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• W2169196665 abstract "[1] In the McMurdo Dry Valleys, Antarctica, dilute glacial meltwater flows down wellestablished streambeds to closed basin lakes during the austral summer. During the 6–12 week flow season, a hyporheic zone develops in the saturated sediment adjacent to the streams. Longer Dry Valley streams have higher concentrations of major ions than shorter streams. The longitudinal increases in Si and K suggest that primary weathering contributes to the downstream solute increase. The hypothesis that weathering reactions in the hyporheiczonecontrolstreamchemistrywastestedbymodelingthedownstreamincreasein solute concentration in von Guerard Stream in Taylor Valley. The average rates of solute supplied from these sources over the 5.2 km length of the stream were 6.1 � 10 � 9 mol Si L � 1 m � 1 and 3.7 � 10 � 9 mol K L � 1 m � 1 , yielding annual dissolved Si loads of 0.02–1.30 mol Si m � 2 of watershed land surface. Silicate minerals in streambed sediment were analyzed to determine the representative surface area of minerals in the hyporheic zone subject to primary weathering. Two strategies were evaluated to compute sediment surface area normalized weathering rates. The first applies a best linear fit to synoptic data in order to calculate a constant downstream solute concentration gradient, dC/dx (constant weathering rate contribution, CRC method); the second uses a transient storage model to simulate dC/dx, representing both hyporheic exchange and chemical weathering (hydrologic exchange, HE method). Geometric surface area normalized dissolution rates of the silicate minerals in the stream ranged from 0.6 � 10 � 12 mol Si m � 2 s � 1 to 4.5 � 10 � 12 mol Si m � 2 s � 1 and 0.4 � 10 � 12 mol K m � 2 s � 1 to 1.9 � 10 � 12 mol K m � 2 s � 1 . These values are an order of magnitude lower than geometric surface area normalized weathering rates determined in laboratory studies and are an order of magnitude greater than geometric surface area normalized weathering rates determined in a warmer, wetter setting in temperate basins, despite the cold temperatures, lack of precipitation and lack of organic material. These results suggest that the continuous saturation and rapid flushing of the sediment due to hyporheic exchange facilitates weathering in Dry Valley streams. INDEX TERMS: 1045 Geochemistry: Low-temperature geochemistry; 1806 Hydrology: Chemistry of fresh water; 1625 Global Change: Geomorphology and weathering (1824, 1886); 1890 Hydrology: Wetlands; KEYWORDS: hyporheic zone, chemical weathering, flow path, Antarctica, stream" @default.
• W2169196665 created "2016-06-24" @default.
• W2169196665 creator A5007386201 @default.
• W2169196665 creator A5014070015 @default.
• W2169196665 creator A5020861464 @default.
• W2169196665 creator A5033088252 @default.
• W2169196665 date "2002-12-01" @default.
• W2169196665 modified "2023-09-23" @default.
• W2169196665 title "Weathering reactions and hyporheic exchange controls on stream water chemistry in a glacial meltwater stream in the McMurdo Dry Valleys" @default.
• W2169196665 cites W125861080 @default.
• W2169196665 cites W1497575002 @default.
• W2169196665 cites W1553298662 @default.
• W2169196665 cites W171813665 @default.
• W2169196665 cites W1963819325 @default.
• W2169196665 cites W1968171600 @default.
• W2169196665 cites W1968815940 @default.
• W2169196665 cites W1970531672 @default.
• W2169196665 cites W1970790326 @default.
• W2169196665 cites W1970832830 @default.
• W2169196665 cites W1972471355 @default.
• W2169196665 cites W1973479976 @default.
• W2169196665 cites W1977785149 @default.
• W2169196665 cites W1979886740 @default.
• W2169196665 cites W1981719866 @default.
• W2169196665 cites W1985665765 @default.
• W2169196665 cites W1986566273 @default.
• W2169196665 cites W1990518757 @default.
• W2169196665 cites W1991416457 @default.
• W2169196665 cites W1992058558 @default.
• W2169196665 cites W1993083730 @default.
• W2169196665 cites W2002606625 @default.
• W2169196665 cites W2003149889 @default.
• W2169196665 cites W2008101666 @default.
• W2169196665 cites W2012122006 @default.
• W2169196665 cites W2019752542 @default.
• W2169196665 cites W2024548754 @default.
• W2169196665 cites W2024737604 @default.
• W2169196665 cites W2030369144 @default.
• W2169196665 cites W2034707634 @default.
• W2169196665 cites W2035648841 @default.
• W2169196665 cites W2047601379 @default.
• W2169196665 cites W2048129745 @default.
• W2169196665 cites W2048558135 @default.
• W2169196665 cites W2053553925 @default.
• W2169196665 cites W2057025292 @default.
• W2169196665 cites W2059108736 @default.
• W2169196665 cites W2059837978 @default.
• W2169196665 cites W2061794495 @default.
• W2169196665 cites W2067316420 @default.
• W2169196665 cites W2069176072 @default.
• W2169196665 cites W2074684617 @default.
• W2169196665 cites W2076830396 @default.
• W2169196665 cites W2077598381 @default.
• W2169196665 cites W2078956436 @default.
• W2169196665 cites W2082653949 @default.
• W2169196665 cites W2088339896 @default.
• W2169196665 cites W2088642926 @default.
• W2169196665 cites W2089219145 @default.
• W2169196665 cites W2095167314 @default.
• W2169196665 cites W2099081432 @default.
• W2169196665 cites W2100729953 @default.
• W2169196665 cites W2105175928 @default.
• W2169196665 cites W2107531224 @default.
• W2169196665 cites W2111455782 @default.
• W2169196665 cites W2111506015 @default.
• W2169196665 cites W2112504425 @default.
• W2169196665 cites W2125181710 @default.
• W2169196665 cites W2131774932 @default.
• W2169196665 cites W2132769236 @default.
• W2169196665 cites W2133580579 @default.
• W2169196665 cites W2151810991 @default.
• W2169196665 cites W2165221893 @default.
• W2169196665 cites W2167031693 @default.
• W2169196665 cites W2254422920 @default.
• W2169196665 cites W2313817192 @default.
• W2169196665 cites W2334224248 @default.
• W2169196665 cites W2497284130 @default.
• W2169196665 cites W2500699129 @default.
• W2169196665 cites W2899587837 @default.
• W2169196665 cites W2900285257 @default.
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• W2169196665 cites W4245347120 @default.
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• W2169196665 doi "https://doi.org/10.1029/2001wr000834" @default.
• W2169196665 hasPublicationYear "2002" @default.
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