Sentences with phrase «specific humidity trends»

Several months ago, I did a quick and dirty, back of the envelope type calculation of globally averaged specific humidity trends using the NCEP / NCAR reanalysis data available on the web for the period 1964 to 2007.

Not exact matches

Similar upward trends in upper - tropospheric specific humidity, which considerably enhance the greenhouse effect, have also been detected from 1982 to 2004.

There is an observed trend of increasing specific humidity.

Have you noted a change in the relative or specific humidity at each station that tracks with the changes in the temperature trend?

-LSB-...] There have been no long - term changes in dewpoint temperatures or specific humidity but rather there has been a decreasing (1947 — 79) and then an increasing (1980 — 2010) trend in both variables.»

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 the tropics and southern midlatitudes and at altitudes above 600 hPa in the northern midlatitudes.

The averages of these seasonal trends are 0.20 C / decade and 0.07 hPa / decade which correspond to a specific humidity increase of 0.04 g / kg per decade and a relative humidity reduction of 0.5 % / decade.

of Paltridge et al. (2009), a clear downward trend in 400 hPa specific humidity is plotted for July / August and then plotted again in Figure 3.

His Figure 6 has the 400 hPa specific humidity from the NCEP Reanalysis from 1948 - 2008 as evidence of a downward global trend, which is similar to Paltridge et al. (2009).

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 the tropics and southern midlatitudes and at altitudes above 600 hPa in the northern midlatitudes.

Apropos of which, in the specific context of long - term trends in tropospheric humidity, it seemed to us that an advantage of the NCEP re-analysis over other re-analyses (over ERA 40 for instance) is that it does not complicate the issue by introducing various types of satellite humidity data into the record as they become available.

Water vapour does in fact change (roughly keeping relative humidity, as opposed to specific humidity, constant) and this has been shown in the real world as a function of volcanic cooling (Soden et al, 2002) and for longer term trends (Soden et al, 2005, discussed here), and is well reproduced in climate models.

And similar patterns in the global trend in variability exist for both temperature and specific humidity.

We found that there is an increasing trend in heat waves and positive specific - humidity anomalies and a decreasing trend in cold waves and negative specific - humidity anomalies.