Count-a-thon of airplane contrails
Article first published online: 3 JUN 2011
©2005. American Geophysical Union. All Rights Reserved.
Eos, Transactions American Geophysical Union
Volume 86, Issue 41, page 382, 11 October 2005
How to Cite
2005), Count-a-thon of airplane contrails, Eos Trans. AGU, 86(41), 382–382, doi:10.1029/2005EO410004., and (
- Issue published online: 3 JUN 2011
- Article first published online: 3 JUN 2011
The third Contrail Count-a-Thon of the GLOBE (Global Learning and Observations to Benefit the Environment) project is being held during Earth Science Week 2005 in October. Reports of sky observations—including those of contrail-free skies—taken between 11:00 A.M. and 1:00 P.M. local time on 13 October 2005 are welcome from any interested observers (including Eos readers), whether or not they are associated with local schools, clubs, parks, or other groups. The Web site with instructions and the report form is available at http://www.globe.gov/earthsciweek2005.
Clouds remain one of the main sources of uncertainty in efforts to understand and predict the Earth's global climate [Cess et al., 1990]. Although satellite instruments and techniques to study clouds continue to improve, contrails are a cloud type of significant interest that remains a challenge to study.