The Daily Behavior of Pressure and its Influence on the Wind Regime in East Antarctica during Winter 1993 and 1994 (Articolo in rivista)

Type
Label
  • The Daily Behavior of Pressure and its Influence on the Wind Regime in East Antarctica during Winter 1993 and 1994 (Articolo in rivista) (literal)
Anno
  • 2001-01-01T00:00:00+01:00 (literal)
Alternative label
  • I. Petenko and S. Argentini (2001)
    The Daily Behavior of Pressure and its Influence on the Wind Regime in East Antarctica during Winter 1993 and 1994
    in Journal of applied meteorology (1988)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • I. Petenko and S. Argentini (literal)
Pagina inizio
  • 1255 (literal)
Pagina fine
  • 1264 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 40 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Titolo
  • The Daily Behavior of Pressure and its Influence on the Wind Regime in East Antarctica during Winter 1993 and 1994 (literal)
Abstract
  • The analysis of data obtained in 1993-1994 at the Dumont d’Urville meteorological station and at Automatic Weather Stations Dome C, D-47 and D-80 (East Antarctica), shows the existence of a daily variation in surface pressure. Power spectra are characterized by the presence of a pronounced 1/2-day peak while a 1-day peak is only slightly evident. However, the magnitude of the spectral density at 1-day is about 4-6 times higher than that of 1/2-day. This behavior is different from that observed at lower latitudes where two pronounced peaks at 1- and 1/2- day of similar magnitude are observed. The yearly averaged daily pressure time series show two maxima, one at 0900 LT and the other at 2100 LT. The magnitude of this variation increases towards the coast, i.e. varying from 0.25 hPa at Dome C to 0.4-0.6 hPa at Dumont d’Urville. The difference of the daily pressure behavior at individual sites produces a daily variation in the quasi-meridional pressure gradient between different pairs of stations. This quasi-meridional gradient seems to be one of the mechanisms conditioning the wind daily behavior at the near-coastal zones. This is especially true during the winter when the daily variation of the buoyancy difference between inland and coastal zones is weak. The analysis of the daily cycle of wind velocity for different seasons shows that its behavior in winter differs from both the summer and mid-season counterparts. In winter the maximum meridional wind component at Dumont d’Urville is well correlated with the maximum of the pressure gradient. This pressure gradient should be taken into account in modeling the wind regime over Antarctica during winter when the buoyancy gradient daily variation is negligible. (literal)
Prodotto di
Autore CNR

Incoming links:


Prodotto
Autore CNR di
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi
data.CNR.it