Antarctic Peninsula - Climate

Climate

Further information: Climate of Antarctica

Because the Antarctic Peninsula, which reaches north of the Antarctic Circle, is the most northerly part of Antarctica, it has the mildest climates within this continent. Its temperature are warmest in January, averages 1 to 2°C, and coldest in June, averages from -15°C to - 20°C. Its west coast from the tip of the Antarctic Peninsula south to 68 degrees South, which has a maritime Antarctic climate, is the mildest part of Antarctica Peninsula. Within this part of the Antarctic Peninsula, temperatures exceed 0°C for 3-4 months during the summer, and rarely fall below -10°C during the winter. Farther south along the west coast and the northeast coast of the peninsula, mean monthly temperatures exceeding 0°C for only 1-2 months of summer and average around -15°C in winter. The coast of the Antarctic Peninsula south of 63°S is generally much colder with mean temperatures exceeding 0°C for only 0-1 months of summer and winter mean temperatures ranging from –5 to –25°C. The colder temperatures of the southeast, Weddell Sea side, of the Antarctica Peninsula are reflected in the persistence of ice shelves that cling to the eastern side.

Precipitation varies greatly within the Antarctic Peninsula. From the tip of the Antarctic Peninsula south to 68 degrees South, precipitation averages 35-50 cm per year. a good portion of this rain falls as rain during the summer, on two-thirds of the days of the year, and with little seasonal variation in amounts. Between about 68°S and 63°S on the west coast of the Antarctica Peninsula and along its northeast coast, precipitation is 35 cm or less with occasional rain. Along the east coast of the Antarctic Peninsula south of 63°S, precipitation ranges from 10-15 cm. In comparison, the subantarctic islands have precipitation of 1-2 m per year and the dry interior of Antarctica is a virtual desert with only 10 cm precipitation per year.

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