DWM07: A global empirical model of upper thermospheric storm-induced disturbance winds

Details DWM07: A global empirical model of upper thermospheric storm-induced disturbance winds DWM07: A global empirical model of upper thermospheric storm-induced disturbance winds

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agusmsa13b..01e&link_type=abstract

American Geophysical Union, Spring Meeting 2009, abstract #SA13B-01

Mathematics

Logic

2427 Ionosphere/Atmosphere Interactions (0335), 3309 Climatology (1616, 1620, 3305, 4215, 8408), 3369 Thermospheric Dynamics (0358)

Scientific paper

We present a global empirical disturbance wind model (DWM07) that represents average geospace-storm- induced perturbations of upper thermospheric (200-600 km altitude) neutral winds. DWM07 depends on three parameters: magnetic latitude, magnetic local time, and the 3-hour Kp geomagnetic activity index. The latitude and local time dependences are represented by vector spherical harmonic functions (up to degree 10 in latitude and order 3 in local time), and the Kp dependence is represented by quadratic B splines. DWM07 is the storm time thermospheric component of the provisional Horizontal Wind Model (HWM07) and is based on data from the Wind Imaging Interferometer (WINDII) on board the Upper Atmosphere Research Satellite (UARS), the Wind and Temperature Spectrometer (WATS) on board Dynamics Explorer 2 (DE 2), and seven ground-based Fabry-Perot interferometers (FPIs). The perturbation winds derived from the three data sets are in good mutual agreement under most conditions, and the model captures most of the climatological variations evident in the data.

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