Glacial changes
نویسندگان
چکیده
منابع مشابه
Abrupt glacial climate changes due to stochastic resonance.
Using an ocean-atmosphere climate model we demonstrate that stochastic resonance could be an important mechanism for millennial-scale climate variability during glacial times. We propose that the glacial ocean circulation, unlike today's, was an excitable system with a stable and a weakly unstable mode of operation, and that a combination of weak periodic forcing and plausible-amplitude stochas...
متن کاملPyrite sulfur isotopes reveal glacial-interglacial environmental changes.
The sulfur biogeochemical cycle plays a key role in regulating Earth's surface redox through diverse abiotic and biological reactions that have distinctive stable isotopic fractionations. As such, variations in the sulfur isotopic composition (δ34S) of sedimentary sulfate and sulfide phases over Earth history can be used to infer substantive changes to the Earth's surface environment, including...
متن کاملChanges in ocean denitrification during Late Carboniferous glacial–interglacial cycles
Department of Geology, University of Cincinnati, Cincinnati, Ohio 45221-0013, USA Department of Earth and Environmental Sciences, University of Texas at Arlington, Arlington, Texas 76019, USA Center for Applied Energy Research, 2540 Research Park Drive, Lexington, Kentucky 40511, USA Institute for Geology and Mineralogy, University of Cologne, D-50674 Cologne, Germany Barrett Honors College, Ar...
متن کاملChanges in atmospheric variability in a glacial climate
Changes in atmospheric variability in a glacial climate and the impacts on proxy data: a model intercomparison F. S. R. Pausata, C. Li, J. J. Wettstein, K. H. Nisancioglu, and D. S. Battisti Bjerknes Centre for Climate Research, Allegaten 55, 5007 Bergen, Norway Geophysical Institute, University of Bergen, Allegaten 70, 5007 Bergen, Norway Department of Earth Science, University of Bergen, Alle...
متن کاملGlacial/interglacial changes in subarctic north pacific stratification.
Since the first evidence of low algal productivity during ice ages in the Antarctic Zone of the Southern Ocean was discovered, there has been debate as to whether it was associated with increased polar ocean stratification or with sea-ice cover, shortening the productive season. The sediment concentration of biogenic barium at Ocean Drilling Program site 882 indicates low algal productivity dur...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Eos, Transactions American Geophysical Union
سال: 2002
ISSN: 0096-3941
DOI: 10.1029/eo083i025p00274-03