气候变化领域集成服务门户(CCPortal): Correlation between precipitation and temperature variations in the past 300years recorded in Guliya ice core, China

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DOI	10.3189/172756406781812384
	Correlation between precipitation and temperature variations in the past 300years recorded in Guliya ice core, China
	Yang, Meixue; Yao, Tandong; Wang, Huijun; Gou, Xiaohua
发表日期	2006
ISSN	0260-3055
起始页码	137
结束页码	+
卷号	43
英文摘要	The Guliya ice cap, on the crest of the Kunlun Shan, central Asia, is an ideal site for acquiring ice cores for climate-change studies. Detailed analyses of the precipitation index (glacier accumulation) and the temperature proxy (delta O-18) recorded in the Guliya ice core since 300 year SBP show that precipitation correlates with temperature in this region. Climate conditions in the Guliya region since 300 years Bp can be separated into three periods: warm and wet from AD 1690 to the end of the 18th century; cold and dry from the 19th century to the 1930s; and warm and wet again since the 1940s. During this period, the climate exhibits just two phases: warm/wet and cold/dry. Comparison of the temperatures and the precipitation recorded in the Guliya ice core shows that variations of temperature and precipitation in the region correlate quite well. However, changes in the precipitation regime appear to lag behind those of the temperature by 20-40 years. We believe this results from the larger heat capacity of the ocean relative to that of the land. Hence, ocean temperatures and corresponding evaporation rates change more slowly than do continental conditions. Additionally, however, positive feedback processes, such as increasing temperatures and precipitation improving vegetation, moisture retention and, hence, local convective precipitation probably play an important role. In this paper, we explain how the timescale of evolving vegetation and the feedback mechanism between precipitation and the temperature could help explain why the changes in precipitation lag those of temperature by 20-40 years over long periods. Taking this time lag into account, we should be able to predict future precipitation trends, based on observed temperature trends.
关键词	TIBETAN PLATEAU CLIMATE MONSOON HISTORY EVENTS
学科领域	Geology
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000245520800019
来源期刊	ANNALS OF GLACIOLOGY, VOL 43, 2006
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/111460
推荐引用方式 GB/T 7714	Yang, Meixue,Yao, Tandong,Wang, Huijun,et al. Correlation between precipitation and temperature variations in the past 300years recorded in Guliya ice core, China[J]. 中国科学院青藏高原研究所,2006,43.
APA	Yang, Meixue,Yao, Tandong,Wang, Huijun,&Gou, Xiaohua.(2006).Correlation between precipitation and temperature variations in the past 300years recorded in Guliya ice core, China.ANNALS OF GLACIOLOGY, VOL 43, 2006,43.
MLA	Yang, Meixue,et al."Correlation between precipitation and temperature variations in the past 300years recorded in Guliya ice core, China".ANNALS OF GLACIOLOGY, VOL 43, 2006 43(2006).