Mid-latitude glacial erosion hotspot related to equatorial shifts in southern Westerlies

Geology ◽  
2015 ◽  
Vol 43 (11) ◽  
pp. 987-990 ◽  
Author(s):  
Frédéric Herman ◽  
Mark Brandon
Keyword(s):  
Glacial Erosion ◽  
Southern Westerlies

APPLICATIONS OF LOW-TEMPERATURE THERMOCHRONOLOGY TO GLACIAL EROSION AND BEDROCK EXHUMATION IN THE CENTRAL TRANSANTARCTIC MOUNTAINS

2020 ◽  
Author(s):  
Bailey Nordin ◽  
◽  
Stephen E. Cox ◽  
Sidney Hemming ◽  
Stuart N. Thomson ◽  
...  
Keyword(s):  
Low Temperature ◽  
Glacial Erosion ◽  
Transantarctic Mountains

Controls of initial topography on temporal and spatial patterns of glacial erosion

Geomorphology ◽  
2014 ◽  
Vol 223 ◽  
pp. 96-116 ◽  
Author(s):  
Vivi K. Pedersen ◽  
Ritske S. Huismans ◽  
Frédéric Herman ◽  
David L. Egholm
Keyword(s):  
Spatial Patterns ◽  
Glacial Erosion ◽  
Temporal And Spatial Patterns ◽  
Temporal And Spatial

Sea level response to Quartenary erosion and deposition in Scandinavia 

2021 ◽  
Author(s):  
Gustav Pallisgaard-Olesen ◽  
Vivi Kathrine Pedersen ◽  
Natalya Gomez
Keyword(s):  
Sea Level ◽  
Sea Level Changes ◽  
Glacial Cycles ◽  
Glacial Erosion ◽  
Erosion And Deposition ◽  
Late Pliocene ◽  
Glacial Origin ◽  
Sediment Deposits ◽  
Mass Redistribution ◽  
Global Sea Level

<div> <p>The landscape in western Scandinavia has undergone dramatic changes through numerous glaciations during the Quaternary. These changes in topography and in the volumes of offshore sediment deposits, have caused significant isostatic adjustments and local sea level changes, owing to erosional unloading and depositional loading of the lithosphere. Mass redistribution from erosion and deposition also has the potential to cause significant pertubations of the geoid, resulting in additional sea-level changes. The combined sea-level response from these processes, is yet to be investigated in detail for Scandinavia.</p> </div><div> <p>In this study we estimate the total sea level change from late-Pliocene- Quaternary glacial erosion and deposition in the Scandinavian region, using a gravitationally self-consistent global sea level model that includes the full viscoelastic response of the solid Earth to surface loading and unloading. In addition to the total late Pliocene-Quaternary mass redistribution, we <span>also </span>estimate transient sea level changes related specifically to the two latest glacial cycles.</p> </div><div> <p>We utilize existing observations of offshore sediment thicknesses of glacial origin, and combine these with estimates of onshore glacial erosion and estimates of erosion on the inner shelf. Based on these estimates, we can define mass redistribution and construct a preglacial landscape setting.</p> </div><div> <p>Our preliminary results show <span>perturbations of</span> the local sea level up to ∼ 200 m since<span> the</span> late-Pliocene in the Norwegian Sea, suggesting that erosion and deposition ha<span>ve</span> influenced the local paleo sea level history in Scandinavia significantly.</p> </div>

scholarly journals Early last glacial maximum in the southern Central Andes reveals northward shift of the westerlies at ~39 ka

2011 ◽  
Vol 7 (1) ◽  
pp. 41-46 ◽  
Author(s):  
R. Zech ◽  
J. Zech ◽  
Ch. Kull ◽  
P. W. Kubik ◽  
H. Veit
Keyword(s):  
Last Glacial Maximum ◽  
Central Andes ◽  
Glacial Maximum ◽  
Atmospheric Co2 ◽  
Dissolved Carbon ◽  
Last Glacial ◽  
Exposure Dating ◽  
Latitudinal Position ◽  
Southern Central ◽  
Southern Westerlies

Abstract. The latitudinal position of the southern westerlies has been suggested to be a key parameter for the climate on Earth. According to the general notion, the southern westerlies were shifted equatorward during the global Last Glacial Maximum (LGM: ~24–18 ka), resulting in reduced deep ocean ventilation, accumulation of old dissolved carbon, and low atmospheric CO2 concentrations. In order to test this notion, we applied surface exposure dating on moraines in the southern Central Andes, where glacial mass balances are particularly sensitive to changes in precipitation, i.e. to the latitudinal position of the westerlies. Our results provide robust evidence that the maximum glaciation occurred already at ~39 ka, significantly predating the global LGM. This questions the role of the westerlies for atmospheric CO2, and it highlights our limited understanding of the forcings of atmospheric circulation.

IV.—On the Origin of the Engadine Lakes

1893 ◽  
Vol 10 (10) ◽  
pp. 448-453
Author(s):  
C. S. Du Riche Preller
Keyword(s):  
Alpine Lakes ◽  
Glacial Erosion ◽  
Opposite Conclusion

Any geologist who, in these days, is still bold enough to affirm that the origin of Alpine Lakes generally is due to glacial erosion, must surely derive considerable comfort from a visit to the Upper Engadine; for the four lakes which adorn that valley appear, at first sight, to constitute so many typical examples of the erosive power of the ancient Inn glacier, and therefore a striking confirmation of that time-honoured theory. A closer and more extensive examination of the physiography of that exceedingly interesting district, leads, however, as in so many similar cases, to a very different, and precisely opposite conclusion.

scholarly journals Glacial Erosion

1876 ◽  
Vol 3 (3) ◽  
pp. 144-144
Author(s):  
George Greenwood
Keyword(s):  
Glacial Erosion
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