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Vertical profile of elemental concentrations in aerosol particles in the Bermuda area during GCE/CASE/WATOX
Author(s) -
Ennis G.,
Sievering H.
Publication year - 1990
Publication title -
global biogeochemical cycles
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.512
H-Index - 187
eISSN - 1944-9224
pISSN - 0886-6236
DOI - 10.1029/gb004i002p00179
Subject(s) - aerosol , environmental science , mineral dust , air mass (solar energy) , atmospheric sciences , oceanography , particulates , mass concentration (chemistry) , environmental chemistry , mineralogy , chemistry , geology , meteorology , geography , physics , organic chemistry , boundary layer , thermodynamics
During the 1988 Global Change Expedition/Coordinated Air‐Sea Experiment/Western Atlantic Ocean Experiment (GCE/CASE/WATOX) joint effort, research was conducted to determine elemental concentrations in atmospheric aerosol particles near Bermuda, to construct a three‐level (15, 150, and 2600 m ASL) vertical profile of these concentrations, and to ascertain the source of the particles. Samples were collected by the NOAA King Air aircraft and NOAA ship Mt. Mitchell on July 24–28, 1988. Concentration determinations were made for 16 elements through the use of an X ray fluorescence instrument designed for analysis of small‐mass samples. A layering effect was found; concentrations of several elements at 150 m were more than twice their respective concentrations at 15 m and 2600 m. Enrichment factors, V/Mn ratio, and correlations between concentrations suggest a Saharan mineral source, despite air mass back trajectories that show no direct continental input for up to 10 days prior to sample collection. Estimated total mineral aerosol concentrations at 15 m, 150 m, and 2600 m are 1.5, 4.1, and 2.1 μg m −3 .