The relationship of sea level changes to climatic change in northeast Asia and northern North America during the last 75 ka B.P.

Stuart A. Harris; Stuart A. Harris

doi:10.3934/environsci.2019.1.14

AIMS Environmental Science

2019, Volume 6, Issue 1: 14-40. doi: 10.3934/environsci.2019.1.14

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Review

The relationship of sea level changes to climatic change in northeast Asia and northern North America during the last 75 ka B.P.

Stuart A. Harris ^,

Department of Geography, University of Calgary, Alberta, T2A 1E4, Canada

Received: 09 November 2018 Accepted: 02 February 2018 Published: 26 February 2019

The Arctic air mass is the cold, dry body of air slowly moving eastwards around the North Pole in the northern hemisphere. Its southern boundary consists of four planetary waves known as the Rossby waves that mark the interface with subtropical air bringing heat polewards. The Arctic air mass is constantly being modified by the addition of heat and moisture over the oceans, as well as by winter cooling over the land masses due to limited incoming solar radiation and constant reradiation of heat into the atmosphere. The coldest air in winter is located over northeastern Siberia and moves east, cooling Canada. Warm ocean currents add large quantities of heat to the air mass moving over them, but without this addition of heat, the Arctic air mass becomes significantly colder. Research in Tibet and Northeast Asia on depression of sea level shows that during the Late Wisconsin cold event (65–10 ka B.P.), vast quantities of sea water were sequestered on land primarily as ice sheets, exposing the sea bed in the Bering Strait from 50–10 ka B.P. together with the bottom of the South China Sea between 30–20 ka B.P.. The East China Monsoon failed to reach Tibet and much of Northeast China, resulting in severe cooling of northeast Siberia and northern Tibet. This, in turn, caused severe cooling in eastern Canada together with the development of a vast, predominantly cold-based ice sheet. As the sea levels started to rise (about 19 ka B.P.), the East China Monsoon slowly redeveloped and a gradual warming took place on both continents. However, along the west side of the North American Cordillera, the Late Wisconsin glaciation only began in 29 ka B.P. but continued along the west coast until about 10 ka B.P. This paper explores the relationship of the Late Wisconsin history on the two continents, together with the mechanisms causing the landforms and climatic differences. Finally, the probable effects of these climatic changes on the early peopling of North America are discussed.
- Late Wisconsin Glaciation,
- Tibet Plateau,
- Northeast Asian climate,
- North American climate,
- Arctic air mass,
- sea level changes and climate
Citation: Stuart A. Harris. The relationship of sea level changes to climatic change in northeast Asia and northern North America during the last 75 ka B.P.[J]. AIMS Environmental Science, 2019, 6(1): 14-40. doi: 10.3934/environsci.2019.1.14

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Abstract

The Arctic air mass is the cold, dry body of air slowly moving eastwards around the North Pole in the northern hemisphere. Its southern boundary consists of four planetary waves known as the Rossby waves that mark the interface with subtropical air bringing heat polewards. The Arctic air mass is constantly being modified by the addition of heat and moisture over the oceans, as well as by winter cooling over the land masses due to limited incoming solar radiation and constant reradiation of heat into the atmosphere. The coldest air in winter is located over northeastern Siberia and moves east, cooling Canada. Warm ocean currents add large quantities of heat to the air mass moving over them, but without this addition of heat, the Arctic air mass becomes significantly colder. Research in Tibet and Northeast Asia on depression of sea level shows that during the Late Wisconsin cold event (65–10 ka B.P.), vast quantities of sea water were sequestered on land primarily as ice sheets, exposing the sea bed in the Bering Strait from 50–10 ka B.P. together with the bottom of the South China Sea between 30–20 ka B.P.. The East China Monsoon failed to reach Tibet and much of Northeast China, resulting in severe cooling of northeast Siberia and northern Tibet. This, in turn, caused severe cooling in eastern Canada together with the development of a vast, predominantly cold-based ice sheet. As the sea levels started to rise (about 19 ka B.P.), the East China Monsoon slowly redeveloped and a gradual warming took place on both continents. However, along the west side of the North American Cordillera, the Late Wisconsin glaciation only began in 29 ka B.P. but continued along the west coast until about 10 ka B.P. This paper explores the relationship of the Late Wisconsin history on the two continents, together with the mechanisms causing the landforms and climatic differences. Finally, the probable effects of these climatic changes on the early peopling of North America are discussed.

