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Comparisons between instantaneous wind measurements made at Saskatoon (52N, 107W) using the colocated medium frequency radars and Fabry-Perot interferometer instruments: Climatologies (1988-1992) and case studies

易帆Alan Manson Fan Yi Greg Hall and Chris Meek

JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 101, NO.D23, PAGES 29, 553-29, 563, DECEMBER 27, 1996,-0001,():

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摘要/描述

Winds and waves measured by the Medium Frequency Radars (MFR) at Saskatoon (52N, 107W), Robsart (49N, lg9W), and Sylvan Lake (52N, 114w), and the Fabry-Perot Interferometer (FPI) at Saskatoon are compared. Particular care has been taken to exclude FPI airglow (558 nm, green line) contamination by aurora or scatter from clouds; radar data were setected from high slgnal-to-noise conditions. Comparisons between the MFR/FPI in seasonal wind climatologies (at a radar height of 98km) and wind speed ratios and direction-difference histograms for the Saskatoon systems show excellent agreement. Zonal and meridional wind comparisons (scatter plots) also show no significant differences in mean winds between the FPI and MFR. Differences between instantaneous measurements, as seen on 91 individual days, are categorized into four types of events, depending upon FPI/MFR similarities and differences and the dominance of the solar tide A gravity wave model is then used to demonstrate the effects of waves, with scales from hundreds to several thousand of kilometers, upon such optical and radar systems, each of which has a different inherent spatial averaging. The model is largely successful in explaining the differences between the instantaneous MFR and FPI measurements. The relevance of such comparisons to satellite/ground-based collaborations is briefly discussed.

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版权说明:以下全部内容由易帆上传于   2005年10月12日 22时12分53秒,版权归本人所有。

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