Evidence of the largest Late Holocene mountain glacier extent in southern and southeastern Greenland during the middle Neoglacial from 10 Be moraine dating

Boreas ◽  
2021 ◽  
Author(s):  
Melody Biette ◽  
Vincent Jomelli ◽  
Marie Chenet ◽  
Régis Braucher ◽  
Laurie Menviel ◽  
...  
Keyword(s):  
Late Holocene ◽  
Mountain Glacier

scholarly journals Holocene History of Río Tranquilo Glacier, Monte San Lorenzo (47°S), Central Patagonia

2021 ◽  
Vol 9 ◽  
Author(s):  
Esteban A. Sagredo ◽  
Scott A. Reynhout ◽  
Michael R. Kaplan ◽  
Juan C. Aravena ◽  
Paola S. Araya ◽  
...  
Keyword(s):  
Southern Hemisphere ◽  
Northern Hemisphere ◽  
Late Holocene ◽  
Time Frame ◽  
Ice Age ◽  
European Alps ◽  
Mountain Glacier ◽  
The Holocene ◽  
San Lorenzo ◽  
Southern Patagonia

The causes underlying Holocene glacier fluctuations remain elusive, despite decades of research efforts. Cosmogenic nuclide dating has allowed systematic study and thus improved knowledge of glacier-climate dynamics during this time frame, in part by filling in geographical gaps in both hemispheres. Here we present a new comprehensive Holocene moraine chronology from Mt. San Lorenzo (47°S) in central Patagonia, Southern Hemisphere. Twenty-four new 10Be ages, together with three published ages, indicate that the Río Tranquilo glacier approached its Holocene maximum position sometime, or possibly on multiple occasions, between 9,860 ± 180 and 6,730 ± 130 years. This event(s) was followed by a sequence of slightly smaller advances at 5,750 ± 220, 4,290 ± 100 (?), 3,490 ± 140, 1,440 ± 60, between 670 ± 20 and 430 ± 20, and at 390 ± 10 years ago. The Tranquilo record documents centennial to millennial-scale glacier advances throughout the Holocene, and is consistent with recent glacier chronologies from central and southern Patagonia. This pattern correlates well with that of multiple moraine-building events with slightly decreasing net extent, as is observed at other sites in the Southern Hemisphere (i.e., Patagonia, New Zealand and Antarctic Peninsula) throughout the early, middle and late Holocene. This is in stark contrast to the typical Holocene mountain glacier pattern in the Northern Hemisphere, as documented in the European Alps, Scandinavia and Canada, where small glaciers in the early-to-mid Holocene gave way to more-extensive glacier advances during the late Holocene, culminating in the Little Ice Age expansion. We posit that this past asymmetry between the Southern and Northern hemisphere glacier patterns is due to natural forcing that has been recently overwhelmed by anthropogenic greenhouse gas driven warming, which is causing interhemispherically synchronized glacier retreat unprecedented during the Holocene.

Recognition and paleoclimatic implications of late-Holocene glaciation on Mt Taranaki, North Island, New Zealand

The Holocene ◽  
2011 ◽  
Vol 21 (7) ◽  
pp. 1151-1158 ◽  
Author(s):  
Martin S. Brook ◽  
Vince E. Neall ◽  
Robert B. Stewart ◽  
Rob C. Dykes ◽  
Derek L. Birks
Keyword(s):  
New Zealand ◽  
Late Holocene ◽  
Southern Alps ◽  
Time Interval ◽  
The South ◽  
Mountain Glacier ◽  
Climate Fluctuations ◽  
The North ◽  
Spatial Positioning ◽  
The Relationship

Evidence for the timings of inter-hemispheric climate fluctuations during the Holocene is important, with mountain glacier moraine systems routinely used as a proxy for climate. In New Zealand such evidence for glacier expansion during the late Holocene is fragmentary and is limited to glaciers in a narrow zone within the Southern Alps. Here, we present the first evidence for late-Holocene glacier expansion on the North Island of New Zealand in the form of two unconsolidated debris ridges on the south side of the stratovolcano, Mt Taranaki/Mt Egmont, at ~1920 m a.s.l. The two ridges are aligned north–south along the western and eastern sides of a small basin (Rangitoto Flat), which is formed between the main Taranaki cone (to the north), and the parasitic cone of Fanthams Peak (to the south). The approximate age of the ridges is constrained by dated eruptive events and the relationship between ridge locations and the spatial positioning of adjacent volcanic landforms. We propose the ridges formed as two lateral moraines on the margins of a cirque glacier during the final construction phase of Fanthams Peak between 3.3 and 0.5 ka BP, during late-Holocene time. This time interval accords with published cosmogenic 10Be dating of moraine-building episodes in the Southern Alps, indicating the Mt Taranaki moraines are a response to the same regional climatic forcings.

MID-LATE HOLOCENE MEAN TEMPERATURE FLUCTUATIONS OF A WARM PERIOD IN HIGH MOUNTAINS OF THE CENTRAL RUSSIAN ALTAI

2017 ◽  
Vol 5 (4) ◽  
pp. 14-26
Author(s):  
V.P. Galakhov ◽  
◽  
D.V. Chernykh ◽  
E.V. Mardasova ◽  
◽  
...  
Keyword(s):  
Late Holocene ◽  
Temperature Fluctuations ◽  
Warm Period ◽  
High Mountains ◽  
Mean Temperature ◽  
Russian Altai

Late Holocene precipitation and temperature changes in Northern Europe linked with North Atlantic forcing

2015 ◽  
Vol 66 (1) ◽  
pp. 37-48 ◽  
Author(s):  
TP Luoto ◽  
L Nevalainen
Keyword(s):  
North Atlantic ◽  
Late Holocene ◽  
Northern Europe ◽  
Temperature Changes ◽  
Precipitation And Temperature

THE EVOLUTION OF THE BLACK SEA’S COASTAL ZONE OF TAMAN’ PENINSULAR IN THE LATE HOLOCENE

2015 ◽  
pp. 63
Author(s):  
A. V. Porotov ◽  
Yu. V. Gorlov ◽  
T. A. Yanina ◽  
E. Fouache
Keyword(s):  
Coastal Zone ◽  
Late Holocene
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