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| Titel |
A low power automated MAX-DOAS instrument for the Arctic and other remote unmanned locations |
| VerfasserIn |
D. Carlson, D. Donohoue, U. Platt, W. R. Simpson |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 3, no. 2 ; Nr. 3, no. 2 (2010-03-31), S.429-439 |
| Datensatznummer |
250000974
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| Publikation (Nr.) |
 copernicus.org/amt-3-429-2010.pdf |
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| Zusammenfassung |
| Multiple Axis Differential Optical Absorption Spectrometer (MAX-DOAS)
systems are inherently very simple instruments, which have been shown to
provide extremely useful information about a wide variety of environmental
parameters. In order to exploit the potential of the technique we have
developed a new field-deployable, passive MAX-DOAS system that is automated
and uses little power (<3 W). This new instrument utilizes a fully
enclosed scan head that protects all moving parts and optics from harsh
environments. Instrument diagnostics, such as tilt monitoring and frost
accumulation detection and removal, are integrated into the main data
acquisition program, which then acts to remedy problems that were
discovered. This full automation and data quality checking make this
instrument ideal for long-term deployment at remote, unmanned locations
around the world, such as in polar regions or in the monitoring of trace gas
emissions from volcanoes. This instrument was recently integrated into an
ice-tethered autonomous buoy and tested in Elson Lagoon, near Barrow, Alaska
to monitor halogen chemistry in the Arctic. During this investigation,
differential slant column densities (dSCDs) of BrO up to
6×1014 molecules/cm2 were observed. Typical spectral fit
residual RMS optical densities were less than 6×10−4 for solar
zenith angles (SZA) <80° and a 6-min integration time. Here we describe
the design concepts and performance of this new MAX-DOAS instrument through
detailed analyses of spectral quality, power usage, possible instrument
response biases, and typical instrument operations. |
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