Climate change and thresholds of biome shifts in Amazonia

被引：42

作者：

Fernando Salazar, Luis ^{[1
,2
]}

Nobre, Carlos A. ^{[2
]}

机构：

[1] Univ Ind Santander, Escuela Ingn Civil, Bucaramanga, Colombia

[2] Natl Inst Space Res, Ctr Earth Syst Sci, BR-12630000 Cachoeira Paulista, SP, Brazil

来源：

GEOPHYSICAL RESEARCH LETTERS | 2010年 / 37卷

关键词：

ELEVATED CO2; CARBON-CYCLE; DEFORESTATION; DIEBACK;

D O I：

10.1029/2010GL043538

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We examine potential critical thresholds for biome shift in the Amazonian tropical forest by forcing a potential vegetation model with prescribed climate anomalies and projections from global and regional climate models and different levels of CO2 fertilization effect under the SRES A2 scenario (2070-2099). The results indicate that tropical forests might be replaced by seasonal forests or savanna over eastern Amazonia with temperature increases of 2-3 degrees C (4-5 degrees C), when CO2 fertilization effect is not considered (partially considered), depending on precipitation anomaly. A precipitation decrease greater than 30% would trigger the shift from tropical forest to drier biomes, such as savanna and shrubland in southeastern Amazonia. The projected decrease in precipitation during the dry season and the increase of temperature are the main mechanisms driving calculated biome changes. However, biome changes are considerably smaller when the optimum fertilization effect is included. Citation: Salazar, L. F., and C. A. Nobre (2010), Climate change and thresholds of biome shifts in Amazonia, Geo-phys. Res. Lett., 37, L17706, doi:10.1029/2010GL043538.

引用

页数：5

共 38 条

[1] Potential future changes of the terrestrial ecosystem based on climate projections by eight general circulation models [J].

Alo, Clement Aga ;

Wang, Guiling .

JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES, 2008, 113 (G1)

[2] Projecting future fire activity in Amazonia [J].

Cardoso, MF ;

Hurtt, GC ;

Moore, B ;

Nobre, CA ;

Prins, EM .

GLOBAL CHANGE BIOLOGY, 2003, 9 (05) :656-669

[3] Effects of twenty-first-century climate change on the Amazon rain forest [J].

Cook, Kerry H. ;

Vizy, Edward K. .

JOURNAL OF CLIMATE, 2008, 21 (03) :542-560

[4] An overview of results from the Coupled Model Intercomparison Project [J].

Covey, C ;

AchutaRao, KM ;

Cubasch, U ;

Jones, P ;

Lambert, SJ ;

Mann, ME ;

Phillips, TJ ;

Taylor, KE .

GLOBAL AND PLANETARY CHANGE, 2003, 37 (1-2) :103-133

[5] Amazonian forest dieback under climate-carbon cycle projections for the 21st century [J].

Cox, PM ;

Betts, RA ;

Collins, M ;

Harris, PP ;

Huntingford, C ;

Jones, CD .

THEORETICAL AND APPLIED CLIMATOLOGY, 2004, 78 (1-3) :137-156

[6] Global response of terrestrial ecosystem structure and function to CO2 and climate change:: results from six dynamic global vegetation models [J].

Cramer, W ;

Bondeau, A ;

Woodward, FI ;

Prentice, IC ;

Betts, RA ;

Brovkin, V ;

Cox, PM ;

Fisher, V ;

Foley, JA ;

Friend, AD ;

Kucharik, C ;

Lomas, MR ;

Ramankutty, N ;

Sitch, S ;

Smith, B ;

White, A ;

Young-Molling, C .

GLOBAL CHANGE BIOLOGY, 2001, 7 (04) :357-373

[7] A meta-analysis of elevated CO2 effects on woody plant mass, form, and physiology [J].

Curtis, PS ;

Wang, XZ .

OECOLOGIA, 1998, 113 (03) :299-313

[8]

FAO [Food and Agriculture Organization of the United Nations], 1991, DIG SOIL MAP WORLD R

[9] Climatic variability and vegetation vulnerability in Amazonia [J].

Hutyra, LR ;

Munger, JW ;

Nobre, CA ;

Saleska, SR ;

Vieira, SA ;

Wofsy, SC .

GEOPHYSICAL RESEARCH LETTERS, 2005, 32 (24) :1-4

[10] Imprecise probability assessment of tipping points in the climate system [J].

Kriegler, Elmar ;

Hall, Jim W. ;

Held, Hermann ;

Dawson, Richard ;

Schellnhuber, Hans Joachim .

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2009, 106 (13) :5041-5046

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