Tafoni show postglacial and modern wind azimuths that are similar at Bunger Hills

Damian B. Gore; Michelle R. Leishman

doi:10.1017/S095410201900035X

Tafoni show postglacial and modern wind azimuths that are similar at Bunger Hills

Damian B. Gore, Michelle R. Leishman

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

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Abstract

The directions of strong winds are important for the distribution of marine salt spray, rock weathering, lake chemistry and the distribution of vegetation in Bunger Hills, a coastal ice-free oasis in East Antarctica. Present-day strong winds (> 10 m s⁻¹) dominantly blow from 118 ± 21 degrees true (°T; ± 1 SD). Orientated tafoni (weathering pits) might form in bedrock surfaces by salt and ice crystallization, thermal stress and saltating sand particles, recording the orientation of a strongly directional wind field since the last deglaciation, which commenced > 30 000 years ago. The orientations of these tafoni, at 101 ± 18°T for 686 measurements at 28 sites, are indistinguishable from the direction of modern-day strong winds (> 10 m s⁻¹), indicating that the orientation of the slope of the ice sheet has been stable throughout the last 10 000 years during the Holocene.

Original language	English
Pages (from-to)	130-137
Number of pages	8
Journal	Antarctic Science
Volume	32
Issue number	2
DOIs	https://doi.org/10.1017/S095410201900035X
Publication status	Published - Apr 2020

Keywords

biogeography
erosion
Holocene
palaeowind
sea salt

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10.1017/S095410201900035X

Accepted author manuscriptAccepted author manuscript, 1.23 MBLicence: CC BY-NC-ND

Cite this

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title = "Tafoni show postglacial and modern wind azimuths that are similar at Bunger Hills",

abstract = "The directions of strong winds are important for the distribution of marine salt spray, rock weathering, lake chemistry and the distribution of vegetation in Bunger Hills, a coastal ice-free oasis in East Antarctica. Present-day strong winds (> 10 m s−1) dominantly blow from 118 ± 21 degrees true (°T; ± 1 SD). Orientated tafoni (weathering pits) might form in bedrock surfaces by salt and ice crystallization, thermal stress and saltating sand particles, recording the orientation of a strongly directional wind field since the last deglaciation, which commenced > 30 000 years ago. The orientations of these tafoni, at 101 ± 18°T for 686 measurements at 28 sites, are indistinguishable from the direction of modern-day strong winds (> 10 m s−1), indicating that the orientation of the slope of the ice sheet has been stable throughout the last 10 000 years during the Holocene.",

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T1 - Tafoni show postglacial and modern wind azimuths that are similar at Bunger Hills

AU - Gore, Damian B.

AU - Leishman, Michelle R.

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N2 - The directions of strong winds are important for the distribution of marine salt spray, rock weathering, lake chemistry and the distribution of vegetation in Bunger Hills, a coastal ice-free oasis in East Antarctica. Present-day strong winds (> 10 m s−1) dominantly blow from 118 ± 21 degrees true (°T; ± 1 SD). Orientated tafoni (weathering pits) might form in bedrock surfaces by salt and ice crystallization, thermal stress and saltating sand particles, recording the orientation of a strongly directional wind field since the last deglaciation, which commenced > 30 000 years ago. The orientations of these tafoni, at 101 ± 18°T for 686 measurements at 28 sites, are indistinguishable from the direction of modern-day strong winds (> 10 m s−1), indicating that the orientation of the slope of the ice sheet has been stable throughout the last 10 000 years during the Holocene.

AB - The directions of strong winds are important for the distribution of marine salt spray, rock weathering, lake chemistry and the distribution of vegetation in Bunger Hills, a coastal ice-free oasis in East Antarctica. Present-day strong winds (> 10 m s−1) dominantly blow from 118 ± 21 degrees true (°T; ± 1 SD). Orientated tafoni (weathering pits) might form in bedrock surfaces by salt and ice crystallization, thermal stress and saltating sand particles, recording the orientation of a strongly directional wind field since the last deglaciation, which commenced > 30 000 years ago. The orientations of these tafoni, at 101 ± 18°T for 686 measurements at 28 sites, are indistinguishable from the direction of modern-day strong winds (> 10 m s−1), indicating that the orientation of the slope of the ice sheet has been stable throughout the last 10 000 years during the Holocene.

KW - biogeography

KW - erosion

KW - Holocene

KW - palaeowind

KW - sea salt

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JO - Antarctic Science

JF - Antarctic Science

SN - 0954-1020

IS - 2

ER -

Tafoni show postglacial and modern wind azimuths that are similar at Bunger Hills

Abstract

Keywords

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