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Variability of Isotope Composition of Precipitation in the Southeastern Tibetan Plateau from the Synoptic to Seasonal Time Scale
Shi, Xiaoyi1,2,3; Risi, Camille4; Pu, Tao3; Lacour, Jean-Lionel5; Kong, Yanlong6; Wang, Ke6; He, Yuanqing1,3; Xia, Dunsheng1
2020-03-27
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN2169-897X
Volume125Issue:6Pages:26
AbstractDaily precipitation samples were collected at four sites in Mount Yulong and Mount Meili regions of southeastern Tibetan Plateau and analyzed for isotopic composition. Combined with water vapor isotopic composition derived from satellites data (Infrared Atmospheric Sounding Interferometer, Tropospheric Emission Spectrometer, and Greenhouse gases Observing Satellite), the factors controlling the variability in the isotopic composition of precipitation are investigated at the synoptic, intraseasonal, and seasonal time scales. At the seasonal scale, the isotope composition in precipitation is controlled by processes along air mass trajectories affecting the water vapor at the large scale (>200 km), especially upstream deep convection and air mass origin, and by local processes transforming the large-scale water vapor isotopic composition into the precipitation composition, especially rain evaporation and local circulation. At the intraseasonal and synoptic scales, the isotope composition in precipitation is mainly controlled by these local processes. The shorter the time scale of isotopic variations, the smaller the spatial imprint of these variations. The fact that different factors control the isotopic variability at different time scales calls for caution when applying relationships observed at these time scales to interpret isotopic variations at paleoclimatic time scales. While general circulation models successfully capture the isotopic variability and its controlling factors at the seasonal scale, it fails to simulate them at shorter time scales, because it fails to simulate the local processes. Plain Language Summary Water molecules can be light (one oxygen atom and two hydrogen atoms) or heavy (one hydrogen atom is replaced by a deuterium atom). These different molecules are called water isotopes. The isotopic composition of precipitation, when recorded in ice cores, can provide information about past climate. In southeastern TP ice cores, the isotopic records have been interpreted as reflecting past variations in temperature,or as reflecting past variations in monsoon strength. This illustrates that we need to better understand what processes control the isotopic composition of precipitation. We investigate the processes at the seasonal (>1 month), intraseasonal (10-30 days), and synoptic (<10 days) time scales. We use precipitation samples collected in the southeastern TP and satellite retrievals of water vapor isotope. We show that storm activity along air mass trajectories is an important factor controlling isotopic variations at the seasonal scale. But local processes, such as the evaporation of rain drops or local winds, are also important, especially at shorter time scales. The fact that the processes control the isotopic composition of precipitation depend on the time scale calls for caution when applying the factors observed in present-day variability to interpret isotopic ice core records at very long time scales.
Keywordprecipitation isotopes vapor isotopes isotopic modeling Tibetan Plateau
DOI10.1029/2019JD031751
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Cryospheric Sciences ; State Key Laboratory of Cryospheric Sciences ; Isotopic Hydrology Programme at the International Atomic Energy Agency ; Isotopic Hydrology Programme at the International Atomic Energy Agency ; China Scholarship Council ; China Scholarship Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Cryospheric Sciences ; State Key Laboratory of Cryospheric Sciences ; Isotopic Hydrology Programme at the International Atomic Energy Agency ; Isotopic Hydrology Programme at the International Atomic Energy Agency ; China Scholarship Council ; China Scholarship Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Cryospheric Sciences ; State Key Laboratory of Cryospheric Sciences ; Isotopic Hydrology Programme at the International Atomic Energy Agency ; Isotopic Hydrology Programme at the International Atomic Energy Agency ; China Scholarship Council ; China Scholarship Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Cryospheric Sciences ; State Key Laboratory of Cryospheric Sciences ; Isotopic Hydrology Programme at the International Atomic Energy Agency ; Isotopic Hydrology Programme at the International Atomic Energy Agency ; China Scholarship Council ; China Scholarship Council
WOS KeywordWATER-VAPOR ; STABLE-ISOTOPE ; ICE-CORE ; DELTA-D ; ASIAN MONSOON ; OXYGEN-ISOTOPE ; INTERANNUAL VARIATIONS ; ATMOSPHERIC CONTROLS ; MOISTURE TRANSPORT ; SOUTHWEST MONSOON
Language英语
Funding ProjectNational Natural Science Foundation of China[91647101] ; National Natural Science Foundation of China[41401083] ; State Key Laboratory of Cryospheric Sciences[SKLCS-ZZ-2020] ; State Key Laboratory of Cryospheric Sciences[SKLCS-OP-2019-10] ; Isotopic Hydrology Programme at the International Atomic Energy Agency ; China Scholarship Council[201806180069]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Cryospheric Sciences ; State Key Laboratory of Cryospheric Sciences ; Isotopic Hydrology Programme at the International Atomic Energy Agency ; Isotopic Hydrology Programme at the International Atomic Energy Agency ; China Scholarship Council ; China Scholarship Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Cryospheric Sciences ; State Key Laboratory of Cryospheric Sciences ; Isotopic Hydrology Programme at the International Atomic Energy Agency ; Isotopic Hydrology Programme at the International Atomic Energy Agency ; China Scholarship Council ; China Scholarship Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Cryospheric Sciences ; State Key Laboratory of Cryospheric Sciences ; Isotopic Hydrology Programme at the International Atomic Energy Agency ; Isotopic Hydrology Programme at the International Atomic Energy Agency ; China Scholarship Council ; China Scholarship Council ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Cryospheric Sciences ; State Key Laboratory of Cryospheric Sciences ; Isotopic Hydrology Programme at the International Atomic Energy Agency ; Isotopic Hydrology Programme at the International Atomic Energy Agency ; China Scholarship Council ; China Scholarship Council
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences
WOS IDWOS:000529111600024
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/96731
Collection页岩气与地质工程院重点实验室
Corresponding AuthorShi, Xiaoyi
Affiliation1.Lanzhou Univ, Coll Earth & Environm Sci, MOE Key Lab West Chinas Environm Syst, Lanzhou, Peoples R China
2.Sorbonne Univ, Lab Meteorol Dynam, IPSL, Paris, France
3.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou, Peoples R China
4.Sorbonne Univ, CNRS, IPSL, Lab Meteorol Dynam, Paris, France
5.Univ Iceland, Inst Earth Sci, Reykjavik, Iceland
6.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Shi, Xiaoyi,Risi, Camille,Pu, Tao,et al. Variability of Isotope Composition of Precipitation in the Southeastern Tibetan Plateau from the Synoptic to Seasonal Time Scale[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2020,125(6):26.
APA Shi, Xiaoyi.,Risi, Camille.,Pu, Tao.,Lacour, Jean-Lionel.,Kong, Yanlong.,...&Xia, Dunsheng.(2020).Variability of Isotope Composition of Precipitation in the Southeastern Tibetan Plateau from the Synoptic to Seasonal Time Scale.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,125(6),26.
MLA Shi, Xiaoyi,et al."Variability of Isotope Composition of Precipitation in the Southeastern Tibetan Plateau from the Synoptic to Seasonal Time Scale".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 125.6(2020):26.
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