Coldest Northern Hemisphere temperature officially confirmed

Coldest Northern Hemisphere temperature, first recorded by UW-Madison, officially confirmed
The coldest temperature in the Northern Hemisphere was recorded in Greenland in 1991. That temperature, first documented by the UW–Madison Antarctic Meteorological Research Center, was just confirmed by the World Meteorological Organization. Credit: NASA

Nearly 30 years after recording a temperature of minus 93.2 degrees Fahrenheit (minus 69.6 Celsius) in Greenland, the measurement has been verified by the World Meteorological Organization as the coldest recorded temperature in the Northern Hemisphere.


The measurement was first recorded by a University of Wisconsin-Madison Antarctic Meteorological Research Center Automatic Weather Station in December 1991. An AWS is a standalone instrument suite developed by UW-Madison Space Science and Engineering Center and AMRC scientists and engineers to collect numerous environmental parameters such as air temperature, pressure, humidity, wind direction and speed. The information is then relayed via satellite back to SSEC in near real time.

Over time, these data have come to provide a benchmark for

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Southern hemisphere could see up to 30% less rain at end of the century

Southern hemisphere could see up to 30% less rain at end of the century
Analysis is based on climate models for the mid-Pliocene period, which occurred 3 million years ago and shared characteristics with present-day warming. Credit: Gabriel Marques Pontes / USP

Projections based on climate models for the mid-Pliocene Warm Period (about 3 million years ago) suggest that countries in the tropical and subtropical southern hemisphere, including Brazil, may face longer droughts in the future. Annual rainfall may decrease as much as 30% compared with current levels.


One of the main variables considered in this scenario is a rise of 3 °C in the global average temperature, which may happen between 2050 and the end of the century unless the effects of climate change are mitigated.

The mid-Pliocene, before the emergence of Homo sapiens, shares characteristics with modern warming because temperatures were then between 2 °C and 3 °C higher than in the pre-industrial age (around the 1850s). High-latitude sea surface temperatures rose

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Hints of fresh ice in northern hemisphere

Infrared eyes on Enceladus: Hints of fresh ice in northern hemisphere
In these detailed infrared images of Saturn’s icy moon Enceladus, reddish areas indicate fresh ice that has been deposited on the surface. Credit: NASA/JPL-Caltech/University of Arizona/LPG/CNRS/University of Nantes/Space Science Institute

Scientists used data gathered by NASA’s Cassini spacecraft during 13 years of exploring the Saturn system to make detailed images of the icy moon—and to reveal geologic activity.


New composite images made from NASA’s Cassini spacecraft are the most detailed global infrared views ever produced of Saturn’s moon Enceladus. And data used to build those images provides strong evidence that the northern hemisphere of the moon has been resurfaced with ice from its interior.

Cassini’s Visible and Infrared Mapping Spectrometer (VIMS) collected light reflected off Saturn, its rings and its ten major icy moons—light that is visible to humans as well as infrared light. VIMS then separated the light into its various wavelengths, information that tells scientists more about the

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