Abstract

Most scientists are convinced that global warming is taking place, but satellite measurements have indicated that the Earth's lower atmosphere is in fact cooling. Such discrepancies between satellite data and ground-based instruments have sparked debate between climate researchers, and allowed some politicians to cast doubt on the reality of global warming. Now, however, Frank Wentz and Matthias Schabel of Remote Sensing Systems in California have shown that small changes in the height of satellite can lead to errors in the measured temperatures (Nature 1998 394 661).

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