Tag Archives: isotopes

Significant Role of Oceans in Onset of Ancient Global Cooling

By Guest PostMay 28, 2011Environmentacc, american midwest, antarctic circumpolar current, antarctic intermediate water, benjamin cramer, benthic foraminifera, bridget wade, candace major, chengjie liu, deep sea drilling project, early cenozoic, environmental conditions, fossil skeletons, glaciations, global climate, global cooling pattern, global ocean circulation, global temperatures, greenhouse climate, icehouse, integrated ocean drilling program, isotopes, late eocene, marsupials, miriam katz, mixmaster of the ocean, ocean drilling program, ocean sediments, oceans, planktonic organisms, polar regions, sea floor, tropical jungles

*Evidence that early Antarctic Circumpolar Current development affected global climate*

Thirty-eight million years ago, tropical jungles thrived in what are now the cornfields of the American Midwest and furry marsupials wandered temperate forests in what is now the frozen Antarctic.

The temperature differences of that era, known as the late Eocene, between the equator and Antarctica were half what they are today. (more…)

Corals Show Ocean Temperature Boundary Rising with Climate Change

By Guest PostOctober 14, 20101 commentEnvironment, Natureandrea grottoli, branwen williams, climate modelers, computer models, coral reef, corals, el niño, global climate, global warming, gorgonian, isotopes, nitrogen 14, nitrogen 15, ocean circulation, oceanography, offshore, ohio state university, pacific decadal oscillation, palau, pdo, satellite data, thermocline, western tropical pacific

WASHINGTON — Researchers looking at corals in the western tropical Pacific Ocean have found signs of a profound shift in the depth where warm surface water and colder deeper water meet—a shift predicted by computer models of global warming.

The finding is the first physical evidence supporting what climate modelers have been predicting as the effects of global climate change on the subsurface ocean circulation. (more…)