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.
The Earth Scientist, Volume XXVII, Issue 1, Winter 2008

$10.00
Articles in the Winter 2008 issue of The Earth Scientist include:
- Antarctica in High Definition, by Robert Bindschadler, Brian Campbell and Paul Przyborski
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Polar Explorations in the Classroom via Windows
to the Universe, by Lisa Gardiner, Roberta Johnson, Randy Russell, Teri Eastburn,
Jennifer Bergman, Marina LaGrave, and Julia Genyuk - Circumpolar Permafrost Monitoring Program, by Kenji Yoshikawa
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The Ship Creek Ice Mystery, an ArctiQuest
Research Expedition, by Richard Shope -
Frozen in Time: Many Choices for How to
Teach Climate Change, by Lynne Cherry, Carol Malnor and Gary Braasch
Price: $10.00
