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Volume 40 Issue 6
Dec.  2021
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Article Navigation >  CARSOLOGICA SINICA  > 2021  >  40(6): 914-919
WANG Quan,YUAN Shayue,ZHAI Xiumin,et al.Reanalysis of interannual variability of precipitation δ18O in southern China in response to ENSO[J].Carsologica Sinica,2021,40(06):914-919. doi: 10.11932/karst20210602
Citation: WANG Quan,YUAN Shayue,ZHAI Xiumin,et al.Reanalysis of interannual variability of precipitation δ18O in southern China in response to ENSO[J].Carsologica Sinica,2021,40(06):914-919. doi: 10.11932/karst20210602
shu

Reanalysis of interannual variability of precipitation δ18O in southern China in response to ENSO

doi: 10.11932/karst20210602
  • 1.

    School of Geography and Tourism，Chongqing Normal University，Chongqing 401331， China

  • 2.

    Chongqing Key Laboratory of Wetland Science Research of the Upper Reaches of the Yangtze River，Chongqing 401331， China

  • 3.

    School of Geography，Nanjing Normal University，Nanjing，Jiangsu 210023， China

  • 4.

    Institute of Karst Geology，CAGS/ Key Laboratory of Karst Dynamics，MNR & GZAR，Guilin，Guangxi 541004， China

  • 5.

    State Key Laboratory of Loess and Quaternary Geology，Institute of Earth Environment，Chinese Academy of Sciences，Xi’an，Shaanxi 710061， China

Funds:

 SKLLQG1922

 KJQN201900536

 cstc2020jcyj-msxmX0598

 42002200

 2014005, 2014034, 2016011

 DD20190672

  • Received Date: 2021-04-30
  • Publish Date: 2021-12-25
    Abstract
  • Oxygen isotope records （δ18O） obtained from stalagmites in southern China are valuable proxy data for paleomonsoon reconstruction. However， the interpretation of the stalagmite δ18O records remains an ongoing debate. Based on simulation data and meteorological observation data， we present the interannual variability of precipitation δ18O series of 16 major cities in southern China from 1979 to 2016 and extract the first principal component（PC1）of these δ18O series by using principal component analysis. Overall，the PC1 shows a significantly positive correlation with the Ocean Nino Index（r=0.74，P<0.01，n=38），indicating that El Niño-Southern Oscillation（ENSO）has a significant impact on the interannual variability of precipitation δ18O in southern China. Further analysis shows that ENSO affects the precipitation δ18O by controlling the convective activities over the Bay of Bengal and the South China Sea and the intensity of the west Pacific subtropical high， but the effect of the convective activities over the primary moisture regions may be stronger. In addition， the correlation between precipitation δ18O and ENSO is not stable during different periods， which will lead to large uncertainties in ENSO reconstruction based on stalagmites δ18O records in Asian Monsoon regions.

     

    • WANG Quan,YUAN Shayue,ZHAI Xiumin,et al.Reanalysis of interannual variability of precipitation δ18O in southern China in response to ENSO[J].Carsologica Sinica,2021,40(06):914-919.
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