DOI: 10.1002/2017JD027706
Scopus记录号: 2-s2.0-85044260909
论文题名: Recent Acceleration of the Terrestrial Hydrologic Cycle in the U.S. Midwest
作者: Yeh P.J.-F. ; Wu C.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2018
卷: 123, 期: 6 起始页码: 2993
结束页码: 3008
语种: 英语
英文关键词: hydrologic cycle
; intensification
; Midwest
; trend
Scopus关键词: acceleration
; air temperature
; data set
; evaporation
; holistic approach
; hydrological cycle
; precipitation (climatology)
; precipitation assessment
; runoff
; soil moisture
; streamflow
; trend analysis
; water budget
; water level
; Illinois
; Midwest
; Mississippi River
; United States
英文摘要: Most hydroclimatic trend studies considered only a subset of water budget variables; hence, the trend consistency and a holistic assessment of hydrologic changes across the entire water cycle cannot be evaluated. Here we use a unique 31 year (1983–2013) observed data set in Illinois (a representative region of the U.S. Midwest), including temperature (T), precipitation (P), evaporation (E), streamflow (R), soil moisture, and groundwater level (GWL), to estimate the trends and their sensitivity to different data periods and lengths. Both the Mann-Kendall trend test and the least squares linear method identify trends in close agreement. Despite no clear trends during 1983–2013, increasing trends are found in P (8.73–9.05 mm/year), E (6.87–7.47 mm/year), and R (1.57–3.54 mm/year) during 1992–2013, concurrently with a pronounced warming trend of 0.029–0.037 °C/year. However, terrestrial water storageis decreased by −2.0 mm/year (mainly due to declining GWL), suggesting that the increased R is caused by increased surface runoff rather than baseflow. Monthly analyses identify warming trends for all months except winter. In summer, P (E) exhibits an increasing (decreasing) trend, leading to increasing R, soil moisture, GWL, and terrestrial water storage. Most trends estimated for different subperiods are found to be sensitive to data lengths and periods. Overall, this study provides an internally consistent observed evidence on the intensification of the hydrologic cycle in response to recent climate warming in U.S. Midwest, in agreement with and well supported by several recent studies consistently reporting the increased P, R and E over the Midwest and Mississippi River basin. ©2018. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114256
Appears in Collections: 气候减缓与适应
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作者单位: Department of Civil and Environmental Engineering, National University of Singapore, Singapore; Institute of Groundwater and Earth Sciences, Jinan University, Guangzhou, China
Recommended Citation:
Yeh P.J.-F.,Wu C.. Recent Acceleration of the Terrestrial Hydrologic Cycle in the U.S. Midwest[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(6)