Vegetation History and Precipitation Changes in the NE Qinghai‐Tibet Plateau: A 7,900‐years Pollen Record From Caodalian Lake

Abstract

The northeastern Qinghai-Tibet Plateau (NE QTP) is sensitive to climatic changes due to its high elevation (>3,000 m a.s.l.) and vulnerable ecosystems, which make it well suited for investigations of environmental and climatic history. Over the past few decades, numerous paleoenvironmental and paleoclimatic reconstructions have been produced for the NE QTP, based on archives such as lake sediments (

A 17 ka multi‐proxy paleoclimatic record on the northeastern Tibetan Plateau: implications for the northernmost boundary of the Asian summer monsoon during the Holocene

“…However, it is worth noting that the early Holocene precipitation maximum in Hala Lake basin is different from the Holocene precipitation variations in the Qinghai Lake basin, which was significantly affected by the strong early Holocene ISM and the strong mid‐Holocene EASM (Chen et al ., 2016b) and exhibited an early and mid‐Holocene precipitation maximum (Lv et al ., 2021; Figure 7h). The difference in Holocene precipitation between Hala Lake basin and Qinghai Lake basin can also be observed in climate model simulations.…”

“…Comparison of (a) CaCO 3 content (this study) and (b) Rb/Sr ratio (this study) with (c) the percentages of acidophilous diatoms species (AD) from a small volcanic lake in Yunnan Province (Li et al ., 2018b), (d) pollen‐based precipitation record from Xingyun Lake (Chen et al ., 2014), (e) lake level record from Ngangla Ring Tso (Hudson et al ., 2015), (f) a new composite speleothem δ 18 O record from the Indian subcontinent and Arabian peninsula (Liu et al ., 2020), (g) pollen‐based precipitation reconstructions from Gonghai Lake (Chen et al ., 2015b) and (h) a new composite Pann record from Qinghai Lake and Caodalian Lake (Lv et al ., 2021). The yellow/blue/grey shaded bars indicate the occurrence of early Holocene precipitation maximum in Hala Lake and typical ISM regions, mid‐Holocene precipitation maximum in North China, and early and mid‐Holocene precipitation maximum in Qinghai Lake basin, respectively [Colour figure can be viewed at wileyonlinelibrary.com]…”

“…For example, Wünnemann et al (2018) indicated the possible influence of summer monsoonal precipitation on Kuhai Lake, located in the southern of Qinghai Lake, during the early and middle Holocene. Moreover, the summer monsoon‐related water supply was also considered to be the main cause of the highest level of Kuhai Lake during the mid‐Holocene (7.5–5.5 ka; Wünnemann et al, 2018), which is similar with that in Qinghai Lake (Lv et al ., 2021).…”

Calibration and Application of Branched GDGTs to Tibetan Lake Sediments: The Influence of Temperature on the Fall of the Guge Kingdom in Western Tibet, China

“…MAAT reconstruction based on alkenones from Lake Qinghai is available through Hou et al (2016); temperature proxy ( 𝐴𝐴 𝐴𝐴 𝑘𝑘 ′ 37 ) based on alkenones from lake Gahai and Sugan respectively are available through He et al (2013); temperature anomaly reconstruction based on ice cores δ 18 O from Chongce is available through Pang et al (2020); changes in total solar irradiance are available through Schmidt et al (2011) and volcanic forcing from tropical and Northern Hemisphere eruptions through Sigl et al (2015). The pollen of barley Hordeum in Lake Qinghai, Tibet is available through Wei et al (2020); composite document temperature records in China are available through Ge et al (2013); precipitation reconstructions from tree rings in the Qilian mountain are available through Yang et al (2014) and pollen in Lake Qinghai, Tibet is available through Lv et al (2021). Lake model simulated data for Xiada Co with ∼37 years (1979 are available through Chen et al (2011).…”

“…(2014) and pollen in Lake Qinghai, Tibet is available through Lv et al. (2021). Lake model simulated data for Xiada Co with ∼37 years (1979–2015 CE) are available through Chen et al.…”