Troposphere-to-stratosphere transport in the tropics - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Comptes Rendus Géoscience Année : 2010

Troposphere-to-stratosphere transport in the tropics

Jean-Pierre Pommereau

Résumé

The analysis of the data collected over Brazil, Northern Australia and Africa from balloons, high altitude aircraft and satellites during the recent HIBISCUS, TROCCINOX, SCOUT-O3 and AMMA European campaigns, has led to significant revision in the understanding of troposphere-to-stratosphere transport. Repeated observations of strong updrafts of adiabatically cooled and washed-out tropospheric air rich in chemical and greenhouse gases by convective overshooting over the three continents, demonstrate the high frequency of occurrence of such events in contrast to their generally assumed scarcity. Moreover, global scale information provided by ODIN and CALIPSO satellite observations suggests that the mechanism could play a major, if not dominant, role in troposphere-to-stratosphere transport in contrast to the generally evoked slow ascent by radiative heating. Ignored by global scale models because of their limited extension and duration, convective overshootings might have a significant impact on the chemistry and climate of the stratosphere.

Dates et versions

hal-00448401 , version 1 (01-09-2020)

Identifiants

Citer

Jean-Pierre Pommereau. Troposphere-to-stratosphere transport in the tropics. Comptes Rendus Géoscience, 2010, 342 (4-5), pp.331-338. ⟨10.1016/j.crte.2009.10.015⟩. ⟨hal-00448401⟩
95 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More