Arid
DOI10.1016/j.jhydrol.2012.06.008
Seasonal snow cover in the Qilian Mountains of Northwest China: Its dependence on oasis seasonal evolution and lowland production of water vapour
Bourque, Charles P. -A.1,2; Mir, Matin A.1
通讯作者Bourque, Charles P. -A.
来源期刊JOURNAL OF HYDROLOGY
ISSN0022-1694
出版年2012
卷号454页码:141-151
英文摘要

Back and forth exchange of water vapour and liquid water from oases at the base of the Qilian Mountains (NW China) and from the Qilian Mountains to oases as surface and shallow subsurface flow has been previously shown by model simulation to be a potentially important mechanism in the long-term stabilisation of oases in westcentral Gansu (Bourque and Hassan, 2009). In a subsequent re-examination of oasis self-support, we use monthly snow-cover patterns in the Qilian Mountains to determine the extent oasis vegetation and evapotranspiration in the low-lying portions of the upper and middle Shiyang and Hei River watersheds control snowfall dynamics in the Qilian Mountains. Monthly snow-cover area (SCA) in the watersheds is simulated with a spatially-distributed model designed to address differences in (i) topography along the prevailing wind direction, (ii) water-vapour production and transport, (iii) in-mountain production of precipitation, and (iv) precipitation phase changes. Seasonal variations in oasis vegetation, surface temperature (for model input), and SCA (for model validation) are described as separate timeseries of monthly composites of enhanced vegetation index, land surface temperature, and normalised difference snow index generated from MODIS optical reflectance and thermal emission data. Comparisons of modelled and snow-index-based estimates of SCA in the Shiyang and Hei River watersheds for the hydrological year, from August 2004 to July 2005, provide nearly similar spatiotemporal patterns; overlap between SCA’s exceeds 60% for most months. An exception to this is in mid-summer of 2004, where overlap between SCA’s is <30%. Agreement between monthly SCA’s reinforces the importance of oasis-vegetation dynamics and mass transfer of water vapour to the atmosphere in guiding seasonal formation of precipitation and snow-cover dynamics in the Qilian Mountains. (C) 2012 Elsevier B.V. All rights reserved.


英文关键词Evapotranspiration Oasis-mountain ecosystems Oasis self-support Precipitation Snow cover area Vegetation dynamics
类型Article
语种英语
国家Canada ; Peoples R China
收录类别SCI-E
WOS记录号WOS:000307154000013
WOS关键词SHIYANG RIVER-BASIN ; WEST-CENTRAL GANSU ; ACCURACY ASSESSMENT ; SPRING WHEAT ; HEIHE RIVER ; GOBI DESERT ; MODIS ; PRECIPITATION ; GROUNDWATER ; VEGETATION
WOS类目Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向Engineering ; Geology ; Water Resources
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/173682
作者单位1.Univ New Brunswick, Fac Forestry & Environm Management, Fredericton, NB E3B 5A3, Canada;
2.Gansu Prov Meteorol Bur, Lanzhou Reg Climate Ctr, Lanzhou 730020, Gansu, Peoples R China
推荐引用方式
GB/T 7714
Bourque, Charles P. -A.,Mir, Matin A.. Seasonal snow cover in the Qilian Mountains of Northwest China: Its dependence on oasis seasonal evolution and lowland production of water vapour[J],2012,454:141-151.
APA Bourque, Charles P. -A.,&Mir, Matin A..(2012).Seasonal snow cover in the Qilian Mountains of Northwest China: Its dependence on oasis seasonal evolution and lowland production of water vapour.JOURNAL OF HYDROLOGY,454,141-151.
MLA Bourque, Charles P. -A.,et al."Seasonal snow cover in the Qilian Mountains of Northwest China: Its dependence on oasis seasonal evolution and lowland production of water vapour".JOURNAL OF HYDROLOGY 454(2012):141-151.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Bourque, Charles P. -A.]的文章
[Mir, Matin A.]的文章
百度学术
百度学术中相似的文章
[Bourque, Charles P. -A.]的文章
[Mir, Matin A.]的文章
必应学术
必应学术中相似的文章
[Bourque, Charles P. -A.]的文章
[Mir, Matin A.]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。