Changes in below‐cloud evaporation affect precipitation isotopes during five decades of warming across China

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dc.contributor.authorWang, SJen_AU
dc.contributor.authorJiao, Ren_AU
dc.contributor.authorZhang, MJen_AU
dc.contributor.authorCrawford, Jen_AU
dc.contributor.authorHughes, CEen_AU
dc.contributor.authorChen, FLen_AU
dc.date.accessioned2021-04-15T02:53:47Zen_AU
dc.date.available2021-04-15T02:53:47Zen_AU
dc.date.issued2021-03-28en_AU
dc.date.statistics2021-04-06en_AU
dc.description.abstractBased on daily meteorological records for 651 sites across China during the period 1960–2018, we estimated the changes in isotopic variations in raindrops as they descend from cloud base to ground over past decades, and tested the sensitivity of isotopic variations to climate parameters like air temperature and relative humidity. Air temperature correlates positively and relative humidity correlates negatively with below‐cloud isotopic variation. Generally, the below‐cloud evaporation effect on precipitation isotopes in the arid and semi‐arid regions of China is much greater than that in the humid and semi‐humid regions, although the impact might be reduced under cold‐arid or hot‐humid conditions. With aridity increasing with distance from the coast, the continental effect of precipitation isotopes is modified due to the below‐cloud evaporation. The seasonal pattern of the measured isotopic composition in precipitation near the ground and estimated at cloud base, is still similar in most regions, although the seasonal range is higher at the ground. During the last five decades, the below‐cloud evaporation effect has enhanced for the cold and arid regions of China especially across Qinghai‐Tibet Plateau and Inner Mongolia, due to combined effects of increasing air temperature and decreasing relative humidity. Although the below‐cloud evaporation effect is not always the dominant factor influencing the variability of stable isotopes, it needs to be considered as one of the contributing factors. This enhanced effect may impact the interpretation of past climate based on stable water isotopes, particularly in paleoclimate studies using speleothems and tree rings. © 2021. American Geophysical Unionen_AU
dc.identifier.articlenumbere2020JD033075en_AU
dc.identifier.citationWang, S., Jiao, R., Zhang, M., Crawford, J., Hughes, C. E., & Chen, F. (2021). Changes in below-cloud evaporation affect precipitation isotopes during five decades of warming across China. Journal of Geophysical Research: Atmospheres, 126(7), e2020JD033075. doi:10.1029/2020JD033075en_AU
dc.identifier.issn2169-8996en_AU
dc.identifier.issue7en_AU
dc.identifier.journaltitleJournal of Geophysical Research: Atmospheresen_AU
dc.identifier.urihttps://doi.org/10.1029/2020JD033075en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/10650en_AU
dc.identifier.volume126en_AU
dc.language.isoenen_AU
dc.publisherAmerican Geophysical Unionen_AU
dc.subjectMeteorologyen_AU
dc.subjectRecords managementen_AU
dc.subjectRainen_AU
dc.subjectCloudsen_AU
dc.subjectVariationsen_AU
dc.subjectAmbient temperatureen_AU
dc.subjectHumidityen_AU
dc.subjectChinaen_AU
dc.subjectTibeten_AU
dc.subjectStable isotopesen_AU
dc.titleChanges in below‐cloud evaporation affect precipitation isotopes during five decades of warming across Chinaen_AU
dc.typeJournal Articleen_AU
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