Department of Fisheries Oceanography Weekly Seminar Announcement - Lu Wang
When: Wednesday,
September 14, 2022
2:30 PM
-
3:30 PM
Where: > See description for location
Description: The School for Marine Science and Technology
Department of Fisheries Oceanography
Weekly Seminar Announcement
"Modeling study of ocean acidification in the US northeast coastal region"
By
Lu Wang
PhD Candidate
Department of Fisheries Oceanography
Wednesday, September 14, 2022
2:30 pm - 3:30 pm
SMAST East, Rooms 101/102
and via Zoom
Abstract:
The ocean acidification (OA) condition in the US northeast coastal region changes over multi-time scales, with upwelling caused by Warm Core Rings (WCRs) and Warm Core Eddies (WCEs), the coastal river discharge, and a long-term variability due to climate change-induced interannual-decadal fluctuation of atmospheric CO2 loading and the global warming. However, the contribution of these factors to OA requires comprehensive regional studies in the US northeast coastal region. The variability is manifested through the fully nonlinear interaction of physical, biological, and chemical processes. The Northeast Biogeochemistry and Ecosystem Model (NeBEM) was developed and validated for the year 2017 and 2018 to estimate the contributions of WCRs and WCEs to the nitrogen and carbon flux over the US northeast shelf region. During January to April, the results showed that the fluxes were 29%, 26%, and 33% higher over the WCRs and WCEs periods in Scotia Shelf, Northeast Chanel, and Mid-Atlantic Bight, respectively. The WCRs and WCEs intrusion significantly reduced the offshore nutrient flux over the Georges Bank. Sensitivity studies were conducted to quantify the contribution of increased atmospheric CO2, sea surface temperature (SST), and river discharges. By the year of 2050, the vertically averaged aragonite saturation state ( ) will decrease 1-11% in the condition of atmospheric CO2 increased at a rate of 2.18ppm/y. The increased SST (2.24 °C) will intensify the circulation of Georges Bank. Furthermore, the vertically averaged will increase 3-13% under this condition. However, the influence on OA of both increased atmosphere CO2 and increased SST will almost cancel with each other at this increasing rate with a change rate of between -1-1%.
*****************************************************************************
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
Weekly Seminar Announcement
"Modeling study of ocean acidification in the US northeast coastal region"
By
Lu Wang
PhD Candidate
Department of Fisheries Oceanography
Wednesday, September 14, 2022
2:30 pm - 3:30 pm
SMAST East, Rooms 101/102
and via Zoom
Abstract:
The ocean acidification (OA) condition in the US northeast coastal region changes over multi-time scales, with upwelling caused by Warm Core Rings (WCRs) and Warm Core Eddies (WCEs), the coastal river discharge, and a long-term variability due to climate change-induced interannual-decadal fluctuation of atmospheric CO2 loading and the global warming. However, the contribution of these factors to OA requires comprehensive regional studies in the US northeast coastal region. The variability is manifested through the fully nonlinear interaction of physical, biological, and chemical processes. The Northeast Biogeochemistry and Ecosystem Model (NeBEM) was developed and validated for the year 2017 and 2018 to estimate the contributions of WCRs and WCEs to the nitrogen and carbon flux over the US northeast shelf region. During January to April, the results showed that the fluxes were 29%, 26%, and 33% higher over the WCRs and WCEs periods in Scotia Shelf, Northeast Chanel, and Mid-Atlantic Bight, respectively. The WCRs and WCEs intrusion significantly reduced the offshore nutrient flux over the Georges Bank. Sensitivity studies were conducted to quantify the contribution of increased atmospheric CO2, sea surface temperature (SST), and river discharges. By the year of 2050, the vertically averaged aragonite saturation state ( ) will decrease 1-11% in the condition of atmospheric CO2 increased at a rate of 2.18ppm/y. The increased SST (2.24 °C) will intensify the circulation of Georges Bank. Furthermore, the vertically averaged will increase 3-13% under this condition. However, the influence on OA of both increased atmosphere CO2 and increased SST will almost cancel with each other at this increasing rate with a change rate of between -1-1%.
*****************************************************************************
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