University Events

Description: The School for Marine Science and Technology
Department of Fisheries Oceanography
PhD Proposal Defense

"Modeling Studies of Ocean Acidification over the US Northeast Shelf"

By
Lu Wang

Advisor:
Dr. Changsheng Chen, Professor, Department of Fisheries Oceanography, SMAST, UMD

Committee Members:
Dr. Geoffrey Cowles, Department of Fisheries Oceanography, SMAST, UMD
Dr. Joe Salisbury, Ocean Processes Analysis Laboratory, UNH
Dr. Kevin Stokesbury, Department of Fisheries Oceanography, SMAST, UMD
Dr. Robert Beardsley, Department of Physical Oceanography, WHOI
Dr. Rubao Ji, Biology Department, WHOI

Tuesday, February 23, 2021
1:00 pm
via Zoom

Abstract

The goal of my Ph.D. dissertation research is to study and understand the complex biogeochemical and physical processes controlling the spatial and temporal variability of ocean acidification in the US northeast coastal region. My Ph.D. thesis research includes three components: 1) developing and validating NeBEM; 2) applying NeBEM to the US northeast coastal region to examine if this model is robust to simulate the observed biophysical processes; 3) examining the biophysical process attributing to the seasonal variability of ocean acidification in the region. I have completed 1) and am working on 2) and 3). I hypothesize that the enhanced acidification condition in the region changes over multi-time scales, with short-term variability caused mainly by the seasonality of lower trophic level biological respiration, precipitation minus evaporation, and changes in coastal river discharge and a long-term variability due to climate change-induced interannual-decadal fluctuation of atmospheric CO2 loading and the inflow of the cool and less saltwater from the upstream. It is clear that the variability is manifested through the fully nonlinear interaction of physical, biological, and chemical processes. We must develop a fully three-dimensional, prognostic acidification model if we are to understand the complex coastal acidification process in the northeastern coastal region and if we are to provide stakeholders with a scientific and visual tool with which to assess and predict the acidification condition in the region. For this reason, I propose to focus my research first on the model development and validation and then used the validated model to examine the biophysical process controlling the acidification in the study region
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For additional information, please contact Sue Silva at s1silva@umassd.edu