Arid
DOI10.1002/esp.3315
Contemporary glacigenic inputs to the dust cycle
Bullard, Joanna E.
通讯作者Bullard, Joanna E.
来源期刊EARTH SURFACE PROCESSES AND LANDFORMS
ISSN0197-9337
EISSN1096-9837
出版年2013
卷号38期号:1页码:71-89
英文摘要

The importance of glacigenic dust in the Earth’s system during glacial periods is widely acknowledged. Under contemporary conditions, the world’s largest dust sources are in low-lying, hot, arid regions and this is where most aeolian research is focused. However the processes of dust production and emissions are still operating in cold climate regions, particularly in proglacial areas. This paper assesses current understanding of the relationship between glacierised landscapes and dust emissions and inputs to the global dust cycle. It focuses on how elements in the glacial and aeolian geomorphic sub-systems interact to determine the magnitude, frequency and timing of aeolian dust emissions, and on feedback mechanisms between the systems. Where they have been measured, dust emission intensity and deposition rates in glacierised catchments are very high, in some cases far exceeding those in lower latitudes, however, few studies span long time scales. The impact of future glacier retreat on the balance between sediment supply, availability and aeolian transport capacity and implications for glacigenic dust emissions is also considered. This balance depends on relative spatial and temporal changes in meltwater suspended sediment concentration and wind strengths, which promote dust emissions, and patterns and rates of soil development and vegetation succession on recently-deglaciated terrain which protect sediments from deflation. Retreat of the Antarctic ice sheet could mean that in future glacigenic contributions to the dust cycle exceed those of non-glacigenic sources in the southern hemisphere. Copyright (c) 2012 John Wiley & Sons, Ltd.


英文关键词glacierised landscape dust cycle ice retreat dust deposition
类型Review
语种英语
国家England
收录类别SCI-E ; SSCI
WOS记录号WOS:000313257000007
WOS关键词GREENLAND ICE-SHEET ; SUSPENDED SEDIMENT DYNAMICS ; SOUTHERN-VICTORIA-LAND ; MCMURDO DRY VALLEYS ; HIGH-ARCTIC GLACIER ; AEOLIAN DUST ; WIND EROSION ; DESERT DUST ; PRIMARY SUCCESSION ; EOLIAN SEDIMENT
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向Physical Geography ; Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/176632
作者单位(1)Univ Loughborough, Dept Geog, Loughborough LE11 3TU, Leics, England
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Bullard, Joanna E.. Contemporary glacigenic inputs to the dust cycle[J],2013,38(1):71-89.
APA Bullard, Joanna E..(2013).Contemporary glacigenic inputs to the dust cycle.EARTH SURFACE PROCESSES AND LANDFORMS,38(1),71-89.
MLA Bullard, Joanna E.."Contemporary glacigenic inputs to the dust cycle".EARTH SURFACE PROCESSES AND LANDFORMS 38.1(2013):71-89.
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