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• W2022644962 abstract "Easter Island (SE Pacific, 27°S) provides a unique opportunity to reconstruct past climate changes in the South Pacific region based on terrestrial archives. Although the general climate evolution of the south Pacific since the Last Glacial Maximum (LGM) is coherent with terrestrial records in southern South America and Polynesia, the details of the dynamics of the shifting Westerlies, the South Pacific Convergence Zone and the South Pacific Anticyclone during the glacial–interglacial transition and the Holocene, and the large scale controls on precipitation in tropical and extratropical regions remain elusive. Here we present a high-resolution reconstruction of lake dynamics, watershed processes and paleohydrology for the last 34 000 cal yrs BP based on a sedimentological and geochemical multiproxy study of 8 cores from the Raraku Lake sediments constrained by 22 AMS radiocarbon dates. This multicore strategy has reconstructed the sedimentary architecture of the lake infilling and provided a stratigraphic framework to integrate and correlate previous core and vegetation studies conducted in the lake. High lake levels and clastic input dominated sedimentation in Raraku Lake between 34 and 28 cal kyr BP. Sedimentological and geochemical evidences support previously reported pollen data showing a relatively open forest and a cold and relatively humid climate during the Glacial period. Between 28 and 17.3 cal kyr BP, including the LGM period, colder conditions contributed to a reduction of the tree coverage in the island. The coherent climate patterns in subtropical and mid latitudes of Chile and Eastern Island for the LGM (more humid conditions) suggest stronger influence of the Antarctic circumpolar current and an enhancement of the Westerlies. The end of Glacial Period occurred at 17.3 cal kyr BP and was characterized by a sharp decrease in lake level conducive to the development of major flood events and erosion of littoral sediments. Deglaciation (Termination 1) between 17.3 and 12.5 cal kyr BP was characterized by an increase in lake productivity, a decrease in the terrigenous input and a rapid lake level recovery, inaugurating a period of intermediate lake levels, dominance of organic deposition and algal lamination. The timing and duration of deglaciation events in Easter Island broadly agree with other mid- and low-latitude circum South Pacific terrestrial records. The transition to the Holocene was characterized by lower lake levels. The lake level dropped during the early Holocene (ca 9.5 cal kyr BP) and swamp and shallow lake conditions dominated till mid Holocene, partially favored by the infilling of the lacustrine basin. During the mid- to late-Holocene drought phases led to periods of persistent low water table, subaerial exposure and erosion, generating a sedimentary hiatus in the Raraku sequence, from 4.2 to 0.8 cal kyr BP. The presence of this dry mid Holocene phase, also identified in low Andean latitudes and in Patagonian mid latitudes, suggests that the shift of storm tracks caused by changes in the austral summer insolation or forced by “El Niño-like” dominant conditions have occurred at a regional scale. The palm deforestation of the Easter Island, attributed to the human impact could have started earlier, during the 4.2–0.8 cal kyr BP sedimentary gap. Our paleoclimatic data provides insights about the climate scenarios that could favor the arrival of the Polynesian people to the island. If it occurred at ca AD 800 it coincided with the warmer conditions of the Medieval Climate Anomaly, whereas if it took place at ca AD 1300 it was favored by enhanced westerlies at the onset of the Little Ice Age. Changes in land uses (farming, intensive cattle) during the last century had a large impact in the hydrology and limnology (eutrophication) of the lake." @default.
• W2022644962 created "2016-06-24" @default.
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• W2022644962 date "2009-12-01" @default.
• W2022644962 modified "2023-10-11" @default.
• W2022644962 title "Glacial to Holocene climate changes in the SE Pacific. The Raraku Lake sedimentary record (Easter Island, 27°S)" @default.
• W2022644962 cites W1498526448 @default.
• W2022644962 cites W1507180228 @default.
• W2022644962 cites W1571967338 @default.
• W2022644962 cites W1893787057 @default.
• W2022644962 cites W1963567964 @default.
• W2022644962 cites W1963660725 @default.
• W2022644962 cites W1970242590 @default.
• W2022644962 cites W1974438956 @default.
• W2022644962 cites W1975890931 @default.
• W2022644962 cites W1982194750 @default.
• W2022644962 cites W1984996056 @default.
• W2022644962 cites W1985761778 @default.
• W2022644962 cites W1988898629 @default.
• W2022644962 cites W1990669782 @default.
• W2022644962 cites W1991263522 @default.
• W2022644962 cites W1991263619 @default.
• W2022644962 cites W1997473401 @default.
• W2022644962 cites W2002730540 @default.
• W2022644962 cites W2009567657 @default.
• W2022644962 cites W2011184252 @default.
• W2022644962 cites W2012982424 @default.
• W2022644962 cites W2013878295 @default.
• W2022644962 cites W2019111332 @default.
• W2022644962 cites W2024925553 @default.
• W2022644962 cites W2028580413 @default.
• W2022644962 cites W2031240890 @default.
• W2022644962 cites W2035793502 @default.
• W2022644962 cites W2036311734 @default.
• W2022644962 cites W2039666610 @default.
• W2022644962 cites W2042476750 @default.
• W2022644962 cites W2043398939 @default.
• W2022644962 cites W2045419467 @default.
• W2022644962 cites W2046658758 @default.
• W2022644962 cites W2050807683 @default.
• W2022644962 cites W2053037998 @default.
• W2022644962 cites W2053251826 @default.
• W2022644962 cites W2053932421 @default.
• W2022644962 cites W2055359990 @default.
• W2022644962 cites W2061126774 @default.
• W2022644962 cites W2062019088 @default.
• W2022644962 cites W2063966355 @default.
• W2022644962 cites W2064997568 @default.
• W2022644962 cites W2068267715 @default.
• W2022644962 cites W2069921483 @default.
• W2022644962 cites W2074457615 @default.
• W2022644962 cites W2074855967 @default.
• W2022644962 cites W2075682256 @default.
• W2022644962 cites W2076850342 @default.
• W2022644962 cites W2078543926 @default.
• W2022644962 cites W2079655318 @default.
• W2022644962 cites W2081616658 @default.
• W2022644962 cites W2083564881 @default.
• W2022644962 cites W2089605147 @default.
• W2022644962 cites W2093221283 @default.
• W2022644962 cites W2093735098 @default.
• W2022644962 cites W2094221448 @default.
• W2022644962 cites W2103160195 @default.
• W2022644962 cites W2105026619 @default.
• W2022644962 cites W2105213524 @default.
• W2022644962 cites W2108828468 @default.
• W2022644962 cites W2108942072 @default.
• W2022644962 cites W2109690977 @default.
• W2022644962 cites W2112795210 @default.
• W2022644962 cites W2116157750 @default.
• W2022644962 cites W2118141758 @default.
• W2022644962 cites W2123478926 @default.
• W2022644962 cites W2130117805 @default.
• W2022644962 cites W2135839742 @default.
• W2022644962 cites W2140018240 @default.
• W2022644962 cites W2147569451 @default.
• W2022644962 cites W2148211901 @default.
• W2022644962 cites W2154276443 @default.
• W2022644962 cites W2154284281 @default.
• W2022644962 cites W2156924943 @default.
• W2022644962 cites W2173708762 @default.
• W2022644962 cites W2333107914 @default.
• W2022644962 cites W37212900 @default.
• W2022644962 cites W4229944703 @default.
• W2022644962 cites W4231051005 @default.
• W2022644962 cites W4239473832 @default.
• W2022644962 cites W4239930194 @default.
• W2022644962 doi "https://doi.org/10.1016/j.quascirev.2009.06.018" @default.
• W2022644962 hasPublicationYear "2009" @default.
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