English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

. We present first measurements with a novel imaging technique for atmospherictrace gases in the UV spectral range. Imaging Fabry–Perot interferometercorrelation spectroscopy (IFPICS) employs a Fabry–Perot interferometer(FPI) as the wavelength-selective element. Matching the FPI's distinct, periodictransmission features to the characteristic differential absorption structuresof the investigated trace gas allows us to measure differential atmosphericcolumn density (CD) distributions of numerous trace gases with high spatialand temporal resolution. Here we demonstrate measurements of sulfur dioxide( SO2 ), while earlier model calculations show that bromine monoxide( BrO ) and nitrogen dioxide ( NO2 ) are also possible. The highspecificity in the spectral detection of IFPICS minimises cross-interferencesto other trace gases and aerosol extinction, allowing precise determination ofgas fluxes. Furthermore, the instrument response can be modelled usingabsorption cross sections and a solar atlas spectrum from the literature,thereby avoiding additional calibration procedures, e.g. using gas cells. In afield campaign, we recorded the temporal CD evolution of SO2 in thevolcanic plume of Mt. Etna, with an exposure time of 1 s and 400×400  pixel spatial resolution. The temporal resolution of the timeseries was limited by the available non-ideal prototype hardware to about 5.5 s . Nevertheless, a detection limit of 2.1×1017 molec cm−2 could be reached, which is comparable totraditional and much less selective volcanic SO2 imaging techniques.

Quantitative imaging of volcanic SO&lt;sub&gt;2&lt;/sub&gt; plumes using Fabry–Pérot interferometer correlation spectroscopy

Quantitative imaging of volcanic SO<sub>2</sub> plumes using Fabry–Pérot interferometer correlation spectroscopy