Wintertime aerosol measurements during the Chilean Coastal Orographic Precipitation Experiment
<p>The Chilean Coastal Orographic Precipitation Experiment (CCOPE) was a 3-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...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2019-10-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://www.atmos-chem-phys.net/19/12377/2019/acp-19-12377-2019.pdf |
| Summary: | <p>The Chilean Coastal Orographic Precipitation Experiment (CCOPE) was a
3-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 data were compared to values measured at the NOAA observatory
Trinidad Head (THD) on the northern Pacific coast of California. The
winter-averaged CPC concentration at Arauco is 2971 <span class="inline-formula">±</span> 1802 cm<span class="inline-formula"><sup>−3</sup></span>; at THD the average is 1059 <span class="inline-formula">±</span> 855 cm<span class="inline-formula"><sup>−3</sup></span>.
Despite the typically more pristine South Pacific region, the Arauco
average is larger than at THD (<span class="inline-formula"><i>p</i><0.01</span>). Aerosol size distributions
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.</p> |
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| ISSN: | 1680-7316 1680-7324 |