Orographic Precipitation in the Tropics: The Dominica Experiment
| Autor: | Jeffrey R. French, Ronald B. Smith, Trude Storelvmo, Arlington James, Robert A. Warren, Daniel J. Kirshbaum, Alison D. Nugent, Neil P. Lareau, Phillipe Elie Palany, Justin R. Minder |
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| Přispěvatelé: | Yale University [New Haven], McGill University = Université McGill [Montréal, Canada], Department of Meteorology, University of Reading, Reading, UK, University of Utah, Direction Inter-Régionale des Antilles-Guyane (DIRAG), Météo France, Forestry Division, University of Wyoming (UW) |
| Rok vydání: | 2012 |
| Předmět: |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean
Atmosphere Convection Atmospheric Science 010504 meteorology & atmospheric sciences Convective heat transfer Airflow 0207 environmental engineering Orography 02 engineering and technology Atmospheric sciences 01 natural sciences Aerosol Forced convection Prevailing winds 13. Climate action Climatology Precipitation 020701 environmental engineering ComputingMilieux_MISCELLANEOUS 0105 earth and related environmental sciences |
| Zdroj: | Bulletin of the American Meteorological Society Bulletin of the American Meteorological Society, American Meteorological Society, 2012, 93 (10), pp.1567-1579. ⟨10.1175/BAMS-D-11-00194.1⟩ |
| ISSN: | 1520-0477 0003-0007 |
| Popis: | The Dominica Experiment (DOMEX) took place in the eastern Caribbean from 4 April to 10 May 2011 with 21 research flights of the Wyoming King Air and several other observing systems. The goal was an improved understanding of the physics of convective orographic precipitation in the tropics. Two types of convection were found. During a period of weak trade winds, diurnal thermal convection was seen over Dominica. This convection caused little precipitation but carried aloft air with island-derived aerosol and depleted CO2. During periods of strong trades, mechanically forced convection over the windward slopes brought heavy rain to the high terrain. This convection was “seeded” by trade-wind cumuli or neutrally buoyant cool wet patches of air. In this mechanically forced convection, air parcels did not touch the island surface to gain buoyancy so no island-derived tracers were lofted. With fewer aerosols, the mean cloud droplet diameter increased from 15 to 25 μm. Plunging airflow and a wake were found in the lee of Dominica. The DOMEX dataset will advance our understanding and test our theories of cumulus triggering and aerosol influence on precipitation. |
| Databáze: | OpenAIRE |
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