Characterizing the Hadley circulation response through regional climate feedbacks
The robust weakening of the tropical atmospheric circulation in projections of anthropogenic warming is associated with substantial changes in regional and global climate. The present study focuses on understanding the response of the annual-mean Hadley circulation from a perspective of interactions...
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American Meteorological Society
2016
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Online Access: | https://authors.library.caltech.edu/62580/ https://authors.library.caltech.edu/62580/2/jcli-d-15-0424.1.pdf https://resolver.caltech.edu/CaltechAUTHORS:20151203-115517508 |
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ftcaltechauth:oai:authors.library.caltech.edu:62580 2023-05-15T18:18:24+02:00 Characterizing the Hadley circulation response through regional climate feedbacks Feldl, N. Bordoni, S. 2016-01 application/pdf https://authors.library.caltech.edu/62580/ https://authors.library.caltech.edu/62580/2/jcli-d-15-0424.1.pdf https://resolver.caltech.edu/CaltechAUTHORS:20151203-115517508 en eng American Meteorological Society https://authors.library.caltech.edu/62580/2/jcli-d-15-0424.1.pdf Feldl, N. and Bordoni, S. (2016) Characterizing the Hadley circulation response through regional climate feedbacks. Journal of Climate, 29 (2). pp. 613-622. ISSN 0894-8755. doi:10.1175/JCLI-D-15-0424.1. https://resolver.caltech.edu/CaltechAUTHORS:20151203-115517508 <https://resolver.caltech.edu/CaltechAUTHORS:20151203-115517508> other Article PeerReviewed 2016 ftcaltechauth https://doi.org/10.1175/JCLI-D-15-0424.1 2021-11-11T19:07:08Z The robust weakening of the tropical atmospheric circulation in projections of anthropogenic warming is associated with substantial changes in regional and global climate. The present study focuses on understanding the response of the annual-mean Hadley circulation from a perspective of interactions between climate feedbacks and tropical circulation. Simulations from an ensemble of coupled ocean–atmosphere models are used to quantify changes in Hadley cell strength in terms of feedbacks, radiative forcing, ocean heat uptake, atmospheric eddies, and gross moist stability. Climate feedbacks are calculated for the model integrations from phase 5 of CMIP (CMIP5) using radiative kernels. Tropical mean circulation is found to be reduced by up to 2.6% K^(−1) for an abrupt quadrupling of carbon dioxide concentration. The weakening is characterized by an increase in gross moist stability, by an increase in eddy heat flux, and by positive extratropical feedbacks, such as those associated with lapse rate and sea ice response. Understanding the impact of radiative feedbacks on the large-scale circulation provides a framework for constraining uncertainty in the dynamic climate response, including the hydrological cycle. Article in Journal/Newspaper Sea ice Caltech Authors (California Institute of Technology) Journal of Climate 29 2 613 622 |
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Caltech Authors (California Institute of Technology) |
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English |
description |
The robust weakening of the tropical atmospheric circulation in projections of anthropogenic warming is associated with substantial changes in regional and global climate. The present study focuses on understanding the response of the annual-mean Hadley circulation from a perspective of interactions between climate feedbacks and tropical circulation. Simulations from an ensemble of coupled ocean–atmosphere models are used to quantify changes in Hadley cell strength in terms of feedbacks, radiative forcing, ocean heat uptake, atmospheric eddies, and gross moist stability. Climate feedbacks are calculated for the model integrations from phase 5 of CMIP (CMIP5) using radiative kernels. Tropical mean circulation is found to be reduced by up to 2.6% K^(−1) for an abrupt quadrupling of carbon dioxide concentration. The weakening is characterized by an increase in gross moist stability, by an increase in eddy heat flux, and by positive extratropical feedbacks, such as those associated with lapse rate and sea ice response. Understanding the impact of radiative feedbacks on the large-scale circulation provides a framework for constraining uncertainty in the dynamic climate response, including the hydrological cycle. |
format |
Article in Journal/Newspaper |
author |
Feldl, N. Bordoni, S. |
spellingShingle |
Feldl, N. Bordoni, S. Characterizing the Hadley circulation response through regional climate feedbacks |
author_facet |
Feldl, N. Bordoni, S. |
author_sort |
Feldl, N. |
title |
Characterizing the Hadley circulation response through regional climate feedbacks |
title_short |
Characterizing the Hadley circulation response through regional climate feedbacks |
title_full |
Characterizing the Hadley circulation response through regional climate feedbacks |
title_fullStr |
Characterizing the Hadley circulation response through regional climate feedbacks |
title_full_unstemmed |
Characterizing the Hadley circulation response through regional climate feedbacks |
title_sort |
characterizing the hadley circulation response through regional climate feedbacks |
publisher |
American Meteorological Society |
publishDate |
2016 |
url |
https://authors.library.caltech.edu/62580/ https://authors.library.caltech.edu/62580/2/jcli-d-15-0424.1.pdf https://resolver.caltech.edu/CaltechAUTHORS:20151203-115517508 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
https://authors.library.caltech.edu/62580/2/jcli-d-15-0424.1.pdf Feldl, N. and Bordoni, S. (2016) Characterizing the Hadley circulation response through regional climate feedbacks. Journal of Climate, 29 (2). pp. 613-622. ISSN 0894-8755. doi:10.1175/JCLI-D-15-0424.1. https://resolver.caltech.edu/CaltechAUTHORS:20151203-115517508 <https://resolver.caltech.edu/CaltechAUTHORS:20151203-115517508> |
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other |
op_doi |
https://doi.org/10.1175/JCLI-D-15-0424.1 |
container_title |
Journal of Climate |
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29 |
container_issue |
2 |
container_start_page |
613 |
op_container_end_page |
622 |
_version_ |
1766194960994926592 |