Quantitative relationships between modern pollen rain and climate in the Tibetan Plateau

Shen, Caiming; Liu, Kam Biu; Tang, Lina; Overpeck, Jonathan T.

doi:10.1016/j.revpalbo.2006.03.001

Cited by 192 publications

(146 citation statements)

References 31 publications

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“…During the last two decades, the variability of the Indian summer monsoon (ISM) in the Holocene has been reconstructed from various types of paleoclimatic archive and proxies, such as stalagmite oxygen isotope (δ 18 O) records Fleitmann et al, 2003, marine sediments (Contreras-Rosales et al, 2014;Gupta et al, 2003;Rashid et al, 2007), and lake and peatland sediments (Bird et al, 2014;Chen et al, 2014;Cook et al, 2013;Demske et al, 2009;Fuchs and Buerkert, 2008;Jarvis, 1993;Kramer et al, 2010;Prasad et al, 2014;Sarkar et al, 2015;C. Shen et al, 2006;J.…”

Section: Introductionmentioning

confidence: 99%

“…Modern pollen data indicate that the mean temperature of the coldest month and annual precipitation are the dominant climatic variables of modern pollen/vegetation distributions in South China (Li et al, 2015). Pollen analysis has been widely used to reconstruct Holocene paleovegetation and paleoclimate in the region (Chen et al, 2014;Cook et al, 2013;Jarvis, 1993;Kramer et al, 2010;C. Shen et al, 2006;Song et al, 2012;Xiao et al, 2014a).…”

Section: Introductionmentioning

confidence: 99%

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Holocene Asian monsoon evolution revealed by a pollen record from an alpine lake on the southeastern margin of the Qinghai–Tibetan Plateau, China

et al. 2016

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Abstract. We present the results of pollen analyses from a 1105 cm long sediment core from Wuxu Lake in southwestern China, which depict the variations of the East Asian winter monsoon (EAWM) and the Indian summer monsoon (ISM) during the last 12.3 ka. During the period of 12.3 to 11.3 cal ka BP, the dominance of Betula forest and open alpine shrub and meadow around Wuxu Lake indicates a climate with relatively cold winters and dry summers, corresponding to the Younger Dryas event. Between 11.3 and 10.4 cal ka BP, further expansion of Betula forest and the retreat of alpine shrubs and meadows reflect a greater seasonality with cold winters and gradually increasing summer precipitation. From 10.4 to 4.9 cal ka BP, the dense forest understory, together with the gradual decrease in Betula forest and increase in Tsuga forest, suggest that the winters became warmer and summer precipitation was at a maximum, corresponding to the Holocene climatic optimum. Between 4.9 and 2.6 cal ka BP, Tsuga forest and alpine shrubs and meadows expanded significantly, reflecting relatively warm winters and decreased summer precipitation. Since 2.6 cal ka BP, reforestation around Wuxu Lake indicates a renewed humid period in the late Holocene; however, the vegetation in the catchment may also have been affected by grazing activity during this period. The results of our study are generally consistent with previous findings; however, the timing and duration of the Holocene climatic optimum from different records are inconsistent, reflecting real contrast in local rainfall response to the ISM. Overall, the EAWM is broadly inphase with the ISM on the orbital timescale, and both monsoons exhibit a trend of decreasing strength from the early to late Holocene, reflecting the interplay of solar insolation receipt between the winter and summer seasons and El Niño-Southern Oscillation strength in the tropical Pacific.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Holocene Asian monsoon evolution revealed by a pollen record from an alpine lake on the southeastern margin of the Qinghai–Tibetan Plateau, China

et al. 2016

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“…The deciphering of fossil pollen data must be performed on the basis of the investigation of modern pollen assemblages. Numerous studies (e.g., Wright et al, 1967;Gaillard et al, 1992;Sugita, 1994;Cour et al, 1999;Davis, 2000;Shen et al, 2006;Ma et al, 2008;Zhao and Herzschuh, 2009;Herzschuh et al, 2010;Lu et al, 2011;Fall, 2012;Zheng et al, 2013;Tian et al, 2014) have been conducted to understand the relationship of modern pollen assemblages with contemporary vegetation and climate. Modern pollen assemblages are mainly collected from airborne pollen collectors (e.g., Cour et al, 1999;Giesecke et al, 2010), moss polsters (e.g., Hicks and Birks, 1996;Mazier et al, 2006), topsoils (e.g., Xu et al, 2009;Zhang et al, 2010) and surface lake sediments (e.g., Herzschuh, 2007;Seppa et al, 2004).…”

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confidence: 99%

Modern pollen assemblages from surface lake sediments in northwestern China and their importance as indicators of vegetation and climate

Feng

Zhao

et al. 2015

Sci. China Earth Sci.

