期刊
GEOPHYSICAL RESEARCH LETTERS
卷 27, 期 21, 页码 3453-3456出版社
AMER GEOPHYSICAL UNION
DOI: 10.1029/2000GL012133
关键词
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Stratospheric water vapor concentrations measured at two midlatitude locations in the northern hemisphere show water vapor amounts have increased at a rate of 1-1.5% yr(-1) (0.05-0.07 ppmv yr(-1)) for the past 35 years. At Washington, D.C., measurements were made from 1964-1976, and at Boulder, Colorado, observations began in 1980 and continue to the present. While these two data sets do not comprise a single time series, they individually show increases over their respective measurement periods. At Boulder the trends do not show strong seasonal differences; significant increases are found throughout the year in the altitude range 16-28 km. In winter these trends are significant down to about 13 km.
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