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dc.contributor.authorSaide, P. E.
dc.contributor.authorSpak, S. N.
dc.contributor.authorCarmichael, G.R.
dc.contributor.authorMena-Carrasco, M. A.
dc.contributor.authorYang, Q.
dc.contributor.authorHowell, Robert R.
dc.contributor.authorLeon, D. C.
dc.contributor.authorSnider, J. R.
dc.contributor.authorBandy, A. R.
dc.contributor.authorCollett, J. L.
dc.contributor.authorBenedict, K. B.
dc.contributor.authorde Szoeke, S. P.
dc.contributor.authorHawkins, L. N.
dc.contributor.authorAllen, G.
dc.contributor.authorCrawford, I.
dc.contributor.authorCrosier, J.
dc.contributor.authorSpringston, S. R.
dc.contributor.authorSaide, P. E.
dc.contributor.authorSpak, S. N.
dc.contributor.authorCarmichael, G.R.
dc.contributor.authorMena-Carrasco, M. A.
dc.contributor.authorYang, Q.
dc.contributor.authorHowell, Robert R.
dc.contributor.authorLeon, D. C.
dc.contributor.authorSnider, J. R.
dc.contributor.authorBandy, A. R.
dc.contributor.authorCollett, J. L.
dc.contributor.authorBenedict, K. B.
dc.contributor.authorde Szoeke, S. P.
dc.contributor.authorHawkins, L. N.
dc.contributor.authorAllen, G.
dc.contributor.authorCrawford, I.
dc.contributor.authorCrosier, J.
dc.contributor.authorSpringston, S. R.
dc.date2012-03-29
dc.date.accessioned2018-06-10T21:30:53Z
dc.date.available2018-06-10T21:30:53Z
dc.description©2012 Author(s).
dc.description.abstractWe evaluate a regional-scale simulation with the WRF-Chem model for the VAMOS (Variability of the American Monsoon Systems) Ocean-Cloud-Atmosphere-Land Study Regional Experiment (VOCALS-REx), which sampled the Southeast Pacific's persistent stratocumulus deck. Evaluation of VOCALS-REx ship-based and three aircraft observations focuses on analyzing how aerosol loading affects marine boundary layer (MBL) dynamics and cloud microphysics. We compare local time series and campaign-averaged longitudinal gradients, and highlight differences in model simulations with (W) and without (NW) wet deposition processes. The higher aerosol loadings in the NW case produce considerable changes in MBL dynamics and cloud microphysics, in accordance with the established conceptual model of aerosol indirect effects. These include increase in cloud albedo, increase in MBL and cloud heights, drizzle suppression, increase in liquid water content, and increase in cloud lifetime. Moreover, better statistical representation of aerosol mass and number concentration improves model fidelity in reproducing observed spatial and temporal variability in cloud properties, including top and base height, droplet concentration, water content, rain rate, optical depth (COD) and liquid water path (LWP). Together, these help to quantify confidence in WRF-Chem's modeled aerosol-cloud interactions, especially in the activation parameterization, while identifying structural and parametric uncertainties including: irreversibility in rain wet removal; overestimation of marine DMS and sea salt emissions, and accelerated aqueous sulfate conversion. Our findings suggest that WRF-Chem simulates marine cloud-aerosol interactions at a level sufficient for applications in forecasting weather and air quality and studying aerosol climate forcing, and may do so with the reliability required for policy analysis.
dc.identifier.doi10.5194/acp-12-3045-2012
dc.identifier.urihttps://hdl.handle.net/20.500.11919/1182
dc.languageEnglish
dc.publisherUniversity of Wyoming. Libraries
dc.relation.ispartofFaculty Publication - Geology & Geophysics
dc.rightshttp://creativecommons.org/licenses/by/3.0/
dc.sourceGeology and Geophysics Faculty Publications
dc.subjectaerosol
dc.subjectairborne survey
dc.subjectatmospheric modeling
dc.subjectboundary layer
dc.subjectclimate forcing
dc.subjectcloud microphysics
dc.subjectcomputer simulation
dc.subjectexperimental study
dc.subjectmarine atmosphere
dc.subjectobservational method
dc.subjectspatial variation
dc.subjectstratocumulus
dc.subjecttemporal variation
dc.subjecttime series analysis
dc.subjectwet deposition
dc.titleEvaluating WRF-Chem Aerosol Indirect Effects in Southeast Pacific Marine Stratocumulus During VOCALS-REx
dc.typeJournal contribution
dcterms.title.journalAtmospheric Chemistry and Physics
thesis.degree.disciplineGeology


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