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Observed development of the vertical structure of the marine boundary layer during the LASIE experiment in the Ligurian Sea (Articolo in rivista)

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Observed development of the vertical structure of the marine boundary layer during the LASIE experiment in the Ligurian Sea (Articolo in rivista) (literal)

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Sempreviva A. M.; Schiano M. E.; Pensieri S.; Semedo A.; Tomé R.; Bozzano R.; Borghini M.; Grasso F.; Soerensen L. L.; Teixeira J.; Transerici C. (2010)
Observed development of the vertical structure of the marine boundary layer during the LASIE experiment in the Ligurian Sea
in Annales geophysicae (1988); Copernicus Publications, Göttingen (Germania)
(literal)

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Sempreviva A. M.; Schiano M. E.; Pensieri S.; Semedo A.; Tomé R.; Bozzano R.; Borghini M.; Grasso F.; Soerensen L. L.; Teixeira J.; Transerici C. (literal)

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1. CNR ISAC, I-88046 Lamezia Terme, Italy 2. Risoe DTU, DK-4000 Roskilde, Denmark 3. CNR ISMAR, I-16149 Genoa, Italy 4. CNR ISSIA, I-16149 Genoa, Italy 5. Uppsala Univ, Dept Earth Sci, S-75182 Uppsala, Sweden 6. Azores Univ, Ctr Clima Meteorol & Mudancas Globais, P-97100 Terceira, Portugal 7. CNR ISMAR, I-19100 La Spezia, Italy 8. CNR ISAC, I-73100 Lecce, Italy 9. Univ Aarhus, Natl Environm Res Inst, DK-4000 Roskilde, Denmark 10. CALTECH, Jet Prop Lab, Pasadena, CA 91109 USA 11. CNR ISAC, I-00133 Rome, Italy (literal)

Titolo

Observed development of the vertical structure of the marine boundary layer during the LASIE experiment in the Ligurian Sea (literal)

Abstract

In the marine environment, complete datasets describing the surface layer and the vertical structure of the Marine Atmospheric Boundary Layer (MABL), through its entire depth, are less frequent than over land, due to the high cost of measuring campaigns. During the seven days of the Ligurian Air-Sea Interaction Experiment (LASIE), organized by the NATO Undersea Research Centre (NURC) in the Mediterranean Sea, extensive in situ and remote sensing measurements were collected from instruments placed on a spar buoy and a ship. Standard surface meteorological measurements were collected by meteorological sensors mounted on the buoy ODAS Italia1 located in the centre of the Gulf of Genoa. The evolution of the height (z(i)) of the MABL was monitored using radiosondes and a ceilometer on board of the N/O Urania. Here, we present the database and an uncommon case study of the evolution of the vertical structure of the MABL, observed by two independent measuring systems: the ceilometer and radiosondes. Following the changes of surface flow conditions, in a sequence of onshore - offshore - onshore wind direction shifting episodes, during the mid part of the campaign, the overall structure of the MABL changed. Warm and dry air from land advected over a colder sea, induced a stably stratified Internal Boundary Layer (IBL) and a consequent change in the structure of the vertical profiles of potential temperature and relative humidity. (literal)

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