Tag: troposphere

The troposphere is expanding due to anthropogenic climate change

– By Jane Liu, Lingyun Meng, David W. Tarasick, William J. Randel, Andrea K. Steiner, Hallgeir Wilhelmsen, Lei Wang, Leopold Haimberger, and Wayne K. Hocking –

The tropopause is a transition between the troposphere and the stratosphere above it. Air temperature decreases with altitude from the surface to the tropopause because the surface is a heat source, while above the tropopause, air temperature increases with altitude because the ozone layer in the middle stratosphere is a second heat source. In other words, the tropopause is an altitude where temperature typically reaches a minimum. In some special cases, temperature decreases with altitude again above the tropopause, and then increases with altitude, forming a second tropopause. Rarely, a third tropopause can be formed. Here we only consider the first tropopause.

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The MOPITT Terra spacecraft launch showing the Atlas IIAS lift-off on 18th December 1999 (Photo credit: Jim Drummond)

MOPITT, Atmospheric Pollution, and Me: A Personal Story

– By Jim Drummond, Principal Investigator for the Measurements Of Pollution in The Troposphere (MOPITT) instrument on the Terra satellite –

It’s 1987 and I have just bought my first personal computer – an IBM PC clone running at a stunning 8MHz! I’m also on sabbatical at the National Center for Atmospheric Research (NCAR) in Boulder, Colorado,

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