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Published Online August 11, 2005
Science DOI: 10.1126/science.1114772

Reports

Submitted on May 12, 2005
Accepted on July 27, 2005

The Effect of Diurnal Correction on Satellite-Derived Lower Tropospheric Temperature

Carl A. Mears 1 and Frank J. Wentz 1

1 Remote Sensing Systems, Santa Rosa, CA 94501, USA.

Satellite-based measurements of decadal-scale temperature change in the lower troposphere have indicated cooling relative to the surface in the tropics. Such measurements need a diurnal correction to prevent drifts in the satellites' measurement time from causing spurious trends. We have derived a diurnal correction that, in the tropics, is of the opposite sign from that previously applied. When we use this correction in the calculation of lower tropospheric temperature from satellite microwave measurements, we find tropical warming consistent with to that found in surface temperature and in our satellite-derived version of middle/upper tropospheric temperature.


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