dc.contributor.author | Pang, Hongxi | |
dc.contributor.author | Zhang, Peng | |
dc.contributor.author | Wu, Shuangye | |
dc.contributor.author | Jouzel, Jean | |
dc.contributor.author | Steen-Larsen, Hans Christian | |
dc.contributor.author | Liu, Ke | |
dc.contributor.author | Zhang, Wangbin | |
dc.contributor.author | Yu, Jinhai | |
dc.contributor.author | An, Chunlei | |
dc.contributor.author | Chen, Deliang | |
dc.contributor.author | Hou, Shugui | |
dc.date.accessioned | 2022-10-18T09:12:23Z | |
dc.date.available | 2022-10-18T09:12:23Z | |
dc.date.created | 2022-10-04T09:23:13Z | |
dc.date.issued | 2022 | |
dc.identifier.issn | 2169-897X | |
dc.identifier.uri | https://hdl.handle.net/11250/3026578 | |
dc.description.abstract | Recent studies have suggested that water isotopologues in snow pits from remote East Antarctica can be influenced by the input of stratospheric water, which has anomalously high 17O-excess values. However, it remains unclear whether the 17O-excess records preserved in snow and ice from this region can be used to reconstruct stratosphere-troposphere exchange (STE). In this study, we present high-resolution 17O-excess records from two snow pits at Dome A, the highest point of the Antarctic ice sheet. The 17O-excess records show a significant positive correlation with the strength of the Brewer-Dobson circulation (BDC), the hemispheric-scale troposphere-stratosphere overturn circulation. Stronger BDC leads to more stratospheric water input over Antarctica and higher 17O-excess, and vice versa. In addition, the 17O-excess records also have a significant positive correlation with the Southern Annular Mode (SAM) index, because SAM modulates Antarctic precipitation, which has a dilution effect on the stratospheric water input. The 17O-excess records do not show significant correlations with local temperature and relative humidity in the moisture source region. These results suggest the dominant effect of BDC on 17O-excess and indicate the potential for using 17O-excess records in ice cores from remote sites in East Antarctica for reconstructing long-term variations of STE, and understanding their mechanisms and climate effects. | en_US |
dc.language.iso | eng | en_US |
dc.publisher | American Geophysical Union | en_US |
dc.title | The Dominant Role of Brewer-Dobson Circulation on 17O-Excess Variations in Snow Pits at Dome A, Antarctica | en_US |
dc.type | Journal article | en_US |
dc.type | Peer reviewed | en_US |
dc.description.version | publishedVersion | en_US |
dc.rights.holder | Copyright 2022 American Geophysical Union. All Rights Reserved. | en_US |
dc.source.articlenumber | e2022JD036559 | en_US |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 2 | |
dc.identifier.doi | 10.1029/2022JD036559 | |
dc.identifier.cristin | 2058171 | |
dc.source.journal | Journal of Geophysical Research (JGR): Atmospheres | en_US |
dc.identifier.citation | Journal of Geophysical Research (JGR): Atmospheres. 2022, 127 (13), e2022JD036559. | en_US |
dc.source.volume | 127 | en_US |
dc.source.issue | 13 | en_US |