Sentences with phrase «mean specific humidity»
From a few cursory examinations of geographical differences between the models, much of the differences in monthly - mean specific humidity (and many other variables) between the reanalysis products occurs in the tropics.
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Consistent with reanalysis data (Fig. 4) and theoretical considerations (36, 39), continental rainfall is assumed to be proportional to the mean specific humidity within the atmospheric column The effect of an offset between these quantities does not change the model behavior qualitatively (see SI Appendix).
Not exact matches
Daily mean NCEP / NCAR reanalysis data are used as atmospheric forcing, i.e., 10 - m surface winds, 2 - m surface air temperature (SAT), specific humidity, precipitation, evaporation, downwelling longwave radiation, sea level pressure, and cloud fraction.
I acquired the latter monthly mean and plotted up the Specific Humidity q for 1989 - 2007, Northern Hemisphere (20 - 50N) midlatitudes for July / August.
It is also not surprising that the Tibetan plateau specific humidity at this pressure level is considerably higher than the zonal mean (3.5 - 4 times larger during the summer).
library (ncdf) ncep500 = open.ncdf («NCEP.nc») ncep500 [1] «file NCEP.nc has 4 dimensions:» [1] «lat Size: 73» [1] «level Size: 1» [1] «lon Size: 144» [1] «time Size: 361» [1] «----------------» [1] «file NCEP.nc has 1 variables:» [1] «short shum [lon, lat, level, time] Longname: Monthly Mean of Specific Humidity Missval: 32766 ″ nc500 = get.var.ncdf (ncep500) dim (nc500)[1] 144 73 361 nc25SN = nc500 -LSB-, mean (c (27:47)-RRB-,] dim (nc25SN)[1] 144 361 SN25 = colMeans (nc25SN) x = 1:361 lmSN25 = lm (SN25 ~ x) summary (lmSN25) acf (residuals (lmSN25)-RRB- $ acf [2][1] 0.5715495 plot (x, SN25, type =» b», main =» Specific Humidity 25S to 25N from 01/1979 to 01/2009 ″, xlab = «Months Starting at 01/1979 ″, ylab =» Secific Humidity», col =» dark red»)
This means that changes in specific humidity in the upper troposphere (300 — 700 mb) may be very significant even though the amount of water vapour there is low due to the cold temperatures.