References

[1]	Harris S (2013) Climatic change: Casual correlations over the last 240 Ma. Sci Cold Arid Reg 5: 259–274. doi: 10.3724/SP.J.1226.2013.00259
[2]	Imbrie J, Imbrie J (1980) Modeling climatic response to orbital variations. Science 4: 943–953.
[3]	Jin H, Cheng X, Lou D, et al. (2016) Evolution of permafrost in Northeast China since the Late Pleistocene. Sci Cold Arid Reg 8: 269–296.
[4]	Harris S, Jin, He R, et al. (2018) Tessellons, topography, and glaciations on the Qinghai-Tibet Plateau. Sci Cold Arid Reg 10: 187–206.
[5]	Strahler A (1969) Physical Geography, 3Eds., New York: J. Wiley and Sons.
[6]	Wallen R (1992) Introduction to Physical Geography. Dubuque: Wm. C. Brown Publishers.
[7]	Rossby CG, et al. (1939) Relation between variations in the intensity of the zonal circulation of the atmosphere and the displacements of the semi-permanent centers of action. J Mar Res 2: 38–55. doi: 10.1357/002224039806649023
[8]	Harris S (2010) Climatic change in Western North America during the last 15,000 years: The role of changes in the strengths of air masses in producing the changing climates. Sci Cold Arid Reg 2: 371–383.
[9]	Harris S, Brouchkov A, Cheng G (2017) Geocryology. Characteristics and use of Frozen Ground and Permafrost Landforms, Baton Rouge, Florida: CRC Press.
[10]	Held I (2001) The portioning the tropical of the poleward energy transport between the tropical ocean and atmosphere. J Atmos Sci 58: 943–948. doi: 10.1175/1520-0469(2001)058<0943:TPOTPE>2.0.CO;2
[11]	Farneti R, Vallis G (2013) Meridional energy transport in the coupled atmosphere-ocean system: Compensation and partitioning. J Climate 26: 7151–7165. doi: 10.1175/JCLI-D-12-00133.1
[12]	Kang S, Shin Y, Codron F (2018) The partitioning of poleward energy transport response between the atmosphere and Ekman flux to prescribed surface forcing in a simplified GCM. Geosci Lett 5: 22. doi: 10.1186/s40562-018-0124-9
[13]	Wu CY (1985) Flora Xizancica. Science Press, Volume 5, In Chinese.
[14]	Charkevicz S (1985) Plantae Vasculares Orienttis Sovietici. Leningrad: Nauka, 8 volumes, In Russian.
[15]	Krasnoborov I (1988) Flora Sibirae. Novosibirsk: Nauka. 13 volumes. In Russian.
[16]	Breckle SW, Hedge I, Rafiqpoor M, et al. (2013) Vascular Plants of Afghanistan. Bonn: Scientia Bonnensis.
[17]	Harris S (1982) Cold air drainage west of Fort Nelson, British Columbia. Arctic 35: 537–541.
[18]	NSIDC, New study explains Antarctica's coldest temperatures. 2018. Available from: https://nsidc.org/news/newsroom/new-study-explains-antarctica-coldest-temperatures.
[19]	Arnfield A (2003) Two decades of urban climate research: A review of turbulence, exchanges of energy and water and the heat island. Int J Climatol 23: 1–26. doi: 10.1002/joc.859
[20]	Østrem G (1966) The height of the glaciation limit in southern British Columbia and Alberta. Geogr Ann A 48: 126–138. doi: 10.1080/04353676.1966.11879734
[21]	Sherzer W (1913) Glacial history of the Huron-Erie Basin: Geological report on Wayne County.In: Michigan Geological and Biological Survey, Lansing, Michigan: Wyakoop, Hallenbeck, Crawford Co., State printers Publishers.
[22]	Shackleton N, Hall M, Pate D (1995) Pliocene stable isotope stratigraphy of site 846. Proc Ocean Drill Program: Sci Results 138: 337–353.
