Influence of large scale oscillations on upwelling-favorable coastal wind off central Chile
This is the publisher's version, also available electronically from http://onlinelibrary.wiley.com/doi/10.1029/2012JD018016/abstract;jsessionid=258F6DB5E58E8470DF18F233E18F918C.f01t02. Along the central coast of Chile is typically equatorward, upwelling-favorable wind associated with the southe...
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Online Access: | http://hdl.handle.net/1808/15909 https://doi.org/10.1029/2012JD018016 |
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ftunivkansas:oai:kuscholarworks.ku.edu:1808/15909 2023-05-15T13:32:09+02:00 Influence of large scale oscillations on upwelling-favorable coastal wind off central Chile Rahn, David A. 2014-11-26T16:01:03Z http://hdl.handle.net/1808/15909 https://doi.org/10.1029/2012JD018016 unknown American Geophysical Union Rahn, David A. (2012). "Influence of large scale oscillations on upwelling-favorable coastal wind off central Chile." J. Geophys. Res, 117(D19):D19114. http://www.dx.doi.org/10.1029/2012JD018016. 0148-0227 http://hdl.handle.net/1808/15909 doi:10.1029/2012JD018016 openAccess Aao Chile Enso MJO Coastal upwelling Article 2014 ftunivkansas https://doi.org/10.1029/2012JD018016 2022-08-26T13:15:41Z This is the publisher's version, also available electronically from http://onlinelibrary.wiley.com/doi/10.1029/2012JD018016/abstract;jsessionid=258F6DB5E58E8470DF18F233E18F918C.f01t02. Along the central coast of Chile is typically equatorward, upwelling-favorable wind associated with the southeast Pacific anticyclone. A coastal low-level jet often develops, and its wind speed is mostly controlled by the meridional pressure gradient. While the low-level jet is a mesoscale feature forced by an interaction between synoptic conditions and coastal topography, regional sea level pressure anomalies are associated with changes of the Antarctic, Madden Julian, and El Niño–Southern Oscillation. The connection between the alongshore wind and changes to the large-scale circulation is examined and quantified using 31 years of the Climate Forecast System Reanalysis, which resolves coastal features better than previous, coarser analyses. Composites based on each index reveal the modulation of the sea level pressure and significant alongshore wind anomalies of ±0.5–1.5 m s−1 that correlate well to meridional surface pressure gradient changes and are centered near 35°S. Constructive and destructive interference exists between the three indices that either enhance or cancel the alongshore wind anomaly. During favorable upwelling conditions the distribution of meridional wind is generally clustered around positive anomalies with a tail toward negative values, representing a stronger and persistent anticyclone. During unfavorable upwelling conditions the anomalies are generally more normally distributed, representing a weaker anticyclone and the passage of more cyclones. Article in Journal/Newspaper Antarc* Antarctic The University of Kansas: KU ScholarWorks Antarctic Pacific The Antarctic Journal of Geophysical Research: Atmospheres 117 D19 n/a n/a |
institution |
Open Polar |
collection |
The University of Kansas: KU ScholarWorks |
op_collection_id |
ftunivkansas |
language |
unknown |
topic |
Aao Chile Enso MJO Coastal upwelling |
spellingShingle |
Aao Chile Enso MJO Coastal upwelling Rahn, David A. Influence of large scale oscillations on upwelling-favorable coastal wind off central Chile |
topic_facet |
Aao Chile Enso MJO Coastal upwelling |
description |
This is the publisher's version, also available electronically from http://onlinelibrary.wiley.com/doi/10.1029/2012JD018016/abstract;jsessionid=258F6DB5E58E8470DF18F233E18F918C.f01t02. Along the central coast of Chile is typically equatorward, upwelling-favorable wind associated with the southeast Pacific anticyclone. A coastal low-level jet often develops, and its wind speed is mostly controlled by the meridional pressure gradient. While the low-level jet is a mesoscale feature forced by an interaction between synoptic conditions and coastal topography, regional sea level pressure anomalies are associated with changes of the Antarctic, Madden Julian, and El Niño–Southern Oscillation. The connection between the alongshore wind and changes to the large-scale circulation is examined and quantified using 31 years of the Climate Forecast System Reanalysis, which resolves coastal features better than previous, coarser analyses. Composites based on each index reveal the modulation of the sea level pressure and significant alongshore wind anomalies of ±0.5–1.5 m s−1 that correlate well to meridional surface pressure gradient changes and are centered near 35°S. Constructive and destructive interference exists between the three indices that either enhance or cancel the alongshore wind anomaly. During favorable upwelling conditions the distribution of meridional wind is generally clustered around positive anomalies with a tail toward negative values, representing a stronger and persistent anticyclone. During unfavorable upwelling conditions the anomalies are generally more normally distributed, representing a weaker anticyclone and the passage of more cyclones. |
format |
Article in Journal/Newspaper |
author |
Rahn, David A. |
author_facet |
Rahn, David A. |
author_sort |
Rahn, David A. |
title |
Influence of large scale oscillations on upwelling-favorable coastal wind off central Chile |
title_short |
Influence of large scale oscillations on upwelling-favorable coastal wind off central Chile |
title_full |
Influence of large scale oscillations on upwelling-favorable coastal wind off central Chile |
title_fullStr |
Influence of large scale oscillations on upwelling-favorable coastal wind off central Chile |
title_full_unstemmed |
Influence of large scale oscillations on upwelling-favorable coastal wind off central Chile |
title_sort |
influence of large scale oscillations on upwelling-favorable coastal wind off central chile |
publisher |
American Geophysical Union |
publishDate |
2014 |
url |
http://hdl.handle.net/1808/15909 https://doi.org/10.1029/2012JD018016 |
geographic |
Antarctic Pacific The Antarctic |
geographic_facet |
Antarctic Pacific The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
Rahn, David A. (2012). "Influence of large scale oscillations on upwelling-favorable coastal wind off central Chile." J. Geophys. Res, 117(D19):D19114. http://www.dx.doi.org/10.1029/2012JD018016. 0148-0227 http://hdl.handle.net/1808/15909 doi:10.1029/2012JD018016 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1029/2012JD018016 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
117 |
container_issue |
D19 |
container_start_page |
n/a |
op_container_end_page |
n/a |
_version_ |
1766024574647926784 |