Evaluating a moist isentropic framework for poleward moisture transport: Implications for water isotopes over Antarctica
The ability to identify moisture source regions and sinks and to model the transport pathways that link them in simple yet physical ways is critical for understanding climate today and in the past. Using water tagging and isotopic tracer experiments in the Community Earth System Model, this work sho...
Published in: | Geophysical Research Letters |
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Language: | English |
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2019
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Online Access: | https://doi.org/10.1029/2019GL082965 |
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ftncar:oai:drupal-site.org:articles_22685 2023-07-30T03:58:55+02:00 Evaluating a moist isentropic framework for poleward moisture transport: Implications for water isotopes over Antarctica Bailey, Adriana (author) Singh, Hansi K. A. (author) Nusbaumer, Jesse (author) 2019-07-10 https://doi.org/10.1029/2019GL082965 en eng Geophysical Research Letters--Geophys. Res. Lett.--0094-8276--1944-8007 articles:22685 ark:/85065/d70r9shc doi:10.1029/2019GL082965 Copyright 2019 American Geophysical Union. article Text 2019 ftncar https://doi.org/10.1029/2019GL082965 2023-07-17T18:26:07Z The ability to identify moisture source regions and sinks and to model the transport pathways that link them in simple yet physical ways is critical for understanding climate today and in the past. Using water tagging and isotopic tracer experiments in the Community Earth System Model, this work shows that poleward moisture transport largely follows surfaces of constant moist entropy. The analysis not only provides insight into why distinct zonal bands supply moisture to high‐ and low‐elevation polar sites but also explains why changes in these source regions are inherently linked to changes in temperature and rainout. Moreover, because the geometry, and specifically length, of the moist isentropic surfaces describes how much integrated rainout occurs, the analysis provides a physical framework for interpreting the isotopic composition of water in poleward‐moving air, thus indicating how variations in moisture transport might influence Antarctic ice cores. 1852977 Article in Journal/Newspaper Antarc* Antarctic Antarctica OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Antarctic Geophysical Research Letters 46 13 7819 7827 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
The ability to identify moisture source regions and sinks and to model the transport pathways that link them in simple yet physical ways is critical for understanding climate today and in the past. Using water tagging and isotopic tracer experiments in the Community Earth System Model, this work shows that poleward moisture transport largely follows surfaces of constant moist entropy. The analysis not only provides insight into why distinct zonal bands supply moisture to high‐ and low‐elevation polar sites but also explains why changes in these source regions are inherently linked to changes in temperature and rainout. Moreover, because the geometry, and specifically length, of the moist isentropic surfaces describes how much integrated rainout occurs, the analysis provides a physical framework for interpreting the isotopic composition of water in poleward‐moving air, thus indicating how variations in moisture transport might influence Antarctic ice cores. 1852977 |
author2 |
Bailey, Adriana (author) Singh, Hansi K. A. (author) Nusbaumer, Jesse (author) |
format |
Article in Journal/Newspaper |
title |
Evaluating a moist isentropic framework for poleward moisture transport: Implications for water isotopes over Antarctica |
spellingShingle |
Evaluating a moist isentropic framework for poleward moisture transport: Implications for water isotopes over Antarctica |
title_short |
Evaluating a moist isentropic framework for poleward moisture transport: Implications for water isotopes over Antarctica |
title_full |
Evaluating a moist isentropic framework for poleward moisture transport: Implications for water isotopes over Antarctica |
title_fullStr |
Evaluating a moist isentropic framework for poleward moisture transport: Implications for water isotopes over Antarctica |
title_full_unstemmed |
Evaluating a moist isentropic framework for poleward moisture transport: Implications for water isotopes over Antarctica |
title_sort |
evaluating a moist isentropic framework for poleward moisture transport: implications for water isotopes over antarctica |
publishDate |
2019 |
url |
https://doi.org/10.1029/2019GL082965 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
Geophysical Research Letters--Geophys. Res. Lett.--0094-8276--1944-8007 articles:22685 ark:/85065/d70r9shc doi:10.1029/2019GL082965 |
op_rights |
Copyright 2019 American Geophysical Union. |
op_doi |
https://doi.org/10.1029/2019GL082965 |
container_title |
Geophysical Research Letters |
container_volume |
46 |
container_issue |
13 |
container_start_page |
7819 |
op_container_end_page |
7827 |
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1772809636543463424 |