干旱区生态环境知识资源中心(Arid): Model-based orbital-scale precipitation δ18O variations and distinct mechanisms in Asian monsoon and arid regions

Arid

DOI	10.1093/nsr/nwac182
	Model-based orbital-scale precipitation δ18O variations and distinct mechanisms in Asian monsoon and arid regions
	Liu, Xiaodong; Xie, Xiaoxun; Guo, Zhengtang; Yin, Zhi-Yong; Chen, Guangshan
通讯作者	Liu, XD
来源期刊	NATIONAL SCIENCE REVIEW
ISSN	2095-5138
EISSN	2053-714X
出版年	2022
卷号	9 期号:11
英文摘要	A 300,000-year transient isotope-enabled simulation revealed the regional differences and causes of the orbital-scale precipitation isotope variations in arid Central Asia, monsoonal South Asia and East Asia. The past Asian precipitation delta O-18 (delta O-18(p)) records from stalagmites and other deposits have shown significant orbital-scale variations, but their climatic implications and regional differences are still not fully understood. This study, as the first attempt of a 300-kyr transient stable isotope-enabled simulation, investigated the characteristics and mechanisms of the orbital-scale delta O-18(p) variations in three representative regions of Asia: arid Central Asia (CA), monsoonal South Asia (SA) and monsoonal East Asia (EA). The modelling results showed that the variations in the CA, SA and EA annual delta O-18(p) exhibited significant but asynchronous 23-kyr precession cycles. Further analyses revealed that although the precession-induced insolation variation was the ultimate cause of the delta O-18(p) variation in all three regions, the dominant mechanisms and the involved physical processes were distinct among them. For the CA region, the rainy-season (November-March) temperature effect and water vapour transport by the westerly circulation were identified as the key precession-scale processes linking the October-February boreal mid-latitude insolation to the rainy-season or annual delta O-18(p). In the SA region, the rainy-season (June-September) precipitation amount effect and upstream depletion of the monsoonal water vapour delta O-18 served as the main mechanisms linking the rainy-season or annual delta O-18(p) to the April-July insolation variation at the precession scale. For the EA region, however, the precession-scale annual delta O-18(p) was mainly controlled by the late-monsoon (August-September) and pre-monsoon (April-May) water vapour transport patterns, which were driven by the July-August insolation and the global ice volume, respectively. These results suggest that the climatic implications of the orbital-scale Asia delta O-18(p) variations are sensitive to their geographic locations as determined by the combined effects of insolation and regional circulation patterns associated with the respective rainy seasons. This study provides new insights into understanding the regional differences and formation mechanisms of the Asian orbital-scale delta O-18(p) variations.
英文关键词	orbital scale precipitation delta O-18 transient simulation Asian monsoon arid region
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000868770900001
WOS关键词	STABLE-ISOTOPE VARIATIONS ; OXYGEN-ISOTOPE ; ATMOSPHERIC CONTROLS ; CIRCULATION MODEL ; WATER ISOTOPES ; EAST-ASIA ; SUMMER ; CLIMATE ; RECORDS ; PALEOCLIMATE
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393837
推荐引用方式 GB/T 7714	Liu, Xiaodong,Xie, Xiaoxun,Guo, Zhengtang,et al. Model-based orbital-scale precipitation δ18O variations and distinct mechanisms in Asian monsoon and arid regions[J],2022,9(11).
APA	Liu, Xiaodong,Xie, Xiaoxun,Guo, Zhengtang,Yin, Zhi-Yong,&Chen, Guangshan.(2022).Model-based orbital-scale precipitation δ18O variations and distinct mechanisms in Asian monsoon and arid regions.NATIONAL SCIENCE REVIEW,9(11).
MLA	Liu, Xiaodong,et al."Model-based orbital-scale precipitation δ18O variations and distinct mechanisms in Asian monsoon and arid regions".NATIONAL SCIENCE REVIEW 9.11(2022).