An international research campaign involving over 100 scientists from 12 countries has begun investigating the dramatic warming in the Arctic — at an estimated rise of two to three degrees Celsius, or about 3.5 to 5.5 degrees Fahrenheit — over the last 50 years.
The campaign, named HALO-(AC)3, is a joint research project by leading research institutes in Germany and abroad. The name “HALO” references the High-Altitude Long-Range research aircraft utilized by the campaign.
