Paleotemperatures
Mostrando 1-3 de 3 artigos, teses e dissertações.
-
1. "Methodology for determination of organic geochemistry biomarkers in sediment - Aliphatic hydrocarbons, PAHs, Sterols and Alkenones" / "Metodologia para determinação de biomarcadores geoquímicos orgânicos em sedimentos - Hidrocarbonetos Alifáticos e Aromáticos, Esteróis e Alquenonas"
The fate of most organic matter in the oceans is the marine sediment. This preserved organic matter became an unique reservoir of information about the operation of biogeochemical processes in the geological past, and how these processes responded to environmental changes. Some molecules are only synthesized by sea organisms, others only by higher plants. Th
Publicado em: 2003
-
2. Warmer paleotemperatures for terrestrial ecosystems
Floras of predominantly wet-soil environments show a greater than expected proportion of toothed leaves, affecting the outcome of leaf physiognomically based temperature estimates. New analyses of foliar physiognomy of plants growing in predominantly wet soils in modern forests suggest that current methods of inferring paleotemperatures from fossil floras yi
The National Academy of Sciences.
-
3. Correlated terrestrial and marine evidence for global climate changes before mass extinction at the Cretaceous–Paleogene boundary
Terrestrial climates near the time of the end-Cretaceous mass extinction are poorly known, limiting understanding of environmentally driven changes in biodiversity that occurred before bolide impact. We estimate paleotemperatures for the last ≈1.1 million years of the Cretaceous (≈66.6–65.5 million years ago, Ma) by using fossil plants from North Dakot
The National Academy of Sciences.