Climatic control of riverine and Seawater uranium-isotope ratios

L F  Robinson; G M  Henderson; L  Hall; I  Matthews

Climatic control of riverine and Seawater uranium-isotope ratios

L F Robinson
, G M Henderson
, L Hall
, I Matthews

School of Earth Sciences

Research output: Contribution to journal › Article (Academic Journal) › peer-review

126 Citations (Scopus)

Abstract

The large variation in the ratio of uranium-234 to uranium-238 (U-234/U-238) in rivers is not well understood, but may provide information about past weathering and rainfall and is important because it controls seawater (U-234/U-238). Here, we demonstrate the importance of physical weathering and rainfall for (U-234/U-238), using rivers from South Island, New Zealand. These data allow interpretation of an existing speleothem (U-234/U-238) record and suggest that New Zealand glacier advance 13,000 years ago was influenced by increased rainfall rather than by Younger Dryas-like cooling. A model of seawater (U-234/U-238) during glacial cycles indicates that rejection of corals based on modern (U-234/U-238) +/- < 0.01 is not merited and may reject the highest quality ages.

Original language	English
Pages (from-to)	851-854
Number of pages	4
Journal	Science
Volume	305
Issue number	5685
Publication status	Published - 6 Aug 2004

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title = "Climatic control of riverine and Seawater uranium-isotope ratios",

abstract = "The large variation in the ratio of uranium-234 to uranium-238 (U-234/U-238) in rivers is not well understood, but may provide information about past weathering and rainfall and is important because it controls seawater (U-234/U-238). Here, we demonstrate the importance of physical weathering and rainfall for (U-234/U-238), using rivers from South Island, New Zealand. These data allow interpretation of an existing speleothem (U-234/U-238) record and suggest that New Zealand glacier advance 13,000 years ago was influenced by increased rainfall rather than by Younger Dryas-like cooling. A model of seawater (U-234/U-238) during glacial cycles indicates that rejection of corals based on modern (U-234/U-238) +/- < 0.01 is not merited and may reject the highest quality ages.",

author = "Robinson, \{L F\} and Henderson, \{G M\} and L Hall and I Matthews",

year = "2004",

month = aug,

day = "6",

language = "English",

volume = "305",

pages = "851--854",

journal = "Science",

issn = "0036-8075",

publisher = "American Association for the Advancement of Science",

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TY - JOUR

T1 - Climatic control of riverine and Seawater uranium-isotope ratios

AU - Robinson, L F

AU - Henderson, G M

AU - Hall, L

AU - Matthews, I

PY - 2004/8/6

Y1 - 2004/8/6

N2 - The large variation in the ratio of uranium-234 to uranium-238 (U-234/U-238) in rivers is not well understood, but may provide information about past weathering and rainfall and is important because it controls seawater (U-234/U-238). Here, we demonstrate the importance of physical weathering and rainfall for (U-234/U-238), using rivers from South Island, New Zealand. These data allow interpretation of an existing speleothem (U-234/U-238) record and suggest that New Zealand glacier advance 13,000 years ago was influenced by increased rainfall rather than by Younger Dryas-like cooling. A model of seawater (U-234/U-238) during glacial cycles indicates that rejection of corals based on modern (U-234/U-238) +/- < 0.01 is not merited and may reject the highest quality ages.

AB - The large variation in the ratio of uranium-234 to uranium-238 (U-234/U-238) in rivers is not well understood, but may provide information about past weathering and rainfall and is important because it controls seawater (U-234/U-238). Here, we demonstrate the importance of physical weathering and rainfall for (U-234/U-238), using rivers from South Island, New Zealand. These data allow interpretation of an existing speleothem (U-234/U-238) record and suggest that New Zealand glacier advance 13,000 years ago was influenced by increased rainfall rather than by Younger Dryas-like cooling. A model of seawater (U-234/U-238) during glacial cycles indicates that rejection of corals based on modern (U-234/U-238) +/- < 0.01 is not merited and may reject the highest quality ages.

M3 - Article (Academic Journal)

SN - 0036-8075

VL - 305

SP - 851

EP - 854

JO - Science

JF - Science

IS - 5685

ER -

Climatic control of riverine and Seawater uranium-isotope ratios

Abstract

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