Campus Units

Geological and Atmospheric Sciences, Agronomy, Aerospace Engineering, Ames Laboratory

Document Type

Article

Publication Version

Published Version

Publication Date

10-2001

Journal or Book Title

Bulletin of the American Meteorological Society

Volume

82

Issue

10

First Page

2209

Last Page

2216

DOI

10.1175/1520-0477(2001)082<2209:SIOTAD>2.3.CO;2

Abstract

Analyzing the Global Historical Climatology Network, outgoing longwave radiation, and NCEP–NCAR reanalysis data over the Amazon Basin, the authors find a clear interdecadal increasing trend over the past four decades in both rainfall and intensity of the hydrological cycle. These interdecadal variations are a result of the interdecadal change of the global divergent circulation. On the contrary, the impact of the Amazon deforestation as evaluated by all numerical studies has found a reduction of rainfall and evaporation, and an increase of temperature in the Amazon Basin extending its dry season. Evidently, the interdecadal trend of the basin's hydrological cycle revealed from observations functions in a course opposite to the deforestation scenario. Results of this study suggest that future studies analyzing the impact of the basin–scale deforestation on the regional hydrological cycle and climate should be reassessed with multidecade numerical simulations including both schemes handling the land–surface processes and the mechanism generating proper interdecadal variation of the global divergent circulation.

Comments

This article is published as Chen, Tsing-Chang, Jin-ho Yoon, Kathryn J. St. Croix, and Eugene S. Takle. "Suppressing impacts of the Amazonian deforestation by the global circulation change." Bulletin of the American Meteorological Society 82, no. 10 (2001): 2209-2216. DOI:10.1175/1520-0477(2001)082<2209:SIOTAD>2.3.CO;2. Posted with permission.

Rights

Copyright 2001 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act September 2010 Page 2 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Act (17 USC §108, as revised by P.L. 94-553) does not require the AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a website or in a searchable database, or other uses of this material, except as exempted by the above statement, requires written permission or a license from the AMS. All AMS journals and monograph publications are registered with the Copyright Clearance Center (http://www.copyright.com). Questions about permission to use materials for which AMS holds the copyright can also be directed to the AMS Permissions Officer at permissions@ametsoc.org. Additional details are provided in the AMS Copyright Policy statement, available on the AMS website (http://www.ametsoc.org/CopyrightInformation).

Copyright Owner

American Meteorological Society

Language

en

File Format

application/pdf