Comparisons of global analyses and station observations of the S2 barometric tide

Details Comparisons of global analyses and station observations of the S2 barometric tide Comparisons of global analyses and station observations of the S2 barometric tide

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001jastp..63.1085r&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 63, Issue 10, p. 1085-1097.

Physics

7

Scientific paper

The semidiurnal atmospheric pressure oscillation-the S2(p) tide-is deduced from two global meteorological reanalysis products: the NCEP//NCAR and GEOS-1 products. S2 is deduced from the NCEP surface pressure product by using a special temporal interpolation devised by Van den Dool et al. The tide is deduced from the GEOS-1 product by directly analyzing six years of 3-h surface pressure fields. Two extensive collections of ``ground-truth'' stations are used to test the results; these are stations where the tides have been previously estimated from long time series of pressure measurements. Neither reanalysis product gives a completely adequate description of the semidiurnal tide. A new spherical harmonic expansion of S2 is developed directly from one of the station datasets.

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