Holocene glacial oscillations in the Tyroler Valley ( <scp>NE</scp> Greenland)

Although the spatiotemporal oscillations of Greenland Ice Sheet (GrIS) during last millennia have played a prominent role in global environmental changes, its glacial response to natural variability still needs be better constrained. Here, we focused on reconstruction behavior and deglaciation process along Tyroler Valley (74° N, 22° E), within Northeast National Park. This NW-SE valley connects with GrIS via Pasterze Glacier divides two ice caps (A.P. Olsen Land Payer Land), this one feeding piedmont glaciers (Copeland Kløft glaciers). For study, combined interpretation spatial pattern geomorphological features chronological framework defined by new dataset 15 10Be cosmic-ray exposure (CRE) ages from glacially polished bedrock surfaces moraine boulders together optically stimulated luminescence (OSL) age glaciolacustrine deposit. CRE indicate that lowest parts highest slopes took place Early Holocene, at ca. 10–8.5 ka (ka = thousand year [BP]). Furthermore, thinning also favored disconnection tributary glaciers. Samples moraines was not continuous, but it interrupted least three phases advance Neoglacial cooling (before 5.9 ka), Little Age (LIA, 0.6, 0.3 ka). The larger glacier Glacier) occupied floor these major advances, damming river allowing formation proglacial lake upvalley, as confirmed OSL date lacustrine sediments yielded an 0.53 ± 0.06 ka. In short, our study provides evidence relative stability regional area, which fronts been rather stable since their advances LIA.