SEMINAR: AOML Seminar - Sept. 19, 2012 - 10:30 a.m - Dr. Sang-Ki Lee - “Is there an optimal ENSO pattern ,that enhances large-scale atmospheric ,processes conducive to tornado ,outbreaks in the U.S?"

[Aoml.Receptionist <aoml.receptionist@noaa.gov>]

AOML Seminar

 

DATE:              Wednesday, Sept. 19, 2012

TIME:              10:30 a.m. – refreshments at 10:15 a.m.

Location:    AOML First Floor

                        Conference Room

SPEAKER:     Dr. Sang-Ki Lee (PhOD)

TITLE:             “Is there an optimal ENSO  pattern 
that  enhances large-scale atmospheric 
processes conducive to tornado 
outbreaks in the U.S? "

Abstract: The record-breaking U.S. tornado outbreaks in the spring of

2011prompt the need to identify long-term climate signals that could

Potentially provide seasonal predictability for U.S. tornado outbreaks

This study uses both observations and model experiments to show that a

positive phase Trans-Niño may be one such climate signal. Among the

top ten extreme outbreak years during 1950-2010, seven years including

the top three are identified with a strongly positive phase 

Trans-Niño.

The number of intense tornadoes in April-May is nearly doubled during

the top ten positive Trans-Niño years from that during ten neutral years. 
Results from modeling experiments are consistent with the observed linkage 
between Trans-Niño and tornadic environmental conditions.