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- Title
Wintertime Aerosol Measurements during the Chilean Coastal Orographic Precipitation Experiment.
- Authors
Fults, Sara Lynn; Massmann, Adam K.; Montecinos, Aldo; Andrews, Elisabeth; Kingsmill, David E.; Minder, Justin R.; Garreaud, René D.; Snider, Jefferson R.
- Abstract
The Chilean Coastal Orographic Precipitation Experiment (CCOPE) was a three-month field campaign (June, July and August 2015) that investigated wintertime coastal rain events. Reported here are analyses of aerosol measurements made at a coastal site during CCOPE. The aerosol monitoring site was located near Arauco, Chile. Aerosol number concentrations and aerosol size distributions were acquired with a Condensation Particle Counter (CPC) and an Ultra High Sensitivity Aerosol Spectrometer (UHSAS). Arauco CPC concentrations were compared to those measured at the NOAA observatory Trinidad Head (THD) on the North Pacific Coast of California. The winter averaged CPC concentration at Arauco is 2971cm-3±1802cm-3; at THD the average is 1059cm-3±855cm-3. Despite the typically more pristine Southern Pacific region, the Arauco average is larger than at THD (p<0.01). Aerosol size distribution measurements acquired during episodes of onshore flow were analyzed with Köhler theory and used to parameterize cloud condensation nuclei activation spectra. In addition, sea salt aerosol (SSA) concentration was parameterized as a function of sea surface wind speed. It is anticipated these parameterizations will be applied in modeling of wintertime Chilean coastal precipitation.
- Subjects
CALIFORNIA; CHILE; SEA salt aerosols; CLOUD condensation nuclei; AEROSOLS; UNITED States. National Oceanic &; Atmospheric Administration; WINTER; METEOROLOGICAL precipitation; CLOUD droplets
- Publication
Atmospheric Chemistry & Physics Discussions, 2019, p1
- ISSN
1680-7367
- Publication type
Article
- DOI
10.5194/acp-2019-185