Validation and time series analysis of global stratospheric data sets

Jones, Ashley,1977Chalmers tekniska högskola,Chalmers University of Technology (author)

The depletion of ozone from the stratosphere and the impact of global warming have been identified as phenomena caused as a result of anthropogenic activity. Scientists are thus trying to find quicker and more reliable ways to analyse these environmental problems. Remote sensing of the atmosphere using satellites is perhaps the most cost effective method. One beneficial application is the acquisition of vertical profiles of atmospheric species on a global scale with good spatial and temporal resolutions. An example of an instrument that can achieve this is the Sub-Millimetre Radiometer (SMR) aboard the Odin satellite that launched in 2001, which retrieves vertical limb profiles of numerous trace gases, including stratospheric ozone. This thesis presents a validation summary for primarily the Odin/SMR ozone data products, v1.2, v2.0 and v2.1 (for the 501.8 GHz band in the microwave region). Comparisons are made to v4.61 data obtained from the Interferometer for Passive Atmospheric Soundings (MIPAS) instrument, on board the ENVISAT satellite. Further analysis compares Odin/SMR mixing ratios to balloon sonde data. It is suggested from the results found here that Odin/SMR v2.1 ozone data should be used for scientific purposes. Odin/ SMR is also compared to its sister instrument, the Optical Spectrograph Infra-Red Imaging System (Odin/OSIRIS). Results show an excellent agreement between coincident profiles (typically

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NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Meteorology and ...

NATURAL SCIENCES: NATURAL SCIENCES; and Earth and Relate ...; and Other Earth and ...

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