SEMINAR: AOML Seminar - Sept. 27, 2012 - 10:30 a.m.- Ana Juracic - “The Moist Entropy Change in Tropical Cyclones”

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

 AOML Seminar

Date:         Thursday, Sept. 27, 2012

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

Location:   AOML First floor Conference Room

 

Speaker:    Ana Juracic

 New Mexico Tech University

Title:         “The Moist Entropy Change in   
Tropical Cyclones”

 ABSTRACT:   Important part of moist entropy budget is the advection of

moist entropy in or out of the system, due to interaction of wind and

moist entropy fields. The dropwindsonde data from several tropical

storms is used to calculate both of those fields, as well as the

resulting flow. In order to determine if the storm is exporting or

importing moist entropy, the advection is horizontally averaged and

vertically integrated. The storms of interest were Alex, Karl, Gaston

and Fanapi from 2010. First three occurred in Atlantic basin while

Fanapi evolved over Pacific basin. Data for Alex and Karl were

provided by NOAA's Hurricane Research Division. Gaston and Fanapi data

are from Predict and ITOP projects respectively. Gaston is the only

one that was not developing during dropsonde missions, so it can be

used as some kind of indicator of non-developing features in the

entropy flux. The data show that during the development of the storm,

the values of the moist entropy export are lower than for

non-developing systems. One of the reasons for that can be in reduced

import of moist entropy at lower levels of non-developing systems.