Quantifying the effect of geomorphology on aeolian dust emission potential in northern China
Representation of dust sources remains a key challenge in quantifying the dust cycle and its environmental and climatic impacts. Direct measurements of dust fluxes from different landform types are useful in understanding the nature of dust emission and characterizing the dynamics of soil erodibilit...
| Main Authors: | , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
Wiley
2019
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| _version_ | 1797097036766511104 |
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| author | Cui, M Lu, H Wiggs, GFS Etyemezian, V Sweeney, MR Xu, Z |
| author_facet | Cui, M Lu, H Wiggs, GFS Etyemezian, V Sweeney, MR Xu, Z |
| author_sort | Cui, M |
| collection | OXFORD |
| description | Representation of dust sources remains a key challenge in quantifying the dust cycle and its environmental and climatic impacts. Direct measurements of dust fluxes from different landform types are useful in understanding the nature of dust emission and characterizing the dynamics of soil erodibility. In this study we used the PI‐SWERL® instrument over a seasonal cycle to quantify the potential for PM10 (particles with diameter ≤10 μm) emission from several typical landform types across the Tengger Desert and Mu Us Sandy Land, northern China. Our results indicate sparse grasslands and coppice dunes showed relatively high emission potentials, with emitted fluxes ranging from 10‐1 to 101 mg m‐2 s‐1. These values were up to five times those emitted from sand dunes, and 1‐2 orders of magnitude greater than the emissions from dry lake beds, stone pavements and dense grasslands. Generally, PM10 emission fluxes were seen to peak in the spring months, with significant reductions in summer and autumn (by up to 95%), and in winter (by up to 98%). Variations in soil moisture were likely a primary controlling factor responsible for this seasonality in PM10 emission. Our data provide a relative quantification of differences in dust emission potential from several key landform types. Such data allow for the evaluation of current dust source schemes proposed by prior researchers. Moreover, our data will allow improvements in properly characterizing the erodibility of dust source regions and hence refine the parameterization of dust emission in climate models. |
| first_indexed | 2024-03-07T04:49:56Z |
| format | Journal article |
| id | oxford-uuid:d49b7d7b-6138-4c76-bc2c-77d948e305c0 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T04:49:56Z |
| publishDate | 2019 |
| publisher | Wiley |
| record_format | dspace |
| spelling | oxford-uuid:d49b7d7b-6138-4c76-bc2c-77d948e305c02022-03-27T08:19:52ZQuantifying the effect of geomorphology on aeolian dust emission potential in northern ChinaJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:d49b7d7b-6138-4c76-bc2c-77d948e305c0EnglishSymplectic Elements at OxfordWiley2019Cui, MLu, HWiggs, GFSEtyemezian, VSweeney, MRXu, ZRepresentation of dust sources remains a key challenge in quantifying the dust cycle and its environmental and climatic impacts. Direct measurements of dust fluxes from different landform types are useful in understanding the nature of dust emission and characterizing the dynamics of soil erodibility. In this study we used the PI‐SWERL® instrument over a seasonal cycle to quantify the potential for PM10 (particles with diameter ≤10 μm) emission from several typical landform types across the Tengger Desert and Mu Us Sandy Land, northern China. Our results indicate sparse grasslands and coppice dunes showed relatively high emission potentials, with emitted fluxes ranging from 10‐1 to 101 mg m‐2 s‐1. These values were up to five times those emitted from sand dunes, and 1‐2 orders of magnitude greater than the emissions from dry lake beds, stone pavements and dense grasslands. Generally, PM10 emission fluxes were seen to peak in the spring months, with significant reductions in summer and autumn (by up to 95%), and in winter (by up to 98%). Variations in soil moisture were likely a primary controlling factor responsible for this seasonality in PM10 emission. Our data provide a relative quantification of differences in dust emission potential from several key landform types. Such data allow for the evaluation of current dust source schemes proposed by prior researchers. Moreover, our data will allow improvements in properly characterizing the erodibility of dust source regions and hence refine the parameterization of dust emission in climate models. |
| spellingShingle | Cui, M Lu, H Wiggs, GFS Etyemezian, V Sweeney, MR Xu, Z Quantifying the effect of geomorphology on aeolian dust emission potential in northern China |
| title | Quantifying the effect of geomorphology on aeolian dust emission potential in northern China |
| title_full | Quantifying the effect of geomorphology on aeolian dust emission potential in northern China |
| title_fullStr | Quantifying the effect of geomorphology on aeolian dust emission potential in northern China |
| title_full_unstemmed | Quantifying the effect of geomorphology on aeolian dust emission potential in northern China |
| title_short | Quantifying the effect of geomorphology on aeolian dust emission potential in northern China |
| title_sort | quantifying the effect of geomorphology on aeolian dust emission potential in northern china |
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