The Huelmo–Mascardi Cold Reversal (HMCR) is a cooling event in South America between 11,400 and 10,200 14C years BP. This cooling began about 550 years before the Younger Dryas cooling in the Northern Hemisphere, and both periods ended at about the same time.
The HMCR cooling event began with the accentuation of a cooling period which began 12,400 14C yr BP. The 11,400 14C yr BP (13,400 calendar years BP) event onset took place 400–700 years before the onset of the Younger Dryas event. The 10,200 14C yr BP (circa 11,500 cal yr BP) end date is difficult to calibrate to a calendar year because it took place during a radiocarbon age plateau. The end of the HMCR also marked the end of the cooling period.
Referencesedit
Irka Hajdas; Georges Bonani; Patricio I. Moreno; Daniel Ariztegui (2003). "Precise radiocarbon dating of Late-Glacial cooling in mid-latitude South America". Quaternary Research. 59 (1): 70–78. Bibcode:2003QuRes..59...70H. doi:10.1016/S0033-5894(02)00017-0. hdl:10533/174086. S2CID 140136255.
February 16, 2024
huelmo, mascardi, cold, reversal, hmcr, cooling, event, south, america, between, years, this, cooling, began, about, years, before, younger, dryas, cooling, northern, hemisphere, both, periods, ended, about, same, time, event, given, name, from, huelmo, chile,. The Huelmo Mascardi Cold Reversal HMCR is a cooling event in South America between 11 400 and 10 200 14C years BP This cooling began about 550 years before the Younger Dryas cooling in the Northern Hemisphere and both periods ended at about the same time The event was given its name from the Huelmo Chile and Mascardi Lake Argentina Nahuel Huapi National Park sites where it was detected and dated The HMCR cooling event began with the accentuation of a cooling period which began 12 400 14C yr BP The 11 400 14C yr BP 13 400 calendar years BP event onset took place 400 700 years before the onset of the Younger Dryas event The 10 200 14C yr BP circa 11 500 cal yr BP end date is difficult to calibrate to a calendar year because it took place during a radiocarbon age plateau The end of the HMCR also marked the end of the cooling period References editIrka Hajdas Georges Bonani Patricio I Moreno Daniel Ariztegui 2003 Precise radiocarbon dating of Late Glacial cooling in mid latitude South America Quaternary Research 59 1 70 78 Bibcode 2003QuRes 59 70H doi 10 1016 S0033 5894 02 00017 0 hdl 10533 174086 S2CID 140136255 Retrieved from https en wikipedia org w index php title Huelmo Mascardi Cold Reversal amp oldid 1151439734, wikipedia, wiki, book, books, library,
