The difference is that the warming of the Western Antarctica Peninsula was known and is easily explained through atmospheric circulation dynamics — regional warm
air advection patterns.
Not exact matches
What about temperature affecting the cloudiness (e.g.
advection of mild and moist
air), and the role of circulation
patterns?
The
air temperature
patterns were a result of low pressure on the Eurasian side of the Arctic (Figure 8), along with high pressure in the Bering Sea, which supported some warm
air advection into the Chukchi and East Siberian seas region.
With regard to summer meteorological forcing, 2007 was dominated by a strong dipole
pattern in sea level pressure (SLP), with high pressure over the Beaufort Sea and winds blowing from the Bering Strait across the North Pole, promoting both
advection of warm
air and compaction of the ice pack.
June was warmer than average more widely over the Arctic Ocean (Figure 4b); the month saw a weather
pattern similar to the Arctic Dipole, in which higher than average pressure over the American side of the Arctic drives warm
air advection from the Pacific (Figure 4c).
Perhaps taking the time to familiarize oneself with the atmospheric circulation
patterns of the area will show that it is perfectly normal, natural and expected that those particles reach Antarctica through warm
air advection pathways... Just look at a satellite animation.