Asymmetries in the moisture origin of Antarctic precipitation
The seasonality of moisture sources for precipitation in Antarctica is studied with a Lagrangian moisture source diagnostic. Moisture origin for precipitation in Antarctica has strongly asymmetric properties, which are related to the Antarctic topography, seasonal sea ice coverage, and the land/ocea...
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ftcaltechauth:oai:authors.library.caltech.edu:16908 2023-05-15T13:49:58+02:00 Asymmetries in the moisture origin of Antarctic precipitation Sodemann, Harald Stohl, Andreas 2009-11-20 application/pdf https://authors.library.caltech.edu/16908/ https://authors.library.caltech.edu/16908/1/Sodemann2009p6514Geophys_Res_Lett.pdf https://resolver.caltech.edu/CaltechAUTHORS:20091208-141655788 en eng American Geophysical Union https://authors.library.caltech.edu/16908/1/Sodemann2009p6514Geophys_Res_Lett.pdf Sodemann, Harald and Stohl, Andreas (2009) Asymmetries in the moisture origin of Antarctic precipitation. Geophysical Research Letters, 36 . Art. No. L22803. ISSN 0094-8276. doi:10.1029/2009GL040242. https://resolver.caltech.edu/CaltechAUTHORS:20091208-141655788 <https://resolver.caltech.edu/CaltechAUTHORS:20091208-141655788> other Article PeerReviewed 2009 ftcaltechauth https://doi.org/10.1029/2009GL040242 2021-11-11T18:43:40Z The seasonality of moisture sources for precipitation in Antarctica is studied with a Lagrangian moisture source diagnostic. Moisture origin for precipitation in Antarctica has strongly asymmetric properties, which are related to the Antarctic topography, seasonal sea ice coverage, and the land/ocean contrasts in the mid-latitudes of the southern hemisphere. The highest altitudes of the East Antarctic ice shield, where major ice cores have been drilled, have mean source latitudes of 45–40°S year-round. This finding contrasts to results from previous Lagrangian studies which detected a more southerly moisture origin due to too short trajectories. Now, results from Lagrangian moisture source diagnostics are consistent with findings from general circulation models with tagged tracers. Thus, both approaches can serve as a common benchmark for the interpretation of moisture source indicators based on stable isotopes, such as deuterium excess, in Antarctic ice cores. Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice Caltech Authors (California Institute of Technology) Antarctic The Antarctic Geophysical Research Letters 36 22 |
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Caltech Authors (California Institute of Technology) |
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English |
description |
The seasonality of moisture sources for precipitation in Antarctica is studied with a Lagrangian moisture source diagnostic. Moisture origin for precipitation in Antarctica has strongly asymmetric properties, which are related to the Antarctic topography, seasonal sea ice coverage, and the land/ocean contrasts in the mid-latitudes of the southern hemisphere. The highest altitudes of the East Antarctic ice shield, where major ice cores have been drilled, have mean source latitudes of 45–40°S year-round. This finding contrasts to results from previous Lagrangian studies which detected a more southerly moisture origin due to too short trajectories. Now, results from Lagrangian moisture source diagnostics are consistent with findings from general circulation models with tagged tracers. Thus, both approaches can serve as a common benchmark for the interpretation of moisture source indicators based on stable isotopes, such as deuterium excess, in Antarctic ice cores. |
format |
Article in Journal/Newspaper |
author |
Sodemann, Harald Stohl, Andreas |
spellingShingle |
Sodemann, Harald Stohl, Andreas Asymmetries in the moisture origin of Antarctic precipitation |
author_facet |
Sodemann, Harald Stohl, Andreas |
author_sort |
Sodemann, Harald |
title |
Asymmetries in the moisture origin of Antarctic precipitation |
title_short |
Asymmetries in the moisture origin of Antarctic precipitation |
title_full |
Asymmetries in the moisture origin of Antarctic precipitation |
title_fullStr |
Asymmetries in the moisture origin of Antarctic precipitation |
title_full_unstemmed |
Asymmetries in the moisture origin of Antarctic precipitation |
title_sort |
asymmetries in the moisture origin of antarctic precipitation |
publisher |
American Geophysical Union |
publishDate |
2009 |
url |
https://authors.library.caltech.edu/16908/ https://authors.library.caltech.edu/16908/1/Sodemann2009p6514Geophys_Res_Lett.pdf https://resolver.caltech.edu/CaltechAUTHORS:20091208-141655788 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Antarctica Sea ice |
genre_facet |
Antarc* Antarctic Antarctica Sea ice |
op_relation |
https://authors.library.caltech.edu/16908/1/Sodemann2009p6514Geophys_Res_Lett.pdf Sodemann, Harald and Stohl, Andreas (2009) Asymmetries in the moisture origin of Antarctic precipitation. Geophysical Research Letters, 36 . Art. No. L22803. ISSN 0094-8276. doi:10.1029/2009GL040242. https://resolver.caltech.edu/CaltechAUTHORS:20091208-141655788 <https://resolver.caltech.edu/CaltechAUTHORS:20091208-141655788> |
op_rights |
other |
op_doi |
https://doi.org/10.1029/2009GL040242 |
container_title |
Geophysical Research Letters |
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36 |
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22 |
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1766252669850091520 |