Department of Estuarine and Ocean Sciences Seminar Announcement - Dr. Zhitao Yu
When: Wednesday,
April 5, 2023
12:30 PM
-
1:30 PM
Where: > See description for location
Description: The School for Marine Science and Technology
Department of Estuarine and Ocean Sciences
Seminar Announcement
“What is the generation mechanism of the counter-wind South China Sea Warm Current in winter”
Dr. Zhitao Yu
NRL Stennis
Wednesday, April 5, 2023
12:30 pm – 1:30 pm
SMAST East, Rooms 101/102
And via Zoom
Abstract:
A 22-year (1994-2015) HYbrid Coordinate Ocean Model (HYCOM) global reanalysis is used to study the generation mechanism of the counter-wind characteristic of the South China Sea Warm Current (SCSWC) in winter seasons. Our analysis clearly demonstrates that the counter-wind SCSWC in winter is driven by wind relaxation. An Extended Empirical Orthogonal Function (EEOF) analysis of the hourly Sea Surface Height (SSH) and wind stresses reveals that the most dominant SSH mode is an Ekman mode. When the wind relaxes, the Ekman transport anomaly is offshore and generates a favorable cross-shore SSH slope for the northeastward surface currents over the continental shelf mainly by geostrophic balance. The alongshore pressure gradient force also increases when the wind relaxes, and dominates the weak wind stresses to push the alongshore water northeastwards. We also identify the region south of Taiwan Strait as the origin of the SCSWC, instead of the Hainan Island or Gulf of Tonkin, Vietnam due to the dominant Ekman dynamics.
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Join Zoom Meeting
https://umassd.zoom.us/j/97440069270?pwd=L2Z1bDZESTFCKzJYZWduYVhWenYvZz09
Meeting ID: 974 4006 9270
Passcode: 428029
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Meeting ID: 974 4006 9270
Passcode: 428029
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149.137.24.110 (Japan Osaka)
Meeting ID: 974 4006 9270
Passcode: 428029
********************************************************************************
For additional information, please contact Sydney Carreiro at scarreiro1@umassd.edu.
Department of Estuarine and Ocean Sciences
Seminar Announcement
“What is the generation mechanism of the counter-wind South China Sea Warm Current in winter”
Dr. Zhitao Yu
NRL Stennis
Wednesday, April 5, 2023
12:30 pm – 1:30 pm
SMAST East, Rooms 101/102
And via Zoom
Abstract:
A 22-year (1994-2015) HYbrid Coordinate Ocean Model (HYCOM) global reanalysis is used to study the generation mechanism of the counter-wind characteristic of the South China Sea Warm Current (SCSWC) in winter seasons. Our analysis clearly demonstrates that the counter-wind SCSWC in winter is driven by wind relaxation. An Extended Empirical Orthogonal Function (EEOF) analysis of the hourly Sea Surface Height (SSH) and wind stresses reveals that the most dominant SSH mode is an Ekman mode. When the wind relaxes, the Ekman transport anomaly is offshore and generates a favorable cross-shore SSH slope for the northeastward surface currents over the continental shelf mainly by geostrophic balance. The alongshore pressure gradient force also increases when the wind relaxes, and dominates the weak wind stresses to push the alongshore water northeastwards. We also identify the region south of Taiwan Strait as the origin of the SCSWC, instead of the Hainan Island or Gulf of Tonkin, Vietnam due to the dominant Ekman dynamics.
********************************************************************************
Join Zoom Meeting
https://umassd.zoom.us/j/97440069270?pwd=L2Z1bDZESTFCKzJYZWduYVhWenYvZz09
Meeting ID: 974 4006 9270
Passcode: 428029
One tap mobile
+13017158592,,97440069270#,,,,*428029# US (Washington DC)
+13126266799,,97440069270#,,,,*428029# 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)
Meeting ID: 974 4006 9270
Passcode: 428029
Find your local number: https://umassd.zoom.us/u/adtxYu9NMO
Join by SIP
97440069270@zoomcrc.com
Join by H.323
162.255.37.11 (US West)
162.255.36.11 (US East)
115.114.131.7 (India Mumbai)
115.114.115.7 (India Hyderabad)
213.19.144.110 (Amsterdam Netherlands)
213.244.140.110 (Germany)
103.122.166.55 (Australia Sydney)
103.122.167.55 (Australia Melbourne)
149.137.40.110 (Singapore)
64.211.144.160 (Brazil)
149.137.68.253 (Mexico)
69.174.57.160 (Canada Toronto)
65.39.152.160 (Canada Vancouver)
207.226.132.110 (Japan Tokyo)
149.137.24.110 (Japan Osaka)
Meeting ID: 974 4006 9270
Passcode: 428029
********************************************************************************
For additional information, please contact Sydney Carreiro at scarreiro1@umassd.edu.
Contact: > See Description for contact information
Topical Areas: School for Marine Sciences and Technology, SMAST Seminar Series