A Stable Isotopic Investigation of a Polar Desert Hydrologic System, McMurdo Dry Valleys, Antarctica

Gooseff, M. N.; Lyons, W. Berry; McKnight, Diane M.; Vaughn, Bruce H.; Fountain, Andrew G.; Dowling, Carolyn B.

doi:10.1657/1523-0430(2006)038[0060:asiioa]2.0.co;2

Cited by 66 publications

(106 citation statements)

References 42 publications

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“…1). The isotope composition at depth is similar to that of water of Lake Victoria and its outflow, as well as to meteoric water found in other lakes and streams of lower elevations of the Dry Valleys (Gooseff et al, 2006).…”

Section: Stable Isotope Composition (Dd D 18 O) In Ice Cementsupporting

confidence: 64%

Ground ice recharge via brine transport in frozen soils of Victoria Valley, Antarctica: Insights from modeling δ18O and δD profiles

Hagedorn

Sletten

Hallet

et al. 2010

Geochimica et Cosmochimica Acta

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Section: Stable Isotope Composition (Dd D 18 O) In Ice Cementsupporting

confidence: 64%

Ground ice recharge via brine transport in frozen soils of Victoria Valley, Antarctica: Insights from modeling δ18O and δD profiles

Hagedorn

Sletten

Hallet

et al. 2010

Geochimica et Cosmochimica Acta

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“…However, based on detectable tritium contents in its deep waters, Miller and Aiken (1996) suggested the input of young saline water near the bottom of Lake Fryxell. The water just underneath the ice cover of Lake Fryxell is depleted in 1 H 2 HO by 18% and in H 2 18 O by 2.7% relative to the ice cover (Miller and Aiken 1996), and an average isotopic composition of inflows (glaciers and streams) (Gooseff et al 2006) is close to that of the ice cover (Fig. 11).…”

Section: Mcmurdo Dry Valleysmentioning

confidence: 96%

“…These valleys contain numerous closed-basin, perennially ice-covered lakes and a few ice-free hypersaline lakes (Chinn 1993;Spigel and Priscu 1998). In the last decade, lakes in the Taylor Valley have been extensively studied as part of the U.S. long-term ecological studies (Gooseff et al 2006;Lyons et al 1998a). Ice-covered Lake Hoare and Lake Fryxell in the Taylor Valley show vertical salinity profiles that increase with depth to max ca.…”

Section: Mcmurdo Dry Valleysmentioning

confidence: 99%

“…11). It (Gooseff et al 2006;Matsubaya et al 1979;Miller and Aiken 1996) should be noted that the original data of Lake Vanda on the isotope composition scale (Matsubaya et al 1979) indicate that the deep saline waters were concentrated by the evaporation of water, but the same data expressed on the isotope activity scale show no evaporation trend: the calculated isotope salt effects of Lake Vanda brines (Eq. 3) are up to ?9 and -1.0% for d 2 H and d 18 O values, respectively.…”

Section: Mcmurdo Dry Valleysmentioning

confidence: 99%

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Isotopic Evolution of Saline Lakes in the Low-Latitude and Polar Regions

Horita

2008

Aquat Geochem

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Isotopic fractionations associated with two primary processes (evaporation and freezing of water) are discussed, which are responsible for the formation and evolution of saline lakes in deserts from both low-latitude and the Polar regions. In an evaporative system, atmospheric parameters (humidity and isotopic composition of water vapor) have strong influence on the isotopic behavior of saline lakes, and in a freezing system, salinity build-up largely controls the extent of freezing and associated isotope fractionation. In both systems, salinity has a direct impact on the isotopic evolution of saline lakes. It is proposed that a steady-state ''terminal lake'' model with short-term hydrologic and environmental perturbations can serve as a useful framework for investigating both evaporative and freezing processes of perennial saline lakes. Through re-assessment of own work and literature data for saline lakes, it was demonstrated that effective uses of the isotope activity compositions of brines and salinity-chemistry data could reveal dynamic changes and evolution in the isotopic compositions of saline lakes in response to hydrologic and environmental changes. The residence time of isotopic water molecules in lakes determines the nature of responses in the isotopic compositions following perturbations in the water and isotope balances (e.g., dilution by inflow, water deficit by increased evaporation, and/ or reduction in inflow). The isotopic profiles of some saline lakes from the Polar regions show that they switched the two contrasting modes of operation between evaporative and freezing systems, in response to climate and hydrological changes in the past.

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“…A number of samples of fresh snow or surface snow exhibit negative deuterium excess data, such as about eight samples from traverses (Dahe et al 1994;Frezzotti et al 2005), several samples from Vostok precipitation (Ekaykin et al 2001;Ekaykin 2003), and many samples from the Dry Valleys (Gooseff et al 2006). These data were scrutinized for the observed ␦D-␦ 18 O slope (Fig.…”

Section: Factors Controlling the Deuterium Excess Spatial Distribumentioning

confidence: 99%

A Review of Antarctic Surface Snow Isotopic Composition: Observations, Atmospheric Circulation, and Isotopic Modeling*

et al. 2008

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A database of surface Antarctic snow isotopic composition is constructed using available measurements, with an estimate of data quality and local variability. Although more than 1000 locations are documented, the spatial coverage remains uneven with a majority of sites located in specific areas of East Antarctica. The database is used to analyze the spatial variations in snow isotopic composition with respect to geographical characteristics (elevation, distance to the coast) and climatic features (temperature, accumulation) and with a focus on deuterium excess. The capacity of theoretical isotopic, regional, and general circulation atmospheric models (including "isotopic" models) to reproduce the observed features and assess the role of moisture advection in spatial deuterium excess fluctuations is analyzed.

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A Stable Isotopic Investigation of a Polar Desert Hydrologic System, McMurdo Dry Valleys, Antarctica

Cited by 66 publications

References 42 publications

Ground ice recharge via brine transport in frozen soils of Victoria Valley, Antarctica: Insights from modeling δ18O and δD profiles

Ground ice recharge via brine transport in frozen soils of Victoria Valley, Antarctica: Insights from modeling δ18O and δD profiles

Isotopic Evolution of Saline Lakes in the Low-Latitude and Polar Regions

A Review of Antarctic Surface Snow Isotopic Composition: Observations, Atmospheric Circulation, and Isotopic Modeling*

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