nerc.ac.uk

On estimating the atmospheric longwave flux at the ocean surface from ship meteorological reports.

Josey, S.A.; Oakely, D.; Pascal, R.W. . 1997 On estimating the atmospheric longwave flux at the ocean surface from ship meteorological reports. Journal of Geophysical Research, 102 (C13). 27961-27972. 10.1029/97JC02420

Full text not available from this repository. (Request a copy)

Abstract/Summary

The accuracy to which the atmospheric component of the longwave flux at the ocean surface can be estimated by using simple empirical formulae, with information from standard ship meteorological reports as input, has been tested by comparison with radiometric measurements made on cruises in the midlatitude North Atlantic and the Southern Ocean. Over a wide range of atmospheric conditions the best agreement between the estimated and measured downwelling longwave flux is obtained by using the formula of Clark et al. [1974], which has a mean bias error with respect to our combined data set of −0.7 W/m2. Two other formulae were considered: the Bunker [1976] formula, which is found to overestimate the atmospheric longwave flux at values less than about 350 W/m2, resulting in an overall bias of 9.4 W/m2, and the Bignami et al. [1995] formula, which underestimates the flux over the entire range considered, giving a bias of −26.5W/m2. The difference in performance of the Clark and Bunker formulae is ascribed to the different parameterizations assumed for the effect of clouds and atmospheric humidity on the longwave flux. It is suggested that the Clark formula be used in future climatological studies at midlatitudes.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1029/97JC02420
ISSN: 0148-0227
Date made live: 14 Jun 2010 10:13 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/257015

Actions (login required)

View Item View Item

Document Downloads

Downloads for past 30 days

Downloads per month over past year

More statistics for this item...