Specific humidity content of the air has increased, as expected as part of the conventional water vapor feedback, but in fact relative humidity also increased between 1950 and 1990, indicating a stronger water vapor feedback than given by the conventional assumption of fixed relative humidity.
Not exact matches
The long - term NOAA record of tropospheric
humidity from radiosondes and satellites shows that water vapor
content (
specific humidity) has decreased with warming.
The 2009 State of the Climate Report of the US National Oceanic and Atmospheric Administration (NOAA) tells us that climate change is real because of rising surface air temperatures since 1880 over land and the ocean, ocean acidification, sea level rise, glaciers melting, rising
specific humidity, ocean heat
content increasing, sea ice retreating, glaciers diminishing, Northern Hemisphere snow cover decreasing, and so many other lines of evidence.
The decreasing
specific humidity (especially at 300 and 400 mb levels) almost totally offsets the GHE of increasing CO2
content.
BTW, the graph is of *
specific *
humidity (the actual moisture
content of the air), not relative
humidity.
You get the THS only if the lapse rate decreases as temperature goes up because the moist lapse rate gets lower as
specific humidity goes up (higher energy
content / kg).