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DOI	10.1016/j.palaeo.2019.06.003
	Large dry-humid fluctuations in Asia during the Late Cretaceous due to orbital forcing: A modeling study
	Zhang, Jian; Liu, Yonggang; Fang, Xiaomin; Wang, Chengshan; Yang, Yibo
通讯作者	Zhang, J (通讯作者)
发表日期	2019
ISSN	0031-0182
EISSN	1872-616X
卷号	533
英文摘要	Cretaceous stratigraphy in the mid- to low-latitude Asia indicates that the climate was overall dry with large variations in aridity in timescales of 1-100 ka, different from the present-day monsoonal humid climate. To identify the possible mechanism for such variation, we modeled the Late Cretaceous climate using a fully coupled atmosphere-ocean general circulation model (AOGCM), Community Earth System Model version 1.2 (CESM1.2), under different CO2 concentrations and orbital configurations. The simulation results show that the mid- to low-latitude Asia was generally dry during that time, consistent with reconstructions. The arid area decreases and the semi-arid area increases with the increase of CO2 concentration, but the change in total area is small even when CO2 is increased by 8 folds. In contrast, the area of dryland can increase by similar to 67% or 500% depending on how dryness is defined, when the orbital configuration changes from one in which the northern hemispheric summer receives the most solar insolation to one in which it receives the least solar insolation. Therefore, the mid- to low-latitude Asia was likely going through dramatic dry-humid cycles at orbital timescale during the Late Cretaceous, similar to the Saharan region during the Late Miocene-Pleistocene.
关键词	TIBETAN PLATEAU GENERAL-CIRCULATION SUMMER MONSOONS CLIMATE BASIN SCALE INTERIOR
英文关键词	Asian aridity; Orbital cycle; Paleoclimate modeling; Greenhouse climate
语种	英语
WOS研究方向	Physical Geography ; Geology ; Paleontology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS记录号	WOS:000487174100008
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
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/259552
推荐引用方式 GB/T 7714	Zhang, Jian,Liu, Yonggang,Fang, Xiaomin,et al. Large dry-humid fluctuations in Asia during the Late Cretaceous due to orbital forcing: A modeling study[J]. 中国科学院青藏高原研究所,2019,533.
APA	Zhang, Jian,Liu, Yonggang,Fang, Xiaomin,Wang, Chengshan,&Yang, Yibo.(2019).Large dry-humid fluctuations in Asia during the Late Cretaceous due to orbital forcing: A modeling study.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,533.
MLA	Zhang, Jian,et al."Large dry-humid fluctuations in Asia during the Late Cretaceous due to orbital forcing: A modeling study".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 533(2019).