[23]	Harris S (1994) Chronostratigraphy of Glaciations and Permafrost episodes in the Cordillera of North America. Prog Phys Geog 18: 366–395. doi: 10.1177/030913339401800305
[24]	Zheng B, Shen Y, Jiao K, et al. (2014) New progress and problems of Quaternary moraine dating in the Tibetan Plateau. Sci Cold Arid Reg 6: 183–189.
[25]	Zhang H, Chang F, Li H, et al. (2018) OSL and AMS ¹⁴C age of the most complete mammoth fossil skeleton from northeastern China and itspaleoclimate significance. Radiocarbon 61: 347–358.
[26]	Vandenburghe J, Wang X, Vandenburghe D (2016) Very large cryoturbation structures of the last permafrost maximum age at the foot of the Qilian Mountains (NE Tibet Plateau, China). Permafrost Periglac 27: 138–143. doi: 10.1002/ppp.1847
[27]	Harris S, Jin H, He R (2017) Very Large cryoturbation structures of last permafrost maximum age at the foot of Qilian Mountains (NE Tibet Plateau, China): A discussion. Permafrost Periglac 28: 757–762. doi: 10.1002/ppp.1942
[28]	Voris H (2000) Maps of Pleistocene sea levels in Southeast Asia: Shorelines, river systems and time durations. J Biogeogr 27: 1153–1167. doi: 10.1046/j.1365-2699.2000.00489.x
[29]	Harris S, Jin H (2012) Tessellons and "sand wedges" on the Qinghai-Tibet Plateau and their palaeoenvironmental implications. Proceedings of the 10^th International Conference on Permafrost, Salekhard, Russia, 1: 147–153.
[30]	Yu L, Lai Z (2012) OSL Chronology and palaeoclimatic implications of aeolian sediments in the eastern Qaidam Basin of the northeastern Qinhai-Tibetan Plateau. Palaeogeogr Palaeocl 337–338: 120–129.
[31]	Liu B, Jin H, Sun L, et al. (2013) Holocene climatic change revealed by aeolian deposits from the Gonghe Basin, northeastern Qinghai-Tibetan Plateau. Quatern Int 296: 231–240. doi: 10.1016/j.quaint.2012.05.003
[32]	Yang S, Jin H (2011) δ¹⁸O and δD records of inactive ice-wedges in Yitulihe, Northeast China and their paleoclimatic implications. Sci China Earth Sci 54: 119–126. doi: 10.1007/s11430-010-4029-5
[33]	Yang S, Cao X, Jin H (2015) Validation of wedge ice isotopes at Yituli'he, northeastern China as climate proxy. Boreas 44: 502–510. doi: 10.1111/bor.12121
[34]	Tarasov P, Bezrukova E, Karabanov E, et al. (2007) Vegetation and climate dynamics during the Holocene and Eemian interglacials derived from Lake Baikal pollen records. Palaeogeogr Palaeocl 252: 440–457. doi: 10.1016/j.palaeo.2007.05.002
[35]	Tarasov P, Bezrukova E, Krivonogov S (2009) Late Glacial and Holocene changes in vegetation cover and climate in Southern Siberia derived from a 15 kyr long pollen record from Lake Kotokel. Clim Past 5: 285–295. doi: 10.5194/cp-5-285-2009
[36]	Murton J, Edwards M, Lozhkin A, et al. (2017) Preliminary paleoenvironmental analysis of permafrost deposits at Batagnika megaslump, Yana Uplands, northeast Siberia. Quaternary Res 87: 314–330. doi: 10.1017/qua.2016.15
[37]	Lozhkin A, Anderson P (2018) Another perspective on the age and origin of the Berelyokh Mammoth site (northeast Siberia). Quaternary Res 9: 1–19.
[38]	Clague J, Curry B, Dreimanis A, et al. (1993) Initiation and development of the Laurentide and Cordilleran Ice Sheets following the last interglaciation. Quat Sci Rev 12: 79–114. doi: 10.1016/0277-3791(93)90011-A
