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1.
The climatology of mean wind, diurnal and semidiurnal tide during the first year (1996–1997) of simultaneous wind observations at Wakkanai (45.4°N, 141.7°E) and Yamagawa (31.2°N, 130.6°E) is presented. The locations of the radars allow us to describe the latitudinal dependence of the tides. Tidal amplitude and phase profiles are compared with those of the global scale wave model (GSWM). While the observed amplitude profiles of the diurnal tide agree well with the GSWM values, the observed phase profiles often indicate longer vertical wavelengths than the GSWM phase profiles. In contrast to the GSWM simulation, the observations show a strong bimodal structure of the diurnal tide, with the phase advancing about 6 hours from summer to winter. 相似文献
2.
J. Lee Grenfell Markus Kunze Ulrike Langematz Peter Mieth Benedikt Steil 《Journal of Atmospheric and Solar》2010,72(9-10):705-712
We simulate twenty, perpetual Januaries each under solar minimum and maximum conditions using the Freie Universität Berlin Climate Middle Atmosphere Model with interactive chemistry (FUB CMAM CHEM), including the 27-day solar rotational cycle. Cross-correlation functions (r) of tropical ozone and ultraviolet (UV) suggest peak values of +0.5 to +0.6 (with % changes in ozone of 0.4–0.6%) in the middle atmosphere. Temperature in the middle atmosphere varies with UV by up to 0.5 K, which appears to be mainly dynamical in origin. We calculate a signal associated with the rotational cycle in the troposphere, although this requires further investigations. 相似文献