Annual westward propagating anomalies near 26°N and eddy generation south of the Canary Islands: remote sensing (altimeter/SeaWiFS) and in situ measurement
Seasonal changes in altimeter data are derived for the North Atlantic Ocean. Altimeter data are then used to examine annually propagating structure along 26°N. By averaging the altimeter data into monthly values or by Fourier analysis, a positive anomaly can be followed from 17°W to ∼50°W along ∼26°...
Published in: | Journal of the Marine Biological Association of the United Kingdom |
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Cambridge University Press (CUP)
2004
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Online Access: | http://dx.doi.org/10.1017/s0025315404010549h https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315404010549 |
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crcambridgeupr:10.1017/s0025315404010549h 2024-04-28T08:30:42+00:00 Annual westward propagating anomalies near 26°N and eddy generation south of the Canary Islands: remote sensing (altimeter/SeaWiFS) and in situ measurement Pingree, Robin Garcia-Soto, Carlos 2004 http://dx.doi.org/10.1017/s0025315404010549h https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315404010549 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Journal of the Marine Biological Association of the United Kingdom volume 84, issue 6, page 1105-1115 ISSN 0025-3154 1469-7769 Aquatic Science journal-article 2004 crcambridgeupr https://doi.org/10.1017/s0025315404010549h 2024-04-09T06:55:07Z Seasonal changes in altimeter data are derived for the North Atlantic Ocean. Altimeter data are then used to examine annually propagating structure along 26°N. By averaging the altimeter data into monthly values or by Fourier analysis, a positive anomaly can be followed from 17°W to ∼50°W along ∼26°N. The methods give a westward travel speed of 1° of longitude a month and a half-life of one year for the average decaying structure. At ∼50°W 26°N, the average structure is about 2·8 years old with an elevation signal of ∼1 cm, having travelled ∼3300 km westward. The mean positive anomaly results from the formation of anticyclonic eddies which are generally formed annually south of the Canary Islands by late summer and which then travel westward near 26°N. Individual eddy structure along 26°N is examined and related to in situ measurements and anomalies in the annual seasonal concentration cycle of SeaWiFS chlorophyll- a . Article in Journal/Newspaper North Atlantic Cambridge University Press Journal of the Marine Biological Association of the United Kingdom 84 6 1105 1115 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Aquatic Science |
spellingShingle |
Aquatic Science Pingree, Robin Garcia-Soto, Carlos Annual westward propagating anomalies near 26°N and eddy generation south of the Canary Islands: remote sensing (altimeter/SeaWiFS) and in situ measurement |
topic_facet |
Aquatic Science |
description |
Seasonal changes in altimeter data are derived for the North Atlantic Ocean. Altimeter data are then used to examine annually propagating structure along 26°N. By averaging the altimeter data into monthly values or by Fourier analysis, a positive anomaly can be followed from 17°W to ∼50°W along ∼26°N. The methods give a westward travel speed of 1° of longitude a month and a half-life of one year for the average decaying structure. At ∼50°W 26°N, the average structure is about 2·8 years old with an elevation signal of ∼1 cm, having travelled ∼3300 km westward. The mean positive anomaly results from the formation of anticyclonic eddies which are generally formed annually south of the Canary Islands by late summer and which then travel westward near 26°N. Individual eddy structure along 26°N is examined and related to in situ measurements and anomalies in the annual seasonal concentration cycle of SeaWiFS chlorophyll- a . |
format |
Article in Journal/Newspaper |
author |
Pingree, Robin Garcia-Soto, Carlos |
author_facet |
Pingree, Robin Garcia-Soto, Carlos |
author_sort |
Pingree, Robin |
title |
Annual westward propagating anomalies near 26°N and eddy generation south of the Canary Islands: remote sensing (altimeter/SeaWiFS) and in situ measurement |
title_short |
Annual westward propagating anomalies near 26°N and eddy generation south of the Canary Islands: remote sensing (altimeter/SeaWiFS) and in situ measurement |
title_full |
Annual westward propagating anomalies near 26°N and eddy generation south of the Canary Islands: remote sensing (altimeter/SeaWiFS) and in situ measurement |
title_fullStr |
Annual westward propagating anomalies near 26°N and eddy generation south of the Canary Islands: remote sensing (altimeter/SeaWiFS) and in situ measurement |
title_full_unstemmed |
Annual westward propagating anomalies near 26°N and eddy generation south of the Canary Islands: remote sensing (altimeter/SeaWiFS) and in situ measurement |
title_sort |
annual westward propagating anomalies near 26°n and eddy generation south of the canary islands: remote sensing (altimeter/seawifs) and in situ measurement |
publisher |
Cambridge University Press (CUP) |
publishDate |
2004 |
url |
http://dx.doi.org/10.1017/s0025315404010549h https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0025315404010549 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Journal of the Marine Biological Association of the United Kingdom volume 84, issue 6, page 1105-1115 ISSN 0025-3154 1469-7769 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0025315404010549h |
container_title |
Journal of the Marine Biological Association of the United Kingdom |
container_volume |
84 |
container_issue |
6 |
container_start_page |
1105 |
op_container_end_page |
1115 |
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1797588467703611392 |