Rapid environmental changes in the Lake Qinghai basin during the late Holocene
The Lake Qinghai Basin is sensitive to global and regional climate change because of its unique geographical location. It is the hotspot for paleoclimate research in East Asia. In this study, we reconstructed the environmental evolution of the Lake Qinghai since ∼9 ka by using a high-resolution peat...
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Frontiers Media S.A.
2023-05-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2023.1125302/full |
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| author | Chen Wang Yahui Qiu Yahui Qiu Fenglei Fan Fenglei Fan Baosheng Li Dongfeng Niu Peixian Shu Peixian Shu Peixian Shu |
| author_facet | Chen Wang Yahui Qiu Yahui Qiu Fenglei Fan Fenglei Fan Baosheng Li Dongfeng Niu Peixian Shu Peixian Shu Peixian Shu |
| author_sort | Chen Wang |
| collection | DOAJ |
| description | The Lake Qinghai Basin is sensitive to global and regional climate change because of its unique geographical location. It is the hotspot for paleoclimate research in East Asia. In this study, we reconstructed the environmental evolution of the Lake Qinghai since ∼9 ka by using a high-resolution peat and fluvial-lacustrine record (Laoyinggou profile) obtained at the foot of Nanshan Mountain. Based on 8 AMS14C dates and lithology, loss on ignition (LOI), total organic matter (TOC), X-ray fluorescence (XRF) core-scanning measurements, ratio of total organic carbon to nitrogen (TOC/TN), and sediment particle sorting coefficients, we show that during the Middle Holocene (∼9–4.4 ka BP) this region was primarily dominated by the Asian summer monsoon, with a consistent, warm, and humid environment. By contrast, during the late Holocene (4.4 ka to present), the climatic context in this area fluctuated dramatically at the millennial scales. The low TOC content, lower TOC/TN ration and strong hydroclimatic indicate six rapid climate change events, which occurred at ∼4.0 ka, ∼3.6 ka, ∼3.2 ka, ∼2.8 ka, ∼2.1 ka, and ∼1.4 ka, all of which coincided to cold episodes in the North Atlantic Ocean. |
| first_indexed | 2024-03-13T08:17:57Z |
| format | Article |
| id | doaj.art-a5e1e2e235894ca18c510fa3513be733 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-03-13T08:17:57Z |
| publishDate | 2023-05-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-a5e1e2e235894ca18c510fa3513be7332023-05-31T14:58:08ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632023-05-011110.3389/feart.2023.11253021125302Rapid environmental changes in the Lake Qinghai basin during the late HoloceneChen Wang0Yahui Qiu1Yahui Qiu2Fenglei Fan3Fenglei Fan4Baosheng Li5Dongfeng Niu6Peixian Shu7Peixian Shu8Peixian Shu9School of Ecology and Environment, Tibet University, Lhasa, Tibet, ChinaSchool of Cultural Heritage, Northwest University, Xi’an, ChinaMinistry of Education Key Laboratory of Cultural Heritage Studies and Conservation, Northwest University, Xi’an, ChinaJoint Laboratory of Plateau Surface Remote Sensing, Tibet University, Lhasa, Tibet, ChinaSchool of Geography, South China Normal University, Guangzhou, ChinaSchool of Geography, South China Normal University, Guangzhou, ChinaSchool of Geography, Lingnan Normal University, Zhanjiang, ChinaState Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, ChinaCenter for Excellence in Quaternary Science and Global Change, Chinese Academy of Sciences, Xi’an, ChinaShaanxi Key Laboratory of Accelerator Mass Spectrometry Technology and Application, Xi’an, ChinaThe Lake Qinghai Basin is sensitive to global and regional climate change because of its unique geographical location. It is the hotspot for paleoclimate research in East Asia. In this study, we reconstructed the environmental evolution of the Lake Qinghai since ∼9 ka by using a high-resolution peat and fluvial-lacustrine record (Laoyinggou profile) obtained at the foot of Nanshan Mountain. Based on 8 AMS14C dates and lithology, loss on ignition (LOI), total organic matter (TOC), X-ray fluorescence (XRF) core-scanning measurements, ratio of total organic carbon to nitrogen (TOC/TN), and sediment particle sorting coefficients, we show that during the Middle Holocene (∼9–4.4 ka BP) this region was primarily dominated by the Asian summer monsoon, with a consistent, warm, and humid environment. By contrast, during the late Holocene (4.4 ka to present), the climatic context in this area fluctuated dramatically at the millennial scales. The low TOC content, lower TOC/TN ration and strong hydroclimatic indicate six rapid climate change events, which occurred at ∼4.0 ka, ∼3.6 ka, ∼3.2 ka, ∼2.8 ka, ∼2.1 ka, and ∼1.4 ka, all of which coincided to cold episodes in the North Atlantic Ocean.https://www.frontiersin.org/articles/10.3389/feart.2023.1125302/fullLake Qinghai basinhigh-resolution recordrapid climate change (RCC)late Holocenecold events |
| spellingShingle | Chen Wang Yahui Qiu Yahui Qiu Fenglei Fan Fenglei Fan Baosheng Li Dongfeng Niu Peixian Shu Peixian Shu Peixian Shu Rapid environmental changes in the Lake Qinghai basin during the late Holocene Frontiers in Earth Science Lake Qinghai basin high-resolution record rapid climate change (RCC) late Holocene cold events |
| title | Rapid environmental changes in the Lake Qinghai basin during the late Holocene |
| title_full | Rapid environmental changes in the Lake Qinghai basin during the late Holocene |
| title_fullStr | Rapid environmental changes in the Lake Qinghai basin during the late Holocene |
| title_full_unstemmed | Rapid environmental changes in the Lake Qinghai basin during the late Holocene |
| title_short | Rapid environmental changes in the Lake Qinghai basin during the late Holocene |
| title_sort | rapid environmental changes in the lake qinghai basin during the late holocene |
| topic | Lake Qinghai basin high-resolution record rapid climate change (RCC) late Holocene cold events |
| url | https://www.frontiersin.org/articles/10.3389/feart.2023.1125302/full |
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