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the polarity reversal...

Do terrestrial geomagnetic field reversals have an effect on Earth s climate? Cooper et al.created a precisely dated radiocarbon record around the time of the Laschamps geomagnetic reversal about 41,000 years ago from the rings of New Zealand swamp kauri trees. This record reveals a substantial increase in the carbon-14 content of the atmosphere culminating during the period of weakening magnetic field strength preceding the polarity switch. The authors modeled the consequences of this event and concluded that the geomagnetic field minimum caused substantial changes in atmospheric ozone concentration that drove synchronous global climate and environmental shifts.

Geological archives record multiple reversals of Earth’s magnetic poles, but the global impacts of these events, if any, remain unclear. Uncertain radiocarbon calibration has limited investigation of the potential effects of the last major magnetic inversion, known as the ....

Clermont Ferrand , United States , New Zealand , Western Cape , South Africa , New Zealand General , Ha Afon , Conard Bolus , Douglas Adams , Chris Turney , University Of New South Wales , Australian Research Council , Tel Aviv University , Last Glacial , Last Glacial Period , Adams Event , Adams Transitional Geomagnetic Event , Laschamps Excursion , Grand Solar Minima , North Pole , Pacific Basin , North America , Laurentide Ice Sheet , Atlantic Basin , Maunder Minima , Hulu Cave ,

Research suggests North America first populated by 'stepping stone' migration across Bering Sea

Thu, 04/29/2021
LAWRENCE For thousands of years during the last ice age, generations of maritime migrants paddled skin boats eastward across shallow ocean waters from Asia to present-day Alaska. They voyaged from island to island and ultimately to shore, surviving on bountiful seaweeds, fish, shellfish, birds and game harvested from coastal and nearshore biomes. Their island-rich route was possible due to a shifting archipelago that stretched almost 900 miles from one continent to the other.
A new study from the University of Kansas in partnership with universities in Bologna and Urbino, Italy, documents the newly named Bering Transitory Archipelago and then points to how, when and where the first Americans may have crossed. The authors’ stepping-stones hypothesis depends on scores of islands that emerged during the last ice age as sea level fell when ocean waters were locked in glaciers and later rose when ice sheets melted. The two-part study, just published in the o ....

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Was North America populated by 'stepping stone' migration across Bering Sea?

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VIDEO: A paleotopographic reconstruction accounting for Glacial Isostatic Adjustment digitally explores an archipelago about 1400 km long that likely existed from 30,000 BP to 8000 BP.
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Credit: Dobson, et al
LAWRENCE For thousands of years during the last ice age, generations of maritime migrants paddled skin boats eastward across shallow ocean waters from Asia to present-day Alaska. They voyaged from island to island and ultimately to shore, surviving on bountiful seaweeds, fish, shellfish, birds and game harvested from coastal and nearshore biomes. Their island-rich route was possible due to a shifting archipelago that stretched almost 900 miles from one continent to the other. ....

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Research suggests North America first populated by 'stepping stone' migration across Bering Sea

Research suggests North America first populated by 'stepping stone' migration across Bering Sea
ku.edu - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from ku.edu Daily Mail and Mail on Sunday newspapers.

United States , Bering Strait , Jerome Dobson , Neil Armstrong , Gaia Galassi , Rachel Carson , Giorgio Spada , Bering Sea , University Of Kansas , American Geographical Society Cullum Medal , University Of Bologna , Urbino University Carlo Bo , Bering Transitory Archipelago , Comptes Rendus Geoscience , Fen Montaigne , Last Glacial Maximum , Beringian Standstill Hypothesis , Native American , American Geographical Society , Cullum Geographical Medal , Late Pleistocene , Urbino University , Glacial Isostatic Adjustment , Last Glacial , ஒன்றுபட்டது மாநிலங்களில் , பெரிங் சங்கடமான ,

Recolonisation of Europe after the last ice age started earlier than previously thought -- Secret History -- Sott.net

© G. Oxilia
A study that appeared today on Current Biology sheds new light on the continental migrations which shaped the genetic background of all present Europeans.A study that appeared today in
Current Biology sheds new light on the continental migrations which shaped the genetic background of all present Europeans. The research generates new ancient DNA evidence and direct dating from a fragmentary fossil mandible belonging to an individual who lived ~17,000 years ago in northeastern Italy (Riparo Tagliente, Verona). The results backdate by about 3,000 years the diffusion in Southern Europe of a genetic component linked to Eastern Europe/Western Asia previously believed to have spread westwards during later major warming shifts. ....

Stefano Benazzi , Sahra Talamo , Gregorio Oxilia , Riparo Tagliente , Luca Pagani University Of Padova , Eugenio Bortolini University Of Bologna , University Of Bologna , Current Biology , Southern Europe , Western Asia , Last Glacial , Southern European Hunter Gatherers , Eugenio Bortolini , Last Glacial Maximum , Luca Pagani , Pearly Alpine , Late Glacial Europe , பல்கலைக்கழகம் ஆஃப் போலோக்னா , தற்போதைய உயிரியல் , தெற்கு யூரோப் , மேற்கு ஆசியா , கடந்த பனிப்பாறை , கடந்த பனிப்பாறை அதிகபட்சம் , லூகா பாகணி ,