The National Oceanic and Atmospheric Administration (NOAA) has been carrying out flights over the Arctic Ocean researching why the polar ice cap is melting faster than predicted earlier. The aircraft being used, an WP-3D Orion aircraft is similar to those used for hurricane hunting, and carries some 30 instruments to probe the atmosphere above the Arctic Ocean.
It is alleged that industry, transportation, and biomass burning in North America, Europe, and Asia are emitting trace gases and tiny airborne particles that are polluting the polar region, forming an “Arctic Haze” every winter and spring. Scientists suspect these pollutants are speeding up the polar melt. Scientists feel that analysis of the data collected will enable them to create a high definition view of the atmosphere as the springtime sunlight warms the atmosphere and starts a chain reaction of chemicals which creates the winter and summer "Arctic Haze". NOAA is a division of the Department of Commerce tasked with investigating the atmosphere surrounding the earth. Until next time keep your wings straight and level Hersch! JetAviator7 At that time  the chief engineer was almost always the chief test pilot as well. That had the fortunate result of eliminating poor engineering early in aviation.
— Igor Sikorsky, reported in 'AOPA Pilot' magazine February 2003.