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Images: Oceans & Climate

Annual surface temperature change in degrees Centigrade for the period 1975?1994 relative to 1955?1974. This figure, prepared for the 1996 Intergovernmental Panel on Climate Change, indicates that Earth?s surface has been, on average, warmer (predominating orange) over the past 20 years compared to the preceding 20 years. The cooler blue areas show, however, that the warming has not been universal.
Hemispheric and global average temperature for the past 135 years.
Scientists aboard R/V Knorr launch a rosette water sampler and conductivity/temperature/depth instrument. Much of the data discussed in this issue was collected by such equipment. Author McCartney is the fellow getting wet at top left.
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