Trends in middle- and upper-level tropospheric humidity from NCEP reanalysis data

  title={Trends in middle- and upper-level tropospheric humidity from NCEP reanalysis data},
  author={G. Paltridge and A. Arking and M. Pook},
  journal={Theoretical and Applied Climatology},
The National Centers for Environmental Prediction (NCEP) reanalysis data on tropospheric humidity are examined for the period 1973 to 2007. It is accepted that radiosonde-derived humidity data must be treated with great caution, particularly at altitudes above the 500 hPa pressure level. With that caveat, the face-value 35-year trend in zonal-average annual-average specific humidity q is significantly negative at all altitudes above 850 hPa (roughly the top of the convective boundary layer) in… Expand
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