New evidence on deglacial climatic variability from an alpine lacustrine record in northwestern Yunnan Province, southwestern China
New deglacial pollen and conifer stoma records from Tiancai Lake, northwestern Yunnan Province, southwestern China, an alpine lake in the southwest monsoon region, are presented in this study. Based on these records, the lithology of core TCYL1, and PCA analysis of pollen data between ~21 and 11.5ka...
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ftanucanberra:oai:digitalcollections.anu.edu.au:1885/70616 2023-05-15T13:36:32+02:00 New evidence on deglacial climatic variability from an alpine lacustrine record in northwestern Yunnan Province, southwestern China Xiao, Xiayun Haberle, Simon Yang, Xiangdong Shen, J Han, Yong Wang, Sumin 2015-12-13T22:15:54Z http://hdl.handle.net/1885/70616 unknown Elsevier 0031-0182 http://hdl.handle.net/1885/70616 Palaeogeography, Palaeoclimatology, Palaeoecology Journal article 2015 ftanucanberra 2015-12-28T23:34:56Z New deglacial pollen and conifer stoma records from Tiancai Lake, northwestern Yunnan Province, southwestern China, an alpine lake in the southwest monsoon region, are presented in this study. Based on these records, the lithology of core TCYL1, and PCA analysis of pollen data between ~21 and 11.5kaBP (calibrated 14C years), the deglacial vegetation and climate changes are discussed in detail. The results show that Tiancai Lake was above the upper limit of Picea/Abies forest (a treeline in the study area) between ~21 and 11.5kaBP, and the climate was colder and drier than that of the Holocene. During this period eight significant vegetation changes are recorded that are considered to be responses to changing temperatures and variations in the southwest monsoon in southwestern China. The Heinrich Event 1 (H1), the Bølling/Allerød warm period (BA) and the Younger Dryas cold event (YD) are all clearly detected in this record. In addition, this study finds that the initial late glacial warming in northwestern Yunnan Province was at ~18.7kaBP, which is coincident with the climate records in monsoonal Central Asia, the Indian Ocean, the tropical and subtropical Pacific Ocean, and Antarctica, and is a response to solar insolation changes. A noted temperature increase between 15.8 and 14.4kaBP occurred at the end of the H1 and before the BA, which indicates a strong pre-Bølling warming. Based on the study, we consider that the hypothesis about a slowdown of the ocean's thermohaline circulation is sufficient to explain these late glacial abrupt events. Article in Journal/Newspaper Antarc* Antarctica Australian National University: ANU Digital Collections Alpine Lake ENVELOPE(-129.182,-129.182,55.529,55.529) Indian Pacific |
institution |
Open Polar |
collection |
Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
unknown |
description |
New deglacial pollen and conifer stoma records from Tiancai Lake, northwestern Yunnan Province, southwestern China, an alpine lake in the southwest monsoon region, are presented in this study. Based on these records, the lithology of core TCYL1, and PCA analysis of pollen data between ~21 and 11.5kaBP (calibrated 14C years), the deglacial vegetation and climate changes are discussed in detail. The results show that Tiancai Lake was above the upper limit of Picea/Abies forest (a treeline in the study area) between ~21 and 11.5kaBP, and the climate was colder and drier than that of the Holocene. During this period eight significant vegetation changes are recorded that are considered to be responses to changing temperatures and variations in the southwest monsoon in southwestern China. The Heinrich Event 1 (H1), the Bølling/Allerød warm period (BA) and the Younger Dryas cold event (YD) are all clearly detected in this record. In addition, this study finds that the initial late glacial warming in northwestern Yunnan Province was at ~18.7kaBP, which is coincident with the climate records in monsoonal Central Asia, the Indian Ocean, the tropical and subtropical Pacific Ocean, and Antarctica, and is a response to solar insolation changes. A noted temperature increase between 15.8 and 14.4kaBP occurred at the end of the H1 and before the BA, which indicates a strong pre-Bølling warming. Based on the study, we consider that the hypothesis about a slowdown of the ocean's thermohaline circulation is sufficient to explain these late glacial abrupt events. |
format |
Article in Journal/Newspaper |
author |
Xiao, Xiayun Haberle, Simon Yang, Xiangdong Shen, J Han, Yong Wang, Sumin |
spellingShingle |
Xiao, Xiayun Haberle, Simon Yang, Xiangdong Shen, J Han, Yong Wang, Sumin New evidence on deglacial climatic variability from an alpine lacustrine record in northwestern Yunnan Province, southwestern China |
author_facet |
Xiao, Xiayun Haberle, Simon Yang, Xiangdong Shen, J Han, Yong Wang, Sumin |
author_sort |
Xiao, Xiayun |
title |
New evidence on deglacial climatic variability from an alpine lacustrine record in northwestern Yunnan Province, southwestern China |
title_short |
New evidence on deglacial climatic variability from an alpine lacustrine record in northwestern Yunnan Province, southwestern China |
title_full |
New evidence on deglacial climatic variability from an alpine lacustrine record in northwestern Yunnan Province, southwestern China |
title_fullStr |
New evidence on deglacial climatic variability from an alpine lacustrine record in northwestern Yunnan Province, southwestern China |
title_full_unstemmed |
New evidence on deglacial climatic variability from an alpine lacustrine record in northwestern Yunnan Province, southwestern China |
title_sort |
new evidence on deglacial climatic variability from an alpine lacustrine record in northwestern yunnan province, southwestern china |
publisher |
Elsevier |
publishDate |
2015 |
url |
http://hdl.handle.net/1885/70616 |
long_lat |
ENVELOPE(-129.182,-129.182,55.529,55.529) |
geographic |
Alpine Lake Indian Pacific |
geographic_facet |
Alpine Lake Indian Pacific |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Palaeogeography, Palaeoclimatology, Palaeoecology |
op_relation |
0031-0182 http://hdl.handle.net/1885/70616 |
_version_ |
1766080268427329536 |