scostep 2010 (stp12) - Leibniz-Institut für Atmosphärenphysik an der ...
scostep 2010 (stp12) - Leibniz-Institut für Atmosphärenphysik an der ...
scostep 2010 (stp12) - Leibniz-Institut für Atmosphärenphysik an der ...
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STP12 Abstracts<br />
Berlin, 12 - 16 July <strong>2010</strong><br />
SCOSTEP Symposium <strong>2010</strong><br />
Same pattern of connection between space-time variations of precipitation <strong>an</strong>d<br />
geomagnetic activity<br />
Kovalenko Vladimir , Zherebtsov Gely , Rubtsova Olga , Molodykh Sergey<br />
<strong>Institut</strong>e of Solar-Terrestrial Physics SD RAS<br />
Authors proposed a physical mech<strong>an</strong>ism of solar activity effects on climatic characteristics<br />
<strong>an</strong>d the atmospheric circulation through the atmospheric electricity. A model of the solar<br />
activity effect on climatic characteristics of the Earth’s troposphere was elaborated on the<br />
basis of the mech<strong>an</strong>ism un<strong>der</strong> consi<strong>der</strong>ation. The model key concept is the heliogeophysical<br />
disturb<strong>an</strong>ce effect on the Earth climatic system’s parameters, which influence energy flux<br />
going from the Earth to space in high-latitude areas. Precipitation is a qu<strong>an</strong>titative <strong>an</strong>d the<br />
most sensitive indicator of the atmospheric circulation ch<strong>an</strong>ge.<br />
NCEP/NCAR Re<strong>an</strong>alysis, CMAP <strong>an</strong>d GPCP data were used to <strong>an</strong>alyze particularities <strong>an</strong>d<br />
regularities of long-term variations in amount of precipitation in 1950-2007. Global decrease<br />
in amount of precipitation was found to dominate till late 1990s. It started increasing only 10<br />
years ago. Peculiarities of distribution <strong>an</strong>d long-term variations in amount of precipitation in<br />
different latitudes <strong>an</strong>d longitudes were also consi<strong>der</strong>ed.<br />
Correlation <strong>an</strong>alysis of connection between the amount of precipitation <strong>an</strong>d the<br />
geomagnetic activity <strong>an</strong>d atmospheric circulation was carried out. Peculiarities of the spacetime<br />
distribution of correlation coefficients were studied. The connection was found out to<br />
depend on a season, <strong>an</strong>d is spatially no homogeneous. Cold periods in the northern hemisphere<br />
were characterized by a direct relationship between the geomagnetic activity <strong>an</strong>d amount of<br />
precipitation in high latitudes, whereas a negative relationship was observed in subequatorial<br />
latitudes. It was found the greatest sensitivity region of the precipitation to geomagnetic<br />
activity is the tropical North Pacific at all seasons. The intertropical convergence zone is<br />
intensified at the periods of the increased geomagnetic activity, at that the amount of<br />
precipitation rises in tropical North Pacific, but falls in tropical South Pacific.
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