Increasing contribution of peatlands to boreal evapotranspiration in a warming climate

被引：128

作者：

Helbig, Manuel ^{[1
,43
]}

Waddington, James Michael ^{[1
]}

Alekseychik, Pavel ^{[2
,3
]}

Amiro, Brian D. ^{[4
]}

Aurela, Mika ^{[5
]}

Barr, Alan G. ^{[6
,7
]}

Black, T. Andrew ^{[8
]}

Blanken, Peter D. ^{[9
]}

Carey, Sean K. ^{[1
]}

Chen, Jiquan ^{[10
]}

Chi, Jinshu ^{[11
]}

Desai, Ankur R. ^{[12
]}

Dunn, Allison ^{[13
]}

Euskirchen, Eugenie S. ^{[14
]}

Flanagan, Lawrence B. ^{[15
]}

Forbrich, Inke ^{[16
]}

Friborg, Thomas ^{[17
]}

Grelle, Achim ^{[18
]}

Harder, Silvie ^{[19
]}

Heliasz, Michal ^{[20
]}

Humphreys, Elyn R. ^{[21
]}

Ikawa, Hiroki ^{[22
]}

Isabelle, Pierre-Erik ^{[23
]}

Iwata, Hiroki ^{[24
]}

Jassal, Rachhpal ^{[8
]}

Korkiakoski, Mika ^{[5
]}

Kurbatova, Juliya ^{[25
]}

Kutzbach, Lars ^{[26
]}

Lindroth, Anders ^{[27
]}

Lofvenius, Mikaell Ottosson ^{[11
]}

Lohila, Annalea ^{[2
,5
]}

Mammarella, Ivan ^{[2
]}

Marsh, Philip ^{[28
]}

Maximov, Trofim ^{[29
]}

Melton, Joe R. ^{[30
]}

Moore, Paul A. ^{[1
]}

Nadeau, Daniel F. ^{[23
]}

Nicholls, Erin M. ^{[1
]}

Nilsson, Mats B. ^{[11
]}

Ohta, Takeshi ^{[31
]}

Peichl, Matthias ^{[11
]}

Petrone, Richard M. ^{[32
]}

Petrov, Roman ^{[29
]}

Prokushkin, Anatoly ^{[33
]}

Quinton, William L. ^{[28
]}

Reed, David E. ^{[10
]}

Roulet, Nigel T. ^{[19
]}

Runkle, Benjamin R. K. ^{[26
,34
]}

Sonnentag, Oliver ^{[35
,36
]}

Strachan, Ian B. ^{[37
]}

机构：

[1] McMaster Univ, Sch Geog & Earth Sci, Hamilton, ON, Canada

[2] Univ Helsinki, Dept Phys, Helsinki, Finland

[3] Nat Resources Inst Finland LUKE, Helsinki, Finland

[4] Univ Manitoba, Dept Soil Sci, Winnipeg, MB, Canada

[5] Finnish Meteorol Inst, Helsinki, Finland

[6] Environm & Climate Change Canada, Climate Res Div, Saskatoon, SK, Canada

[7] Univ Saskatchewan, Global Inst Water Secur, Saskatoon, SK, Canada

[8] Univ British Columbia, Fac Land & Food Syst, Vancouver, BC, Canada

[9] Univ Colorado, Dept Geog, Boulder, CO 80309 USA

[10] Michigan State Univ, Dept Geog Environm & Spatial Sci, E Lansing, MI 48824 USA

