As expected T - Mobile will notify customers when they reach 90 % of the 200
MB level and then again when they hit 200 MB allowing them the opportunity to select a higher data plan.
Although this is an over simplified model, I believe it is closer to the truth than the current idea that a change in the height of layer of atmosphere near the tropopause, around 100 mb, can affect the temperature of the planet at the 1000
mb level.
The decreasing specific humidity (especially at 300 and 400
mb levels) almost totally offsets the GHE of increasing CO2 content.
An increase of CO2 with constant net solar radiation causes relative humidity to fall in the mid-troposphere, especially at the 400 mb and 300
mb level.
The «500
mb level is often referred to as the steering level as most weather systems and precipitation follow the winds at this level,» which is around 18,000 feet.
Air temperatures (at the 925
mb level) were much higher than normal over the central Arctic (Figure 9), 1 to 2 ˚C above average over much of the region, with small areas in the East Siberian Sea and just north of Greenland over 4 ˚C above normal.