气候变化领域集成服务门户(CCPortal): Glacier meltwater and runoff modelling, Keqicar Baqi glacier, southwestern Tien Shan, China

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DOI	10.3189/172756507781833956
	Glacier meltwater and runoff modelling, Keqicar Baqi glacier, southwestern Tien Shan, China
	Zhang Yong; Liu Shiyin; Ding Yongjian
发表日期	2007
ISSN	0022-1430
EISSN	1727-5652
起始页码	91
结束页码	98
卷号	53 期号:180
英文摘要	Meltwater and runoff from Keqicar Baqi glacier, a large glacier in the southwestern Tien Shan, northwestern China, are simulated using a modified degree-day model including potential clear-sky direct solar radiation, coupled with a linear reservoir model for the period 1 July to 12 September 2003. There is good agreement between modelled and measured meltwater at ablation stakes and between simulated and observed runoff at the glacier terminus. A reconstruction of glacier meltwater and runoff from an assumed debris-free surface during the study period shows that the effect of the debris layer on glacier meltwater generation crucially affects glacier runoff. The model is also used to calculate glacier runoff given the climate scenario resulting from a doubling of CO2 as projected by the ReCM2 regional climate model. The projected changes in temperature and precipitation vary from 0 to 2.7 degrees C and from 0 to 25%, respectively. Results indicate that glacier runoff increases linearly with temperature over these ranges whether or not the debris layer is taken into consideration. The effect of change in temperature is much more noticeable than that for change in precipitation. Due to the debris layer predominantly covering (and insulating) the ablation area, the response of glacier runoff is less sensitive to temperature increase with a debris-covered surface than with a debris-free surface. Glacier runoff is also markedly reduced when a reduced glacier area is prescribed in the +2.7 degrees C scenario.
关键词	ENERGY-BALANCE MODEL CLIMATE-CHANGE MASS-BALANCE CATCHMENT VALLEY BASIN
语种	英语
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS记录号	WOS:000246007900008
来源期刊	JOURNAL OF GLACIOLOGY
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/257464
推荐引用方式 GB/T 7714	Zhang Yong,Liu Shiyin,Ding Yongjian. Glacier meltwater and runoff modelling, Keqicar Baqi glacier, southwestern Tien Shan, China[J]. 中国科学院青藏高原研究所,2007,53(180).
APA	Zhang Yong,Liu Shiyin,&Ding Yongjian.(2007).Glacier meltwater and runoff modelling, Keqicar Baqi glacier, southwestern Tien Shan, China.JOURNAL OF GLACIOLOGY,53(180).
MLA	Zhang Yong,et al."Glacier meltwater and runoff modelling, Keqicar Baqi glacier, southwestern Tien Shan, China".JOURNAL OF GLACIOLOGY 53.180(2007).