Biogeochemistry and Climate Studies
Footprinting: A seasonal connection between the tropics and mid-latitudes
Article first published online: 7 DEC 2012
Copyright 2001 by the American Geophysical Union.
Geophysical Research Letters
Volume 28, Issue 20, pages 3923–3926, 15 October 2001
How to Cite
(2001), Footprinting: A seasonal connection between the tropics and mid-latitudes. Geophysical Research Letters, 28: 3923–3926. doi: 10.1029/2001GL013435
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Accepted: 14 JUL 2001
- Manuscript Received: 8 MAY 2001
A connection between the mid-latitude and tropical Pacific is identified in a coupled general circulation model (CGCM). The connection involves a seasonal coupling between winter mid-latitude atmospheric circulation anomalies, and summer equatorial wind stress anomalies. The seasonal coupling results from a “footprinting” mechanism, in which the summer tropical atmosphere responds to subtropical sea surface temperature (SST) anomalies that are generated by the mid-latitude atmospheric variability during the previous winter. Details of the connection, and of the footprinting mechanism are presented. Implications for interannual ENSO and decadal ENSO-like variability are discussed.