Articles | Volume 17, issue 23
Atmos. Chem. Phys., 17, 14747–14770, 2017
https://doi.org/10.5194/acp-17-14747-2017
Atmos. Chem. Phys., 17, 14747–14770, 2017
https://doi.org/10.5194/acp-17-14747-2017

Research article 12 Dec 2017

Research article | 12 Dec 2017

Observational assessment of the role of nocturnal residual-layer chemistry in determining daytime surface particulate nitrate concentrations

Gouri Prabhakar et al.

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This work assesses the processes that control the ambient concentrations of particulate nitrate in the the wintertime San Joaquin Valley of California through a combination of aircraft and surface measurements made during the DISCOVER-AQ study. We provide an observational demonstration of how nocturnal production and advection in aloft layers combines with daytime production and loss from entrainment and deposition to give rise to a distinct diurnal profile in surface nitrate concentrations.
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