Late Pliocene temperatures and their spatial variation at the southeastern border of the Qinghai-Tibet Plateau

doi:10.1016/j.jseaes.2015.04.048

	Late Pliocene temperatures and their spatial variation at the southeastern border of the Qinghai-Tibet Plateau
	Huang,Yong-Jiang; Chen,Wen-Yun; Jacques,Frederic M. B.; Liu,Yu-Sheng Christopher; Utescher,Torsten; Su,Tao; Ferguson,David K.; Zhou,Zhe-Kun
	2015-11-01
发表期刊	JOURNAL OF ASIAN EARTH SCIENCES
卷号	111 页码:44-53
摘要	It is widely accepted that the late Pliocene spans a time with globally warmer conditions compared to today. Regional specifics in temperature patterns from this period, however, remain poorly known. In this study, we reconstruct quantitatively late Pliocene climates for eight sites at the southeastern border of the Qinghai-Tibet Plateau (SBTP), based on palaeobotanical data compiled from published sources using the Coexistence Approach (CoA), and analyze anomalies with respect to modern climates. The reconstructed temperatures indicate that in the late Pliocene, the northwestern part of the study area was cooler than its southern part. This spatial differentiation in temperature was largely due to differences in altitude: the northwest of the SBTP probably had higher altitudes than the south at that time. Mean annual temperatures (MATS) were around 1 degrees C higher than today, suggesting a cooling trend since the late Pliocene. Our data show that summer temperatures have declined significantly since the late Pliocene while winter temperatures have remained similar to those of the present, different from observations in other territories. The unexpected summer and winter temperature changes can be explained by the regional orogenic uplift plus the global cooling. The eastward extrusion of the Qinghai-Tibet Plateau might have blocked the southward cold high pressure of the winter monsoon and forced it to circumvent the eastern flank of the plateau, weakening its impact on the SBTP. The post-Pliocene mountain uplift increased the overall altitude of the region, which caused the temperature decline for both summer and winter. The reconstructed summer precipitation was lower while the winter precipitation was higher than today, suggesting a weaker monsoon climate during the late Pliocene. (C) 2015 Elsevier Ltd. All rights reserved.
关键词	Late Pliocene Palaeoclimatic Reconstruction Temperature Precipitation Qinghai-tibet Plateau Coexistence Approach
DOI	10.1016/j.jseaes.2015.04.048
收录类别	SCI
语种	英语
WOS记录号	WOS:000362603300004
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/25202
专题	中国科学院东亚植物多样性与生物地理学重点实验室
推荐引用方式 GB/T 7714	Huang,Yong-Jiang,Chen,Wen-Yun,Jacques,Frederic M. B.,et al. Late Pliocene temperatures and their spatial variation at the southeastern border of the Qinghai-Tibet Plateau[J]. JOURNAL OF ASIAN EARTH SCIENCES,2015,111:44-53.
APA	Huang,Yong-Jiang.,Chen,Wen-Yun.,Jacques,Frederic M. B..,Liu,Yu-Sheng Christopher.,Utescher,Torsten.,...&Zhou,Zhe-Kun.(2015).Late Pliocene temperatures and their spatial variation at the southeastern border of the Qinghai-Tibet Plateau.JOURNAL OF ASIAN EARTH SCIENCES,111,44-53.
MLA	Huang,Yong-Jiang,et al."Late Pliocene temperatures and their spatial variation at the southeastern border of the Qinghai-Tibet Plateau".JOURNAL OF ASIAN EARTH SCIENCES 111(2015):44-53.

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