What is the average sea level temperature?

Will global warming increase the temperature of the troposphere , or only at sea level?

• I thought global warming is good because it helps to stabilize the atmosphere (air masses) , by means of heating the poles? Global warming warms the poles , but not the equator, so there will be a great reduction in temperature difference--this helps to merge the Ferrel , Hadley and Polar cells. so there will be less erratic weather such as typhoons, hurricanes and cyclones , squalls and gales resulting from differential heating and different temperatures of air masses (which causes great instability). But I'm not too sure whether it heats the Earth at sea/ground level only and not the troposphere where vapor condenses to form clouds. It would be good if global warming can warm the troposphere too! Please answer if you know. Thanks!

• Answer:

  Most models predict greater warming in the middle troposphere than at ground level, but some cooling in the stratosphere. The suspicion (not confirmed either way) is that global warming is likely to cause MORE extreme weather events, not fewer -- just because more energy is trapped near the surface.