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Onset of Asian desertification by 22 Myr ago inferred from loess deposits in China
This new evidence indicates that large source areas of aeolian dust and energetic winter monsoon winds to transport the material must have existed in the interior of Asia by the early Miocene epoch, at least 14 million years earlier than previously thought. Expand
The Anthropogenic Greenhouse Era Began Thousands of Years Ago
The anthropogenic era is generally thought to have begun 150 to 200 years ago, when the industrial revolution began producing CO2 andCH4 at rates sufficient to alter their compositions in theExpand
Pleistocene evolution: Northern hemisphere ice sheets and North Atlantic Ocean
We analyze five high-resolution time series spanning the last 1.65 m.y.: benthic foraminiferal δ18O and δ13O, percent CaCO3, and estimated sea surface temperature (SST) at North Atlantic Deep SeaExpand
Tectonic forcing of late Cenozoic climate
Global cooling in the Cenozoic, which led to the growth of large continental ice sheets in both hemispheres, may have been caused by the uplift of the Tibetan plateau and the positive feedbacksExpand
Late Pliocene variation in northern hemisphere ice sheets and North Atlantic deep water circulation
High-resolution records of δ18O, δ13O, and percent CaCO3 from the late Pliocene North Atlantic (Deep Sea Drilling Project sites 607 and 609) are presented and oxygen isotope stages are formalizedExpand
Holocene carbon emissions as a result of anthropogenic land cover change
Humans have altered the Earth’s land surface since the Paleolithic mainly by clearing woody vegetation first to improve hunting and gathering opportunities, and later to provide agriculturalExpand
Forcing of late Cenozoic northern hemisphere climate by plateau uplift in southern Asia and the American west
Geologic evidence indicates that net vertical uplift occurred on a large (kilometer) scale and at accelerating rates during the middle and late Cenozoic in plateaus of southern Asia and the AmericanExpand
Influence of late Cenozoic mountain building on ocean geochemical cycles
In a steady-state ocean, input fluxes of dissolved salts to the sea must be balanced in mass and isotopic value by output fluxes. For the elements strontium, calcium, and carbon, rivers provide theExpand
Late Quaternary deposition of ice-rafted sand in the subpolar North Atlantic (lat 40° to 65°N)
A major change in the North Atlantic pattern of ice-rafting deposition, during the last interglacial-glacial cycle, occurred approximately 75,000 B.P. Prior to this time, deposition for a period ofExpand
Evolution of Atlantic―Pacific δ13C gradients over the last 2.5 m.y.
The evolution of interocean carbon isotopic gradients over the last 2.5 m.y. is examined using high-resolution δ13C records from deep sea cores in the Atlantic and Pacific Oceans. Over much of theExpand