Observed latitudinal variations in erosion as a function of glacier dynamics

  title={Observed latitudinal variations in erosion as a function of glacier dynamics},
  author={Mich{\`e}le Koppes and Bernard Hallet and E. Rignot and J{\'e}r{\'e}mie Mouginot and Julia S. Wellner and Katherine V. Boldt},
Glacial erosion is fundamental to our understanding of the role of Cenozoic-era climate change in the development of topography worldwide, yet the factors that control the rate of erosion by ice remain poorly understood. In many tectonically active mountain ranges, glaciers have been inferred to be highly erosive, and conditions of glaciation are used to explain both the marked relief typical of alpine settings and the limit on mountain heights above the snowline, that is, the glacial buzzsaw… Expand
The impact of glaciers on mountain erosion
Glaciers and ice sheets erode mountains and produce vast quantities of sediments that are delivered to rivers and oceans, impacting global sediment and biogeochemical balances. Therefore,Expand
Numerical investigations of subglacial hydrology as a direct and indirect driver of glacial erosion
Glaciers shape high altitude and latitude landscapes in numerous ways. Erosion associated with glacial processes can limit the average height of mountain ranges, while creating the greatest relief onExpand
Plio‐Pleistocene increase of erosion rates in mountain belts in response to climate change
Here, we review an ensemble of observations that point towards a global increase of erosion rates in regions of elevated mountain belts, or otherwise high relief, since the onset of NorthernExpand
The influence of basal-ice debris on patterns and rates of glacial erosion
Abstract Glaciers have played a key role for shaping much of Earth's high topography during the cold periods of the Late Cenozoic. However, despite of their distinct influence on landscapes, theExpand
Climatic controls on mountain glacier basal thermal regimes dictate spatial patterns of glacial erosion
Abstract. Climate has been viewed as a primary control on the rates and patterns of glacial erosion, yet our understanding of the mechanisms by which climate influences glacial erosion is limited. WeExpand
Climatic controls on mountain glacier basal thermal regimes dictate spatial patterns of glacial erosion
  • Jingtao Lai, A. Anders
  • Geology
  • Earth Surface Dynamics
  • 2021
Abstract. Climate has been viewed as a primary control on the rates and patterns of glacial erosion, yet our understanding of the mechanisms by which climate influences glacial erosion is limited. WeExpand
Tectonic controls on rates and spatial patterns of glacial erosion through geothermal heat flux
Abstract Glacial erosion has shaped many mountain belts during the cold periods of the Late Cenozoic. The rate of glacial erosion is sensitive to the subglacial environment, including both theExpand
A glacial buzzsaw effect generated by efficient erosion of temperate glaciers in a steady state model
Abstract Studies on relief and hypsometry in glaciated mountain ranges have recognized the equilibrium line altitude of glaciers as a major control on mountain height. This has led to the beliefExpand
The relative efficiency and influence of glacial and fluvial erosion on Tibetan Plateau landscapes
Abstract Driven by climate change, periods of dominating glacial and fluvial erosion have both sculpted mountain ranges during the Quaternary. To understand the evolution of mountain landforms, thereExpand
Glacial Steady State Topography Controlled by the Coupled Influence of Tectonics and Climate
This work presents a steady state solution for longitudinal profiles along eroding glaciers in a coupled system that includes tectonics and climate and finds that ice surface slope and glacial relief scale with uplift rate with scaling exponents indicating thatglacial relief is less sensitive to uplift rates than relief in most fluvial landscapes. Expand


Global climate and tectonic controls on the denudation of glaciated mountains
Abstract Significant uncertainty exists concerning the efficiency of alpine glacial erosion relative to fluvial and hillslope processes. Latitudinal variations in temperature are important forExpand
The relative efficacy of fluvial and glacial erosion over modern to orogenic timescales
It has been debated whether rivers or glaciers are more effective agents of erosion. A global compilation of erosion rates reveals that both are capable of generating rates of erosion that match orExpand
Glacial hydrology and erosion patterns: A mechanism for carving glacial valleys
article i nfo Article history: Most glacial erosion models assume that erosion rates are proportional to ice-sliding velocity. While recent studies have shown that water plays a major role inExpand
Synchronous acceleration of ice loss and glacial erosion, Glaciar Marinelli, Chilean Tierra del Fuego
Abstract To contribute to the understanding of the influence of climate on glacial erosion and on orogenic processes, we report contemporary glacial erosion rates from a calving glacier in theExpand
Numerically simulating alpine landscapes: The geomorphologic consequences of incorporating glacial erosion in surface process models
Abstract A numerical model that simulates the evolution of glaciated mountain landscapes is presented. By employing a popular, sliding based, glacial erosion model, many common glacial landforms areExpand
Glaciation as a destructive and constructive control on mountain building
The increased height of the orogenic divide at these latitudes leads us to conclude that the southernmost Patagonian Andes represent the first recognized example of regional glacial protection of an active orogen from erosion, leading to constructive growth in orogen height and width. Expand
Numerical modeling of glacial erosion and headwall processes in alpine valleys
Abstract How rock relief is developed by glacial erosion in alpine landscapes is a key question in understanding the controls on mountain range topography. Any generation of relief by glaciers at theExpand
Rates of erosion and sediment evacuation by glaciers: A review of field data and their implications
Abstract Diverse field data on glacial sediment yields are assembled in the context of the current interest in sedimentary basin development in glaciated regions, and in controversial linkagesExpand
Rapid erosion beneath the Greenland ice sheet
The Pleistocene ice sheets left a clear signature of erosion, but the rate at which ice sheets erode is difficult to determine from either paleolandscapes or observations of contemporary processes.Expand
Glacial effects limiting mountain height
A global analysis of topography is used and it is shown that variations in maximum mountain height correlate closely with climate-controlled gradients in snowline altitude for many high mountain ranges across orogenic ages and tectonic styles. Expand