(02/18/2007) Researchers say they have found links
between seasonal temperature changes and the uptake and loss of carbon dioxide.
Not exact matches
Seasonal exchanges are huge: about 20 % of all CO2 in the atmosphere is exchanged
between atmosphere and other reservoirs over the seasons, but as the exchanges with oceans and vegetation are countercurrent with
temperature (vegetation in the NH dominates), the net result is only some 2 %
change in the atmosphere over the seasons which is visible in the Mauna Loa curve.
The
seasonal climate may relate to
changes in the ocean circulation pattern prior to 4.6 Ma that resulted in an increased
temperature and atmospheric pressure gradient
between the east coast of North America and the Atlantic Ocean, but this climate phase seems to be only a temporary condition, as underlying and overlying sediment are both consistent with drier conditions.
PRUDENCE RCM outputs showed non-linear relationships
between mean maximum
temperature and indices of drought and heatwave (Good et al., 2006), while
changes in maximum 1 - day and 5 - day precipitation amounts were systematically enhanced relative to
changes in
seasonal mean precipitation across many regions of Europe (Beniston et al., 2007).
Given the intimate connection
between river water and widespread alluvial aquifers it is clear that there must be stong
seasonal change in «shallow groundwater»
temperature many metres below the surface.