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Abstract: This paper focuses on the daily cycle of the surface energy balance and the atmospheric surface layer during a detailed meteorological experiment performed near Kohnen base in Dronning Maud Land, East Antarctica, in January and February 2002. Temperature, specific humidity, wind speed and...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1038.4600 2023-05-15T13:34:24+02:00 Van As.qxp MICHIEL VAN DEN BROEKE Dirk Van As Roderik Van De Wal General User The Pennsylvania State University CiteSeerX Archives 2005 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1038.4600 http://www.staff.science.uu.nl/%7Ewal00105/papers/vanasetal2005b.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1038.4600 http://www.staff.science.uu.nl/%7Ewal00105/papers/vanasetal2005b.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.staff.science.uu.nl/%7Ewal00105/papers/vanasetal2005b.pdf text 2005 ftciteseerx 2020-03-08T01:19:00Z Abstract: This paper focuses on the daily cycle of the surface energy balance and the atmospheric surface layer during a detailed meteorological experiment performed near Kohnen base in Dronning Maud Land, East Antarctica, in January and February 2002. Temperature, specific humidity, wind speed and the turbulent scales of these quantities, exhibit a strong daily cycle. The sensible heat flux cycle has a mean amplitude of ~ 8 W m -2 , while the latent heat flux has an amplitude of less than 2 W m -2 , which is small compared to the amplitude of net radiation (~ 35 W m -2 ) and sub-surface heat (~ 25 W m -2 ). Between ~ 9 and 16 h GMT convection occurs due to a slightly unstable atmospheric surface layer. At the end of the afternoon, the wind speed decreases abruptly and the mixed layer is no longer supported by the sensible heat input; the stratification becomes stable. At night a large near-surface wind shear is measured due to the presence of a nocturnal jet, which is likely to be katabatically driven, but can also be the result of an inertial oscillation. No strong daily cycle in wind direction is recorded, since both the katabatic forcing at night and the daytime forcing by the large-scale pressure gradient were directed approximately downslope during the period of measurement. Text Antarc* Antarctica Dronning Maud Land East Antarctica Unknown Dronning Maud Land East Antarctica Kohnen ENVELOPE(0.000,0.000,-75.000,-75.000) |
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Abstract: This paper focuses on the daily cycle of the surface energy balance and the atmospheric surface layer during a detailed meteorological experiment performed near Kohnen base in Dronning Maud Land, East Antarctica, in January and February 2002. Temperature, specific humidity, wind speed and the turbulent scales of these quantities, exhibit a strong daily cycle. The sensible heat flux cycle has a mean amplitude of ~ 8 W m -2 , while the latent heat flux has an amplitude of less than 2 W m -2 , which is small compared to the amplitude of net radiation (~ 35 W m -2 ) and sub-surface heat (~ 25 W m -2 ). Between ~ 9 and 16 h GMT convection occurs due to a slightly unstable atmospheric surface layer. At the end of the afternoon, the wind speed decreases abruptly and the mixed layer is no longer supported by the sensible heat input; the stratification becomes stable. At night a large near-surface wind shear is measured due to the presence of a nocturnal jet, which is likely to be katabatically driven, but can also be the result of an inertial oscillation. No strong daily cycle in wind direction is recorded, since both the katabatic forcing at night and the daytime forcing by the large-scale pressure gradient were directed approximately downslope during the period of measurement. |
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The Pennsylvania State University CiteSeerX Archives |
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MICHIEL VAN DEN BROEKE Dirk Van As Roderik Van De Wal General User |
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MICHIEL VAN DEN BROEKE Dirk Van As Roderik Van De Wal General User Van As.qxp |
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MICHIEL VAN DEN BROEKE Dirk Van As Roderik Van De Wal General User |
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MICHIEL VAN DEN BROEKE Dirk Van As |
title |
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publishDate |
2005 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1038.4600 http://www.staff.science.uu.nl/%7Ewal00105/papers/vanasetal2005b.pdf |
long_lat |
ENVELOPE(0.000,0.000,-75.000,-75.000) |
geographic |
Dronning Maud Land East Antarctica Kohnen |
geographic_facet |
Dronning Maud Land East Antarctica Kohnen |
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Antarc* Antarctica Dronning Maud Land East Antarctica |
genre_facet |
Antarc* Antarctica Dronning Maud Land East Antarctica |
op_source |
http://www.staff.science.uu.nl/%7Ewal00105/papers/vanasetal2005b.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1038.4600 http://www.staff.science.uu.nl/%7Ewal00105/papers/vanasetal2005b.pdf |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766052395647762432 |