what is the hottest temperature ever recorded in antarctica
Climate of Antarctica The highest temperature ever recorded on the Antarctic continent was 17.5 °C (63.5 °F) at Esperanza Base, on the Antarctic Peninsula, on 24 March 2015.[11] A higher temperature of 19.8 °C (67.6 °F) at Signy Research Station on 30 January 1982 is the record for the Antarctic region encompassing all land and ice south of 60S.[12]
Climate of Antarctica On the coast Antarctic average temperatures are around -10°c (in the warmest parts of Antarctica) and in the elevated inland they average about -55°C in Vostok.[7][8][9]
Geographical zone On the basis of latitudinal extent, the globe is divided into three broad heat zones.
Earth Earth's biosphere has significantly altered its atmosphere. Oxygenic photosynthesis evolved 7000270000000000000♠2.7 Gya, forming the primarily nitrogen–oxygen atmosphere of today.[71] This change enabled the proliferation of aerobic organisms and, indirectly, the formation of the ozone layer due to the subsequent conversion of atmospheric O2 into O3. The ozone layer blocks ultraviolet solar radiation, permitting life on land.[145] Other atmospheric functions important to life include transporting water vapor, providing useful gases, causing small meteors to burn up before they strike the surface, and moderating temperature.[146] This last phenomenon is known as the greenhouse effect: trace molecules within the atmosphere serve to capture thermal energy emitted from the ground, thereby raising the average temperature. Water vapor, carbon dioxide, methane, nitrous oxide, and ozone are the primary greenhouse gases in the atmosphere. Without this heat-retention effect, the average surface temperature would be −18 °C, in contrast to the current +15 °C,[147] and life on Earth probably would not exist in its current form.[148] In May 2017, glints of light, seen as twinkling from an orbiting satellite a million miles away, were found to be reflected light from ice crystals in the atmosphere.[149][150]