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The modern pollen assemblages of surface lake sediments and topsoils in northwestern China were studied to understand the relationship of modern pollen data with contemporary vegetation and climate, and the differences between the pollen assemblages of surface lake sediments and topsoils. The results show that Chenopodiaceae and Artemisia are dominant elements in the pollen assemblages of northwestern China. Additionally, Ephedra, Cyperaceae, Asteraceae, Poaceae, Picea, Pinus, and Betula are also important pollen taxa. Both pollen assemblages and principal component analysis indicate that pollen data from surface lake sediments and topsoils can be used to differentiate the main vegetation types of this region (desert, steppe, meadow and forest). However, differences exist between modern pollen assemblages of the two types of sediments due to the different relevant source areas of pollen and degrees of pollen preservation. For example, the larger relevant source area of surface lake sediment results in a higher abundance of Betula in pollen assemblage from surface lake sediment, whereas the tendency to disintegrate thin-walled pollen types in topsoil leads to a higher proportion of resistant pollen, such as Asteraceae. Linear regression analysis indicates that the Artemisia/Chenopodiaceae (A/C) ratio in pollen assemblages of surface lake sediments can be used to indicate humidity changes in the study area. However, the A/C ratio in topsoils should be used carefully. Our results suggest that pollen data from surface lake sediments would be better references for interpreting the fossil pollen assemblages of lake cores or lacustrine profiles. Pollen data have been used to unravel the vegetation succession and climatic changes of the past since the pioneering work of von Post in 1916(Davis, 2000. The deciphering of fossil pollen data must be performed on the basis of the investigation of modern pollen assemblages. Numerous studies (e.g., Wright et al., 1967;Gaillard et al., 1992;Sugita, 1994;Cour et al., 1999;Davis, 2000;Shen et al., 2006;Ma et al., 2008;Zhao and Herzschuh, 2009;Herzschuh et al., 2010;Lu et al., 2011;Fall, 2012;Zheng et al., 2013;Tian et al., 2014) have been conducted to understand the relationship of modern pollen assemblages with contemporary vegetation and climate. Modern pollen assemblages are mainly collected from airborne pollen collectors (e.g., Cour et al

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“…High-resolution lake sediment records have been obtained from Yidun Lake [6] in southern Tibet and Ren Co [7] in the southeastern Plateau, Yanmdrok Lake [13] in the southern Plateau, and Peiku Co [8] and Zabuye Lake [12] in the southwestern Plateau. Moreover, the recent environmental records of Naleng Lake [31] in the eastern Plateau and Ximen Co [32] are dominated by glacial meltwater supplies, and could be compared with our results, even though both lakes experience the influence of the southeast monsoon.…”

Section: Comparison With Other Lakes Records In Southern Tibetmentioning

confidence: 99%

“…Thus, spatial differentiation of climatic records in this region is possible. To date, lake sediment records have obtained only limited coverage in the southern Tibetan Plateau region [5][6][7][8][9][10]. In addition, there is a lack of highresolution records that encompass the deglacial stage [11][12][13].…”

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confidence: 99%

A high-resolution environmental change record since 19 cal ka BP in Pumoyum Co, southern Tibet

Zhu

Nishimura

et al. 2011

Chin. Sci. Bull.

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A 380-cm-long sediment core was acquired from the deep water area of Pumoyum Co, southern Tibet. Twenty-five plant residue samples were selected, and organic carbon stable isotopes were obtained using the AMS 14 C chronological method. The 14 C age and carbon reservoir effect were calibrated with surface sedimentation rate measurements using 210 Pb dating. Results showed that the core sediment deposited over 19 cal ka BP. Based on a multi-proxy analysis of TOC and IC contents, grain size and pollen assemblage data, the palaeoclimatic evolution of Pumoyum Co was reconstructed since the last glacial. Pumoyum Co was a shallow lake prior to 16.2 cal ka BP; although the glacier around the lake began to melt due to increasing temperatures, climate was still cold and dry. In the interval of 16.2-11.8 cal ka BP, the sedimentary environment fluctuated drastically and frequently. Two cold-events occurred at 14.2 and 11.8 cal ka BP, and these may correspond to the Older Dryas and the Younger Dryas events, respectively. After 11.8 cal ka BP, Pumoyun Co developed into the deep lake as it is now. The lake water temperature was relatively lower at that time because of influx of cold water from glacial meltwater entering the lake. As a result, the multi-proxy indicators showed no sign of warm conditions. Comparisons between the sedimentary record of Pumoyum Co with that of other lakes of the same age in southern Tibet indicate a warmer climate following the last deglaciation influenced the southeastern Tibetan Plateau. These results imply that the southwest Asian monsoon gradually became stronger since the deglaciation during its expansion to the inner plateau. The glacial-supplied water of the lake responded sensitively to cold-events. The entire southern Tibet region was dominantly influenced climatically by the southwest Asian monsoon during the Holocene.Tibet, Pumoyum Co, lake sedimentation, environmental change, high resolution, glacial meltwater Citation:Lü X M, Zhu L P, Nishimura M, et al. A high-resolution environmental change record since 19 cal ka BP in Pumoyum Co, southern Tibet.

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Quantitative relationships between modern pollen rain and climate in the Tibetan Plateau

Cited by 192 publications

References 31 publications

Holocene Asian monsoon evolution revealed by a pollen record from an alpine lake on the southeastern margin of the Qinghai–Tibetan Plateau, China

Holocene Asian monsoon evolution revealed by a pollen record from an alpine lake on the southeastern margin of the Qinghai–Tibetan Plateau, China

Modern pollen assemblages from surface lake sediments in northwestern China and their importance as indicators of vegetation and climate

A high-resolution environmental change record since 19 cal ka BP in Pumoyum Co, southern Tibet

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