Assessing the Role of Parameterized Turbulence on Tropical Cyclones and the Mean Climate in the Community Earth System Model
Open Access
Author:
Nardi, Kyle
Graduate Program:
Meteorology and Atmospheric Science
Degree:
Doctor of Philosophy
Document Type:
Dissertation
Date of Defense:
November 19, 2024
Committee Members:
Paul Markowski, Program Head/Chair Colin Zarzycki, Chair & Dissertation Advisor Guido Cervone, Outside Unit & Field Member George Bryan, Special Member Kelly Lombardo, Major Field Member David Stensrud, Major Field Member
Keywords:
Climate Modeling Weather Parameter Sensitivity
Abstract:
Earth System Models (ESMs) simulate the interaction of various components of the global Earth system. This includes, but is not limited to, atmospheric, oceanic, land, and sea ice processes. With enhanced computational capacity, we can now run ESMs at finer horizontal and vertical resolutions. However, despite these advances, many ESMs are incapable of resolving certain small-scale processes like boundary layer (PBL) turbulence. Therefore, these processes need to be estimated, or parameterized, based on theoretical or observed relationships with resolved fields. Prior studies have demonstrated that the choice of PBL parameterization is a key source of uncertainty in models of various spatial scales. In this study, we seek to understand how the parameterization of PBL turbulence, specifically the depiction of momentum fluxes, affects ESM model output.
To answer this question, we use the Community Atmosphere Model version 6 (CAM6), the atmospheric component of the Community Earth System Model version 2 (CESM2)
