Gas phase acid, ammonia and aerosol ionic and trace element concentrations at Cape Verde during the Reactive Halogens in the Marine Boundary Layer (RHaMBLe) 2007 intensive sampling period

R. Sander,J. R. Maben,E. Crete,W. C. Keene,B. Deegan,A. H. Young,M. S. Long,A. A. P. Pszenny

doi:10.5194/essd-5-385-2013

Abstract

Abstract. We report mixing ratios of soluble reactive trace gases sampled with mist chambers and the chemical composition of bulk aerosol and volatile inorganic bromine (Brg) sampled with filter packs during the Reactive Halogens in the Marine Boundary Layer (RHaMBLe) field campaign at the Cape Verde Atmospheric Observatory (CVAO) on São Vicente island in the tropical North Atlantic in May and June 2007. The gas-phase data include HCl, HNO3, HONO, HCOOH, CH3COOH, NH3, and volatile reactive chlorine other than HCl (Cl*). Aerosol samples were analyzed by neutron activation (Na, Al, Cl, V, Mn, and Br) and ion chromatography (SO42−, Cl−, Br−, NH4+, Na+, K+, Mg2+, and Ca2+). Content and quality of the data, which are available under doi:10.5281/zenodo.6956, are presented and discussed.

Highlights

Multiphase halogen chemistry impacts important, interrelated chemical processes in marine air
We report mixing ratios of soluble reactive trace gases sampled with mist chambers and the chemical composition of bulk aerosol and volatile inorganic bromine (Brg) sampled with filter packs during the Reactive Halogens in the Marine Boundary Layer (RHaMBLe) field campaign at the Cape Verde Atmospheric Observatory (CVAO) on São Vicente island in the tropical North Atlantic in May and June 2007
Bromine activation chemistry leads to catalytic ozone destruction and modification of oxidation processes including HOx and NOx cycling

Summary

Introduction

Multiphase halogen chemistry impacts important, interrelated chemical processes in marine air. Bromine activation chemistry leads to catalytic ozone destruction and modification of oxidation processes including HOx and NOx cycling. Spatiotemporal variability in many reactants, products and reaction pathways are poorly characterized, rendering uncertain the global significance of tropospheric halogen chemistry

Data set description and access

Mist chambers

Filter-pack sampling and chemical analysis

Findings

Data summary