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An evaluation of snowline data across New Guinea during the last major glaciation, and area-based glacier snowlines in the Mt. Jaya region of Papua, Indonesia, during the Last Glacial Maximum
Prentice M.L.a, Hope G.S.b, Maryunani K.a,c, Peterson J.A.d
a Department of Earth Sciences, Institute for the Study of Earth, Oceans, and Space, University of New Hampshire, United States
b Research School of Pacific and Asian Studies, Australian National University, Australia
c Earth Science Department, Institute Technology Bandung, Indonesia
d Department of Geography and Environmental Science, Monash University, Australia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]Geomorphological mapping and lake-core data from Mt. Jaya, western New Guinea, show that Last Glacial Maximum (LGM) glaciation was less extensive than previously thought. Average equilibrium line altitudes (ELAs), calculated using the area-altitude-balance ratio method, for minimum and maximum ice configurations were 4050±49 and 4000±56 m a.s.l., respectively. This is about 600 m below the ELA of the Mt. Jaya glaciers in 1971-73 and ca 400 m higher than values previously quoted for LGM ELAs in this area. A reappraisal of the evidence used to reconstruct the ELA of glaciers across New Guinea suggests that published chronologies are not sufficient to demonstrate that reported ELAs fall within the LGM window of 21,000±2 yr BP. Furthermore, the published information only constrains the altitude of the ELAs between 3400 and 3800 m a.s.l., not including uncertainty in topography. A simple mass and energy-balance model indicates that an ELA depression of 500 m (i.e., the observed change at Mt. Jaya after adjustment for sea-level change) could be accomplished with 2.5-3 °C of cooling provided precipitation was reduced by 35% and lapse rate changed. This cooling is less than the 6-8 °C cooling inferred from LGM pollen. © 2005 Elsevier Ltd and INQUA. All rights reserved.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1016/j.quaint.2005.02.008[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]