DOI: 10.5194/hess-21-6379-2017
Scopus记录号: 2-s2.0-85038634992
论文题名: The atmospheric branch of the hydrological cycle over the Indus, Ganges, and Brahmaputra river basins
作者: Sorí R ; , Nieto R ; , Drumond A ; , Vicente-Serrano S ; M ; , Gimeno L
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2017
卷: 21, 期: 12 起始页码: 6379
结束页码: 6399
语种: 英语
Scopus关键词: Barium compounds
; Budget control
; Precipitation (meteorology)
; Watersheds
; 3-dimensional modeling
; Brahmaputra River
; Hydrological cycles
; Moisture sources
; Moisture uptake
; Monsoonal precipitation
; Precipitation regimes
; Vertical columns
; Moisture
; estuarine front
; hydrological cycle
; precipitation (climatology)
; rainfall
; river basin
; westerly
; Bay of Bengal
; Brahmaputra River
; Ganges River
; Indian Ocean
; Indian Ocean
; Indus River
; South Asia
英文摘要: The atmospheric branch of the hydrological cycle over the Indus, Ganges, and Brahmaputra river basins (IRB, GRB, and BRB respectively) in the South Asian region was investigated. The 3-dimensional model FLEXPART v9.0 was utilized. An important advantage of this model is that it permits the computation of the freshwater budget on air parcel trajectories both backward and forward in time from 0.1 to 1000ĝ€hPa in the atmospheric vertical column. The analysis was conducted for the westerly precipitation regime (WPR) (November-April) and the monsoonal precipitation regime (MPR) (May-October) in the period from 1981 to 2015. The main terrestrial and oceanic climatological moisture sources for the IRB, GRB, and BRB and their contribution to precipitation over the basins were identified. For the three basins, the most important moisture sources for precipitation are (i) in the continental regions, the land masses to the west of the basins (in this case called western Asia), the Indian region (IR), and the basin itself, and (ii) from the ocean, the utmost sources being the Indian Ocean (IO) and the Bay of Bengal (BB), and it is remarkable that despite the amount of moisture reaching the Indus and Ganges basins from land sources, the moisture supply from the IO seems to be first associated with the rapid increase or decrease in precipitation over the sources in the MPR. The technique of the composites was used to analyse how the moisture uptake values spatially vary from the sources (the budget of evaporation minus precipitation (E ĝ' P ) was computed in a backward experiment from the basins) but during the pre-onset and pre-demise dates of the monsoonal rainfall over each basin; this confirmed that over the last days of the monsoon at the basins, the moisture uptake areas decrease in the IO. The Indian region, the Indian Ocean, the Bay of Bengal, and the basins themselves are the main sources of moisture responsible for negative (positive) anomalies of moisture contribution to the basins during composites of driest (wettest) WPR and MPR. © Author(s) 2017. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78963
Appears in Collections: 气候变化事实与影响
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作者单位: Environmental Physics Laboratory (EphysLab), Universidade de Vigo, Ourense, Spain; Department of Atmospheric Sciences, Institute of Astronomy, Geophysics and Atmospheric Sciences, University of SãoPaulo, São Paulo, Brazil; Instituto Pirenaico de Ecología, Consejo Superior de Investigaciones Científicas (IPE-CSIC), Zaragoza, Spain
Recommended Citation:
Sorí R,, Nieto R,, Drumond A,et al. The atmospheric branch of the hydrological cycle over the Indus, Ganges, and Brahmaputra river basins[J]. Hydrology and Earth System Sciences,2017-01-01,21(12)