NDLI: Early–middle Holocene hydroclimate changes in the Asian monsoon margin of northwest China inferred from Huahai terminal lake records

Content Provider	Springer Nature Link
Author	Li, Zhuolun Wang, Nai’ang Cheng, Hongyi Li, Yu
Copyright Year	2016
Abstract	In the Asian monsoon margin of northwest China, millennial-scale precipitation and effective moisture changes during the Holocene differ from those observed in the primary monsoon area. Whether these differences were caused by a change in precipitation or other hydroclimate factors remains controversial. We selected Huahai Lake, located in the western portion of the Hexi Corridor, at the northwest margin of the Asian monsoon area, to address this question. Using paleoclimate proxies (mineralogical assemblages and immobile elements) and results from a previous study, we inferred hydroclimate changes in this area during the early and middle Holocene (10.5–5.5 cal ka BP). Heavy precipitation and abundant runoff occurred during the early Holocene (10.5–8.8 cal ka BP). Proxies (carbonate content, total organic carbon and C/N) for precipitation minus evaporation (P − E) in the same section, however, revealed low P − E during the early Holocene and highest P − E in the middle Holocene (8.8–5.5 cal ka BP). Therefore, on a millennial timescale, precipitation amount and effective moisture changes were asynchronous during the early and middle Holocene. The precipitation and effective moisture pattern in the study area during that time span was different from patterns in both the Asian monsoon and westerly wind-influenced areas, suggesting an interplay between the two climate features. High precipitation during the early Holocene corresponded to a strengthened Asian monsoon. Highest P − E in the study area occurred during the middle Holocene and may have been caused by low evaporation, rather than high precipitation.
Starting Page	289
Ending Page	302
Page Count	14
File Format	PDF
ISSN	09212728
Journal	Journal of Paleolimnology
Volume Number	55
Issue Number	3
e-ISSN	15730417
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-02-05
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Holocene Asian monsoon Effective moisture Precipitation Northwest China Paleontology Sedimentology Climate Change Physical Geography Freshwater & Marine Ecology Geology
Content Type	Text
Resource Type	Article
Subject	Earth-Surface Processes Aquatic Science

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