Hydrological Variability in the Arid Region of Northwest China from 2002 to 2013
Joint Authors
Cao, Yanping
Nan, Zhuotong
Cheng, Guodong
Zhang, Ling
Source
Issue
Vol. 2018, Issue 2018 (31 Dec. 2018), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2018-03-29
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
The arid region of Northwest China (ANC) has a distinct and fragile inland water cycle.
This study examined the hydrological variations in ANC and its three subregions from August 2002 to December 2013 by integrating terrestrial water storage (TWS) anomaly data derived from the Gravity Recovery and Climate Experiment (GRACE) satellite, soil moisture data modeled by the Global Land Data Assimilation System, and passive microwave snow water equivalent data.
The results show that the TWS in ANC increased at a rate of 1.7 mm/a over the past decade, which consisted of an increasing trend of precipitation (0.12 mm/a).
Spatially, in the northern ANC, TWS exhibited a significant decreasing trend of −3.64 mm/a (p<0.05) as a result of reduced rainfall, increased glacial meltwater draining away from the mountains, and intensified human activities.
The TWS in southern and eastern ANC increased at a rate of 2.14 (p=0.10) and 1.63 (p<0.01) mm/a, respectively.
In addition to increasing precipitation and temperature, decreasing potential evapotranspiration in Southern Xinjiang and expanding human activities in Hexi-Alashan together led to an overall increase in TWS.
Increased glacier meltwater and permafrost degradation in response to climate warming may also affect the regional TWS balance.
The variations in soil moisture, groundwater, and surface water accounted for the majority of the TWS anomalies in southern and eastern ANC.
The proposed remote sensing approach combining multiple data sources proved applicable and useful to understand the spatiotemporal characteristics of hydrological variability in a large area of arid land without the need for field observations.
American Psychological Association (APA)
Cao, Yanping& Nan, Zhuotong& Cheng, Guodong& Zhang, Ling. 2018. Hydrological Variability in the Arid Region of Northwest China from 2002 to 2013. Advances in Meteorology،Vol. 2018, no. 2018, pp.1-13.
https://search.emarefa.net/detail/BIM-1118609
Modern Language Association (MLA)
Cao, Yanping…[et al.]. Hydrological Variability in the Arid Region of Northwest China from 2002 to 2013. Advances in Meteorology No. 2018 (2018), pp.1-13.
https://search.emarefa.net/detail/BIM-1118609
American Medical Association (AMA)
Cao, Yanping& Nan, Zhuotong& Cheng, Guodong& Zhang, Ling. Hydrological Variability in the Arid Region of Northwest China from 2002 to 2013. Advances in Meteorology. 2018. Vol. 2018, no. 2018, pp.1-13.
https://search.emarefa.net/detail/BIM-1118609
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1118609