Department of Fisheries Oceanography Weekly Seminar by Alex Kinsella
When: Wednesday,
November 16, 2022
2:30 PM
-
3:30 PM
Where: > See description for location
Description: The School for Marine Science and Technology
Department of Fisheries Oceanography
Seminar Announcement
“The Relationship Between SST Gradients and Rainfall within Monsoon Intraseasonal Oscillations”
Alex Kinsella
Mahadevan Lab
Woods Hole Oceanographic Institution
Wednesday, November 16, 2022
2:30 pm – 3:30 pm
SMAST East, Rooms 101/102
And via Zoom
Abstract
The South Asian monsoon is the largest weather system in the world and involves intense air-sea interaction over the tropical Indian Ocean. The summer monsoon season exhibits wet and dry spells on the 30-90 day timescale termed monsoon intraseasonal oscillations (MISO), which take the prototypical form of northward-propagating bands of rainfall over the Bay of Bengal. Ocean and atmosphere oscillations are tightly coupled within MISO events due to large heat, momentum, and radiative fluxes at the surface. In this talk, I will discuss the relation between the oscillations in Bay of Bengal meridional SST gradients and in rainfall over the northern Bay and continent. The coupling between SST gradients and rainfall is stronger during dry spells than during wet spells, possibly due to a convective threshold mechanism. The gradients are also connected to the behavior of the eastward extension of the low-level Somali atmospheric jet, which oscillates in tandem with MISO events and brings moist air and rainfall over India when in its northward position.
Bio
Alex Kinsella is a postdoctoral investigator at Woods Hole Oceanographic Institution in the Mahadevan Lab. He is interested in air-sea interaction from the submesoscale to the basin scale and its effects on weather and climate. Alex transitioned to physical oceanography after he completed his PhD in physics in 2021 at UC Santa Barbara, where his dissertation work focused on string theory and geometry.
********************************************************************************
Zoom Link
https://umassd.zoom.us/j/93758230260?pwd=OHJ5UDloQkZZaCtXcTlBNlR6Qm0rQT09
Meeting ID: 937 5823 0260
Passcode: 426839
One tap mobile
+13017158592,,93758230260#,,,,*426839# US (Washington DC)
+13126266799,,93758230260#,,,,*426839# US (Chicago)
Dial by your location
+1 301 715 8592 US (Washington DC)
+1 312 626 6799 US (Chicago)
+1 646 876 9923 US (New York)
+1 253 215 8782 US (Tacoma)
+1 346 248 7799 US (Houston)
+1 669 900 6833 US (San Jose)
Find your local number: https://umassd.zoom.us/u/acosTPRs4V
**************************************************************
For additional information, please contact Sue Silva at s1silva@umassd.edu
Department of Fisheries Oceanography
Seminar Announcement
“The Relationship Between SST Gradients and Rainfall within Monsoon Intraseasonal Oscillations”
Alex Kinsella
Mahadevan Lab
Woods Hole Oceanographic Institution
Wednesday, November 16, 2022
2:30 pm – 3:30 pm
SMAST East, Rooms 101/102
And via Zoom
Abstract
The South Asian monsoon is the largest weather system in the world and involves intense air-sea interaction over the tropical Indian Ocean. The summer monsoon season exhibits wet and dry spells on the 30-90 day timescale termed monsoon intraseasonal oscillations (MISO), which take the prototypical form of northward-propagating bands of rainfall over the Bay of Bengal. Ocean and atmosphere oscillations are tightly coupled within MISO events due to large heat, momentum, and radiative fluxes at the surface. In this talk, I will discuss the relation between the oscillations in Bay of Bengal meridional SST gradients and in rainfall over the northern Bay and continent. The coupling between SST gradients and rainfall is stronger during dry spells than during wet spells, possibly due to a convective threshold mechanism. The gradients are also connected to the behavior of the eastward extension of the low-level Somali atmospheric jet, which oscillates in tandem with MISO events and brings moist air and rainfall over India when in its northward position.
Bio
Alex Kinsella is a postdoctoral investigator at Woods Hole Oceanographic Institution in the Mahadevan Lab. He is interested in air-sea interaction from the submesoscale to the basin scale and its effects on weather and climate. Alex transitioned to physical oceanography after he completed his PhD in physics in 2021 at UC Santa Barbara, where his dissertation work focused on string theory and geometry.
********************************************************************************
Zoom Link
https://umassd.zoom.us/j/93758230260?pwd=OHJ5UDloQkZZaCtXcTlBNlR6Qm0rQT09
Meeting ID: 937 5823 0260
Passcode: 426839
One tap mobile
+13017158592,,93758230260#,,,,*426839# US (Washington DC)
+13126266799,,93758230260#,,,,*426839# US (Chicago)
Dial by your location
+1 301 715 8592 US (Washington DC)
+1 312 626 6799 US (Chicago)
+1 646 876 9923 US (New York)
+1 253 215 8782 US (Tacoma)
+1 346 248 7799 US (Houston)
+1 669 900 6833 US (San Jose)
Find your local number: https://umassd.zoom.us/u/acosTPRs4V
**************************************************************
For additional information, please contact Sue Silva at s1silva@umassd.edu
Contact: > See Description for contact information
Topical Areas: School for Marine Sciences and Technology, SMAST Seminar Series