Investigation of North Atlantic Fog and Development of a Marine Fog Forecast System
Ocean fog and haze were studied to provide additional expertise for An Expert-system for Shipboard Obscuration Prediction (AESOP). Task I studied fog occurrence in the N. Atlantic and developed an AESOP rule base for these fogs, Task II evaluated forecast errors generated during a test of AESOP, and...
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ftdtic:ADA211780 2023-05-15T17:31:34+02:00 Investigation of North Atlantic Fog and Development of a Marine Fog Forecast System Rogers, C. W. CALSPAN CORP BUFFALO NY 1989-04 text/html http://www.dtic.mil/docs/citations/ADA211780 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA211780 en eng http://www.dtic.mil/docs/citations/ADA211780 Approved for public release; distribution is unlimited. DTIC AND NTIS Meteorology *MARINE ATMOSPHERES *FOG *OBSCURATION *HAZE BOUNDARY LAYER DISSIPATION RADIATION ABSORPTION HEATING ERRORS SHIPBOARD CONCENTRATION(COMPOSITION) SOLAR RADIATION MARINE METEOROLOGY NORTH ATLANTIC OCEAN ADVECTION SUMMER OPEN WATER TEMPERATURE INVERSION STRATUS CLOUDS SHALLOW DEPTH ANTICYCLONES LOW HUMIDITY FORECASTING LAYERS FOG DISPERSAL AEROSOLS PREDICTIONS AESOP EXPERT SYSTEM TAYLOR FOG MIDLATITUDES EXPERT SYSTEMS PE62435N WUDN656766 Text 1989 ftdtic 2016-02-23T04:54:06Z Ocean fog and haze were studied to provide additional expertise for An Expert-system for Shipboard Obscuration Prediction (AESOP). Task I studied fog occurrence in the N. Atlantic and developed an AESOP rule base for these fogs, Task II evaluated forecast errors generated during a test of AESOP, and modified and extended the rule base to correct for these errors. Fog is primarily a summertime phenomenon in the N. Atlantic. Taylor fog forms at midlatitudes (40-50N) in the stable, relatively shallow marine boundary layer which is located at the western end of the semi-permanent anticyclone. In the eastern N. Atlantic extratropical anticyclogenesis occasionally occurs, which can produce stratus lowering fog along its eastern side and Taylor fog in the southerly flow at its western end. At 50-60N in the track of the transient synoptic systems, much of the fog is advected in from the Taylor fog formation regions to the S and W. Fog dissipation is driven primarily by heating produced by absorption of solar radiation and mixing of warm air from above the inversion which caps the fog layer. These two dissipation processes are abetted by the mixing of the lower humidity of the warm air. Over the open ocean, the aerosol concentration is generally too low to provide even the minimum concentration required to produce a maximum haze visibility of 5 n mi. Text North Atlantic Defense Technical Information Center: DTIC Technical Reports database |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
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English |
topic |
Meteorology *MARINE ATMOSPHERES *FOG *OBSCURATION *HAZE BOUNDARY LAYER DISSIPATION RADIATION ABSORPTION HEATING ERRORS SHIPBOARD CONCENTRATION(COMPOSITION) SOLAR RADIATION MARINE METEOROLOGY NORTH ATLANTIC OCEAN ADVECTION SUMMER OPEN WATER TEMPERATURE INVERSION STRATUS CLOUDS SHALLOW DEPTH ANTICYCLONES LOW HUMIDITY FORECASTING LAYERS FOG DISPERSAL AEROSOLS PREDICTIONS AESOP EXPERT SYSTEM TAYLOR FOG MIDLATITUDES EXPERT SYSTEMS PE62435N WUDN656766 |
spellingShingle |
Meteorology *MARINE ATMOSPHERES *FOG *OBSCURATION *HAZE BOUNDARY LAYER DISSIPATION RADIATION ABSORPTION HEATING ERRORS SHIPBOARD CONCENTRATION(COMPOSITION) SOLAR RADIATION MARINE METEOROLOGY NORTH ATLANTIC OCEAN ADVECTION SUMMER OPEN WATER TEMPERATURE INVERSION STRATUS CLOUDS SHALLOW DEPTH ANTICYCLONES LOW HUMIDITY FORECASTING LAYERS FOG DISPERSAL AEROSOLS PREDICTIONS AESOP EXPERT SYSTEM TAYLOR FOG MIDLATITUDES EXPERT SYSTEMS PE62435N WUDN656766 Rogers, C. W. Investigation of North Atlantic Fog and Development of a Marine Fog Forecast System |
topic_facet |
Meteorology *MARINE ATMOSPHERES *FOG *OBSCURATION *HAZE BOUNDARY LAYER DISSIPATION RADIATION ABSORPTION HEATING ERRORS SHIPBOARD CONCENTRATION(COMPOSITION) SOLAR RADIATION MARINE METEOROLOGY NORTH ATLANTIC OCEAN ADVECTION SUMMER OPEN WATER TEMPERATURE INVERSION STRATUS CLOUDS SHALLOW DEPTH ANTICYCLONES LOW HUMIDITY FORECASTING LAYERS FOG DISPERSAL AEROSOLS PREDICTIONS AESOP EXPERT SYSTEM TAYLOR FOG MIDLATITUDES EXPERT SYSTEMS PE62435N WUDN656766 |
description |
Ocean fog and haze were studied to provide additional expertise for An Expert-system for Shipboard Obscuration Prediction (AESOP). Task I studied fog occurrence in the N. Atlantic and developed an AESOP rule base for these fogs, Task II evaluated forecast errors generated during a test of AESOP, and modified and extended the rule base to correct for these errors. Fog is primarily a summertime phenomenon in the N. Atlantic. Taylor fog forms at midlatitudes (40-50N) in the stable, relatively shallow marine boundary layer which is located at the western end of the semi-permanent anticyclone. In the eastern N. Atlantic extratropical anticyclogenesis occasionally occurs, which can produce stratus lowering fog along its eastern side and Taylor fog in the southerly flow at its western end. At 50-60N in the track of the transient synoptic systems, much of the fog is advected in from the Taylor fog formation regions to the S and W. Fog dissipation is driven primarily by heating produced by absorption of solar radiation and mixing of warm air from above the inversion which caps the fog layer. These two dissipation processes are abetted by the mixing of the lower humidity of the warm air. Over the open ocean, the aerosol concentration is generally too low to provide even the minimum concentration required to produce a maximum haze visibility of 5 n mi. |
author2 |
CALSPAN CORP BUFFALO NY |
format |
Text |
author |
Rogers, C. W. |
author_facet |
Rogers, C. W. |
author_sort |
Rogers, C. W. |
title |
Investigation of North Atlantic Fog and Development of a Marine Fog Forecast System |
title_short |
Investigation of North Atlantic Fog and Development of a Marine Fog Forecast System |
title_full |
Investigation of North Atlantic Fog and Development of a Marine Fog Forecast System |
title_fullStr |
Investigation of North Atlantic Fog and Development of a Marine Fog Forecast System |
title_full_unstemmed |
Investigation of North Atlantic Fog and Development of a Marine Fog Forecast System |
title_sort |
investigation of north atlantic fog and development of a marine fog forecast system |
publishDate |
1989 |
url |
http://www.dtic.mil/docs/citations/ADA211780 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA211780 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA211780 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766129219345055744 |