Use this URL to cite or link to this record in EThOS: http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.649130
Title: Capability of MLS instruments in the observations of atmospheric gravity waves
Author: Dasananda, Songkot
Awarding Body: University of Edinburgh
Current Institution: University of Edinburgh
Date of Award: 2001
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Abstract:
We found that the temperature response functions of both UARS MLS and EOS MLS instrument for waves with typical vertical wavelength of 1-20 km are sharply peaked at certain horizontal wavelengths but their amplitudes are always less than ~60% in case of UARS MLS and 80% for EOS MLS. The responses at vertical wavelength of 10-20 km, in particular, are considerably high to waves with horizontal wavelength of scales ~200-500 km which are propagating away from the satellite position with respect to the line-of-sight direction. These are waves that should be most detectable with both of the MLS instruments in the real observations in terms of the amplitude response. The variance response functions in the 32-measurement limb-tracking mode of UARS MLS and 150-measurment limb-tracking mode of EOS MLS have also peaked at some certain horizontal wavelengths for waves of vertical wavelength 1-20 km but their amplitudes never exceeds ~20% for UARS MLS and 30% for EOS MLS. Like the temperature response, the variance responses at vertical wavelengths of 10-20 km are maximum to waves with horizontal wavelength of scales ~200-500 km which are propagating away from the satellite position with respect to the LOS. In the contrary, gravity waves with vertical wavelength of few kilometers are unlikely to be much visible to the MLS instruments due to the very low response regardless of their horizontal wavelength scales or directions of propagation.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.649130  DOI: Not available
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