U.S. Central Plains Vulnerable to Global North America. Last year at the same time the hole Climate Change was as much as 19 million square kilometers. By analyzing how the northern U.S. central The scientists reported that average atmospheric plains changed from forest to grassland and back temperatures at an altitude of 20 kilometers above again during past climate changes, ecologists the region are among the lowest observed in the funded by the National Science Foundation (NSF), past 20 years. These low temperatures lead to the and affiliated with Duke University in North Caro- creation of polar stratospheric cloud particles that lina, have offered further evidence that the region are necessary for ozone destruction by chemicals will likely undergo drastic ecological changes due to take place. to twenty-first-century global climate change. NOAA scientists use satellite instruments and The scientists believe the region responded to cli- balloons to measure the ozone hole. The satellite mea- mate changes lasting decades to centuries during surements were made with the Solar Backscatter the mid-Holocene period (8000-4000 years ago) Ultra-Violet instrument on the NOAA-14 environ- by flip-flopping between grassland and forest. Dur- mental satellite. NASA scientists obtained their data ing this period immediately after
Bulletin of the American Meteorological Society – American Meteorological Society
Published: Nov 1, 1998
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