Record value in Antarctica: 15.4 degrees in June measured at Esperanza Base

Given the comparatively high temperatures for the season, ice in Antarctica is currently melting faster than usual, according to experts. Researchers have observed an acceleration of ice loss for years, particularly at the edges of the Antarctic ice sheet and on the shelf ice areas off the coast. The June value is part of a series of unusual measurements.

What the measurement means

According to the information, unusually high temperatures have also been measured at other research stations since the beginning of the month. The record is therefore not an isolated case, but part of a broader pattern that weather services are currently documenting. The Argentine weather agency published the data; the AFP agency distributed the report internationally.

Esperanza Base is located at the tip of the Trinity Peninsula and is one of the northernmost permanently operated research stations on the continent. It is maintained by the Argentine military and the country's scientific program. Due to its location at the edge of Antarctica, it reacts more sensitively to warm air incursions from temperate latitudes than stations further inland.

Scientists place such individual events in the context of long-term climate development. Even if a single daily value does not yet prove a turning point, forecasts for sea level rise are based on the observation that Antarctic ice is overall losing mass. If ice melts faster than usual, global sea levels will rise in the long term.

Context within the climate framework

The consequences of accelerated melting do not only affect the polar region. Glaciologists point out that the quantities of fresh water stored in Antarctic ice influence the global water cycle and sea levels in coastal cities. Changes in surface temperatures are also considered an indicator of shifts in the oceanic current system.

The previous June record value for Antarctica dates from 1998. Back then, 13.3 degrees was measured. The fact that this value has now been exceeded by more than two degrees is considered remarkable by climate researchers. They also emphasize that long-term measurement series are needed for robust conclusions and that a single day does not replace a trend.

The Argentine weather agency announced that the data would be cross-checked with international partners, including the National Snow and Ice Data Center and the British Antarctic Survey. Esperanza is one of several stations that regularly provide data to global climate research. The record value will thus feed into ongoing analyses being carried out by researchers worldwide.

June marks the beginning of the Antarctic winter. The fact that a temperature record is being set precisely in this season underscores, in the view of experts, the urgency of further measurements. According to the agency, Esperanza remains continuously staffed, so that the data series will continue in the coming months.