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Sökning: id:"swepub:oai:DiVA.org:lnu-96155" > Holocene carbon acc...

  • Hao, QianTianjin University, China (författare)

Holocene carbon accumulation in lakes of the current east Asian monsoonal margin: Implications under a changing climate

  • Artikel/kapitelEngelska2020

Förlag, utgivningsår, omfång ...

  • Elsevier,2020
  • printrdacarrier

Nummerbeteckningar

  • LIBRIS-ID:oai:DiVA.org:lnu-96155
  • https://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-96155URI
  • https://doi.org/10.1016/j.scitotenv.2020.139723DOI

Kompletterande språkuppgifter

  • Språk:engelska
  • Sammanfattning på:engelska

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Klassifikation

  • Ämneskategori:ref swepub-contenttype
  • Ämneskategori:art swepub-publicationtype

Anmärkningar

  • 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 och genrebeteckningar

Biuppslag (personer, institutioner, konferenser, titlar ...)

  • Yang, ShileiTianjin University, China (författare)
  • Song, ZhaoliangTianjin University, China (författare)
  • Ran, XiangbinState Oceanic Administration, China (författare)
  • Yu, Changxun,1983-Linnéuniversitetet,Institutionen för biologi och miljö (BOM)(Swepub:lnu)chyuaa (författare)
  • Chen, ChunmeiTianjin University, China (författare)
  • Van Zwieten, LukasNew South Wales Department of Primary Industries, Australia (författare)
  • Quine, Timothy A.University of Exeter, UK (författare)
  • Liu, HongyanPeking University, China (författare)
  • Wang, ZhengangSun Yat-Sen University, China (författare)
  • Wang, HailongFoshan University, China;Zhejiang A&F University, China (författare)
  • Tianjin University, ChinaState Oceanic Administration, China (creator_code:org_t)

Sammanhörande titlar

  • Ingår i:Science of the Total Environment: Elsevier737, s. 1-130048-96971879-1026

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