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• W4322007529 abstract "&lt;p&gt;The past 5&amp;#8212;10 years have seen a surge in empirically derived geological reconstructions for the high-latitude ice sheets during the last glacial cycle. These reconstructions are often presented in &amp;#8220;time slice&amp;#8221; formats and are beneficial when constraining numerical ice sheet models and paleoclimate datasets (models and proxy records). However, until now there is no equivalent database for high-mountain Asia (HMA). We, therefore, present the first consistently generated reconstruction of paleoglaciers and ice caps, spanning this vast and rugged region, which includes the Himalayas, Tibetan plateau, Pamir, Karakoram, Tian Shan, and the Altai mountains. This reconstruction is based on an extensive meta-analysis of previously published and expert-derived local reconstructions (n=120), which in turn were based on cosmogenic nuclide (Be-10 and Al-26) exposure age data and different mapping and reconstruction methods. Using landforms and sediment to delineate paleoglaciers in regions of rugged relief is often complicated due to geomorphological processes that overlap, obscure, or completely erase the signatures of former ice margins. Therefore, our reconstruction&amp;#8212;the High-mountain Asia Paleoglacier Inventory (HAPI)&amp;#8212;focuses on the glacier &amp;#8220;flow line&amp;#8221;, a simple glacial metric visualizing the trajectory of a hypothetical ice flow vector from the headwall of the catchment to the ice margin limit, constrained downstream by the dated glacial deposit (landform, sediment, or individual erratic clasts). The flow lines describe how long the former glacier was (i.e., glacier length) at a specific point in time and are thus first-order estimates of paleoglacier size. By reconstructing individual glaciers, we can assess their spatial and temporal robustness and compare their timing and relative size changes (compared with the mapped maximum extents), throughout the last glacial cycle, to both high-latitude glacial records and low-latitude monsoon records. Since correlating glacial records across hemispheres or even locally can be a complex task we discuss the foundations for glaciation asynchrony between regions, and across climate transects, by devising time-distance diagrams. Finally, HAPI will be made available for open access through a web interphase featuring downloadable shape file data and will be continuously updated by the authors of the study.&lt;/p&gt;" @default.
• W4322007529 created "2023-02-26" @default.
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• W4322007529 date "2023-02-26" @default.
• W4322007529 modified "2023-10-17" @default.
• W4322007529 title "A new empirical reconstruction of paleoglacier flow lines for the last glacial cycle, spanning high-mountain Asia" @default.
• W4322007529 doi "https://doi.org/10.5194/egusphere-egu23-12675" @default.
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