Here is a brief satellite animation
of katabatic flow off of Antarctica (from 2014).
Liu, Z., and D.H. Bromwich, 1997: Dynamics
of the katabatic wind confluence zone near Siple Coast, West Antarctica.
Not exact matches
What with
katabatic winds that blow men off their feet, H / T ter Sir Douglas Mawson describing Cape Denisen, «home
of the blizzard,» hmm, those wind turbines are going ter be thrumming and spinning like you wouldn't believe... oops... wh oo oo oosh... there goes another one!
«Below 60 ° S winds are largely
katabatic, this is a result
of cold air forming over the pole and falling (as cold air is heavier).
There is a very useful analysis
of Antarctic climate in an article
of David Brockett, 2005, «Antarctic
katabatic winds».
Reminds me
of the cold
katabatic winds coming from the high regions
of Antarctica and blowing north to 60S latitude.
These authors postulated an extended Barents Sea Ice Sheet, the western part
of the huge Eurasian Ice Sheet51, 55, that had reached the shelf edge causing polynya - like open - water conditions (triggered by strong
katabatic winds) with phytoplankton and sea ice algae production, subglacial meltwater outflow and the deposition
of suspended material on the slope at site PS2138 - 2.
Such an extended ice sheet associated with strong
katabatic winds should have caused polynya - like open - water conditions in front
of the ice sheet (Fig. 5a), resulting in increased fluxes
of phytoplankton, ice algae and terrigenous matter as observed in the PS2757 - 8 record (Fig. 2c and Fig. 6, Scenario 2), i.e., a situation similar to that proposed for the Barents Sea continental margin (Fig. 5a) 57, 58.
Katabatic winds are warmer at the bottom
of their descent than the cold mountain start.
There are some regions
of the atmosphere where lapse rates
of -9 to -10 K / km have been observed, e.g., in parts
of Antarctica affected by
katabatic winds.
The surface
katabatic wind regime, directed equatorwards and down the Antarctic coastal escarpment, closes the lower branch
of the circulation (Parish and Bromwich 2007).
Over the coastal escarpment, the regression coefficients
of temperature anomalies with the SAM are an indication that the SAM is tied with the surface energy balance and modulation
of the thermally direct circulation as described by Parish and Bromwich (2007); the
katabatic winds mix sensible heat towards the surface to balance longwave cooling (van den Broeke et al. 2006).
It is not as windy in the Arctic as near the Antarctic coast, in part because the pressure gradients are weaker, and because
katabatic winds do not exist over most
of the Arctic.
Extremely cold (
katabatic) winds blowing off the Antarctic Ice Sheet, push water and sea ice offshore, contributing to high rates
of sea ice formation.