The University of Southampton
University of Southampton Institutional Repository

Correction of marine air temperature observations for solar radiation effects

Record type: Article

The effect of incoming solar radiation on merchant ships' observations of air temperature was assessed as part of the Voluntary Observing Ships' Special Observing Project for the North Atlantic (VSOP-NA), The ships' reports were compared with interpolated output from a numerical weather model. Differences between the ship values and the model values for air temperature (?Ta) were found, in the mean, to be independent of instrument type, ship size, and, except for very badly exposed sensors, exposure. The differences were related to the relative wind speed over the ship (V) and the incoming shortwave radiation (R). The formula derived for the radiative heating error ?T was ?T = 2.7 × 10?3 R ? 3.2 × 10?5 RV, where ?t has units of degrees Celsius, R is in watts per square meter, and V is in knots.
After correcting the ?Ta values, an approximately constant bias remained with the ship reports on average 0.4°C lower than the model air temperatures. This offset probably represents a mean bias in the model estimates; however, a residual bias in the ship observations is also a possibility. There was also evidence that heat generated by the ship caused a temperature overestimate of about 0.4°C at zero relative wind, decreasing to a negligible level at a relative wind speed of 20 kt.
For the North Atlantic dataset used, the correction reduced daytime marine air temperature reports by 0.63°C on average. Applying the correction to the VSOP-NA air temperature data was found to significantly change estimates of sensible and latent heat fluxes.

Full text not available from this repository.

Citation

Kent, E.C., Tiddy, R.J. and Taylor, P.K. (1993) Correction of marine air temperature observations for solar radiation effects Journal of Atmospheric and Oceanic Technology, 10, (6), pp. 900-906. (doi:10.1175/1520-0426(1993)010<0900:COMATO>2.0.CO;2).

More information

Published date: December 1993
Keywords: solar radiation, air temperature, correction, ship

Identifiers

Local EPrints ID: 55839
URI: http://eprints.soton.ac.uk/id/eprint/55839
ISSN: 0739-0572
PURE UUID: 1d09b4f3-0010-4778-8980-26974d6d2b3a

Catalogue record

Date deposited: 08 Aug 2008
Last modified: 17 Jul 2017 14:31

Export record

Altmetrics

Contributors

Author: E.C. Kent
Author: R.J. Tiddy
Author: P.K. Taylor

University divisions


Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×