Katabatic winds in Adélie Coast

AbstractThe lichen flora and habitats in the Syowa region of continental Antarctica were surveyed. The distribution patterns of lichens appear to reflect habitat salinity, derived from wind-blown sea spray. Some halotolerant species are established in saline habitats where snow dunes are well developed. Snow and ice ameliorate the salinity of the habitat and provide a major source of moisture for lichens. Wind-borne drift snow carried by katabatic winds or occasional snow showers also provide the source of moisture to lichens growing on dry rock habitats in the Syowa region.

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Local Katabatic Winds of the Russian Federation and Their Observation Using Synthetic Aperture Radar Imagery

Izvestiya Atmospheric and Oceanic Physics ◽

10.1134/s0001433820090121 ◽

2020 ◽

Vol 56 (9) ◽

pp. 989-1006

Author(s):

A. Yu. Ivanov

Keyword(s):

Synthetic Aperture Radar ◽

Russian Federation ◽

Synthetic Aperture ◽

Katabatic Winds ◽

Radar Imagery ◽

The Russian Federation ◽

Synthetic Aperture Radar Imagery ◽

Aperture Radar

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Observations of the Antarctic ice sheet with the Seasat scatterometer: relation to katabatic-wind intensity and direction

Journal of Glaciology ◽

10.3189/s002214300001604x ◽

1993 ◽

Vol 39 (132) ◽

pp. 385-396

Author(s):

M. Ledroit ◽

F. Remy ◽

J.-F. Minster

Keyword(s):

Incidence Angle ◽

Ice Sheet ◽

Katabatic Wind ◽

Katabatic Winds ◽

Antarctic Ice Sheet ◽

Scatter Coefficient ◽

Low Incidence ◽

Ocean Wind ◽

Wind Intensity ◽

The Antarctic

AbstractThe Seasat A satellite scatterometer radar, initially designed to measure ocean-wind intensity and direction, also provided observations on the Antarctic ice sheet. The signal of the back-scatter coefficient decreases strongly from 10 to −20 dB when the incidence angle of the observations increases from 0° to 65°. An additional 5 dB signal is found, which is correlated with the direction and intensity of katabatic winds, independent of the incidence angle and polarization of the signal. By using simplified models of the volume-scattering within the snowpack (which is mostly sensitive to snow grain-size) and surface-scattering from the air-snow interface (which depends on roughness), it is evident that the signal of the scatterometer could result from the effects of snow dunes at low incidence angle, and of micro-roughness and volume back-scatter at incidence angles greater than 25°. The instrument therefore provides a means of measuring the direction and intensity of katabatic winds.

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Orographic clouds in north Victoria Land from AVHRR images

Polar Record ◽

10.1017/s003224740006753x ◽

1996 ◽

Vol 32 (183) ◽

pp. 317-324 ◽

Cited By ~ 6

Author(s):

Giuseppe Zibordi ◽

Massimo Frezzotti

Keyword(s):

High Resolution ◽

Satellite Imagery ◽

Meteorological Data ◽

Spectral Features ◽

Katabatic Winds ◽

Victoria Land ◽

Avhrr Data ◽

Orographic Clouds ◽

Temporal Occurrence ◽

Very High

ABSTRACTOrographic clouds over north Victoria Land, East Antarctica, have been observed in Advanced Very High Resolution Radiometer (AVHRR) satellite imagery. These occasional clouds are discussed through analysis of their spectral features in AVHRR data. Temporal occurrence, spatial extension, and direction of the clouds are also discussed in relation to meteorological data for two periods characterised by katabatic winds, in December 1992 and January 1993.

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