ANALYSIS AND PREDICTION OF VISIBILITY AT SEA.

This paper is concerned with the problem of visibility at sea and fog over the sea. Restrictions to visibility in general are discussed and suspended moisture is related to low visibilities at sea. Fleet Numerical Weather Facility at Monterey produces a field of the difference between the vapor pres...

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Bibliographic Details
Main Author: Schramm, William George
Other Authors: NAVAL POSTGRADUATE SCHOOL MONTEREY CA
Format: Text
Language:English
Published: 1966
Subjects:
Meteorology
(*VISIBILITY
OCEANS)
(*WEATHER FORECASTING
FOG)
ATMOSPHERIC TEMPERATURE
WIND
MOISTURE
ATLANTIC OCEAN
AIR
NUMERICAL ANALYSIS
GRAPHICS
COMPUTER PROGRAMMING
VAPOR PRESSURE
STRATUS CLOUDS
DEW POINT
HUMIDITY
PRESSURE
PROBABILITY
MATHEMATICAL PREDICTION
ATMOSPHERIC PRECIPITATION
MAPS
BACKGROUND
AIR WATER INTERACTIONS
NORTH ATLANTIC
North Atlantic
Online Access:http://www.dtic.mil/docs/citations/AD0488494
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0488494
Description
Summary:This paper is concerned with the problem of visibility at sea and fog over the sea. Restrictions to visibility in general are discussed and suspended moisture is related to low visibilities at sea. Fleet Numerical Weather Facility at Monterey produces a field of the difference between the vapor pressures of the sea and air. This field is used as a humidity index to determine the moisture in the air and is related to visibility. A total of 1100 data points from the North Atlantic were analyzed and an attempt was made to produce a linear regression equation. The regression equation proved to be most inaccurate in the area of low visibilities. A scattergram of visibility as a function of air temperature and the vapor pressure difference revealed a significant relationship. Using this relationship it is possible to forecast visibility and fog probability.

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