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SEMINAR: AOML Seminar -TODAY - 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?"

From: Aoml.Receptionist <aoml.receptionist@noaa.gov>
Subject: SEMINAR: AOML Seminar -TODAY - 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?"
Date: Wed, 19 Sep 2012 10:07:21 -0400

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.