Computer Science – Sound
Scientific paper
Jan 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3502710s&link_type=abstract
Geophysical Research Letters, Volume 35, Issue 2, CiteID L02710
Computer Science
Sound
22
Global Change: Atmosphere (0315, 0325), Global Change: Remote Sensing (1855), Atmospheric Processes: Middle Atmosphere Dynamics (0341, 0342)
Scientific paper
Stratospheric Sounding Units (SSU) on the NOAA operational satellites have been the main source of near-global temperature trend data above the lower stratosphere. They have been used extensively for comparison with model-derived trends. The SSU senses in the 15 μm band of CO2 and hence the weighting function is sensitive to changes in CO2 concentrations. The impact of this change in weighting function has been ignored in all recent trend analyses. We show that the apparent trends in global-mean brightness temperature due to the change in weighting function vary from about -0.4 Kdecade-1 to 0.4 Kdecade-1, depending on the altitude sensed by the different SSU channels. For some channels, this apparent trend is of a similar size to the trend deduced from SSU data but ignoring the change in weighting function. In the mid-stratosphere, the revised trends are now significantly more negative and in better agreement with model-calculated trends.
Barnett John J.
Randel William J.
Shine Keith P.
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