An Empirical Model of the Earth's Horizontal Wind Fields: HWM07

Details An Empirical Model of the Earth's Horizontal Wind Fields: HWM07 An Empirical Model of the Earth's Horizontal Wind Fields: HWM07

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsa21b1540d&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SA21B-1540

Physics

3315 Data Assimilation, 3332 Mesospheric Dynamics, 3369 Thermospheric Dynamics (0358), 3389 Tides And Planetary Waves

Scientific paper

The new Horizontal Wind Model (HWM07) provides a statistical representation of the horizontal wind fields of the Earth's atmosphere from the ground to the exosphere (0 to 500 km). It represents over fifty years of satellite, rocket, and ground-based wind measurements via a compact Fortran-90 subroutine. The computer model is a function of geographic location, altitude, day of the year, solar local time, and geomagnetic activity. It includes representations of the zonal mean circulation, stationary planetary waves, migrating tides, and the seasonal modulation thereof. The objective of the work presented is to address known HWM93 discrepancies by improving the mathematical formulation and assimilating new data sets. In this paper we present an overview of the new observational database, mathematical formulation, model parameter estimation procedure, and overall results with comparisons to data.

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