During the week of May 13th, the CO2 level at the Mauna Loa Observatory in Hawaii topped 400 ppm repeatedly. Daily levels of CO2 can vary due to weather, and there are seasonal trends as well.
Earth Scientist, Volume XXVIII, Issue 2, Summer 2012

$10.00
Articles in the Summer 2012 issue of The Earth Scientist include:
- Tornado Debris Balls, by James Vavrek, Jason Rybinski, Allen Pokracki and Brian Wilkes,
- Data Analysis: Tropical Storm and Hurricane Frequency, by Ben Wildeboer
- Measuring the Solar System in Our Own Backyard, by Brittnee Lydy and Brian Polk
- Stars in Their Eyes, Math on Their Minds, by Craig Beals and Jennifer Combs
- Teaching STEM with Web-Based GIS, by Joseph Kerski
The print version of this Summer TES issue contains, for your classroom, a full color poster from NOAA, "Ten signs of a Warming World".
Price: $10.00
