seminar today

[Adrian Tompkins]

Reminder today at 3pm

Environmental meteorology series

https://www.ictp.it/research/esp/seminar-series.aspx 
<https://www.ictp.it/research/esp/seminar-series.aspx>

*Ioana Colfescu *
/National Centre for Atmospheric Science (NCAS) and University of Leeds/

*"The role of atmospheric weather noise in forcing the Atlantic 
Multidecadal Variability"*

_*Abstract*_

The Atlantic Multidecadal Variability (AMV) modulates various climate 
features worldwide with enormous societal and economic implications, 
including variations in hurricane activity in the Atlantic, sea-level 
changes, West African and Indian monsoon rainfall, European climate, and 
hemispheric- scale surface temperature. Leading hypotheses regarding the 
nature and origin of AMV focus primarily on its links with oceanic and 
coupled ocean-atmosphere internal variability, and on its response to 
external forcing. The role of another possible process, that of 
atmospheric noise forcing of the ocean, has received less attention. 
This workis addressed here by means of historical coupled simulations 
and diagnostic experiments, which isolate the influences of external and 
atmospheric noise forcings. Our findings show that external forcing is 
an important driver of the simulated AMV. They also demonstrate that 
weather noise is key in driving the simulated internal AMV in the 
southern part of the (0°-60°N) AMV region, and that weather noise 
forcing is responsible for up to 10%-20% of the multidecadal internal 
SST variability in some isolated areas of the sub-polar gyre region. 
Ocean dynamics independent from the weather noise forcing is found to be 
the dominant cause of multidecadal SST in the northern part of the AMV 
region.


Please register 
at:*https://zoom.us/meeting/register/tJ0lcuyurDMrEtbfP9f16GRLzqF1AiT7PHN7 
<https://zoom.us/meeting/register/tJ0lcuyurDMrEtbfP9f16GRLzqF1AiT7PHN7> *

to obtain login information.


This series of lectures is a new joint initiative between the Earth 
System Physics group at ICTP and the Atmospherics Physics group at the 
University of Trento.
Please find more information at: 
https://www.ictp.it/research/esp/seminar-series.aspx 
<https://www.ictp.it/research/esp/seminar-series.aspx>


-- 
Adrian Tompkins          | Earth System Physics
+39 040 2240579 (office) | ICTP
+39 040 22407579 (fax)   | Strada Costiera 11
www.ictp.it/~tompkins    | 34151 Trieste, Italy