A new record is recorded in Antarctica: the temperature for the first time exceeded + 20 ° С
Scientists first recorded temperatures in Antarctica exceeding 20 degrees Celsius. The record was recorded on February 9 by Brazilian scientists on the island of Simor near the northern tip of the mainland as part of a project launched 20 years ago to study the effect of climate warming on the planet on permafrost. According to them, it warmed up to 20.75 ° C, according to Detsche Welle with reference to AFP.
At the same time, Brazilian scientist Carlos Schaefer told reporters that the record high temperatures in Antarctica are not related to global warming. He called the measurement "data obtained at a particular moment and not part of a long-term study."
"We see a warming trend in many places that we are observing, but we have never seen anything like it," TASS quoted him as saying.
He noted that the temperature in this part of the continent behaves very strangely: in the first decade of the 21st century it dropped, but in the next it began to rise rapidly. Scientists believe that this is due to shifts in ocean currents and the influence of the El Niño climate phenomenon, which is a fluctuation in the temperature of the surface layer of water in the equatorial part of the Pacific Ocean. It occurs with a period of 3 to 8 years.
The new record has not yet been confirmed by the World Meteorological Organization (WMO). And scientists from Argentina doubt that this will happen. The Argentine year-round Antarctic station Marambio operates on Simor, the data from it are official. On that day, the highest air temperature was recorded at 16:00 and amounted to 15.5 ° C, reports Stormnews with reference to Clarín.
Argentine scholars say that it is necessary to check by what methods and in what place of the island their Brazilian colleagues received their data. They assume that the measurements did not meet accepted standards.
According to their information, the maximum on Simore this month was 15.8 ° C and was recorded on February 6. It is noted that the expected air temperature at this time of year is in the range +1 …- 4 ° C, and the current situation is a consequence of global warming.
While a record for the entire Antarctic region, i.e. beyond the Arctic Circle – below 60 ° south latitude, there remains an air temperature of 19.8 ° C on Signy Island in January 1982.
This month also recorded a record for continental Antarctica, and it has a much greater chance of becoming official. Data is currently under consideration by WMO.
On February 6, air temperature rose to 18.3 ° C at the Argentinean Antarctic base of Esperance in the far north of the Antarctic Peninsula. The previous maximum of 17.5 ° C (also in Esperance) belonged to March 24, 2015.
# Antártida | Nuevo récord de temperaturas 🌡️
Este mediodía la base #Esperanza registró un nuevo récord histórico (desde 1961) de temperatureura, con 18.3 ° C. Con este valor se supera el récord anterior de 17.5 ° C del 24 en marzo de 2015. Y no fue el ûnico récord … pic.twitter.com/rhKsPFytCb
– SMN Argentina (@SMN_Argentina) February 6, 2020
The World Meteorological Organization associates the temperature increase to such a value in Esperance with the phenomenon of foehn – a warm wind from a mountain. These properties of air are explained by its adiabatic heating during a downward movement over mountain slopes. When lowering for every 100 m, the air heats up by about 1 ° C. Going down from a height of 2500 m, it heats up by 25 degrees and becomes warm, even hot, according to the website of the Hydrometeorological Center of Russia.
WMO notes that the Antarctic Peninsula (the northwestern tip of the continent) is one of the fastest warming regions of the planet – almost 3 ° C over the past 50 years.
The amount of ice lost annually in Antarctica increased at least 6 times between 1979 and 2017. Most of its losses are due to melting ice shelves below due to relatively warm ocean water, especially in the west of Antarctica and to a lesser extent along the Antarctic Peninsula and in the eastern part of the continent.