Reconstruction of precipitation δ18O over the Tibetan Plateau since 1910
Résumé
An accurate representation of the spatiotemporal variation of stable isotopes in precipitation over the Tibetan Plateau (TP) is critical information for hydrological and ecological applications for the region. This paper reconstructs annual δ18O data with 2.5° × 3.75° latitude-longitude resolutions over the TP since 1910 using the spectral optimal gridding (SOG) method. The SOG calculates empirical orthogonal functions (EOFs) from the Laboratoire de Météorologie Dynamique isotopic version general circulation model over the TP from 1978 to 2007 and regresses the δ18O data of 10 ice cores over TP against the EOF basis functions. The reconstructed data can effectively demonstrate spatiotemporal characteristics of TP precipitation δ18O. The spatial average interannual δ18O anomalies agree well with the time series of Guliya ice core δ18O, implying Guliya δ18O's typical representation of the TP δ18O temporal variation.
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JGR Atmospheres - 2015 - Gao - Reconstruction of precipitation 18O over the Tibetan Plateau since 1910.pdf (1.81 Mo)
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