Why we know global warming is occurring (observations)
Dr. Claudio Piani, Ph.D.
The American University of Paris
Abstract: Atmospheric concentrations of greenhouse gasses have been increasing steadily since observations began. Manifestations of the induced climate change are ubiquitous. Glaciers, permafrost and Arctic sea ice decreasing. The same can be said of the Greenland and Antarctic ice sheets. Heat waves are becoming more intense and frequent while cold days are becoming rarer. Rain patterns are changing as well with droughts becoming more frequent in some place and intense precipitation events in others. Arguably the locus where the Earths altered radiative budget has had the greatest effect is the ocean. The top 700 meters of the ocean has absorbed most of the added heating due to anthropogenic greenhouse gasses. The results are not only evident by direct measurements of temperature, but are also manifested through sea level raise, fish stock migration and coral bleaching. This talk intends to be an informative and, unfortunately, depressing review of all observable manifesta tions of climate change along with a few myths (see figure).
Figure: This is a picture of a river of meltwater flowing across an ice sheet. It is a natural phenomena occurring mostly in the summer. This picture was figured on “sea-climate.blogspot.com” with the comment “Ice Melting Fast Global Warming Potential Sea Level Rise of 70 Metres”.