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Reconciling tropospheric temperature trends from the microwave sounding unit

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dc.contributor.advisor Fu, Qiang en_US Po-Chedley, Stephen en_US 2012-09-13T17:40:25Z 2013-09-14T11:05:27Z 2012-09-13 2012 en_US
dc.identifier.other PoChedley_washington_0250O_10392.pdf en_US
dc.description Thesis (Master's)--University of Washington, 2012 en_US
dc.description.abstract The University of Alabama at Huntsville (UAH), Remote Sensing Systems (RSS), and the National Oceanic and Atmospheric Administration (NOAA) have constructed long-term temperature records for deep atmospheric layers using satellite microwave sounding unit (MSU) and advanced microwave sounding unit (AMSU) observations. However, these groups disagree on the magnitude of global temperature trends since 1979, including the trend for the mid-tropospheric layer (TMT). This study evaluates the selection of the MSU TMT warm target factor for the NOAA-9 satellite using five homogenized radiosonde products as references. The analysis reveals that the UAH TMT product has a positive bias of 0.051 ± 0.031 in the warm target factor that artificially reduces the global TMT trend by 0.042 K decade<super>−1</super> for 1979 − 2009. Accounting for this bias, we estimate that the global UAH TMT trend should increase from 0.038 K decade<super>−1</super> to 0.080 K decade<super>−1</super>, effectively eliminating the trend difference between UAH and RSS and decreasing the trend difference between UAH and NOAA by 47%. This warm target factor bias directly affects the UAH lower tropospheric (TLT) product and tropospheric temperature trends derived from a combination of TMT and lower stratospheric (TLS) channels. en_US
dc.format.mimetype application/pdf en_US
dc.language.iso en_US en_US
dc.subject climate records; microwave observations; microwave sounding unit; satellite calibration; satellite observations; tropospheric temperature change en_US
dc.subject.other Remote sensing en_US
dc.subject.other Climate change en_US
dc.subject.other Atmospheric sciences en_US
dc.subject.other Atmospheric sciences en_US
dc.title Reconciling tropospheric temperature trends from the microwave sounding unit en_US
dc.type Thesis en_US
dc.embargo.terms Restrict to UW for 1 year -- then make Open Access en_US

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