Title Patterns of North African dust transport over the Atlantic; winter vs. summer, based on CALIPSO first year data
Author Ben-Ami, Y.; Koren, I.; Altaratz, O.
Author Affil Ben-Ami, Y., Weizmann Institute of Science, Department of Environmental Sciences and Energy Research, Rehovot, Israel
Source Atmospheric Chemistry and Physics, 9(20), p.7867-7875, . Publisher: Copernicus, Katlenburg-Lindau, International. ISSN: 1680- 7316
Publication Date 2009
Notes In English. Published in Atmospheric Chemistry and Physics Discussions: 15 June 2009, http://www.atmos-chem-phys- discuss.net/9/13177/2009/acpd-9-13177- 2009.html ; accessed in May, 2011. 52 refs. GeoRef Acc. No: 310495
Index Terms albedo; altitude; atmospheric boundary layer; backscattering; boundary layer; climate; clouds (meteorology); condensation; crystals; dust; ice; ice crystals; lasers; lidar; radar; remote sensing; sediments; Atlantic Ocean--Gulf of Guinea; Africa--North Africa; Sahara; Africa; Atlantic Ocean; atmosphere; atmospheric transport; biochemistry; clastic sediments; clouds; cycles; geophysical methods; Gulf of Guinea; infrared methods; laser methods; lidar methods; North Africa; North Atlantic; particulate materials; plumes; radar methods; satellite methods; seasonal variations; spatial distribution; transport; vertical- gradient methods
Abstract One of the most important factors that determine the transported dust effect on the atmosphere is its vertical distribution. In this study the vertical structure of North African dust and stratiform low clouds is analyzed over the Atlantic Ocean for the 2006- 2007 boreal winter (December-February) and boreal summer of 2006 (June-August). By using the Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) backscatter measurements over the dust routes, we describe the differences in dust transport between the seasons. We show a bi- modal distribution of the average dust plumes height in both seasons (it is less clear in the winter). The higher plume top height is 5.10.4 km, near the African coast line in the summer and 3.70.4 km in the winter. The lower plume merges with the marine boundary layer, in both seasons. Our study suggests that a significant part of the dust is transported near and within the marine boundary layer and interacts with low stratiform clouds.
URL http://www.atmos-chem-phys.net/9/7867/2009/acp-9-7867-2009.pdf
Publication Type journal article
Record ID 65007106