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The trees grow to a height of 15–25 m (49–82 ft). The characteristic bark is smooth, powdery and greenish yellow, although new twigs are purple, flaking later to reveal the characteristic yellow. [4] It is one of the few trees where photosynthesis takes place in the bark. Straight, white spines grow from the branch nodes in pairs.
Drunken trees, tilted trees, or a drunken forest, is a stand of trees rotated from their normal vertical alignment. [ 1 ] [ 2 ] This commonly occurs in northern subarctic taiga forests of black spruce ( Picea mariana ) under which discontinuous permafrost or ice wedges have melted, [ 3 ] [ 4 ] causing trees to tilt at various angles.
Oecanthus fultoni's common name of the thermometer cricket is derived from a relationship between the rate of its chirps and the temperature. An estimate of the temperature in Fahrenheit can be made by adding 40 to the number of chirps made in 15 seconds. [3] Before 1960, the name Oecanthus niveus was wrongly applied to this species. [4]
The tree line follows the line where the seasonal mean temperature is approximately 6 °C or 43 °F. [12] [6] The seasonal mean temperature is taken over all days whose mean temperature is above 0.9 °C (33.6 °F). A growing season of 94 days above that temperature is required for tree growth. [13]
The Alerce Milenario Tree is located in a ravine, in the Alerce Coster National Park. The park is 137 hectares (340 acres), and up to 1,048 m (3,438 ft) above sea level. It has a rainy temperate climate with rains all year round. Its average temperature is 12°C (53°F). The park receives about 10,000 visitors a year who visit the tree.
In Kvikkjokk-Årrenjarka in Swedish Lapland, the mercury dropped to minus 43.6 C (minus 46.5 F), the lowest January tempe Extreme cold grips Nordic countries, Russia as floods hit western Europe ...
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The seeds fall from the tree in autumn, where they must be exposed to 45 days of temperatures below 4 °C (39 °F) to break their coating down. Germination of A. saccharum is slow, not taking place until the following spring when the soil has warmed and all frost danger is past.