Recent Posts

Planes can trigger small localized snowstorms
Posted on 25 Jul 2010 by Thomas H. Clarke, Jr.

There has been a debate over the years re whether aircraft flying through clouds can trigger changes in the local weather. Researchers have now identified the circumstances when such may happen. Water typically freezes at 32ºF or 0ºC. But... Read More

Study concludes forests are decreasing, but how good is the data?
Posted on 28 Jun 2010 by Thomas H. Clarke, Jr.

Using data from 541 randomly selected 18.5 by 18.5 km blocks, an analysis of Landsat-7 satellite data has concluded that 3% of the forests (1 million square kilometer) present in 2000 were gone by 2005. See map at http://www.sciencenews.org/view/download... Read More

Rivers are discovered in the atmosphere, and they can convey a lot of water
Posted on 24 Mar 2011 by Thomas H. Clarke, Jr.

As I look out the window and once again view the downpours that have impacted California for months, it seems appropriate to describe one of the more interesting discoveries of the last decade, rivers in the atmosphere. Think of it as the "Pineapple... Read More

Ninth Circuit rules that owners of storm water systems (e.g., cities, counties, districts) are liable for discharges of polluted stormwater into rivers and ocean
Posted on 11 Mar 2011 by Thomas H. Clarke, Jr.

It is well known that stormwater gathers a variety of pollutants as it flows across the landscape and even through stormwater drainage systems. See, for example, http://cfpub.epa.gov/npdes/home.cfm?program_id=6 and http://www.epa.gov/owow_keep/NPS/index... Read More