Observations of Saharan dust layer electrification

K.A. Nicoll; R.G. Harrison; Z. Ulanowski

doi:10.1088/1748-9326/6/1/014001

Observations of Saharan dust layer electrification

K.A. Nicoll, R.G. Harrison, Z. Ulanowski

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Abstract

Electrification of atmospheric dust influences the coagulation, wet removal and fall speeds of dust particles. Alignment of dust particles can also occur in fair weather atmospheric electrical conditions if the particles are charged. However, very few electrical measurements made in elevated dust layers exist. Balloon-borne charge and particle instrumentation have been used to investigate the electrical properties of elevated Saharan dust layers. Soundings from the Cape Verde Islands, which experience frequent Saharan dust outbreaks, intercepted several dust layers. Two balloon soundings during summer 2009 detected dust particles in layers up to 4 km altitude. Simultaneous electrical measurements showed charge inside the dust layers, with a maximum measured charge density of 25 pC m(-3), sufficient to influence wet removal processes.

Original language	English
Article number	014001
Number of pages	7
Journal	Environmental Research Letters
Volume	6
Issue number	1
DOIs	https://doi.org/10.1088/1748-9326/6/1/014001
Publication status	Published - 2011

Keywords

aerosol electrification
Cape Verde
Martian dust
atmospheric aerosol

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Original article can be found at : http://iopscience.iop.org/ Copyright IOP Publishing. Third parties have the same rights to reuse articles in Envionmental Research Letters as described in the Creative Commons Attribution-Non-Commercial-Share Alike 2.5 license. These open access rights allow third-party users to copy, distribute and display the published version of articles in Envionmental Research Letters, and create derivative works, subject to appropriate attribution and non-commercial exploitation

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title = "Observations of Saharan dust layer electrification",

abstract = "Electrification of atmospheric dust influences the coagulation, wet removal and fall speeds of dust particles. Alignment of dust particles can also occur in fair weather atmospheric electrical conditions if the particles are charged. However, very few electrical measurements made in elevated dust layers exist. Balloon-borne charge and particle instrumentation have been used to investigate the electrical properties of elevated Saharan dust layers. Soundings from the Cape Verde Islands, which experience frequent Saharan dust outbreaks, intercepted several dust layers. Two balloon soundings during summer 2009 detected dust particles in layers up to 4 km altitude. Simultaneous electrical measurements showed charge inside the dust layers, with a maximum measured charge density of 25 pC m(-3), sufficient to influence wet removal processes.",

keywords = "aerosol electrification, Cape Verde, Martian dust, atmospheric aerosol",

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AU - Nicoll, K.A.

AU - Harrison, R.G.

AU - Ulanowski, Z.

N1 - Original article can be found at : http://iopscience.iop.org/ Copyright IOP Publishing. Third parties have the same rights to reuse articles in Envionmental Research Letters as described in the Creative Commons Attribution-Non-Commercial-Share Alike 2.5 license. These open access rights allow third-party users to copy, distribute and display the published version of articles in Envionmental Research Letters, and create derivative works, subject to appropriate attribution and non-commercial exploitation.

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N2 - Electrification of atmospheric dust influences the coagulation, wet removal and fall speeds of dust particles. Alignment of dust particles can also occur in fair weather atmospheric electrical conditions if the particles are charged. However, very few electrical measurements made in elevated dust layers exist. Balloon-borne charge and particle instrumentation have been used to investigate the electrical properties of elevated Saharan dust layers. Soundings from the Cape Verde Islands, which experience frequent Saharan dust outbreaks, intercepted several dust layers. Two balloon soundings during summer 2009 detected dust particles in layers up to 4 km altitude. Simultaneous electrical measurements showed charge inside the dust layers, with a maximum measured charge density of 25 pC m(-3), sufficient to influence wet removal processes.

AB - Electrification of atmospheric dust influences the coagulation, wet removal and fall speeds of dust particles. Alignment of dust particles can also occur in fair weather atmospheric electrical conditions if the particles are charged. However, very few electrical measurements made in elevated dust layers exist. Balloon-borne charge and particle instrumentation have been used to investigate the electrical properties of elevated Saharan dust layers. Soundings from the Cape Verde Islands, which experience frequent Saharan dust outbreaks, intercepted several dust layers. Two balloon soundings during summer 2009 detected dust particles in layers up to 4 km altitude. Simultaneous electrical measurements showed charge inside the dust layers, with a maximum measured charge density of 25 pC m(-3), sufficient to influence wet removal processes.

KW - aerosol electrification

KW - Cape Verde

KW - Martian dust

KW - atmospheric aerosol

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DO - 10.1088/1748-9326/6/1/014001

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VL - 6

JO - Environmental Research Letters

JF - Environmental Research Letters

IS - 1

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Observations of Saharan dust layer electrification

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Keywords

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