Tag Archive: tropics

Research brief: New model explores the relationship between humidity, instability, and precipitation in the tropics

November 26, 2019 9:57 am Published by Comments Off on Research brief: New model explores the relationship between humidity, instability, and precipitation in the tropics

In this paper, CLEX researchers considered the steady-state response of the atmosphere to an imposed large-scale flow. They found that under these steady-state conditions, humidity increases with the precipitation rate, while the lapse rate (rate of decrease of temperature with height) increases.

Seminar: Is there any evidence of a poleward expansion in the subtropical jet stream in either hemisphere?

May 1, 2019 2:00 pm Published by Leave your thoughts

Penny Maher (University of Utrecht) The tropics are expanding poleward at about 1 degree per decade in observations. The Hadley cell edge is one common measure of tropical expansion. One alternative method is the trend in the subtropical jet position. Unlike the Hadley cell edge, the observed trends in the subtropical jet position are much smaller and often not significant. This makes us question if current methods adequately identify the subtropical jet position. The “tropopause gradient method” is introduced to... View Article