@article {5002,
	title = {Measuring and modelling functional moat area in perennially ice-covered Lake Fryxell, Antarctica},
	journal = {Arctic, Antarctic, and Alpine Research},
	volume = {56},
	year = {2024},
	month = {10/2024},
	abstract = {<p>The perennially ice-covered lakes of the McMurdo Dry Valleys (MDVs), Antarctica, are an important reservoir of liquid water in an arid and largely frozen environment. During the austral summer, the margins of these ice covers melt, forming a \&ldquo;moat\&rdquo; of liquid water and thin ice, allowing exchange between lake waters and the atmosphere to occur and serving as an interface between lake, soil, and stream ecosystems. The size of these moats varies from year to year. Here, we have established the first published record of moat area changes at MDVs\&rsquo; Lake Fryxell through time using manual traces of the moat as observed via satellite imagery. We have also tested a semi-automated approach for measuring moat area and found that it consistently underestimated the manual record, which we suspect may be due to the lower spatial resolution of images used in this versus the manual approach. Finally, we developed a predictive model based on readily available climate data, allowing moat area to be predicted beyond the limits of the satellite-based records. We found that functional moat area varies annually, potentially influencing ecosystem processes in the moats.</p>},
	keywords = {LTER-MCM, Lake Fryxell, lake ice, McMurdo Dry Valleys, moat, NDWI, predictive model},
	issn = {1523-0430},
	doi = {10.1080/15230430.2024.2406626},
	url = {https://www.tandfonline.com/doi/full/10.1080/15230430.2024.2406626},
	author = {Stone, Michael S. and Salvatore, Mark R. and Hilary A. Dugan and Myers, Madeline and Peter T. Doran}
}
@phdthesis {4097,
	title = {Geophysics, Water Balance, and History of Thick Perennial Ice Covers on Antarctic Lakes},
	volume = {Ph.D.},
	year = {2014},
	school = {University of Illinois},
	type = {doctoral},
	address = {Chicago, IL},
	abstract = {<p>Antarctic lakes are studied as sentinels of future change, for paleolimnological records contained in the sediments, and as habitats for the simple food webs that can exist in inhospitable environments. Understanding how lakes are formed and are sustained in response to landscape and climate conditions is critical in addressing the aforementioned research themes. This thesis is governed by the overarching hypothesis that an understanding of hydrologic and sediment transport processes associated with lake ice formation and preservation can be used to reveal past climatic changes, and further our awareness of current changes in climate and water balance in the McMurdo Dry Valleys of Antarctica. The first chapter focuses on water loss from closed basin lakes in Taylor Valley, Antarctica, and presents updated estimates of sublimation and ablation rates from long-term empirical measurements. The second and third chapters address the formation of Lake Vida, Antarctica. The former investigates the accretion of a 27 m ice cover, and considers the origin of thick sediment layers in the ice cover, and the latter uses two geophysical methods to quantify the extent and volume of the brine network in the subsurface beneath the lake. The results presented herein advance the study of hydrogeology in continuous permafrost, provide additional evidence for fluctuating climate states in the McMurdo Dry Valleys throughout the mid to late Holocene, and provide a case study for the preservation of water in a cold, desert environment analogous to neighboring planets.</p>},
	keywords = {LTER-MCM, Antarctica, brine, lake ice, McMurdo Dry Valleys, polar lakes, sublimation},
	url = {http://hdl.handle.net/10027/19407},
	author = {Hilary A. Dugan},
	editor = {Peter T. Doran}
}
