The missing teleconnection between the North Atlantic and the Sahel precipitation in  CFSv2 | Zendy

Barandiaran Daniel | Zendy; Wang ShihYu | Zendy

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The missing teleconnection between the North Atlantic and the Sahel precipitation in CFSv2

Author(s) -

Barandiaran Daniel,

Wang ShihYu

Publication year - 2013

Publication title -

atmospheric science letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.951

H-Index - 45

ISSN - 1530-261X

DOI - 10.1002/asl2.457

Subject(s) - teleconnection , climatology , rossby wave , precipitation , tropical atlantic , atlantic multidecadal oscillation , environmental science , geology , geography , el niño southern oscillation , north atlantic oscillation , meteorology , sea surface temperature

This study presents new findings on the link between interannual variabilities of atmospheric circulations over the North Atlantic and precipitation over the African Sahel ( P S ). Our analysis shows a meridionally stratified circulation wave train resembling the East Atlantic ( EA ) mode, apparently connected to P S through Rossby wave dispersion in the middle troposphere originating from the North Atlantic. However, the Climate Forecast System version 2 fails to depict the EA and its P S impact. Because the EA explains 29% of variance of P S , this portion of P S variability is either missing in the seasonal forecast, or being made up by an alternative process .

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