Mar. 10, 2013 An international team of 21 authors from 17
institutions in seven countries has just published a study in
the journal Natural Climate Change showing that, as the cover of
snow and ice in the northern latitudes has diminished in recent
years, the temperature over the northern land mass has increased
at different rates during the four seasons, causing a reduction
in temperature and vegetation seasonality in this area. In other
words, the temperature and vegetation at northern latitudes
increasingly resembles those found several degrees of latitude
farther south as recently as 30 years ago. The NASA-funded
study, based on newly improved ground and satellite data sets,
examines critically the relationship between changes in
temperature and vegetation productivity in northern latitudes.
On the amplified greenhouse effect, Prof. Ranga Myneni,
Department of Earth and Environment, Boston University and lead
co-author says "A greenhouse effect initiated by increased
atmospheric concentration of heat-trap