Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016JD025855 |
Historic and projected changes in vapor pressure deficit suggest a continental-scale drying of the United States atmosphere | |
Ficklin, Darren L.1; Novick, Kimberly A.2 | |
2017-02-27 | |
发表期刊 | JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
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ISSN | 2169-897X |
EISSN | 2169-8996 |
出版年 | 2017 |
卷号 | 122期号:4 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Via air temperature increases and relative humidity changes, climate change will modify vapor pressure deficit (VPD), which is an important determinant of water vapor and CO2 exchange between the land surface and atmosphere. VPD is the difference between the water vapor the air can hold at saturation (e(s)) and the actual amount of water vapor (e(a)). Here we assess changes in VPD, e(s), and e(a) in the United States (U.S.) for the recent past (1979-2013) and the future (2065-2099) using gridded, observed climate data and output from general circulation models. Historically, VPD has increased for all seasons, driven by increases in e(s) and declines in e(a). The spring, summer, and fall seasons exhibited the largest areal extent of significant increases in VPD, which was largely concentrated in the western and southern portions of the U.S. The changes in VPD stemmed from recent air temperature increases and relative humidity decreases. Projections indicate similar, amplified patterns into the future. For the summer, the general circulation model ensemble median showed a 51% projected increase (quartile range of 39 and 64%) in summer VPD for the U.S., reflecting temperature-driven increases in e(s) but decreases or minimal changes in relative humidity that promotes negligible changes in e(a). Using a simple model for plant hydraulic functioning, we also show that in the absence of stomatal acclimation, future changes in VPD can reduce stomatal conductance by 9-51%, which is a magnitude comparable to the expected decline in stomatal conductance from rising CO2. |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000396121200001 |
WOS关键词 | HYDROLOGICALLY BASED DATASET ; LAND-SURFACE FLUXES ; STOMATAL CONDUCTANCE ; TEMPERATURE TRENDS ; WATER TRANSPORT ; MOISTURE DEMAND ; BIAS CORRECTION ; TREE MORTALITY ; CLIMATE-CHANGE ; PRECIPITATION |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/33572 |
专题 | 气候变化 |
作者单位 | 1.Indiana Univ, Dept Geog, Bloomington, IN 47405 USA; 2.Indiana Univ, Sch Publ & Environm Affairs, Bloomington, IN USA |
推荐引用方式 GB/T 7714 | Ficklin, Darren L.,Novick, Kimberly A.. Historic and projected changes in vapor pressure deficit suggest a continental-scale drying of the United States atmosphere[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2017,122(4). |
APA | Ficklin, Darren L.,&Novick, Kimberly A..(2017).Historic and projected changes in vapor pressure deficit suggest a continental-scale drying of the United States atmosphere.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,122(4). |
MLA | Ficklin, Darren L.,et al."Historic and projected changes in vapor pressure deficit suggest a continental-scale drying of the United States atmosphere".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 122.4(2017). |
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