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Also actiniform. Describing a collection of low-lying, radially structured clouds with distinct shapes (resembling leaves or wheels in satellite imagery), and typically organized in extensive mesoscale fields over marine environments. They are closely related to and sometimes considered a variant of stratocumulus clouds. actinometer A scientific instrument used to measure the heating power of ...
instrumental temperature record Shows the fluctuations of the temperature of the atmosphere and the oceans as measured by temperature sensors. The longest-running quasi-global record starts in 1850. Interdecadal Pacific Oscillation (IPO) A cycle of 15 to 30 years between warm or cool waters in the north and south Pacific Ocean.
Here, h signifies low-latitude climates (average annual temperature above 18 °C (64.4 °F)) while k signifies middle-latitude climates (average annual temperature less than 18 °C). In addition, n is used to denote a climate characterized by frequent fog and H for high altitudes.
Alaska holds the all-time U.S. record. The mercury plummeted to 80 degrees below zero on Jan. 23, 1971, in Prospect Creek, north of Fairbanks.
Fortunately, this round of Arctic air is forecast to be brief: According to AccuWeather, the cold air is likely to ease by the weekend, with temperatures potentially rising above average by early ...
Temperature forecast map Nearly the entire U.S. is forecast to see above-average temperatures (in orange and red) during the week of Dec. 13-19, 2024, a marked contrast to the recent Arctic chill ...
Mercury, despite being close to the Sun, is actually cold during its night, with a temperature of about 93.15 K (−180 °C, −290 °F). Mercury is cold during its night because it has no atmosphere to trap in heat from the Sun. [31] Jupiter with a black-body temperature of 110.0 K (−163.2 °C, −261.67 °F). [32]
According to The Guardian, scientists have traced this top cold-weather myth to a United States Army manual from the 1970s recommending a hat in the cold because "40 to 45 percent of body heat" is ...