CFSv2 Northern Hemisphere Atmospheric Blocking


(Updated: Tue Dec 12 22:02:38 UTC 2017)

The hovmoller plots shown below are the blocking strength from observation (CFSr) and 16 members ensembles of CFSv2 45-day forcast daily 500 hPa height. All colored regions in the plot show regions where the flow is blocked according to the blocking index from Tibaldi and Molteni (1990). The blocking strength is defined as the southern 500 hPa geopotential height gradient with unit of [m/(deg of latitude)] (denoted as GHGS in blocking index definition). The blocking index calculation in detail can be found in this page.

Forecast
Verification
Archives
Blocking Frequency
Year2012
Year2013
Year2014
Year2015
Year2016
Year2017

Seasonal Mean Forecast

Monthly Mean Forecast

Weekly Mean Forecast

Hindcast Diagnoses

Send your comments to: Mingyue Chen