Category Archives: Atmosphere

May 2012 Second Warmest on Record

After the fifth warmest April on record, the combined global land and ocean temperature for May 2012 was 0.66°C (1.19°F) above the 20thcentury average of 14.8°C (58.6°F), making it the 2nd warmest May on record (since 1880), only behind May 2010. Continue reading

Category: Atmosphere
Tags: ,
1 Comment

Inaugural EarthNow Entry: Ozone Hole Maximum

While those of us in the Northern Hemisphere are settling into Autumn, increased sunshine is making a rebound in the Southern Hemisphere. This may sound pleasant, but the increased sunshine along with other factors is what leads to the “ozone hole” many of us have heard of over the Antarctic. During the cold dark winters, temperatures drop below -78ºC, promoting the production of of chemically active chlorine and bromine. When sunlight is combined with the chlorine and bromine in the Antarctic Spring, there is an activation that leads to a rapid ozone loss, resulting in the Antarctic ozone hole (holes are areas with ozone concentrations of less than 220 Dobson Units). Feel free to use the information and data sets below to enhance your SOS presentation. Continue reading

Category: Atmosphere
Tags: , ,
0 Comments