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

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

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...

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Bibliographic Details
Published in:Annales geophysicae (1988) Vol. 28; no. 1; pp. 17 - 25
Main Authors: SEMPREVIVA, A. M, SCHIANO, M. E, TRANSERICIL, C, PENSIERI, S, SEMEDO, A, TOME, R, BOZZANO, R, BORGHINI, M, GRASSO, F, SOERENSEN, L. L, TEIXEIRA, J
Format: Journal Article
Language:English
Published: Göttingen Copernicus 01-01-2010
Copernicus GmbH
Copernicus Publications
Subjects:
Atmospheric composition and structure
Earth sciences
Earth, ocean, space
Exact sciences and technology
External geophysics
Geovetenskap
Marine
Measuring instruments
NATURAL SCIENCES
NATURVETENSKAP
Ocean-atmosphere interaction
Physics of the ionosphere
Physics of the magnetosphere
Planetary boundary layer
Remote sensing
Transmission and scattering of radiation
Mediterranean Sea
Ligurian Sea
Italy, Genoa
MED, Ligurian Sea
MED
Internal layer
Relative humidity
Radiation scattering
Buoy
Marine atmosphere
boundary layer
Surface layer
remote sensing
case studies
ocean-atmosphere interaction
Ceilometer
Atmospheric composition
Potential temperature
Warm air
winds
Atmospheric boundary layer
Atmospheric composition and structure (Transmission and scattering of radiation)
Height
Dry air
Atmospheric structure
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Summary: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 (zi) 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.
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content type line 23
ISSN:0992-7689
1432-0576
1432-0576
DOI:10.5194/angeo-28-17-2010