[39]	Prest V (1990) Laurentide ice-flow patterns: A historical review, and implications of the dispersal of Belcher Island erratics. Geogr phys Quatern 44: 113–136.
[40]	Lemke R, Laird W, Tipton M, et al. (1965) Quaternary geology of the Northern Great Plains, In: Wright H.E., Jr., Frey, D.G. Editors, The Quaternary of the United States, Princeton: Princeton University Press, 15–27.
[41]	Koerner R (2010) Glaciers of the Hugh Arctic Islands, In: Williams, R.S., Jr., Ferriguo, J.G. Editors, Satellite Image Atlas of Glaciers of The World, United States Geological Survey Professional Paper, 1486–J–1, J111–J–146.
[42]	Gooding A (1963) Illinoian and Wisconsin Glaciations in the Whitewater Basin, Southeast Indiana, and adjacent areas. J Geo 71: 665–682. doi: 10.1086/626948
[43]	Frye J, Willman H, Black R (1965) Outline of glacial geology of Illinois and Wisconsin. In: Wright H.E., Jr., Frey, D.G. Editors, The Quaternary of the United States, Princeton: Princeton University Press, 43–61.
[44]	Wayne W, Zumberge J (1965) Pleistocene geology of Indiana and Michigan, In: Wright H.E., Jr., Frey, D.G. Editors, The Quaternary of the United States, Princeton: Princeton University Press, 63–83.
[45]	Goldthwait R, Dreimanis A, Forsyth J, et al. (1965) Pleistocene deposits of the Erie Lobe, In: Wright, H.E., Jr., Frey, D.G. Editors, The Quaternary of the United States, Princeton: Princeton University Press, 85–97.
[46]	Teller, JT, Fenton, MM (1980) Late Wisconsin Glacial stratigraphy and history of southeastern Manitoba. Can J Earth Sci 17: 19–35. doi: 10.1139/e80-002
[47]	Christiansen E (1992) Pleistocene stratigraphy of the Saskatoon area, Saskatchewan, Canada: An update. Can J Earth Sci 29: 1767–1778. doi: 10.1139/e92-139
[48]	SkwaraWoolf T (1980) Mammals of the Riddell Local Fauna (Floral Formation, Pleistocene, Late Rancholabrean) Saskatoon, Canada. Saskatoon: Culture and Youth Museum of Natural History, Regina.
[49]	Dyke A (2004) An outline of North American deglaciation with emphasis on Central and northern Canada. In: Ehlers, J., Gibbard P.L. Editors, Quaternary glaciations–Extent and Chronology, Part II. Amsterdam: Elservier Science and Technology Books.
[50]	Barendregt R, Irving E (1998) Changes in the extent of North American ice sheets during the Late Cenozoic. Can J Earth Sci 35: 504–509. doi: 10.1139/e97-126
[51]	Patton H, Hubbard A, Andreassen K, et al. (2017) Deglaciation of the Eurasian ice sheet complex. Quat Sci Rev 169: 148–172. doi: 10.1016/j.quascirev.2017.05.019
[52]	Monegato G, Ravizzi C (2018) The Late Pleistocene multifold glaciation in the Alps: Update and open questions. Alp Mediterr Quat 31: 225–229.
[53]	Patterson C (1998) Laurentide glacial landscapes: The role of ice streams. Geology 26: 643–646. doi: 10.1130/0091-7613(1998)026<0643:LGLTRO>2.3.CO;2
[54]	Dredge L, Thorleifson L (1987) The Middle Wisconsin history of the Laurentide ice sheet. Geogr phys Quatern 41: 215–235.
[55]	Liverman D, Catto N, Rutter N (1989) Laurentide glaciation in west-central Alberta: A single (Late Wisconsinan) event. Can J Earth Sci 26: 266–274. doi: 10.1139/e89-022
[56]	Young R, Burns J, Smith D, et al. (1994) A single, late Wisconsin Laurentide glaciation, Edmonton area and southwestern Alberta. Geology 22: 683–686. doi: 10.1130/0091-7613(1994)022<0683:ASLWLG>2.3.CO;2
