Antarctic High Pressure does not seem credible
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Currently in East Antarctic I am seeing two high-pressure domes with 1060mb and 1067mb, resp. (I didn't think such pressures are possible on Earth). In West Antarctic I am seeing domes labeled 'H', with 998mb and 991mb. which seem too low. (I have the Pressure switch enabled)
Is this a bug?
I have screen shots which I can send you.
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@af4ex
https://earth.nullschool.net/#current/wind/surface/level/overlay=mean_sea_level_pressure/orthographic=0.16,-87.08,272/loc=93.173,-81.646GFS confirms 1068 hPa
We must mention that Antarctica is always dominated by high pressure.
Meaningful analysis of surface pressure is difficult because of the elevated nature of much of the continent.
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@af4ex
These 991 or 988 hPa are « relative » high pressure compared to the environment lowest pressure.
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"...« relative » high pressure..."
Yes, I am aware that these are relative readings. But it seemed really unusual to me that a dome having pressure above 1060mb was covering the entire East Antarctic subcontinent, while West Antarctic was displaying "high" pressure areas below 1000mb!
I believe the highest pressure ever recorded in the U.S. was only 1059mb
Thanks,
John/af4ex
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@af4ex
During the cold season, here the austral winter, there are currently high pressures over the pole.
In NH they bring the typical Siberian anticyclone with high pressure figures.
See « Records » in:
https://en.m.wikipedia.org/wiki/Atmospheric_pressure
So 1060 hPa is not unusual in polar region.
This thermic anticyclone is not perfectly centred on the pole itself as shown by @Gkikas-LGPZ
