Alaskan Stream Circulation and Exchanges through the Aleutian Island Passes: 1979-2003 Model Results
The objective of this research is to examine the long-term variability in the flow of the Alaskan Stream, as well as the northward transport through three selected Aleutian Island passes. Taking into consideration that upper ocean water properties and in part circulation in the Bering Sea are derive...
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ftdtic:ADA445288 2023-05-15T13:14:40+02:00 Alaskan Stream Circulation and Exchanges through the Aleutian Island Passes: 1979-2003 Model Results Roman, Ricardo NAVAL POSTGRADUATE SCHOOL MONTEREY CA 2006-03 text/html http://www.dtic.mil/docs/citations/ADA445288 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA445288 en eng http://www.dtic.mil/docs/citations/ADA445288 Approved for public release; distribution is unlimited. This document is not available from DTIC in microfiche. DTIC Physical and Dynamic Oceanography *GEOSTROPHIC CURRENTS *ALEUTIAN ISLANDS VELOCITY MODELS TRAFFIC UNDERSEA WARFARE THESES NORTH PACIFIC OCEAN SEA ICE OCEANOGRAPHY BERING SEA JET STREAMS ARCTIC REGIONS ISLANDS GEOSTROPHIC WIND REGIONS REDUCTION VARIATIONS SEA WATER *ALASKA STREAM *ALEUTIAN PASSES Text 2006 ftdtic 2016-02-22T02:11:49Z The objective of this research is to examine the long-term variability in the flow of the Alaskan Stream, as well as the northward transport through three selected Aleutian Island passes. Taking into consideration that upper ocean water properties and in part circulation in the Bering Sea are derived from northward flow through the Aleutians, it is important to understand how different anomalies in the movement of the Alaskan Stream might alter this communication with the Bering Sea. In the past, observational data has frequently underestimated the strength of the Alaskan Stream, basing measurements of geostrophic velocity on levels of no motion at either 1000 m or 1500 m. Using a 25-year (1979-2003) ice-ocean model the results presented in this study indicate that the Alaskan Stream transport is not only significantly larger than previously reported, but that westward flow extends to depths >4000 m. Research has also been conducted on the magnitude and frequency of eddy-induced changes to the path and strength of the Alaskan Stream. These changes can significantly impact northward flow through the Aleutian passes. This region is also of particular interest to the U.S. military. As recent observational and model studies have predicted future reductions of sea-ice in the Arctic, foreign military traffic might increase through the North Pacific Ocean, specifically the Aleutian Island passes, as countries begin to explore and conduct exercises within the Arctic region. This would increase the importance of understanding of acoustic properties within the Aleutian Island region, which is of relevance to Undersea Warfare. The original document contains color images. Text Aleutian Island Arctic Bering Sea Sea ice Alaska Aleutian Islands Defense Technical Information Center: DTIC Technical Reports database Arctic Bering Sea Pacific |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Physical and Dynamic Oceanography *GEOSTROPHIC CURRENTS *ALEUTIAN ISLANDS VELOCITY MODELS TRAFFIC UNDERSEA WARFARE THESES NORTH PACIFIC OCEAN SEA ICE OCEANOGRAPHY BERING SEA JET STREAMS ARCTIC REGIONS ISLANDS GEOSTROPHIC WIND REGIONS REDUCTION VARIATIONS SEA WATER *ALASKA STREAM *ALEUTIAN PASSES |
spellingShingle |
Physical and Dynamic Oceanography *GEOSTROPHIC CURRENTS *ALEUTIAN ISLANDS VELOCITY MODELS TRAFFIC UNDERSEA WARFARE THESES NORTH PACIFIC OCEAN SEA ICE OCEANOGRAPHY BERING SEA JET STREAMS ARCTIC REGIONS ISLANDS GEOSTROPHIC WIND REGIONS REDUCTION VARIATIONS SEA WATER *ALASKA STREAM *ALEUTIAN PASSES Roman, Ricardo Alaskan Stream Circulation and Exchanges through the Aleutian Island Passes: 1979-2003 Model Results |
topic_facet |
Physical and Dynamic Oceanography *GEOSTROPHIC CURRENTS *ALEUTIAN ISLANDS VELOCITY MODELS TRAFFIC UNDERSEA WARFARE THESES NORTH PACIFIC OCEAN SEA ICE OCEANOGRAPHY BERING SEA JET STREAMS ARCTIC REGIONS ISLANDS GEOSTROPHIC WIND REGIONS REDUCTION VARIATIONS SEA WATER *ALASKA STREAM *ALEUTIAN PASSES |
description |
The objective of this research is to examine the long-term variability in the flow of the Alaskan Stream, as well as the northward transport through three selected Aleutian Island passes. Taking into consideration that upper ocean water properties and in part circulation in the Bering Sea are derived from northward flow through the Aleutians, it is important to understand how different anomalies in the movement of the Alaskan Stream might alter this communication with the Bering Sea. In the past, observational data has frequently underestimated the strength of the Alaskan Stream, basing measurements of geostrophic velocity on levels of no motion at either 1000 m or 1500 m. Using a 25-year (1979-2003) ice-ocean model the results presented in this study indicate that the Alaskan Stream transport is not only significantly larger than previously reported, but that westward flow extends to depths >4000 m. Research has also been conducted on the magnitude and frequency of eddy-induced changes to the path and strength of the Alaskan Stream. These changes can significantly impact northward flow through the Aleutian passes. This region is also of particular interest to the U.S. military. As recent observational and model studies have predicted future reductions of sea-ice in the Arctic, foreign military traffic might increase through the North Pacific Ocean, specifically the Aleutian Island passes, as countries begin to explore and conduct exercises within the Arctic region. This would increase the importance of understanding of acoustic properties within the Aleutian Island region, which is of relevance to Undersea Warfare. The original document contains color images. |
author2 |
NAVAL POSTGRADUATE SCHOOL MONTEREY CA |
format |
Text |
author |
Roman, Ricardo |
author_facet |
Roman, Ricardo |
author_sort |
Roman, Ricardo |
title |
Alaskan Stream Circulation and Exchanges through the Aleutian Island Passes: 1979-2003 Model Results |
title_short |
Alaskan Stream Circulation and Exchanges through the Aleutian Island Passes: 1979-2003 Model Results |
title_full |
Alaskan Stream Circulation and Exchanges through the Aleutian Island Passes: 1979-2003 Model Results |
title_fullStr |
Alaskan Stream Circulation and Exchanges through the Aleutian Island Passes: 1979-2003 Model Results |
title_full_unstemmed |
Alaskan Stream Circulation and Exchanges through the Aleutian Island Passes: 1979-2003 Model Results |
title_sort |
alaskan stream circulation and exchanges through the aleutian island passes: 1979-2003 model results |
publishDate |
2006 |
url |
http://www.dtic.mil/docs/citations/ADA445288 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA445288 |
geographic |
Arctic Bering Sea Pacific |
geographic_facet |
Arctic Bering Sea Pacific |
genre |
Aleutian Island Arctic Bering Sea Sea ice Alaska Aleutian Islands |
genre_facet |
Aleutian Island Arctic Bering Sea Sea ice Alaska Aleutian Islands |
op_source |
DTIC |
op_relation |
http://www.dtic.mil/docs/citations/ADA445288 |
op_rights |
Approved for public release; distribution is unlimited. This document is not available from DTIC in microfiche. |
_version_ |
1766264836462739456 |