Snow Arctic and Antarctic
In the winter months, the accumulation of frozen precipitation, beginning in the polar regions and later also in the temperate latitudes, forms a more or less closed one snow. A snow cover that has existed for a long time is - as is the presence of one Ice cover over larger bodies of water and seas - an important climate factor, as it has a temperature-lowering effect in almost all weather conditions. The main reasons are:
- Reflection of solar radiation due to high albedo
- insulating effect, ie hardly any heat gets into the atmosphere from the ground
- Filtering out the humidity, which precipitates as a form of frost on the snow, which in turn enables further cooling
- in the event of a thaw, temperature damping, since melt energy is consumed from the atmosphere
Current snow cover northern hemisphere
Forecast of snow cover northern hemisphere
Some links about snow / snow cover:
- General knowledge about snow
- The build-up of a blanket of snow
- What happens in a blanket of snow?
- Average snow and ice cover in the northern hemisphere
- Institute for Snow and Avalanche Research in the Alps
- Long-term behavior of the snow cover
- About the guaranteed snow in Central Germany and especially in Ore
- Forecast of the snow cover in the northern hemisphere in the next few days (GFS)
- Forecast of snow cover and ice changes in the northern hemisphere in the next 10 days (ECMWF) !
- Worldwide snow forecasts for the next three days
- The current snow cover of various rains in the northern hemisphere of NOAA Forecast over the expected snow worldwide. (Information is often a little too high!)
Less ice and snow means less cold air mass
Due to the reasons mentioned above, whether there is more ice and, above all, more snow on a hemisphere or not has an enormous impact. Should the snow cover be less due to climatic fluctuations, part of the cold air mass is practically “missing” as a counterpart to the moist, warm air near the equator. One of the effects of less snow and ice in the northern hemisphere is a frontal zone that is shifted to the north and separates air masses of polar and subtropical origin. Already in the nineties of the last century I was able to see a northward shifted frontal zone compared to mine in the eighties Thesis prove. The increasing heat waves in summer and less snowfall in winter in Central Europe in recent years are also a result of less ice and snow cover in the polar and arctic latitudes.
Webcam Baffin Island / Eastern Canada
Eastern Canada is notorious for its snowstorms that blow from Baffin Island let extremely cold air blow out over Labrador and Newfoundland into the Atlantic in winter. In addition to the Gulf Stream (or, more precisely, the North Atlantic Current), the cold air advances are largely responsible for the mild climate in Europe, as they induce extensive low-pressure areas which, especially in winter, often transport mild Atlantic air to Central Europe.
A little over 1.000 kilometers to the northwest is the Webcam Hall Beach, which already belongs to the mainland of Northeast Canada.