Aerosols and boundary-layer structure in the ACE-ENA summer 2017 campaign

 
Poster PDF

Authors

Matthew C. Wyant — University of Washington
Robert Wood — University of Washington

Category

ARM field campaigns – Results from recent ARM field campaigns

Description

During the ACE-ENA summer campaign (June-July 2017), the ARM AAF G-1 performed 20 daytime flights in the vicinity of the ARM ENA site at Graciosa. These flights sampled the the marine boundary layer, cloud-top inversion, and above-inversion regions. Here we focus on the boundary layer evolution and aerosol vertical structure during the campaign period. Relatively high aerosol concentrations (as measured by PCASP) were observed in the June flights, with much lower concentrations in the middle part of July. Qualitatively similar contrasts were present in CCN and CO concentrations. Black carbon concentrations have an opposite pattern with relatively high mass concentrations during the mid-July period. On many flight days PCASP aerosol concentrations were highest near the surface, and higher in the boundary layer than above the marine inversion, suggesting a prominent sea-salt component of aerosol. We hope to compare these results with preliminary data from the Feburary 2018 ACE-ENA flight campaign.