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Abstract
Abstract. A novel automated enclosure for protecting solar-tracking atmospheric instruments was designed, constructed, and successfully tested under various weather conditions. A complete automated measurement system, consisting of a compact solar-tracking Fourier transform infrared (FTIR) spectrometer (EM27/SUN) and the enclosure, has been deployed in central Munich to monitor greenhouse gases since 2016 and withstood all critical weather conditions, including rain, storms, and snow. It provided ground-based measurements of column-averaged concentrations of CO2, CH4, O2, and H2O throughout this time.The enclosure protects the instrument from harmful environmental influences while allowing open-path measurements in sunny weather. The newly developed and patented cover, a key component of the enclosure, permits unblocked solar measurements while reliably protecting the instrument. This enables dynamic decision regarding taking measurements, and thus increases the number of data samples. This enclosure leads to a fully automated measurement system, which collects data whenever possible without any human interaction. In the long term, the enclosure will provide the foundation for a permanent greenhouse gas monitoring sensor network.
Highlights
1 Introduction Anthropogenic greenhouse gas (GHG) emissions into the atmosphere have risen to a worrying level over the last few decades
We have developed an automated enclosure (Fig. 1) that houses and protects the measurement system, while allowing measurements during good weather conditions
The automated solar-tracking system is located in central Munich (48.15◦ N, 11.57◦ E)
Summary
Anthropogenic greenhouse gas (GHG) emissions into the atmosphere have risen to a worrying level over the last few decades. The prime directive for the enclosure design is reliable protection and maximized amount of measurement data. 3-D computer-aided design (CAD) model of the enclosure including the base cabinet, the cover, the thermal electrical cooler, and the rain sensor. Enclosure control board Sun tracker (inside the cover)
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