气候变化领域集成服务门户(CCPortal): Recent climate changes in the northwestern Qaidam Basin inferred from geothermal gradients

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DOI	10.1007/s12145-019-00425-9
	Recent climate changes in the northwestern Qaidam Basin inferred from geothermal gradients
	Liu, Jia; Zhang, Tingjun; Wu, Qingbai; Jiang, Guan-Li
发表日期	2020
ISSN	1865-0473
EISSN	1865-0481
起始页码	261
结束页码	270
卷号	13 期号:2
英文摘要	Temperature perturbations under the ground surface are a direct thermal response to temperature changes on the ground surface. Thus, borehole temperature measurements can be used to reconstruct the temperature history of the ground surface using borehole Paleothermometry. In this study, we use seven borehole temperature profiles to reconstruct the ground surface temperature variation for the past 514 years in the Qaidam Basin, northwestern China. Borehole transient temperature measurements from seven sites in the northwestern Qaidam Basin were separated from the geothermal gradients and analyzed using the functional space inversion method to determine the ground surface temperature variation history of the region. All of the temperature profiles show the effects of recent climatic disturbances. The inversion reveals that during the last 514 years, the ground surface temperature has increased by an average of 1.2 degrees C (-0.11 to 2.21 degrees C). Clear signs of a cold period between 1500 and 1900 A.D. were found, which corresponds to the Little Ice Age. The coldest period occurred between 1780 and 1790 A.D. with a ground surface temperature of 5.4 degrees C. The reconstructed ground surface temperature shows an increasing trend during the 19th and the 20th centuries, but the temperature began to decrease in the late twentieth century. However, during the past 514 years, the highest temperature occurred in the 1990s. This reconstructed ground surface temperature variation history is verified by the simulated annual surface air temperature computed using EdGCM, while the cooling trend is confirmed by reconstructions of the winter half-year minimum temperatures from tree rings on the northeastern Tibetan Plateau.
英文关键词	Borehole paleothermometry; Geothermal gradients; Functional space inversion; Qaidam Basin
语种	英语
WOS研究方向	Computer Science ; Geology
WOS类目	Computer Science, Interdisciplinary Applications ; Geosciences, Multidisciplinary
WOS关键词	SUPERIOR PROVINCE ; TEMPERATURE ; INVERSION ; TRENDS
WOS记录号	WOS:000533083300004
来源期刊	EARTH SCIENCE INFORMATICS
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/240277
作者单位	[Liu, Jia] Changan Univ, Sch Sci, Xian 710064, Peoples R China; [Zhang, Tingjun] Lanzhou Univ, Minist Educ, Key Lab Western Chinas Environm Syst, Coll Earth & Environm Sci, Lanzhou 730000, Peoples R China; [Wu, Qingbai; Jiang, Guan-Li] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Liu, Jia,Zhang, Tingjun,Wu, Qingbai,et al. Recent climate changes in the northwestern Qaidam Basin inferred from geothermal gradients[J]. 中国科学院西北生态环境资源研究院,2020,13(2).
APA	Liu, Jia,Zhang, Tingjun,Wu, Qingbai,&Jiang, Guan-Li.(2020).Recent climate changes in the northwestern Qaidam Basin inferred from geothermal gradients.EARTH SCIENCE INFORMATICS,13(2).
MLA	Liu, Jia,et al."Recent climate changes in the northwestern Qaidam Basin inferred from geothermal gradients".EARTH SCIENCE INFORMATICS 13.2(2020).