[57]	Jackson L, Little E (2004) A single continental glaciation of Rocky Mountain Foothills, south-western Alberta, Canada. Dev Quatern Sci 2: 29–38.
[58]	Andriashek L, Barendregt R (2016) Evidence for Early Pleistocene glaciation from borehole stratigraphy in north-central Alberta, Canada. Can J Earth Sci 54: 445–460.
[59]	Marshall S, Clarke K, Dyke A, et al. (1996) Geologic and topographic controls on fast flow in the Laurentide and Cordilleran ice sheets. J Geophys Res 101: 17827–17839. doi: 10.1029/96JB01180
[60]	Margold M, Stokes C, Clark C (2015) Ice streams in the Laurentide Ice Sheet: Identification, characteristics and comparison to modern ice sheets. Earth-Sci Rev 143: 117–146. doi: 10.1016/j.earscirev.2015.01.011
[61]	Henderson E (1959) Surficial geology of Sturgeon Lake map-area, Alberta. Geol Surv Can Memoir 303.
[62]	Tokarsky O (1967) Geology and groundwater resources (Quaternary) of the Grimshaw area, Alberta (Canada). Unpublished M.Sc. thesis, University of Alberta, Edmonton.
[63]	St. Onge D (1972) La stratigraphie du quaternaire des environs de Fort-Assiniboine, Alberta, Canada. Rev Géogr Montreal 26: 153–163.
[64]	Alley N (1973) Glacial stratigraphy and limits of the Rocky Mountain and Laurentide ice sheets in southwestern Alberta, Canada. B Can Petrol Geol 21: 153–177.
[65]	Alley N, Harris S (1974) Pleistocene Glacial Lake sequence in the Foothills, southwestern Alberta, Canada. Can J Earth Sci 11: 1220–1235. doi: 10.1139/e74-115
[66]	Stalker A (1976) Quaternary stratigraphy of the southwestern Canadian Prairies. In: Mahoney, W.C. Editor, Quaternary Stratigraphy of North America, Strodsberg, Pennsylvania, 381–407.
[67]	Mathews W (1978) Quaternary stratigraphy and geomorphology of Charlie Lake (94A) map area, British Columbia. Geol Surv Can 76–20.
[68]	Duk-Rodkin A, Barendregt R, Tarnocai C, et al. (1995) Late Tertiary to late Quaternary record in the Mackenzie Mountains, Northwest Territories, Canada: Stratigraphy, paleosols, paleomagnetism, and chlorine-36. Can J Earth Sci 33: 875–895.
[69]	Bednarski J, Smith T (2007) Laurentide and montane glaciation along the Rocky Mountain Foothills of northeastern British Columbia. Can J Earth Sci 44: 445–457. doi: 10.1139/e06-095
[70]	Clayton L (1967) Stagnant glacier features of the Missouri Coteau. In: Clayton L., Freers T. Editors, Glacial Geology of the Missouri Coteau and adjacent areas. North Dakota Geological Survey Miscellaneous Papers, 30: 25–46.
[71]	Prest V, Grant D, Rampton V (1968) Glacial Map of Canada. Geological Survey of Canada Map 1253A.
[72]	Ryder J, Fulton R, Clague J (1991) The Cordilleran Ice Sheet and the glacial geomorphology of southern and central British Columbia. Geogr phys Quatern 45: 356–377.
[73]	Fulton R (1991) A conceptual model for growth and decay of the Cordilleran Ice Sheet. Geogr phys Quatern 45: 281–286.
[74]	Nichol C, Monahan P, Fulton R, et al. (2015) Quaternary stratigraphy and evidence for multiple glacial episodes in the north Okanagan valley, British Columbia. Can J Earth Sci 52: 338–356. doi: 10.1139/cjes-2014-0182
[75]	Jackson L, Clague, J (1991) The Cordilleran Ice Sheet: One hundred and fifty years of exploration and discovery. Geogr phys Quatern 45: 269–280.
