Physics
Scientific paper
Jul 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002georl..29m..16r&link_type=abstract
Geophysical Research Letters, Volume 29, Issue 13, pp. 16-1, CiteID 1638, DOI 10.1029/2002GL014663
Physics
14
Information Related To Geographic Region: Africa, Global Change: Climate Dynamics (3309), Meteorology And Atmospheric Dynamics: Ocean/Atmosphere Interactions (0312, 4504), Oceanography: Physical: El Nino
Scientific paper
Decadal to multidecadal `ENSO-like' SST and circulation patterns in joint EOFs of global SST and MSLP, may be linked to South African rainfall variability. For eastern/northern South Africa (summer rainfall), the average of the 9-13 year and 18-39 year bandpass filtered EOFs tracks the rainfall well for 1903-1998. Higher (lower) pressure, warmer (cooler) SST in the Pacific and Indian Oceans and offshore (onshore) winds characterise the positive (negative) EOF signal and decreased (increased) rain. For southwestern South Africa (winter rainfall), the average of the 13-18 and 18-39 year filtered EOFs tracks the rainfall well from 1903-1982 with the 9-13 year EOF working better from 1983-1998. The suggested mechanism involves shifts in the upper level jet and in the strength of the subtropical high pressure belt and circumpolar trough.
Reason Chris J. C.
Rouault Mathieu
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