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Measuring So2 Ship Emissions with an Ultra-violet Imaging Camera : Volume 6, Issue 6 (05/11/2013)

By Prata, A. J.

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Book Id: WPLBN0004000011
Format Type: PDF Article :
File Size: Pages 45
Reproduction Date: 2015

Title: Measuring So2 Ship Emissions with an Ultra-violet Imaging Camera : Volume 6, Issue 6 (05/11/2013)  
Author: Prata, A. J.
Volume: Vol. 6, Issue 6
Language: English
Subject: Science, Atmospheric, Measurement
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Prata, A. J. (2013). Measuring So2 Ship Emissions with an Ultra-violet Imaging Camera : Volume 6, Issue 6 (05/11/2013). Retrieved from

Description: Nicarnica Aviation AS, 2007 Kjeller, Norway. Over the last few years fast-sampling ultra-violet (UV) imaging cameras have been developed for use in measuring SO2 emissions from industrial sources (e.g. power plants; typical fluxes ~1–10 kg s−1) and natural sources (e.g. volcanoes; typical fluxes ~10–100 kg s−1). Generally, measurements have been made from sources rich in SO2 with high concentrations and fluxes. In this work, for the first time, a UV camera has been used to measure the much lower concentrations and fluxes of SO2 (typical fluxes ~0.01–0.1 kg s−1) in the plumes from moving and stationary ships. Some innovations and trade-offs have been made so that estimates of the fluxes and path concentrations can be retrieved in real-time. Field experiments were conducted at Kongsfjord in Ny Ålesund, Svalbard, where emissions from cruise ships were made, and at the port of Rotterdam, Netherlands, measuring emissions from more than 10 different container and cargo ships. In all cases SO2 path concentrations could be estimated and fluxes determined by measuring ship plume speeds simultaneously using the camera, or by using surface wind speed data from an independent source. Accuracies were compromised in some cases because of the presence of particulates in some ship emissions and the restriction of single-filter UV imagery, a requirement for fast-sampling (>10 Hz) from a single camera. Typical accuracies ranged from 10–30% in path concentration and 10–40% in flux estimation. Despite the ease of use and ability to determine SO2 fluxes from the UV camera system, the limitation in accuracy and precision suggest that the system may only be used under rather ideal circumstances and that currently the technology needs further development to serve as a method to monitor ship emissions for regulatory purposes.

Measuring SO2 ship emissions with an ultra-violet imaging camera

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