[76]	Harris S (1985) Evidence for the nature of the early Holocene climate and paleogeography, High Plains, Alberta, Canada. Arct Alp Res 17: 49–67. doi: 10.2307/1550961
[77]	Jackson L (1977) Quaternary stratigraphy and terrain inventory of the Alberta portion of the Kananaskis Lakes 1:250,000 sheet (82-J), Unpublished Ph.D. thesis, University of Calgary, Calgary.
[78]	Jackson L (1980) Glacial history and stratigraphy of the Alberta portion of the Kananaskis Lake map area. Can J Earth Sci 17: 459–477. doi: 10.1139/e80-043
[79]	Borns H (1973) Late Wisconsin fluctuations of the Laurentide ice sheet in southern and eastern New England. Geol Soc Am Bull 139: 37–45.
[80]	Mulligan R, Bajc A (2018) The pre-Late Wisconsin stratigraphy of southern Simcoe County, Ontario: Implications for ice sheet buildup, decay and Great Lakes drainage evolution. Can J Earth Sci 55: 709–729. doi: 10.1139/cjes-2016-0160
[81]	Christiansen E (1979) The Wiscosin deglaciation of southern Saskatchewan and adjacent areas. Can J Earth Sci 16: 913–938. doi: 10.1139/e79-079
[82]	Upham W (1895)The Glacial Lake Agassiz; Monographs of the United States Geological Survey, Volume XXV, Washington.D.C.: Government Printing Office.
[83]	Teller J, Clayton L (1983) Glacial Lake Agassiz. Geological Association of Canada, St. Johns, Newfoundland.
[84]	Teller J (1990) Volume and routing of late-glacial runoff from the southern Laurentide Ice Sheet. Quaternary Res 34: 12–23. doi: 10.1016/0033-5894(90)90069-W
[85]	Fisher, T, Smith D, Andrews J (2002) Preboreal oscillation caused by a glacial Lake Agassiz flood. Quat Sci Rev 21: 873–878. doi: 10.1016/S0277-3791(01)00148-2
[86]	Teller J, Leverington D (2004) Glacial Lake Agassiz: A 5000 yr history of change and its relationship to the δ¹⁸O record of Greenland. GSA Bull 116: 729–742. doi: 10.1130/B25316.1
[87]	Churcher C (1968) Pleistocene ungulates from the Bow River gravels at Cochrane, Alberta. Can J Earth Sci 5: 1467–1488. doi: 10.1139/e68-145
[88]	Churcher C (1975) Additional evidence of Pleistocene ungulates from the Bow River gravels at Cochrane, Alberta. Can J Earth Sci 12: 68–76. doi: 10.1139/e75-008
[89]	Wilson M, Churcher C (1978) Late Pleistocene Camelops from the Gallelli Pit, Calgary, Alberta: Morphology and geologic setting. Can J Earth Sci 15: 729–740. doi: 10.1139/e78-080
[90]	Ritchie J (1976) The Late Quaternary vegetational history of the western interior of Canada. Can J Bot 54: 1793–1818. doi: 10.1139/b76-194
[91]	MacDonald G (1982) Late Quaternary paleoenvironments of the Morley Flats and Kananaskis Valley of southwestern Alberta. Can J Earth Sci 19: 23–35. doi: 10.1139/e82-003
[92]	Gryba EM (1983) Sibbald Creek: 11,000 years of Human Use of the Alberta Foothills. Archaeological Survey of Alberta, Occasional Paper #22.
[93]	Luckman B (1988) 8200-year-old-wood from the Athabasca Glacier, Alberta. Can J Earth Sci 14: 1809–1822.
[94]	Osborn G, Luckman B (1988) Holocene glacier fluctuations in the Canadian (Alberta and British Columbia). Quat Sci Rev 7: 115–128. doi: 10.1016/0277-3791(88)90002-9
[95]	Harris S, Howell J (1977) Chateau Lake Loiuse moraines–evidence for a new Holocene glacial event in southwestern Alberta. B Can Petrol Geol 25: 441–455.
