气候变化领域集成服务门户(CCPortal): Holocene negative coupling of summer temperature and moisture availability over southeastern arid Central Asia

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DOI	10.1007/s00382-020-05319-x
	Holocene negative coupling of summer temperature and moisture availability over southeastern arid Central Asia
	Li J.; Wang N.; Dodson J.; Yan H.; Zhang X.; Jia P.W.; Seppä H.
发表日期	2020
ISSN	0930-7575
起始页码	1187
结束页码	1208
卷号	55
英文摘要	The Holocene moisture–temperature correlation on varying spatial–temporal scales in arid Central Asia (ACA) is still controversial. It has been widely reported that ACA experienced multi-centennial alternations between warm/dry and cold/wet climates over the past two millennia. However, less attention has focused on orbital-scale moisture–temperature relationship at a regional scale across ACA. Here, we contribute a framework including a set of quantitative algorithms to acquire reliable pollen-based climatic reconstructions. We apply this methodology to a new pollen record from a wetland in northern Xinjiang (southeastern ACA) for quantitative reconstructions of moisture availability (actual/potential evapotranspiration ratio, AET/PET) and summer temperature (mean temperature of the warmest month, MTWA) over circa the last 10,300 years. We select AET/PET and MTWA because they are evaluated to be most statistically independent and ecologically significant. The effect of differing spatial extents of calibration-sets on model performance is tested to determine the optimal extent. We critically assess the reliability of all reconstructions through calculations of statistical significance, analogue quality and goodness-of-fit statistics. Our final reconstructions are statistically significant with independent features of AET/PET and MTWA, showing an increasing (declining) trend of Holocene moisture (temperature). This anti-phase pattern is consistent with other records and model simulations across southeastern ACA. The data-model consistency postulates that (i) the glacier meltwater from Tien Shan (‘Water Tower of Central Asia’) is crucial to support major streamflow and watersheds over ACA, and (ii) the Holocene wetting trend may be determined by the interacting effects between decreased summer temperature and increased winter precipitation. © 2020, Springer-Verlag GmbH Germany, part of Springer Nature.
英文关键词	AET/PET; Holocene; MTWA; Pollen; Southeastern ACA
语种	英语
scopus关键词	arid region; atmospheric moisture; evapotranspiration; Holocene; paleoclimate; paleotemperature; palynology; summer; Central Asia
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145364
作者单位	Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity, College of Urban and Environmental Science, Northwest University, Xi’an, 710127, China; Institute of Earth Surface System and Hazards, College of Urban and Environmental Sciences, Northwest University, Xi’an, 710127, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, China; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, 710061, China; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266061, China; CAS Center for Excellence in Quaternary Science and Global Change, Xi’an, China; School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, 210093, China; Department of Archaeology, CCANESA, University of Sydney, Sydney, NSW 2006, Australia; Department of Geosciences and Geography, University of Helsinki, Helsinki, 00014, Finland
推荐引用方式 GB/T 7714	Li J.,Wang N.,Dodson J.,et al. Holocene negative coupling of summer temperature and moisture availability over southeastern arid Central Asia[J],2020,55.
APA	Li J..,Wang N..,Dodson J..,Yan H..,Zhang X..,...&Seppä H..(2020).Holocene negative coupling of summer temperature and moisture availability over southeastern arid Central Asia.Climate Dynamics,55.
MLA	Li J.,et al."Holocene negative coupling of summer temperature and moisture availability over southeastern arid Central Asia".Climate Dynamics 55(2020).