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El Niño influences the formation of low pressure systems over the Gulf Stream

Analysis of cyclone tracks and precyclogenesis flow conditions show us that El Niño can shift the preferred cyclogenesis position over the Gulf Stream which influences the cyclone’s track across the North Atlantic. The results are published in the Journal of the Atmospheric Sciences.

 The first wave of January 2010 El Nino storms.
The first wave of January 2010 El Nino storms. The 1st, 2nd, 3rd storm, and and upper-level low can all be seen in this satellite photo.
Photo:
United States Naval Research Laboratory, Monterey via Wikimedia Commons

A recent study published in the Journal of the Atmospheric Sciences, by Sebastian Schemm, Laura Ciasto, Camille Li and Nils Gunnar Kvamstø reveals how ENSO affects the formation of low pressure systems over the Gulf Stream area and consequently their tracks across the North Atlantic.  The results are based on the analysis of the wintertime precyclogenesis flow across North America during three ENSO variants in an observation-constrained reanalysis dataset.

Read more on Bjerknes Centre for Climate Research's web pages.