@article {4031,
	title = {Characterizing hyporheic exchange processes using high-frequency electrical conductivity-discharge relationships on subhourly to interannual timescales},
	journal = {Water Resources Research},
	volume = {53},
	year = {2017},
	month = {05/2017},
	pages = {4124 - 4141},
	abstract = {<p><span style="color: rgb(35, 31, 32); font-family: AdvOT46dcae81; font-size: 9pt;">Concentration-discharge (C-Q) relationships are often used to quantify source water contributions and biogeochemical processes occurring within catchments, especially during discrete hydrological events. Yet, the interpretation of C-Q hysteresis is often confounded by complexity of the critical zone, such as numerous source waters and hydrochemical nonstationarity. Consequently, researchers must often ignore important runoff pathways and geochemical sources/sinks, especially the hyporheic zone because it lacks a distinct hydrochemical signature. Such simplifications limit efforts to identify processes responsible for the transience of C-Q hysteresis over time. To address these limitations, we leverage the hydrologic simplicity and long-term, high-frequency Q and electrical conductivity (EC) data from streams in the McMurdo Dry Valleys, Antarctica. In this two end-member system, EC can serve as a proxy for the concentration of solutes derived from the hyporheic zone. We utilize a novel approach to decompose loops into subhysteretic EC-Q dynamics to identify individual mechanisms governing hysteresis across a wide range of timescales. We find that hydrologic and hydraulic processes govern EC response to diel and seasonal Q variability and that the effects of hyporheic mixing processes on C-Q transience differ in short and long streams. We also observe that variable hyporheic turnover rates govern EC-Q patterns at daily to interannual timescales. Last, subhysteretic analysis reveals a period of interannual freshening of glacial meltwater streams related to the effects of unsteady flow on hyporheic exchange. The subhysteretic analysis framework we introduce may be applied more broadly to constrain the processes controlling C-Q transience and advance understanding of catchment evolution.\&nbsp;</span></p>},
	keywords = {LTER-MCM},
	doi = {10.1002/wrcr.v53.510.1002/2016WR019739},
	url = {http://onlinelibrary.wiley.com/doi/10.1002/2016WR019739/full},
	author = {Singley, Joel G. and Wlostowski, Adam and Bergstrom, Anna J. and Eric R. Sokol and Torrens, Christa L. and Chris Jaros and Wilson, Colleen E. and Hendrickson, Patrick J. and Michael N. Gooseff}
}
@article {1077,
	title = {Characterization of fulvic acid fractions of dissolved organic matter during ice-out in a hyper-eutrophic, coastal pond in Antarctica},
	journal = {Environmental Research Letters},
	volume = {8},
	year = {2013},
	month = {12/2013},
	pages = {045015},
	abstract = {Dissolved humic material (HDOM) is ubiquitous to all natural waters and its source material influences its chemical structure, reactivity, and bioavailability. While terrestrially derived HDOM reference materials distributed by the International Humic Substances Society (IHSS) have been readily available to engineering and scientific communities, a microbially derived reference HDOM was not, despite the well-characterized differences in the chemistry and reactivity of HDOM derived from terrestrial versus microbial sources. To address this gap, we collected a microbial reference fulvic acid from Pony Lake (PLFA) for distribution through the IHSS. Pony Lake is a saline coastal pond on Ross Island, Antarctica, where the landscape is devoid of terrestrial plants. Sample collection occurred over a 17-day period in the summer season at Pony Lake. During this time, the dissolved organic carbon (DOC) concentrations increased nearly two-fold, and the fulvic acid fraction (collected using the XAD-8 method) accounted for 14.6\% of the DOC. During the re-concentration and desalting procedures we isolated two other chemically distinct fulvic acid fractions: (1) PLFA-2, which was high in carbohydrates and (2) PLFA-CER, which was high in nitrogen. The chemical characteristics (elemental analysis, optical characterization with UV{\textendash}vis and fluorescence spectroscopy, and 13C NMR spectroscopy) of the three fulvic acid fractions helped to explain their behavior during isolation.},
	keywords = {LTER-MCM},
	doi = {10.1088/1748-9326/8/4/045015},
	author = {Kaelin M. Cawley and Diane M. McKnight and Penney L. Miller and Rose M. Cory and Fimmen, Ryan L and Guerard, Jennifer and Markus Dieser and Chris Jaros and Yu-Ping Chin and Christine M. Foreman}
}
@mastersthesis {1388,
	title = {Climatic controls on interannual variation in streamflow in Fryxell Basin, Taylor Valley},
	volume = {M.S.},
	year = {2002},
	school = {University of Colorado},
	type = {masters},
	keywords = {LTER-MCM},
	doi = {LTER},
	author = {Chris Jaros}
}
@inbook {1426,
	title = {Climate and hydrologic variations and implications for lake and stream ecological response in the McMurdo Dry Valleys, Antarctica},
	booktitle = {Climate Variability and Ecosystem Response at Long Term Ecological Research Sites},
	year = {2000},
	pages = {174-195},
	publisher = {Oxford University Press},
	organization = {Oxford University Press},
	keywords = {LTER-MCM},
	author = {Kathleen A. Welch and W. Berry Lyons and Diane M. McKnight and Chris Jaros and Andrew G Fountain and Thomas H. Nylen and Peter T. Doran and Clive Howard-Williams},
	editor = {D. Greenland and D. G. Goodin and R. C. Smith}
}
