Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.13748 |
Shifting Pacific storm tracks as stressors to ecosystems of western North America | |
Dannenberg, Matthew P.; Wise, Erika K. | |
2017-11-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2017 |
卷号 | 23期号:11 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Much of the precipitation delivered to western North America arrives during the cool season via midlatitude Pacific storm tracks, which may experience future shifts in response to climate change. Here, we assess the sensitivity of the hydroclimate and ecosystems of western North America to the latitudinal position of cool-season Pacific storm tracks. We calculated correlations between storm track variability and three hydroclimatic variables: gridded cool-season standardized precipitation-evapotranspiration index, April snow water equivalent, and water year streamflow from a network of USGS stream gauges. To assess how historical storm track variability affected ecosystem processes, we derived forest growth estimates from a large network of tree-ring widths and land surface phenology and wildfire estimates from remote sensing. From 1980 to 2014, cool-season storm tracks entered western North America between approximately 41 degrees N and 53 degrees N. Cool-season moisture supply and snowpack responded strongly to storm track position, with positive correlations to storm track latitude in eastern Alaska and northwestern Canada but negative correlations in the northwestern U.S. Ecosystems of the western United States were greener and more productive following winters with south-shifted storm tracks, while Canadian ecosystems were greener in years when the cool-season storm track was shifted to the north. On average, larger areas of the northwestern United States were burned by moderate to high severity wildfires when storm tracks were displaced north, and the average burn area per fire also tended to be higher in years with north-shifted storm tracks. These results suggest that projected shifts of Pacific storm tracks over the 21st century would likely alter hydroclimatic and ecological regimes in western North America, particularly in the northwestern United States, where moisture supply and ecosystem processes are highly sensitive to the position of cool-season storm tracks. |
英文关键词 | climate change drought normalized difference vegetation index phenology primary production remote sensing snow storm tracks tree rings wildfire |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000412322700037 |
WOS关键词 | CLIMATE-CHANGE ; MIDWINTER SUPPRESSION ; PHENOLOGY ; PRECIPITATION ; WILDFIRE ; WATER ; VEGETATION ; STREAMFLOW ; TRENDS ; PRODUCTIVITY |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
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/17565 |
专题 | 气候变化 资源环境科学 |
作者单位 | Univ N Carolina, Dept Geog, Chapel Hill, NC 27514 USA |
推荐引用方式 GB/T 7714 | Dannenberg, Matthew P.,Wise, Erika K.. Shifting Pacific storm tracks as stressors to ecosystems of western North America[J]. GLOBAL CHANGE BIOLOGY,2017,23(11). |
APA | Dannenberg, Matthew P.,&Wise, Erika K..(2017).Shifting Pacific storm tracks as stressors to ecosystems of western North America.GLOBAL CHANGE BIOLOGY,23(11). |
MLA | Dannenberg, Matthew P.,et al."Shifting Pacific storm tracks as stressors to ecosystems of western North America".GLOBAL CHANGE BIOLOGY 23.11(2017). |
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