Influence of the Latitudinal Temperature Gradient on Soil Dust Concentration and Deposition in Greenland
To investigate the effects of changes in the latitudinal temperature gradient and the global mean temperature on dust concentration in the Northern Hemisphere, experiments with the Goddard Institute for Space Studies General Circulation Model (GISS GCM) are performed. The dust concentration over Gre...
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ftnasantrs:oai:casi.ntrs.nasa.gov:20000062896 2023-05-15T16:23:27+02:00 Influence of the Latitudinal Temperature Gradient on Soil Dust Concentration and Deposition in Greenland Rind, David Tegen, Ina Unclassified, Unlimited, Publicly available [2000] application/pdf http://hdl.handle.net/2060/20000062896 unknown Document ID: 20000062896 http://hdl.handle.net/2060/20000062896 No Copyright CASI Geophysics GCN-00-10 2000 ftnasantrs 2019-07-21T07:56:47Z To investigate the effects of changes in the latitudinal temperature gradient and the global mean temperature on dust concentration in the Northern Hemisphere, experiments with the Goddard Institute for Space Studies General Circulation Model (GISS GCM) are performed. The dust concentration over Greenland is calculated from sources in central and eastern Asia, which are integrated on-line in the model. The results show that an increase in the latitudinal temperature gradient increases both the Asian dust source strength and the concentration over Greenland. The source increase is the result of increased surface winds, and to a minor extent, the increase in Greenland dust is also associated with increased northward transport. Cooling the climate in addition to this increased gradient leads to a decrease in precipitation scavenging, which helps produce a further (slight) increase in Greenland dust in this experiment. Reducing the latitudinal gradient reduces the surface wind and hence the dust source, with a subsequent reduction in Greenland dust concentrations. Warming the climate in addition to this reduced gradient leads to a further reduction in Greenland dust due to enhanced precipitation scavenging. These results can be used to evaluate the relationship of Greenland ice core temperature changes to changes in the latitudinal and global temperatures. Other/Unknown Material Greenland Greenland ice core ice core NASA Technical Reports Server (NTRS) Greenland |
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Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
Geophysics |
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Geophysics Rind, David Tegen, Ina Influence of the Latitudinal Temperature Gradient on Soil Dust Concentration and Deposition in Greenland |
topic_facet |
Geophysics |
description |
To investigate the effects of changes in the latitudinal temperature gradient and the global mean temperature on dust concentration in the Northern Hemisphere, experiments with the Goddard Institute for Space Studies General Circulation Model (GISS GCM) are performed. The dust concentration over Greenland is calculated from sources in central and eastern Asia, which are integrated on-line in the model. The results show that an increase in the latitudinal temperature gradient increases both the Asian dust source strength and the concentration over Greenland. The source increase is the result of increased surface winds, and to a minor extent, the increase in Greenland dust is also associated with increased northward transport. Cooling the climate in addition to this increased gradient leads to a decrease in precipitation scavenging, which helps produce a further (slight) increase in Greenland dust in this experiment. Reducing the latitudinal gradient reduces the surface wind and hence the dust source, with a subsequent reduction in Greenland dust concentrations. Warming the climate in addition to this reduced gradient leads to a further reduction in Greenland dust due to enhanced precipitation scavenging. These results can be used to evaluate the relationship of Greenland ice core temperature changes to changes in the latitudinal and global temperatures. |
format |
Other/Unknown Material |
author |
Rind, David Tegen, Ina |
author_facet |
Rind, David Tegen, Ina |
author_sort |
Rind, David |
title |
Influence of the Latitudinal Temperature Gradient on Soil Dust Concentration and Deposition in Greenland |
title_short |
Influence of the Latitudinal Temperature Gradient on Soil Dust Concentration and Deposition in Greenland |
title_full |
Influence of the Latitudinal Temperature Gradient on Soil Dust Concentration and Deposition in Greenland |
title_fullStr |
Influence of the Latitudinal Temperature Gradient on Soil Dust Concentration and Deposition in Greenland |
title_full_unstemmed |
Influence of the Latitudinal Temperature Gradient on Soil Dust Concentration and Deposition in Greenland |
title_sort |
influence of the latitudinal temperature gradient on soil dust concentration and deposition in greenland |
publishDate |
2000 |
url |
http://hdl.handle.net/2060/20000062896 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice core ice core |
genre_facet |
Greenland Greenland ice core ice core |
op_source |
CASI |
op_relation |
Document ID: 20000062896 http://hdl.handle.net/2060/20000062896 |
op_rights |
No Copyright |
_version_ |
1766011707734360064 |