A statistical determination of the random observational errors present in Voluntary Observing Ships meteorological reports

Kent, E.C. ORCID: https://orcid.org/0000-0002-6209-4247; Challenor, P.G.; Taylor, P.K.. 1999 A statistical determination of the random observational errors present in Voluntary Observing Ships meteorological reports. Journal of Atmospheric and Oceanic Technology, 16 (7). 905-914. 10.1175/1520-0426(1999)016<0905:ASDOTR>2.0.CO;2

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Abstract/Summary

The random observational errors for meteorological variables within the Comprehensive Ocean–Atmosphere Dataset (COADS) have been determined using the semivariogram statistical technique. The error variance has been calculated using four months of data, spanning summer and winter months and the start and end of the dataset. The random errors found range from 1.3 to 2.8 m s−1 for 10-m-corrected wind speed, 1.2 to 7.1 mb for surface pressure, 0.8° to 3.3°C for 10-m air temperature, 0.4° to 2.8°C for sea surface temperature, and 0.6 to 1.8 g kg−1 for 10-m specific humidity. The air temperature and specific humidity random observational errors contain a dependence on their mean values, but correlations between errors and mean values are low for the other variables analyzed. The accuracy of the error estimates increases with the number of observational data pairs used in the analysis. Wind speed random observational errors were reduced by height correction and by the use of the Lindau Beaufort Scale.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1175/1520-0426(1999)016<0905:ASDOTR>2.0.CO;2
ISSN:	0739-0572
Date made live:	16 Jan 2008 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/150053

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.1175/1520-0426(1999)016<0905:ASDOTR>2.0.CO;2

ISSN:

0739-0572

Date made live:

16 Jan 2008 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/150053