Reconstruction of precipitation δ 18 O over the Tibetan Plateau since 1910

• Published in: Journal of Geophysical Research: Atmospheres
• Main Authors: Gao, Jing, Shen, Samuel S. P., Yao, Tandong, Tafolla, Nancy, Risi, Camille, He, You
• Other Authors: Laboratoire de Météorologie Dynamique (UMR 8539) (LMD), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris, École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2015
• Subjects: precipitation δ18O; ice cores; reconstructed δ18O data; Tibetan Plateau; δ18O spectral optimal gridding; Earth Science; [SDU]Sciences of the Universe [physics]; Sog; ice core
• Online Access: https://hal.science/hal-04114790; https://hal.science/hal-04114790/document; https://hal.science/hal-04114790/file/JGR%20Atmospheres%20-%202015%20-%20Gao%20-%20Reconstruction%20of%20precipitation%2018O%20over%20the%20Tibetan%20Plateau%20since%201910.pdf; https://doi.org/10.1002/2015JD023233

International audience 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 δ 18 O 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 δ 18 O data of 10 ice cores over TP against the EOF basis functions. The reconstructed data can effectively demonstrate spatiotemporal characteristics of TP precipitation δ 18 O. The spatial average interannual δ 18 O anomalies agree well with the time series of Guliya ice core δ 18 O, implying Guliya δ 18 O's typical representation of the TP δ 18 O temporal variation.