~Recent summers pressure switchover mechanics have literally saved Arctic sea ice from vanishing more rapidly
~However the real tragedy, these steady summer Arctic Ocean gyre cyclones bring warm weather melting top of Greenland more.
First, winter Arctic High pressures are very cold, they exist over very dry land or icescapes. Polar High pressures of summer are warm, they exist over dry surfaces, consider a mid July wide open 0 to +4 C sea surface temperature as "dry". Arctic Low pressures of winter are warm, they usually come from the South and consist of moist very cloudy turbulent air. Arctic Low pressures of summer are cold, they can come from the North and readily survive and last longer over a mix of open water and broken up sea ice. Frozen surfaces are a great contributor to Arctic fog clouds when summer temperatures are near 0 C. Basic meteorology holds these preceding generalizations consistent for the True North, not necessarily nearer to the equator.
From University of Wyoming archives , there was a significant Gyre Low pressure North of sea of Beaufort, during the first large melt over the Greenland ice sheet in 2019, but on the other side of the Vortex, the Eastern side , there was a High Pressure. This image is exactly flipped during winter. Relatively colder weather naturally languishes between Greenland and Alaska year round, only the pressure configurations change. It is said,
the Canadian side of the Arctic is usually more humid compared to the Russian side, largely because it is often colder by persistent presence of sea ice spared from direct melting by the influence of massive Ellesmere Island and Greenland Glaciers. Now look at 700 mb temperatures on top of Greenland compared to over the Gyre, near 0 C compared to -15 C, it was warmer over the massive Greenland ice sheet than above the Arctic Ocean at the same altitudes. It is unquestionably colder within an Arctic summer Cyclone when top of Greenland melts a lot. Here the North Atlantic High pressure mixed with a hot continental Canadian atmosphere expanded the number of small to modest in size glacial lakes on top of the Northern Hemispheres largest glacier.
We seek a consistent pattern confirmation that can only happen during the largest Greenlandic melt extent day of 2019 on about August 2:
The only way for summer sea ice to melt entirely would require a rather stupendous change in nature from Greenland's cooling effect. It is likely possible with a rather huge summer ice lake covering a significant portion top of Greenland, much nullifying its cooling effect over the Archipelago region, then the coldest place in July Arctic would likely be where clouds dominate, not necessarily above Arctic Ocean gyre current, the coldest place would vary in locations more often allowing an anticyclone to persist longer over the gyre area, when so, the devastation of sea ice should be nearly complete. WD November 6,2019
Thursday, November 7, 2019
Wednesday, November 6, 2019
~ The consequences of ignoring warming Polar regions extends way beyond snow and ice lands.
~We look at one example, where lot's of people live.
And so the Arctic just had record lower sea ice extent minimum again, a few weeks after mid September minima being 2nd lowest ever. In the Arctic, this gave warmer September and October weather with a whole lot more snow and strong blizzards, nothing to worry the world about. But further South, weather patterns have changed not so favorably in some places. We look further away to the place where wildfires rage, California, because there is less rain there for a reason:
The Northwards shift of jet stream or the October 600 mb -20 C line movement towards the high Arctic is strictly the result of vanishing sea ice, during especially about the Arctic sea ice minima, causing massive warming feedbacks, especially for North Pacific sea surface temperatures. These fires were very predictable, because what happens in the Arctic, does not stay there. WD November 5 2019