Publication Abstracts
Rivera et al. 2024
Rivera, A., , , and D. Shindell, 2024: Assessing acetone for the GISS ModelE2.1 Earth system model. Geosci. Model Dev., 17, no. 8, 3487-3505, doi:10.5194/gmd-17-3487-2024.
Acetone is an abundant volatile organic compound (VOC) in the atmosphere, with important influences on ozone and oxidation capacity. Direct sources include chemical production from other VOCs and anthropogenic emissions, terrestrial vegetation, biomass-burning emissions, and ocean production. Sinks include chemical loss, deposition onto the land surface, and ocean uptake. Acetone also has a lifetime that is long enough to allow transport and reactions with other compounds remote from its sources. The NASA Goddard Institute for Space Studies (GISS) Earth system model ModelE2.1 simulates a variety of Earth system interactions. Previously, acetone had a very simplistic representation in the ModelE chemical scheme. This study assesses a more sophisticated acetone scheme in which acetone is a full 3-dimensional tracer with explicit sources, sinks, and atmospheric transport. We first evaluate the new global acetone budget in the context of past literature. Estimated source and sink fluxes fall within the range of previous models, although total atmospheric burden and lifetime are at the lower end of the published literature. Acetone's new representation in ModelE2.1 also results in more realistic spatial and vertical distributions, which we compare against previous models and field observations. The seasonality of acetone-related processes was also studied in conjunction with field measurements, and these comparisons show promising agreement but also shortcomings at high-emission urban locations, where the model's resolution is too coarse to capture the true behavior. Finally, we conduct a variety of sensitivity studies that explore the influence of key parameters on the acetone budget and its global distribution. An impactful finding is that the production of acetone from precursor hydrocarbon oxidation has strong leverage on the overall chemical source, indicating the importance of accurate molar yields. Overall, our implementation is one that corroborates with previous studies and marks a significant improvement in the development of the acetone tracer in GISS ModelE2.1.
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BibTeX Citation
@article{ri06010c,
author={Rivera, A. and Tsigaridis, K. and Faluvegi, G. and Shindell, D.},
title={Assessing acetone for the GISS ModelE2.1 Earth system model},
year={2024},
journal={Geoscientific Model Development},
volume={17},
number={8},
pages={3487--3505},
doi={10.5194/gmd-17-3487-2024},
}
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RIS Citation
TY - JOUR ID - ri06010c AU - Rivera, A. AU - Tsigaridis, K. AU - Faluvegi, G. AU - Shindell, D. PY - 2024 TI - Assessing acetone for the GISS ModelE2.1 Earth system model JA - Geosci. Model Dev. JO - Geoscientific Model Development VL - 17 IS - 8 SP - 3487 EP - 3505 DO - 10.5194/gmd-17-3487-2024 ER -
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