气候变化领域集成服务门户(CCPortal): Integrated simulation of snow and glacier melt in water and energy balance-based, distributed hydrological modeling framework at Hunza River Basin of Pakistan Karakoram region

CCPortal

DOI	10.1002/2014JD022666
	Integrated simulation of snow and glacier melt in water and energy balance-based, distributed hydrological modeling framework at Hunza River Basin of Pakistan Karakoram region
	Shrestha, Maheswor; Koike, Toshio; Hirabayashi, Yukiko; Xue, Yongkang; Wang, Lei; Rasul, Ghulam; Ahmad, Bashir
通讯作者	Shrestha, M (通讯作者)
发表日期	2015
ISSN	2169-897X
EISSN	2169-8996
起始页码	4889
结束页码	4919
卷号	120 期号:10
英文摘要	Energy budget-based distributed modeling of snow and glacier melt runoff is essential in a hydrologic model to accurately describe hydrologic processes in cold regions and high-altitude catchments. We developed herein an integrated modeling system with an energy budget-based multilayer scheme for clean glaciers, a single-layer scheme for debris-covered glaciers, and multilayer scheme for seasonal snow over glacier, soil, and forest within a distributed biosphere hydrological modeling framework. Model capability is demonstrated for Hunza River Basin (13,733km(2)) in the Karakoram region of Pakistan on a 500m grid for 3 hydrologic years (2002-2004). Discharge simulation results show good agreement with observations (Nash-Sutcliffe efficiency=0.93). Flow composition analysis reveals that the runoff regime is strongly controlled by the snow and glacier melt runoff (50% snowmelt and 33% glacier melt). Pixel-by-pixel evaluation of the simulated spatial distribution of snow-covered area against Moderate Resolution Imaging Spectroradiometer-derived 8day maximum snow cover extent data indicates that the areal extent of snow cover is reproduced well, with average accuracy 84% and average absolute bias 7%. The 3year mean value of net mass balance (NMB) was estimated at +0.04myr(-1). It is interesting that individual glaciers show similar characteristics of NMB over 3years, suggesting that both topography and glacier hypsometry play key roles in glacier mass balance. This study provides a basis for potential application of such an integrated model to the entire Hindu-Kush-Karakoram-Himalaya region toward simulating snow and glacier hydrologic processes within a water and energy balance-based, distributed hydrological modeling framework.
关键词	LAND-SURFACE SCHEME SPATIAL-DISTRIBUTION MASS-BALANCE METEOROLOGICAL DATA DEBRIS THICKNESS CLIMATE-CHANGE ICE MELT COVER RUNOFF TEMPERATURE
英文关键词	energy-balance; snow melt runoff; glacier melt runoff; distributed hydrologic model; Karakoram basin; snow cover
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000356696800026
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258571
推荐引用方式 GB/T 7714	Shrestha, Maheswor,Koike, Toshio,Hirabayashi, Yukiko,et al. Integrated simulation of snow and glacier melt in water and energy balance-based, distributed hydrological modeling framework at Hunza River Basin of Pakistan Karakoram region[J]. 中国科学院青藏高原研究所,2015,120(10).
APA	Shrestha, Maheswor.,Koike, Toshio.,Hirabayashi, Yukiko.,Xue, Yongkang.,Wang, Lei.,...&Ahmad, Bashir.(2015).Integrated simulation of snow and glacier melt in water and energy balance-based, distributed hydrological modeling framework at Hunza River Basin of Pakistan Karakoram region.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,120(10).
MLA	Shrestha, Maheswor,et al."Integrated simulation of snow and glacier melt in water and energy balance-based, distributed hydrological modeling framework at Hunza River Basin of Pakistan Karakoram region".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 120.10(2015).