Progressive forest canopy water loss during the 2012-2015 California drought

被引：296

作者：

Asner, Gregory P. ^{[1
]}

Brodrick, Philip G. ^{[1
]}

Anderson, Christopher B. ^{[1
]}

Vaughn, Nicholas ^{[1
]}

Knapp, David E. ^{[1
]}

Martin, Roberta E. ^{[1
]}

机构：

[1] Carnegie Inst Sci, Dept Global Ecol, Stanford, CA 94305 USA

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2016年 / 113卷 / 02期

关键词：

canopy water; climate change; drought; forest health; imaging spectroscopy; IMAGING SPECTROSCOPY; STRESS; SPECTROMETER; TRAITS; FIELD;

D O I：

10.1073/pnas.1523397113

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

The 2012-2015 drought has left California with severely reduced snowpack, soil moisture, ground water, and reservoir stocks, but the impact of this estimated millennial-scale event on forest health is unknown. We used airborne laser-guided spectroscopy and satellite-based models to assess losses in canopy water content of California's forests between 2011 and 2015. Approximately 10.6 million ha of forest containing up to 888 million large trees experienced measurable loss in canopy water content during this drought period. Severe canopy water losses of greater than 30% occurred over 1 million ha, affecting up to 58 million large trees. Our measurements exclude forests affected by fire between 2011 and 2015. If drought conditions continue or reoccur, even with temporary reprieves such as El Nino, we predict substantial future forest change.

引用

页码：E249 / E255

页数：7

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