Journal article icon

Journal article

Climatic control of riverine and seawater uranium-isotope ratios.

Abstract:
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.
Publication status:
Published

Actions


Access Document


Publisher copy:
10.1126/science.1099673

Authors


More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Earth Sciences
Role:
Author


Journal:
Science (New York, N.Y.) More from this journal
Volume:
305
Issue:
5685
Pages:
851-854
Publication date:
2004-08-01
DOI:
EISSN:
1095-9203
ISSN:
0036-8075


Language:
English
Pubs id:
pubs:82200
UUID:
uuid:944fb8a8-3f58-42df-93f7-4a8a213c352a
Local pid:
pubs:82200
Source identifiers:
82200
Deposit date:
2012-12-19

Terms of use



Views and Downloads






If you are the owner of this record, you can report an update to it here: Report update to this record

TO TOP