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Holocene carbon acc...
Holocene carbon accumulation in lakes of the current east Asian monsoonal margin: Implications under a changing climate
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- Hao, Qian (författare)
- Tianjin University, China
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- Yang, Shilei (författare)
- Tianjin University, China
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- Song, Zhaoliang (författare)
- Tianjin University, China
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- Ran, Xiangbin (författare)
- State Oceanic Administration, China
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- Yu, Changxun, 1983- (författare)
- Linnéuniversitetet,Institutionen för biologi och miljö (BOM)
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- Chen, Chunmei (författare)
- Tianjin University, China
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- Van Zwieten, Lukas (författare)
- New South Wales Department of Primary Industries, Australia
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- Quine, Timothy A. (författare)
- University of Exeter, UK
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- Liu, Hongyan (författare)
- Peking University, China
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- Wang, Zhengang (författare)
- Sun Yat-Sen University, China
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- Wang, Hailong (författare)
- Foshan University, China;Zhejiang A&F University, China
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(creator_code:org_t)
- Elsevier, 2020
- 2020
- Engelska.
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Ingår i: Science of the Total Environment. - : Elsevier. - 0048-9697 .- 1879-1026. ; 737, s. 1-13
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Carbon (C) present in lake sediments is an important global sink for CO2; however, an in-depth understanding of the impact of climate variability and the associated changes in vegetation on sediment C dynamics is still lacking. A total of 13 lakes were studied to quantify the influence of climate and vegetation on the reconstructed Holocene C accumulation rate (CAR) in lake sediments of the modern East Asian monsoonal margin. The corresponding paleoclimate information was assessed, including the temperature (30–90°N in the Northern Hemisphere) and precipitation (indicated by the δ18O of the Sanbao, Dongge, and Hulu caves). The Holocene vegetation conditions were inferred by pollen records, including arboreal pollen/non-arboreal pollen and pollen percentages. The results showed that the peak CAR occurred during the mid-Holocene, coinciding with the strongest period of the East Asian summer monsoon and expansion of forests. Lakes in the temperate steppe (TS) regions had a mean CAR of 13.41 ± 0.88 g C m−2 yr−1, which was significantly greater than the CARs of temperate desert (TD) and highland meadow/steppe (HMS; 6.76 ± 0.29 and 7.39 ± 0.73 g C m−2 yr−1, respectively). The major influencing factor for the TS sub-region was vegetation dynamics, especially the proportion of arboreal vegetation, while temperature and vegetation coverage were more important for the HMS. These findings indicate that C accumulation in lake sediments is linked with climate and vegetation changes over long timescales; however, there was notable spatial heterogeneity in the CARs, such as opposing temporal changes and different major influencing factors among the three sub-regions during the mid-Holocene. Aridification and forest loss would decrease C storage. However, prediction of C accumulation remains difficult because of the spatial heterogeneity in CARs and the interaction between the CAR and various factors under future climate change conditions.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences (hsv//eng)
Nyckelord
- Carbon sequestration
- Pollen records
- Temperate steppe
- Temperate desert
- Highland meadow/steppe
- Miljövetenskap
- Environmental Science
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Hao, Qian
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Yang, Shilei
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Song, Zhaoliang
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Ran, Xiangbin
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Yu, Changxun, 19 ...
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Chen, Chunmei
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Van Zwieten, Luk ...
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Quine, Timothy A ...
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Liu, Hongyan
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Wang, Zhengang
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Wang, Hailong
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