Universität zu Köln

Redl, Robert ORCID: 0000-0003-3055-7603, Fink, Andreas H. ORCID: 0000-0002-5840-2120 and Knippertz, Peter ORCID: 0000-0001-9856-619X (2015). An Objective Detection Method for Convective Cold Pool Events and Its Application to Northern Africa. Mon. Weather Rev., 143 (12). S. 5055 - 5073. BOSTON: AMER METEOROLOGICAL SOC. ISSN 1520-0493

Full text not available from this repository.

Abstract

Convective cold pool events in (semi) arid areas have significant impacts on their environment. They reach horizontal extents of up to several hundred kilometers and the associated turbulence and shear can cause dust emissions and threaten aviation safety. Furthermore, cold pools play a major role in the organization of deep convection and in horizontal moisture transport. They have even been proposed to have impacts on larger-scale monsoon dynamics. Cold pools are not well represented in models using a convective parameterization. To test and improve these models, it is necessary to reliably detect cold pool occurrence from standard observational data. Former studies, however, focused on single cases or short time periods.Here, an objective and automated method for the generation of multiyear climatologies of cold-pool events is presented. The algorithm combines standard surface observations with satellite microwave data. Representativeness of stations and influence of their spatial density are addressed by comparison to a satellite-only climatology. Applying this algorithm to data from automatic weather stations and manned synoptic stations in and south of the Atlas Mountains in Morocco and Algeria reveals the frequent occurrence of cold pool events in this region. On the order of six cold-pool events per month are detected from May to September when the Saharan heat low is in its northernmost position. The events tend to cluster into several-days-long convectively active periods, often with strong events on consecutive days. The algorithm is flexible enough to be applied in comparable regions around the world.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Redl, Robert UNSPECIFIED orcid.org/0000-0003-3055-7603 UNSPECIFIED Fink, Andreas H. UNSPECIFIED orcid.org/0000-0002-5840-2120 UNSPECIFIED Knippertz, Peter UNSPECIFIED orcid.org/0000-0001-9856-619X UNSPECIFIED
URN:	urn:nbn:de:hbz:38-386250
DOI:	10.1175/MWR-D-15-0223.1
Journal or Publication Title:	Mon. Weather Rev.
Volume:	143
Number:	12
Page Range:	S. 5055 - 5073
Date:	2015
Publisher:	AMER METEOROLOGICAL SOC
Place of Publication:	BOSTON
ISSN:	1520-0493
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language INTERACTIONS CAUSING PRECIPITATION; RADIATIVE-TRANSFER; DIURNAL CYCLE; SAHARA DESERT; DUST; MESOSCALE; CLOUDS; PARAMETERIZATION; TRANSPORT Multiple languages Meteorology & Atmospheric Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/38625