Following publications have been announced by our department of Optical Oceanography. For further information please contact the marked authors and co-authors of the publications:
Carlson, D.F., Carr, G., Crosbie, J.L., Lundgren, P., Peissel, N., Pett, P., Turner, W., & Rysgaard, S. (2021): The 2017 Mission Arctic Citizen Science Sailing Expedition Conductivity, Temperature, and Depth Profiles in Western Greenland and Baffin Bay. Front. Mar. Sci. 8:665582, doi:10.3389/fmars.2021.665582
Observations in remote and harsh Arctic environments can be difficult and costly. Additionally, the number of research vessels that operate in Greenlandic waters are limited and are highly sought after. Sailboats have been used as measurement platforms in the region (Miller et al., 1995; Karnovsky et al., 2010; Johannessen et al., 2011; Fenty et al., 2016; Nicoli et al., 2018; Aliani et al., 2020; Bouchard et al., 2020) and marine monitoring programs should leverage the increase in Arctic tourism aboard cruise ships and private yachts (Dawson, 2019; Leoni, 2019; Palma et al., 2019) to increase the spatiotemporal coverage of ocean observations in Greenlandic waters. While sailboats lack the resources of dedicated research vessels, they are small, maneuverable, and flexible, and therefore, are well-suited for citizen science (Simoniello et al., 2019).
Here, we present a pilot project that demonstrated the ability of citizen scientists aboard a sailboat to independently acquire hydrographic data in remote marine environments that are impacted by glacial runoff. The Mission Arctic citizen science sailing expedition collected profiles of temperature and salinity from July to September 2017 in the upper ~60 m of the water column in western Greenland, Nares Strait, and Baffin Bay (Figure 1). This report describes the expedition, hydrographic data collection and quality control procedures, the final data set, and presents preliminary results.
Harmel, T., Agagliate, J., Hieronymi, M., & Gernez, P. (2021): Two-term Reynolds–McCormick phase function parameterization better describes light scattering by microalgae and mineral hydrosols. Optics Letters, 46(8), 1860-1863, doi:10.1364/OL.420344
The presence of hydrosols, taken as suspension of micro- or macroscopic material in water, strongly alters light propagation and thus the radiance distribution within a natural or artificial water volume. Understanding of hydrosols’ impacts on light propagation is limited by our ability to accurately handle the angular scattering phase function inherent to complex material such as suspended sediments or living cells. Based on actual quality-controlled measurements of sediments and microalgae, this Letter demonstrates the superiority of a two-term five-parameter empirical phase function as recently proposed for scattering by nanoparticle layers [Nanoscale 11, 7404 (2019)]. The use of such phase function parameterizations presents new potentialities for various radiative transfer and remote sensing applications related to an aquatic environment.