Circumglobal response to prescribed soil moisture over North America
A series of idealized prescribed soil moisture experiments is performed with the atmosphere/land stand-alone configuration of the Community Earth System Model, version 1, in an effort to find sources of predictability for high-impact stationary wave anomalies observed in recent boreal summers. We ar...
Published in: | Journal of Climate |
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Language: | English |
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Online Access: | https://doi.org/10.1175/JCLI-D-18-0823.1 |
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ftncar:oai:drupal-site.org:articles_22611 2023-09-05T13:21:33+02:00 Circumglobal response to prescribed soil moisture over North America Teng, Haiyan (author) Branstator, Grant (author) Tawfik, Ahmed B. (author) Callaghan, Patrick (author) 2019-07-01 https://doi.org/10.1175/JCLI-D-18-0823.1 en eng Journal of Climate--J. Climate--0894-8755--1520-0442 articles:22611 ark:/85065/d7c82ddd doi:10.1175/JCLI-D-18-0823.1 Copyright 2019 American Geophysical Union. article Text 2019 ftncar https://doi.org/10.1175/JCLI-D-18-0823.1 2023-08-14T18:49:34Z A series of idealized prescribed soil moisture experiments is performed with the atmosphere/land stand-alone configuration of the Community Earth System Model, version 1, in an effort to find sources of predictability for high-impact stationary wave anomalies observed in recent boreal summers. We arbitrarily prescribe soil water to have a zero value at selected domains in the continental United States and run 100-member ensembles to examine the monthly and seasonal mean response. Contrary to the lack of a substantial response in the boreal winter, the summertime circulation response is robust, consistent, and circumglobal. While the stationary wave response over the North America and North Atlantic sectors can be well explained by the reaction of a linear dynamical system to heating anomalies caused by the imposed dry land surface, nonlinear processes involving synoptic eddies play a crucial role in forming the remote response in Eurasia and the North Pacific Ocean. A number of other possible factors contributing to the circulation responses are also discussed. Overall, the experiments suggest that, in the boreal summer, soil moisture may contribute to the predictability of high-impact stationary wave events, which can impact regions that are great distances from these source regions. NA14OAR4310224 Article in Journal/Newspaper North Atlantic OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) Pacific Journal of Climate 32 14 4525 4545 |
institution |
Open Polar |
collection |
OpenSky (NCAR/UCAR - National Center for Atmospheric Research/University Corporation for Atmospheric Research) |
op_collection_id |
ftncar |
language |
English |
description |
A series of idealized prescribed soil moisture experiments is performed with the atmosphere/land stand-alone configuration of the Community Earth System Model, version 1, in an effort to find sources of predictability for high-impact stationary wave anomalies observed in recent boreal summers. We arbitrarily prescribe soil water to have a zero value at selected domains in the continental United States and run 100-member ensembles to examine the monthly and seasonal mean response. Contrary to the lack of a substantial response in the boreal winter, the summertime circulation response is robust, consistent, and circumglobal. While the stationary wave response over the North America and North Atlantic sectors can be well explained by the reaction of a linear dynamical system to heating anomalies caused by the imposed dry land surface, nonlinear processes involving synoptic eddies play a crucial role in forming the remote response in Eurasia and the North Pacific Ocean. A number of other possible factors contributing to the circulation responses are also discussed. Overall, the experiments suggest that, in the boreal summer, soil moisture may contribute to the predictability of high-impact stationary wave events, which can impact regions that are great distances from these source regions. NA14OAR4310224 |
author2 |
Teng, Haiyan (author) Branstator, Grant (author) Tawfik, Ahmed B. (author) Callaghan, Patrick (author) |
format |
Article in Journal/Newspaper |
title |
Circumglobal response to prescribed soil moisture over North America |
spellingShingle |
Circumglobal response to prescribed soil moisture over North America |
title_short |
Circumglobal response to prescribed soil moisture over North America |
title_full |
Circumglobal response to prescribed soil moisture over North America |
title_fullStr |
Circumglobal response to prescribed soil moisture over North America |
title_full_unstemmed |
Circumglobal response to prescribed soil moisture over North America |
title_sort |
circumglobal response to prescribed soil moisture over north america |
publishDate |
2019 |
url |
https://doi.org/10.1175/JCLI-D-18-0823.1 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Journal of Climate--J. Climate--0894-8755--1520-0442 articles:22611 ark:/85065/d7c82ddd doi:10.1175/JCLI-D-18-0823.1 |
op_rights |
Copyright 2019 American Geophysical Union. |
op_doi |
https://doi.org/10.1175/JCLI-D-18-0823.1 |
container_title |
Journal of Climate |
container_volume |
32 |
container_issue |
14 |
container_start_page |
4525 |
op_container_end_page |
4545 |
_version_ |
1776202150442958848 |