Gulf of Corcovado
Grande Chiloè Island
Cuernos del Paine from Pehoé Lake, Chile.
The Chilean part of Patagonia embraces the southern part of the region of Los Lagos, and the regions of Aisén and Magallanes.
The climate is less severe than was supposed by early travelers.
The east slope is warmer than the west, especially in summer, as a branch of the southern equatorial current reaches its shores, whereas the west coast is washed by a cold current.
At Puerto Montt, on the inlet behind Chiloé Island.
The mean annual temperature is 11 °C (52 °F) and the average extremes 25.5 °C (78 °F) and −1.5 °C (29.5 °F), whereas at Bahía Blanca near the Atlantic coast and just outside the northern confines of Patagonia the annual temperature is 15 °C (59 °F) and the range much greater.
At Punta Arenas, in the extreme south, the mean temperature is 6 °C (43 °F) and the average extremes 24.5 °C (76 °F) and −2 °C (28 °F).
The prevailing winds are westerly, and the westward slope has a much heavier precipitation than the eastern in a rainshadow effect;the western islands close to Torres del Paine receive an annual precipitation of 4,000 to 7,000 mm, whilst the eastern hills are less than 800 mm and the plains may be as low as 200 mm annual precipitation.
The depletion of the ozone layer over the South Pole has been reported as being responsible for blindness and skin cancer in sheep in Tierra del Fuego, and concerns for human health and ecosystems.
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