Flentje, Harald and Dörnbrack, Andreas and Ehret, Gerhard and Fix, Andreas and Schumann, Ulrich
(2004)
Meridional Water Vapor Transport in Tropical and Sub-Tropical Regions.
In: HIBISCUS/TROCCINOX/TroCCiBras, pp. 1-4.
Workshop, 2004-11-15 - 2004-11-19, Bauru, (BRA).
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Abstract
Airborne differential absorption lidar (DIAL) measurements of tropospheric water vapor and aerosol from south Europe to Brazil in mid-March 2004 are presented and compared to operational analyses of the Euro-pean Center for Medium Range Weather Forecast (ECMWF). The two 2-D sections across the tropical and sub-tropical Atlantic (5°S–37°N) reveal two different meteorological regimes. South of 20°N the Hadley circulation is evident as a humid fountain near the equator with synoptic scale inflow below 4 km (16°N) to 8 km (0°N), upper tropospheric (UT) outflow till 15°N and a dry sub-tropical subsidence layer in between. The 2nd section along the north-west African coast is controlled by mid-latitude dynamics. A deep strato-spheric intrusion is associated with the cyclonic shear along a trough from the Canary Islands towards Gi-braltar. In the sub-tropical layer and the intrusion, H2O mixing ratios q 0.01-0.1 g/kg are measured while q > 0.5 g/kg is found in the lower tropospheric air having been lifted to UT levels. The dynamical features and the water vapor mixing ratios are quite accurately analysed by the ECMWF at T511/L60 operational resolution. Largest deviations arise from shifts of structures/gradients and occasionally from assimilation inaccuracies. The averaged q-bias between both data fields is below 10%. While at mid-latitudes low water vapor regions are associated with filaments of enhanced particle backscatter, the H2O signature of the tropi-cal circulation is not correlated with the aerosol.
Item URL in elib: | https://elib.dlr.de/49819/ |
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Document Type: | Conference or Workshop Item (Speech) |
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Title: | Meridional Water Vapor Transport in Tropical and Sub-Tropical Regions |
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Authors: | Authors | Institution or Email of Authors | Author's ORCID iD | ORCID Put Code |
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Flentje, Harald | UNSPECIFIED | UNSPECIFIED | UNSPECIFIED | Dörnbrack, Andreas | UNSPECIFIED | UNSPECIFIED | UNSPECIFIED | Ehret, Gerhard | UNSPECIFIED | UNSPECIFIED | UNSPECIFIED | Fix, Andreas | UNSPECIFIED | UNSPECIFIED | UNSPECIFIED | Schumann, Ulrich | UNSPECIFIED | UNSPECIFIED | UNSPECIFIED |
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Date: | 2004 |
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Journal or Publication Title: | HIBISCUS/TROCCINOX/TroCCiBras |
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Refereed publication: | No |
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Open Access: | Yes |
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Gold Open Access: | No |
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In SCOPUS: | No |
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In ISI Web of Science: | No |
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Page Range: | pp. 1-4 |
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Editors: | Editors | Email | Editor's ORCID iD | ORCID Put Code |
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Held, Gerhard | UNSPECIFIED | UNSPECIFIED | UNSPECIFIED |
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Status: | Published |
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Keywords: | Water vapour, Lidar, TROCCINOX |
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Event Title: | Workshop |
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Event Location: | Bauru, (BRA) |
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Event Type: | international Conference |
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Event Start Date: | 15 November 2004 |
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Event End Date: | 19 November 2004 |
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Organizer: | IPMet |
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HGF - Research field: | Aeronautics, Space and Transport (old) |
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HGF - Program: | Space (old) |
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HGF - Program Themes: | W EO - Erdbeobachtung |
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DLR - Research area: | Space |
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DLR - Program: | W EO - Erdbeobachtung |
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DLR - Research theme (Project): | W - Vorhaben LIDAR-Forschung und -Entwicklung (old) |
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Location: |
Oberpfaffenhofen
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Institutes and Institutions: | Institute of Atmospheric Physics > Lidar |
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Deposited By: |
Schumann, Prof.Dr.habil. Ulrich
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Deposited On: | 16 Jul 2007 |
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Last Modified: | 24 Apr 2024 19:12 |
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