Evaporation duct occurrences in the northeast Atlantic during late summer
Analyses and interpretation of surface layer and synoptic-scale data obtained in the Northwest Atlantic were performed to obtain descriptions of the evaporation duct and associated atmospheric and oceanic synoptic features. The surface layer data were quite unique because they were obtained from hig...
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ftnavalpschool:oai:calhoun.nps.edu:10945/17583 2024-06-09T07:48:29+00:00 Evaporation duct occurrences in the northeast Atlantic during late summer Callahan, Thomas Edwin Davidson, Kenneth L. Naval Postgraduate School (U.S.) Meteorology Schacher, Gordon E 1980-09 application/pdf https://hdl.handle.net/10945/17583 en_US eng https://hdl.handle.net/10945/17583 This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States. Evaporation duct Air-sea interaction Joint Air-Sea Interaction Project (JASIN) Meteorology Thesis 1980 ftnavalpschool 2024-05-15T00:40:54Z Analyses and interpretation of surface layer and synoptic-scale data obtained in the Northwest Atlantic were performed to obtain descriptions of the evaporation duct and associated atmospheric and oceanic synoptic features. The surface layer data were quite unique because they were obtained from high quality measurements from ships spatially separated in a fixed array. Magnitudes and horizontal homogeneity of duct heights were compared to air-mass trajectories and weather patterns. The mean duct height was 4-Sm and higher values (8-13m) occurred with North and Northwest trajectories. During times when the heights were 5-13m, horizontal homogeneity occurred 35% of the time with a maximum duration of 12 hours. This was established on the basis of a two hundred kilometer separation between locations of duct heights estimates. Significant features of the duct height and its temporal and spatial variations were related to synoptic scale descriptions. Satellite imagery used in conjunction with point observations appears to provide the most useful information in describing the intensity and areal distribution of the evaporation duct. Approved for public release; distribution is unlimited. Lieutenant Commander, United States Navy http://archive.org/details/evaporationducto1094517583 Thesis Northeast Atlantic Northwest Atlantic Naval Postgraduate School: Calhoun |
institution |
Open Polar |
collection |
Naval Postgraduate School: Calhoun |
op_collection_id |
ftnavalpschool |
language |
English |
topic |
Evaporation duct Air-sea interaction Joint Air-Sea Interaction Project (JASIN) Meteorology |
spellingShingle |
Evaporation duct Air-sea interaction Joint Air-Sea Interaction Project (JASIN) Meteorology Callahan, Thomas Edwin Evaporation duct occurrences in the northeast Atlantic during late summer |
topic_facet |
Evaporation duct Air-sea interaction Joint Air-Sea Interaction Project (JASIN) Meteorology |
description |
Analyses and interpretation of surface layer and synoptic-scale data obtained in the Northwest Atlantic were performed to obtain descriptions of the evaporation duct and associated atmospheric and oceanic synoptic features. The surface layer data were quite unique because they were obtained from high quality measurements from ships spatially separated in a fixed array. Magnitudes and horizontal homogeneity of duct heights were compared to air-mass trajectories and weather patterns. The mean duct height was 4-Sm and higher values (8-13m) occurred with North and Northwest trajectories. During times when the heights were 5-13m, horizontal homogeneity occurred 35% of the time with a maximum duration of 12 hours. This was established on the basis of a two hundred kilometer separation between locations of duct heights estimates. Significant features of the duct height and its temporal and spatial variations were related to synoptic scale descriptions. Satellite imagery used in conjunction with point observations appears to provide the most useful information in describing the intensity and areal distribution of the evaporation duct. Approved for public release; distribution is unlimited. Lieutenant Commander, United States Navy http://archive.org/details/evaporationducto1094517583 |
author2 |
Davidson, Kenneth L. Naval Postgraduate School (U.S.) Meteorology Schacher, Gordon E |
format |
Thesis |
author |
Callahan, Thomas Edwin |
author_facet |
Callahan, Thomas Edwin |
author_sort |
Callahan, Thomas Edwin |
title |
Evaporation duct occurrences in the northeast Atlantic during late summer |
title_short |
Evaporation duct occurrences in the northeast Atlantic during late summer |
title_full |
Evaporation duct occurrences in the northeast Atlantic during late summer |
title_fullStr |
Evaporation duct occurrences in the northeast Atlantic during late summer |
title_full_unstemmed |
Evaporation duct occurrences in the northeast Atlantic during late summer |
title_sort |
evaporation duct occurrences in the northeast atlantic during late summer |
publishDate |
1980 |
url |
https://hdl.handle.net/10945/17583 |
genre |
Northeast Atlantic Northwest Atlantic |
genre_facet |
Northeast Atlantic Northwest Atlantic |
op_relation |
https://hdl.handle.net/10945/17583 |
op_rights |
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States. |
_version_ |
1801380243247726592 |