Monitoring Stratospheric Temperature and Trends with Satellite Data March 3, 2005 R. Lin, A. J....
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![Page 1: Monitoring Stratospheric Temperature and Trends with Satellite Data March 3, 2005 R. Lin, A. J. Miller, C. Long, J. Wild, M. E. Gelman, S. Zhou, R. M.](https://reader035.fdocuments.net/reader035/viewer/2022062511/5515fa4455034694308b48d5/html5/thumbnails/1.jpg)
Monitoring Stratospheric Temperature and Trends with Satellite Data
March 3, 2005
R. Lin, A. J. Miller, C. Long, J. Wild,
M. E. Gelman, S. Zhou, R. M. Nagatani (Ret)
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Major Elements
• Total Ozone: SBUV/(/2) 1979-2004• Temperature Profiles: SSU 1979-2004• Temperature: MSU(4) 1979-2004
• Question: In an atmosphere where ozone is “recovering” and CO2 increasing, how do we separate temperature impacts?
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Differences between zonal averages of SSU channel 25 radiance,simultaneous measurements from different spacecraft
-2
-1.5
-1
-0.5
0
0.5
1
1.5
2
-70 -50 -30 -10 10 30 50 70
Latitude [degrees]
Ra
dia
nc
e d
iffe
ren
ce
[r.
u.]
TN-N6
N7-N6,02/1982
N7-N6,07/1982
N7-N6,11/1982
N7-N8,08/1983
N7-N8,02/1984
N9-N6,1985/86
average ofnormal
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Channel 25
• Instruments generally match within about 0.3 radiance units
• Exception is NOAA-9 which is about 0.5 radiance unit higher than others
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Channel 26
• Instruments generally match within 2 radiance units
• Exception is NOAA-7 which is about 3 radiance units high
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Channel 27
• Spectroscopic and tidal effects dominate
• General agreement between instruments of about 3 radiance units in equatorial region, increasing to about 5 radiance units in polar latitudes
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AMSU => SSU
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John Nash (UKMO) SSU Channels
Channel Peak of Weighting Function
47X 0.5 hPa
27 1.5
36X 2.0
26 6.0
25 15.0
26X 20.0
15X 50.0
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AMSU => SSU via Statistical Regression NOAA-16 AMSU vs NOAA-14 SSU
10/00 – 10/02
14
SSU25, etc = a0 + ai x AMSUi
i=9
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SSU/AMSU Standard Error of Regression 10/00 – 10/02
47x
2736x
262526x15x
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The End