| Summary: | It is well known that halogen chemistry in polar regions is unique and has a very consequential impact on the composition and chemistry of the lower atmosphere. Understanding this rare halogen chemistry and composition is necessary as rapid environmental changes in the Arctic have an impact globally. Typically to characterize the large-scale impact of atmospheric processes, 1D and 3D models are tested with known chemistry and meteorology. To enable the pursuit of such models a 12-m tower was erected on the Barrow Environmental Observatory during March of 2016 to May. The project team during the Photochemical Halogen and Ozone eXchange: a Meterological Experiment on Layered Turbulence (PHOXMELT), measured halogen fluxes and vertical mixing to constrain a one-dimensional (vertical scale) numerical model to investigate the impact of the surface fluxes, and how this might change as the surface is altered by climate change. Turbulence data is part of the data set used to study the attributes of the Arctic atmospheric surface layer during the spring time period. Eight levels of Campbell Scientific CSAT3D sonic anemometers were placed on a 12-m tower above the snow. The resulting field data and observations were used to develop and test an explicit 1D model, which can be used to address the project questions, and incorporated into larger-scale 3D and Earth system models.
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