家科学基金会; 瑞典研究理事会;

关键词：

SOIL ORGANIC-CARBON; TEMPERATURE; DYNAMICS; TUNDRA; PEAT; DECOMPOSITION; PRODUCTIVITY; STORAGE;

D O I：

10.1029/2012GL051958

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Deep soil profiles containing permafrost (Gelisols) were characterized for organic carbon (C) and total nitrogen (N) stocks to 3 m depths. Using the Community Climate System Model (CCSM4) we calculate cumulative distributions of active layer thickness (ALT) under current and future climates. The difference in cumulative ALT distributions over time was multiplied by C and N contents of soil horizons in Gelisol suborders to calculate newly thawed C and N. Thawing ranged from 147 PgC with 10 PgN by 2050 (representative concentration pathway RCP scenario 4.5) to 436 PgC with 29 PgN by 2100 (RCP 8.5). Organic horizons that thaw are vulnerable to combustion, and all horizon types are vulnerable to shifts in hydrology and decomposition. The rates and extent of such losses are unknown and can be further constrained by linking field and modelling approaches. These changes have the potential for strong additional loading to our atmosphere, water resources, and ecosystems. Citation: Harden, J. W., et al. (2012), Field information links permafrost carbon to physical vulnerabilities of thawing, Geophys. Res. Lett., 39, L15704, doi: 10.1029/2012GL051958.

引用

页数：6

共 41 条

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