Antarctic sea ice is susceptible to global climate change is weaker than the Arctic, as more dependent on the intensity of the wind, rather than from rising temperatures, according to the National Information Center on snow and ice (NSIDC) USA.
Melting sea ice in the Antarctic depends on westerly winds that circulate over southern oceans, scientists believe. In recent years, their intensity due to global climate change has increased, which has led to the melting of ice in some areas, but the overall condition of the sea ice in the Antarctic is stable.
"On average, the area of sea ice around Antarctica is even growing … Strong melting of ice in some areas — for example, in the Amundsen and Bellingshausen Seas — offset the general trend: every 10 years, the average area of ice in the southern hemisphere is increased by 1% in the winter and 3 % in the summer "- speech, visit NSIDC scientist Ted Skambosa (Ted Scambos).
According to the scientist, the effects of global climate change manifest differently in the northern and southern hemispheres. If the Arctic ice cap is directly dependent on the temperature and atmospheric circulation, the sea ice in the Antarctic can "respond" and even the oceanic processes in the lower latitudes, such as El Niño.
El Nino, Spanish "kid" or "boy", — climatic anomaly in the equatorial Pacific, where the abnormally warm surface water moves along the equator to the American continent. Cold "contrast" El Nino is called La Nina ("little one" or "girl"). These phenomena, also called Southern Oscillation, periodically replace each other, with significant impact on the climate.
However, according to research by scientists from Germany and the U.S., published in the journal Science, in the last glacial period (about 19,000 years ago), the Arctic and Antarctic "sync": their ice shelves around the same time reached a maximum size and then simultaneously began melt. Previously it was thought that the southern continent climatically isolated from the rest of the world.