@article{821b38225c304b77aaf28819f3d83b5e,
title = "Mapping Ice Algal Blooms in Southwest Greenland From Space",
abstract = "Quantifying the distribution and abundance of ice algae is fundamental for understanding the evolving processes of algal blooms in supraglacial environments, particularly over the Greenland ice sheet, given the role of algal impurities in modulating surface albedo and meltwater production. Field observations of ice algae in Greenland are very limited over space and time. Here we show for the first time the regional variability in algal abundance across the dark zone in southwest Greenland, derived from Sentinel-3 images acquired during the summertime in 2016 and 2017. We demonstrate the capacity of Sentinel-3 imagery to characterize the spatial pattern of algal abundance using the reflectance ratios between 709- and 673-nm bands, highly consistent with field measurements. The estimated algal abundance reveals a significant linear growth pattern of algal population with time after the peak of dark ice presence, shown to be tightly linked to surface runoff and meltwater production.",
author = "Shujie Wang and Marco Tedesco and Min Xu and Alexander, {Patrick M.}",
note = "Funding Information: This work was supported by NSF award ANS 1713072, NASA Exobiology award 80NSSC18K0814, and NASA MAP 80NSSC17K0351. The Sentinel-3 OLCI level-1B data are freely available on the Copernicus Open Access Hub (https:// scihub.copernicus.eu/), courtesy of the European Space Agency. The MODIS MOD09GA and MOD10A1 data can be accessed from the NASA Land Processes Distributed Active Archive Center (https://search.earthdata.nasa.gov/). We also thank Xavier Fettweis for his contribution of MAR regional climate model outputs (ftp://ftp.climato.be/ fettweis/). The data derived in this study are available as a supporting information data set. Funding Information: This work was supported by NSF award ANS 1713072, NASA Exobiology award 80NSSC18K0814, and NASA MAP 80NSSC17K0351. The Sentinel-3 OLCI level-1B data are freely available on the Copernicus Open Access Hub (https://scihub.copernicus.eu/), courtesy of the European Space Agency. The MODIS MOD09GA and MOD10A1 data can be accessed from the NASA Land Processes Distributed Active Archive Center (https://search.earthdata.nasa.gov/). We also thank Xavier Fettweis for his contribution of MAR regional climate model outputs (ftp://ftp.climato.be/fettweis/). The data derived in this study are available as a supporting information data set. Publisher Copyright: {\textcopyright}2018. American Geophysical Union. All Rights Reserved.",
year = "2018",
month = nov,
day = "16",
doi = "10.1029/2018GL080455",
language = "English (US)",
volume = "45",
pages = "11,779--11,788",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "American Geophysical Union",
number = "21",
}