PROCEEDing from surface to sensitivity: confronting a perturbed parameter ensemble with ARM observations
Daniel McCoy
University of Wyoming
Abstract: Parameterized processes continue to be the largest source of uncertainty in the climate forcing and feedback predicted by Earth System Models (ESMs). One way to confront parametric uncertainty in ESMs is through a perturbed parameter ensemble (PPE). Here, we present preliminary work implementing a PPE hosted in E3SMv3 focusing on constraining aerosol-cloud-precipitation interactions (ACPIs). In situ and surface observations are a natural choice to confront and constrain the microphysical processes driving ACPIs, but the way to do that is somewhat ambiguous. In this presentation we present a path towards leveraging observations, including from Atmospheric Radiation Measurement (ARM) East North Atlantic (ENA) observations, to constrain aerosol-cloud interactions in E3SMv3.
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A Planetary-Scale Data–Model Integration Framework to Resolve Urban Impacts Across Scales
Tirthankar "TC" Chakraborty
Pacific Northwest National Laboratory
Abstract: Urbanization leads to widespread modifications to the Earth’s land surface and directly impacts more than half the global population by influencing weather and local climate. These impacts are expected to magnify in the future due to increased urbanization and greater rural-to-urban migration. Current generations of Earth system models (ESMs) inadequately represent urban areas and processes, either ignoring urban land completely or treating cities like biologically inactive surfaces with broadly specified radiative, thermodynamic, and aerodynamic properties. The limited number of ESMs that represent urban areas do not account for temporal changes due to urban evolution, which is the combined result of urban expansion and varying urban surface properties over time. All these issues are particularly relevant for complex coastal–urban environments, which are characterized by strong land-to-water spatial gradients in both surface and atmospheric variables and rapid historical and projected urban growth. My recently awarded Department of Energy (DOE) Early Career Project aims to address some of these gaps by developing a globally consistent data–model integration framework for DOE’s Energy Exascale Earth System Model (E3SM) to resolve urbanization and its feedbacks to the atmosphere across multiple spatiotemporal scales with a focus on coastal U.S. cities. This talk will give a short overview of the importance of urbanization on weather and climate and discuss the key themes of my proposed work.
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PROCEEDing from surface to sensitivity: confronting a perturbed parameter ensemble with ARM observations | Daniel McCoy
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