[11] Swedish Univ Agr Sci, Dept Forest Ecol & Management, Umea, Sweden

[12] Univ Wisconsin, Dept Atmospher & Ocean Sci, Madison, WI USA

[13] Worcester State Univ, Dept Earth Environm & Phys, Worcester, MA USA

[14] Univ Alaska Fairbanks, Inst Arctic Biol, Fairbanks, AK USA

[15] Univ Lethbridge, Dept Biol Sci, Lethbridge, AB, Canada

[16] Marine Biol Lab, Ecosyst Ctr, Woods Hole, MA 02543 USA

[17] Univ Copenhagen, Dept Geosci & Nat Resource Management, Copenhagen, Denmark

[18] Swedish Univ Agr Sci, Dept Ecol, Uppsala, Sweden

[19] McGill Univ, Dept Geog, Montreal, PQ, Canada

[20] Lund Univ, Ctr Environm & Climate Res, Lund, Sweden

[21] Carleton Univ, Dept Geog & Environm Studies, Ottawa, ON, Canada

[22] Natl Agr & Food Res Org, Inst Agroenvironm Sci, Tsukuba, Ibaraki, Japan

[23] Univ Laval, Dept Genie Civil & Genie Eaux, Quebec City, PQ, Canada

[24] Shinshu Univ, Dept Environm Sci, Matsumoto, Nagano, Japan

[25] Russian Acad Sci, AN Severtsov Inst Ecol & Evolut, Moscow, Russia

[26] Univ Hamburg, Inst Soil Sci, Hamburg, Germany

[27] Lund Univ, Dept Phys Geog & Ecosyst Sci, Lund, Sweden

[28] Wilfrid Laurier Univ, Cold Reg Res Ctr, Waterloo, ON, Canada

[29] Russian Acad Sci, Inst Biol Problems Cryolithozone, Siberian Branch, Yakutsk, Russia

[30] Environm & Climate Change Canada, Climate Res Div, Victoria, BC, Canada

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

[32] Univ Waterloo, Dept Geog & Environm Management, Waterloo, ON, Canada

[33] Russian Acad Sci, Siberian Branch, VN Sukachev Inst Forest, Krasnoyarsk, Russia

[34] Univ Arkansas, Dept Biol & Agr Engn, Fayetteville, AR 72701 USA

[35] Univ Montreal, Dept Geog, Montreal, PQ, Canada

[36] Univ Montreal, Ctr Etud Nord, Montreal, PQ, Canada

[37] McGill Univ, Dept Nat Resource Sci, Sainte Anne De Bellevue, PQ, Canada

[38] Univ Quebec Montreal Geotop, Montreal, PQ, Canada

[39] Univ Eastern Finland, Sch Forest Sci, Joensuu, Finland

[40] Osaka Prefecture Univ, Grad Sch Life & Environm Sci, Sakai, Osaka, Japan

[41] Ernst Moritz Arndt Univ Greifswald, Inst Bot & Landscape Ecol, Greifswald, Germany

[42] Harvard Univ, Dept Earth & Planetary Sci, 20 Oxford St, Cambridge, MA 02138 USA

[43] Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS, Canada

来源：

NATURE CLIMATE CHANGE | 2020年 / 10卷 / 06期

基金：

加拿大自然科学与工程研究理事会; 加拿大创新基金会; 瑞典研究理事会; 美国国家科学基金会; 欧盟地平线“2020”;

关键词：

NET ECOSYSTEM EXCHANGE; ENERGY FLUXES; WATER-TABLE; CARBON LOSS; FOREST; FEEDBACKS; NORTHERN; MOISTURE; SOIL; TRANSPIRATION;

D O I：

10.1038/s41558-020-0763-7

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Climate warming increases evapotranspiration (ET) more in boreal peatlands than in forests. Observations show that peatland ET can exceed forest ET by up to 30%, indicating a stronger warming response in peatlands. Earth system models do not fully account for peatlands and hence may underestimate future boreal ET. The response of evapotranspiration (ET) to warming is of critical importance to the water and carbon cycle of the boreal biome, a mosaic of land cover types dominated by forests and peatlands. The effect of warming-induced vapour pressure deficit (VPD) increases on boreal ET remains poorly understood because peatlands are not specifically represented as plant functional types in Earth system models. Here we show that peatland ET increases more than forest ET with increasing VPD using observations from 95 eddy covariance tower sites. At high VPD of more than 2 kPa, peatland ET exceeds forest ET by up to 30%. Future (2091-2100) mid-growing season peatland ET is estimated to exceed forest ET by over 20% in about one-third of the boreal biome for RCP4.5 and about two-thirds for RCP8.5. Peatland-specific ET responses to VPD should therefore be included in Earth system models to avoid biases in water and carbon cycle projections.

引用

页码：555 / +

页数：12

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