Antarctica Sea Ice Extent and Albedo

In Antarctica Sea Ice Extent has been setting record after record. It is mid summer and as of today there is 9.2 million sq km of sea ice.

That is 3.4 million sq km more than in 1980.

The albedo implications (which are only discussed by “scientists” in relation to the arctic) are important.

The following info is from a post I did in 2012 and is worth reposting (just remember it was from September 2012):

What is the impact of more Antarctic Sea Ice? Many warmists claim that less Arctic Sea Ice will have a more dramatic effect on earth’s albedo than increasing Antarctic Sea Ice.

Poster RACookPE1978 at WUWT disagrees and I hope he does not mind me reblogging  his comment here.

“The Antarctic Sea Ice at its 16.5 million km^2 maximum near the equinox in mid-September is a near crown-shape: A circular ring whose edge is between 62 south and 60 south latitude. During its mid-winter GROWTH range – that period BEFORE its maximum extent when its will reflect the most solar energy – it will have about 50% of its area between 66.5 south (the Antarctic Circle) and 60 south latitude.

Now, at that latitude, EVEN AT MID NH SUMMER (darkest time of the year for the Antarctic continent in mid-winter) the Antarctic sea ice WILL be reflecting light energy … for the simple reason that the Antarctic sea ice is exposed to southern hemisphere sunlight every day – even at the shortest day if the winter at June 22.

BUT … Antarctic Sea Ice is NOT at its maximum at mid-winter (the darkest days), but rather, Antarctic Sea Ice is at its maximum at the equinox when there IS sunlight for 12 hours per every latitude on the planet. Further, Antarctic Sea Ice at its maximum IS exposed to strongly absorbed sunlight at solar incidence angle between 15 and 30 degrees for 10 of those 12 hours. Worse, from a cooling world standpoint, a DECREASE in Arctic Sea ice from its present “circular cap” up between 81 north latitude and the pole DOES NOT result in increased solar absorption into the exposed sea surface, but rather an increased LOSS of heat energy from the exposed water due to evaporation and radiation.

The difference? The angle of the incidence sunlight. In the Antarctic, the light is inbound on the newly freezing sea ice at 30 degrees angle: At 30-25 degrees incidence angle, open water absorbs 90-95% of the inbound energy, sea ice reflects about 98 percent of the incident energy.

in the Arctic, at 4-8 degrees incidence angle, open (rough) water reflects 95% of the solar energy. Ice reflects about 98% of the incoming solar energy. Open water loses another 117 watts/m^2 compared to ice-covered water.

Thus, “simple” physics and geography shows that an increase in Antarctic Sea by 1.5 million km^2 ABOVE its previous “average” of 15.0 million km^2 SIGNIFICANTLY increases heat loss from the planet. An (potential) loss even of the entire remaining sea ice of 3.4 million km^2 increases heat loss from the planet.

And NO IPCC report nor ANY climate model predicts ANY increase in Antarctic sea ice at the same time as a Arctic Sea Ice decline. They only predict sea ice declines due to “a warming world” and “prove” a warming world by that same sea ice decline.”


4 thoughts on “Antarctica Sea Ice Extent and Albedo

  1. Thank you for reposting this per the discussion from Day 365 sea ice extent. When you look at the increase in NH snow cover extent as well as the albedo effect from increasing Antarctic sea ice, it easily could explain the lack of global warming for 18 years, or at least, should be considered more significant than merely a dismissive shrug by the IPCC followers.

  2. Interesting post, >albedo an additional factor in triggering an ice age, maybe……….+ NH snow cover, + solar influence is ‘going quiet’. Yup for cryologists these are interesting times, for the rest of us inwardly we shiver at the thought and as I often say, natural warming is a boon for mankind, what we should be truly frightened of – is a prolonged period – of a cooling phase.

  3. The increase in Antarctica Sea Ice is due to reduced output from the Sun. The area under the curve [integral] of total number of Sun spots [or Solar EVU] is 1/5 of Solar cycle 22, i.e., 1990. Since the Sun spots do not measure “energy”, they are an indication; but, the Solar EVU is energy! The Solar EVU directly produces more OZONE. More EVU, the Ozone layer becomes thicker. Ozone is a green house gas. When there is more Ozone the upper atmosphere gets “thicker” expanding due to the “heat [energy]”. NASA monitors this and produces reports for satellite operators, since the atmosphere can expand so much that it can affect the orbits.

    The OZONE layer acts as a blanket of insulation keeping infrared radiation [heat] trapped near the surface of the planet. When OZONE holes open, the radiation [heat] escapes.

    Simply, less Solar EUV more Antarctica and Arctic Sea Ice. Unless Solar EUV increases, expect the Polar Sea Ice Area, Extent, thickness to increase dramatically over the next 10 years. Expect Polar Vortex “breakouts” to drive temperatures down to -30 to -60 F in Canada and Minnesota regions during winter. During Summer expect reduced temperatures!

    Solar EUV > 130 -> warming
    Solar EUV > 100 holding constant
    Wolar EUV cooling

    Note: Solar EUV measured under the curve gives different values for warming, etc.

    OZONE values graphical display web sites:

  4. I wonder how can those smart enough to be scientists look at the current global sea ice and snow-cover trends and honestly suggest those trends predict warming?

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