By Michael Ricciardi •
September 27, 2009
The appeal of shortwave, geoengineering is in it’s purportedly rapid, remediation impact (although no global experiments have been conducted yet). However, the combined climate impact of GHG increases with a geoengineered reduction in shortwave radiation is not known, but, it is feared, could result in environmental “winners” and “losers”–meaning some regions of the planet could experience severe drought, and even increased conflict over water resources.
By Michael Ricciardi •
August 11, 2009
In a recent interview with W. Dean Pesnell of Goddard Space Flight Center, I posed many questions concerning current solar activity as well as some sensationalized, catastrophic news items as of late. Below are my questions and Dr. Pesnell’s responses.
Nature is not entirely defenseless against rising greenhouse gas (GHG) emissions. A class of elements called halogens (fluorine, chlorine, bromine, iodine, etc., often occurring in pairs) are emitted into the atmosphere via ocean spray, where they destroy ozone (O3), a significant greenhouse gas and aerosol that promotes warming.
According to the journal Nature Geosciences, “increasing concentrations of black carbon have substantially contributed to rapid Arctic warming during the past three decades.”
A paper from that journal, “Climate response to regional radiative forcing during the twentieth century,” was authored by climate researchers Drew Shindell, at the NASA Goddard Institute for Space Studies, and Greg Faluvegi of Columbia University. Shindell, Faluvegi, and many other climate scientists believe that limiting black carbon sources may “buy the world some time” in the race to control climate change as richer nations develop their climate change policies and begin taking the slow steps towards overhauling their carbon heavy energy sources.
The researchers assert that aerosols are responsible for “half or more” of Arctic warming. Unexpectedly, their paper’s claims and recommendations sparked a flurry of critical emails, perhaps due to confusion over the atmospheric roles of different aerosols.
By Sarah Lozanova •
October 27, 2008
By turning a long line of mirrors, the first solar thermal plant in nearly two decades was launched last week in Bakersfield, California. Unlike solar photovoltaic systems that convert sunlight into electricity, this plant will focus sunlight on tubes that contains water. The light heats the water, creating steam, thus turning turbines.