[96]	Zoltai S, Tarnocai C, Pettapiece W (1978) Age of cryoturbated organic materials in earth hummocks from the Canadian Arctic. In: Proceedings of the 3rd International Conference on Permafrost, Edmonton, Alberta. Ottawa, National Research Council of Canada: 326–331.
[97]	Harris S (2002) Biodiversity of the vascular timberline flora in the Rocky Mountains of Alberta, Canada. In: Koerner, C., Spehn, E. Editors, Mountain Biodiversity: A global assessment, Lancashire: Parthenon Publishing group, United Kingdom, 49–57.
[98]	Fontanella F, Feldman C, Siddall M, et al. (2008) Phylogeography of Diadophis puntatus: Extension lineage diversity and repeated patterns of historical demography of a trans-continental snake. Mol Phylogenet Evol 46: 1049–1070. doi: 10.1016/j.ympev.2007.10.017
[99]	Harris S (2012) The role that diastrophism and climatic change have played in determining biodiversity in continental North America. In: Lameed, A. Editor, Biodiversity, Conservation and Utilization in a Diverse World, Intech Press, 233–260.
[100]	Zagura S (1984) The initial peopling of the Americas: an overview from the perspective of physical anthropology. Acta Anthropog 8: 1–21.
[101]	Kitchen A, Miyamoto M, Mulligan C (2008) A three stage colonization model for the peopling of the Americas. PLOS ONE 3: e1596. Available from: Doi.org/10.1371/journal.pone.0001596. doi: 10.1371/journal.pone.0001596
[102]	Fagan B (2016) Searching for the origins of the first Americans. Sapiens.
[103]	Anon (2018) Suspected first trace of Beringian people on the land bridge – now mostly sunken – joining Russia and North America. The Siberian Times.
[104]	Williams R, Steinberg A, Gershowitz H, et al. (1985) GM allotypes in Native Americans: Evidence for three distinct migrations across the Bering land bridge. Am J Phys Anthropol 66: 1–19. doi: 10.1002/ajpa.1330660102
[105]	Goebel T, Waters M, Dikova M (2003) The archaeology of Ushki Lake, Kamchatka, the Pleistocene peopling of the Americas. Science 301: 501–505. doi: 10.1126/science.1086555
[106]	Elias S, Crocker B (2008) The Bering Land Bridge: A moisture barrier to the dispersal of steppe-tundra biota? Quat Sci Rev 27: 2473–2483. doi: 10.1016/j.quascirev.2008.09.011
[107]	Murton J, Goslar T, Edwards M, et al. (2015) Palaeoenvironmental interpretation of Yedoma Silt (Ice Complex) deposition as cold-climate loess, Duvenny Yar, Northeast Siberia. Permafrost and Periglac 26: 208–288. doi: 10.1002/ppp.1843
[108]	Madsen D, Perreault C, Rhode D, et al. (2017) Early foraging settlement of the Tibetan Plateau Highlands. Archaeol Res Asia.
[109]	Sanchez G, Holliday V, Gaines E, et al. (2014) Human (Clovis)–gomphothere (Cuvieronius sp.) association ∼13,390 calibrated yBP in Sonora, Mexico. PNAS 111: 10972–10977.
[110]	Ferring C (2001) The Archaeology and Paleoecology of the Aubrey Clovis Site (41DN479), Denton County, Texas. U.S. Army Corps of Engineers, Fort Worth District. Center for Environmental Archaeology, Department of Geography, University of North Texas.
[111]	Goebel T, Waters M, O'Rourke D (2008) The late Pleistocene dispersal of modern humans in the Americas. Science 319: 1497–1502. doi: 10.1126/science.1153569

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