Spatial distribution of air-sea heat fluxes over the sub-polar North Atlantic Ocean
Author Posting. © American Geophysical Union, 2012. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 39 (2012): L18806, doi:10.1029/2012GL053097. On a variety of spat...
Published in: | Geophysical Research Letters |
---|---|
Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
American Geophysical Union
2012
|
Subjects: | |
Online Access: | https://hdl.handle.net/1912/5523 |
id |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/5523 |
---|---|
record_format |
openpolar |
spelling |
ftwhoas:oai:darchive.mblwhoilibrary.org:1912/5523 2023-05-15T16:30:31+02:00 Spatial distribution of air-sea heat fluxes over the sub-polar North Atlantic Ocean Moore, G. W. K. Renfrew, Ian A. Pickart, Robert S. 2012-09-27 application/msword text/plain application/pdf https://hdl.handle.net/1912/5523 en_US eng American Geophysical Union https://doi.org/10.1029/2012GL053097 Geophysical Research Letters 39 (2012): L18806 https://hdl.handle.net/1912/5523 doi:10.1029/2012GL053097 Geophysical Research Letters 39 (2012): L18806 doi:10.1029/2012GL053097 Air-sea interaction Climate variability Water mass transformation Article 2012 ftwhoas https://doi.org/10.1029/2012GL053097 2022-05-28T22:58:43Z Author Posting. © American Geophysical Union, 2012. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 39 (2012): L18806, doi:10.1029/2012GL053097. On a variety of spatial and temporal scales, the energy transferred by air-sea heat and moisture fluxes plays an important role in both atmospheric and oceanic circulations. This is particularly true in the sub-polar North Atlantic Ocean, where these fluxes drive water-mass transformations that are an integral component of the Atlantic Meridional Overturning Circulation (AMOC). Here we use the ECMWF Interim Reanalysis to provide a high-resolution view of the spatial structure of the air-sea turbulent heat fluxes over the sub-polar North Atlantic Ocean. As has been previously recognized, the Labrador and Greenland Seas are areas where these fluxes are large during the winter months. Our particular focus is on the Iceland Sea region where, despite the fact that water-mass transformation occurs, the winter-time air-sea heat fluxes are smaller than anywhere else in the sub-polar domain. We attribute this minimum to a saddle point in the sea-level pressure field, that results in a reduction in mean surface wind speed, as well as colder sea surface temperatures associated with the regional ocean circulation. The magnitude of the heat fluxes in this region are modulated by the relative strength of the Icelandic and Lofoten Lows, and this leads to periods of ocean cooling and even ocean warming when, intriguingly, the sensible and latent heat fluxes are of opposite sign. This suggests that the air-sea forcing in this area has large-scale impacts for climate, and that even modest shifts in the atmospheric circulation could potentially impact the AMOC. GWKM was supported by the Natural Science and Engineering Research Council of Canada. IAR was funded in part by NCAS (the National Centre for Atmospheric Sciences) and by NERC grant ... Article in Journal/Newspaper Greenland Iceland Lofoten North Atlantic Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Canada Greenland Lofoten Saddle Point ENVELOPE(73.483,73.483,-53.017,-53.017) Geophysical Research Letters 39 18 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Air-sea interaction Climate variability Water mass transformation |
spellingShingle |
Air-sea interaction Climate variability Water mass transformation Moore, G. W. K. Renfrew, Ian A. Pickart, Robert S. Spatial distribution of air-sea heat fluxes over the sub-polar North Atlantic Ocean |
topic_facet |
Air-sea interaction Climate variability Water mass transformation |
description |
Author Posting. © American Geophysical Union, 2012. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 39 (2012): L18806, doi:10.1029/2012GL053097. On a variety of spatial and temporal scales, the energy transferred by air-sea heat and moisture fluxes plays an important role in both atmospheric and oceanic circulations. This is particularly true in the sub-polar North Atlantic Ocean, where these fluxes drive water-mass transformations that are an integral component of the Atlantic Meridional Overturning Circulation (AMOC). Here we use the ECMWF Interim Reanalysis to provide a high-resolution view of the spatial structure of the air-sea turbulent heat fluxes over the sub-polar North Atlantic Ocean. As has been previously recognized, the Labrador and Greenland Seas are areas where these fluxes are large during the winter months. Our particular focus is on the Iceland Sea region where, despite the fact that water-mass transformation occurs, the winter-time air-sea heat fluxes are smaller than anywhere else in the sub-polar domain. We attribute this minimum to a saddle point in the sea-level pressure field, that results in a reduction in mean surface wind speed, as well as colder sea surface temperatures associated with the regional ocean circulation. The magnitude of the heat fluxes in this region are modulated by the relative strength of the Icelandic and Lofoten Lows, and this leads to periods of ocean cooling and even ocean warming when, intriguingly, the sensible and latent heat fluxes are of opposite sign. This suggests that the air-sea forcing in this area has large-scale impacts for climate, and that even modest shifts in the atmospheric circulation could potentially impact the AMOC. GWKM was supported by the Natural Science and Engineering Research Council of Canada. IAR was funded in part by NCAS (the National Centre for Atmospheric Sciences) and by NERC grant ... |
format |
Article in Journal/Newspaper |
author |
Moore, G. W. K. Renfrew, Ian A. Pickart, Robert S. |
author_facet |
Moore, G. W. K. Renfrew, Ian A. Pickart, Robert S. |
author_sort |
Moore, G. W. K. |
title |
Spatial distribution of air-sea heat fluxes over the sub-polar North Atlantic Ocean |
title_short |
Spatial distribution of air-sea heat fluxes over the sub-polar North Atlantic Ocean |
title_full |
Spatial distribution of air-sea heat fluxes over the sub-polar North Atlantic Ocean |
title_fullStr |
Spatial distribution of air-sea heat fluxes over the sub-polar North Atlantic Ocean |
title_full_unstemmed |
Spatial distribution of air-sea heat fluxes over the sub-polar North Atlantic Ocean |
title_sort |
spatial distribution of air-sea heat fluxes over the sub-polar north atlantic ocean |
publisher |
American Geophysical Union |
publishDate |
2012 |
url |
https://hdl.handle.net/1912/5523 |
long_lat |
ENVELOPE(73.483,73.483,-53.017,-53.017) |
geographic |
Canada Greenland Lofoten Saddle Point |
geographic_facet |
Canada Greenland Lofoten Saddle Point |
genre |
Greenland Iceland Lofoten North Atlantic |
genre_facet |
Greenland Iceland Lofoten North Atlantic |
op_source |
Geophysical Research Letters 39 (2012): L18806 doi:10.1029/2012GL053097 |
op_relation |
https://doi.org/10.1029/2012GL053097 Geophysical Research Letters 39 (2012): L18806 https://hdl.handle.net/1912/5523 doi:10.1029/2012GL053097 |
op_doi |
https://doi.org/10.1029/2012GL053097 |
container_title |
Geophysical Research Letters |
container_volume |
39 |
container_issue |
18 |
_version_ |
1766020239418458112 |