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Status of alkenone paleothermometer calibration : report from Working Group 3
Prahl, F. (Oregon State University. College of Oceanic and Atmospheric Sciences)
Herbert, T. D. (Brown University. Department of Geological Sciences)
Brassell, S. C. (Indiana University. Biogeochemical Laboratories)
Ohkouchi, N. (Woods Hole Oceanographic Institution)
Pagani, M. (University of California. Earth Sciences Department)
Rosell Melé, Antoni (University of Durham. Department of Geography)
Repeta, D. (Woods Hole Oceanographic Institution)
Sikes, E. (University of Auckland. SEMS/Geology)

Data: 2000
Resum: The alkenone unsaturation index, U37K', has now proven its worth as a tool for paleothermometry. U37K' measured in most modern sediments throughout the World Ocean can be translated using established calibrations into realistic, seemingly reliable estimates of mean annual temperature at the sea surface (SST). However, it remains mysterious why water temperature estimates based on this biotic index correspond to "mean annual" SST and whether such estimates apply back in geological time. Solving these mysteries is imperative and will require thoughtful, concerted research effort by the biological, chemical, and geological oceanographic community. This report summarizes what is now known about alkenones, in particular, their use in estimating the growth temperature of specific haptophyte algae that synthesize and export these compounds to the marine sediment record. It highlights future field and laboratory research directions that should be taken to clarify and bolster utility of alkenones as a generally valued paleoceanographic tool.
Drets: Tots els drets reservats.
Llengua: Anglès
Document: Article ; recerca ; Versió publicada
Matèria: Haptophytes ; Alkenones ; Euphotic zone ; Paleothermometer ; Diagenesis ; Sediment record
Publicat a: Geochemistry, geophysics, geosystems, Vol.1, issue 11 (Nov. 2000) , p. 1-13, ISSN 1525-2027

DOI: 10.1029/2000GC000058

13 p, 237.7 KB

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