Climatic control of riverine and seawater uranium-isotope ratios.
The large variation in the ratio of uranium-234 to uranium-238 (234U/238U) in rivers is not well understood, but may provide information about past weathering and rainfall and is important because it controls seawater (234U/238U). Here, we demonstrate the importance of physical weathering and rainfa...
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
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2004
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| _version_ | 1826285739853217792 |
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| author | Robinson, L Henderson, G Hall, L Matthews, I |
| author_facet | Robinson, L Henderson, G Hall, L Matthews, I |
| author_sort | Robinson, L |
| collection | OXFORD |
| description | The large variation in the ratio of uranium-234 to uranium-238 (234U/238U) in rivers is not well understood, but may provide information about past weathering and rainfall and is important because it controls seawater (234U/238U). Here, we demonstrate the importance of physical weathering and rainfall for (234U/238U), using rivers from South Island, New Zealand. These data allow interpretation of an existing speleothem (234U/238U) 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 (234U/238U) during glacial cycles indicates that rejection of corals based on modern (234U/238U) +/- <0.01 is not merited and may reject the highest quality ages. |
| first_indexed | 2024-03-07T01:33:21Z |
| format | Journal article |
| id | oxford-uuid:944fb8a8-3f58-42df-93f7-4a8a213c352a |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T01:33:21Z |
| publishDate | 2004 |
| record_format | dspace |
| spelling | oxford-uuid:944fb8a8-3f58-42df-93f7-4a8a213c352a2022-03-26T23:38:35ZClimatic control of riverine and seawater uranium-isotope ratios.Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:944fb8a8-3f58-42df-93f7-4a8a213c352aEnglishSymplectic Elements at Oxford2004Robinson, LHenderson, GHall, LMatthews, IThe large variation in the ratio of uranium-234 to uranium-238 (234U/238U) in rivers is not well understood, but may provide information about past weathering and rainfall and is important because it controls seawater (234U/238U). Here, we demonstrate the importance of physical weathering and rainfall for (234U/238U), using rivers from South Island, New Zealand. These data allow interpretation of an existing speleothem (234U/238U) 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 (234U/238U) during glacial cycles indicates that rejection of corals based on modern (234U/238U) +/- <0.01 is not merited and may reject the highest quality ages. |
| spellingShingle | Robinson, L Henderson, G Hall, L Matthews, I Climatic control of riverine and seawater uranium-isotope ratios. |
| title | Climatic control of riverine and seawater uranium-isotope ratios. |
| title_full | Climatic control of riverine and seawater uranium-isotope ratios. |
| title_fullStr | Climatic control of riverine and seawater uranium-isotope ratios. |
| title_full_unstemmed | Climatic control of riverine and seawater uranium-isotope ratios. |
| title_short | Climatic control of riverine and seawater uranium-isotope ratios. |
| title_sort | climatic control of riverine and seawater uranium isotope ratios |
| work_keys_str_mv | AT robinsonl climaticcontrolofriverineandseawateruraniumisotoperatios AT hendersong climaticcontrolofriverineandseawateruraniumisotoperatios AT halll climaticcontrolofriverineandseawateruraniumisotoperatios AT matthewsi climaticcontrolofriverineandseawateruraniumisotoperatios |