Read Identification and physical retrieval of dust storm using three MODIS thermal IR channels [An article from: Global and Planetary Change]

Identification and physical retrieval of dust storm using three MODIS thermal IR channels [An article from: Global and Planetary Change]

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Description:In this paper, the dust event on 7 April 2001 in northern China is investigated with three MODIS thermal infrared (IR) bands. It is found that for the dust cloud, the observed 11 μm minus 12 μm brightness temperature difference (BTD) is always negative, while the BTD of 8.5 μm minus 11 μm varies from positive to negative depending on the dust concentration. Based on these distinguishing properties, we develop a dust mask algorithm to identify the dust storm occurrence and spatial extent. The algorithm can be used successfully in both the daytime and nighttime. Using the Mie spherical scattering theory, the thermal radiation transfer through the single dust layer is performed with the widely used forward model DISTORT. Our calculations show that the dust-like aerosols can well explain the observed BTD although both of the complex refractive index and particle size of aerosols will significantly influence the BTD. When the complex refractive index is fixed (dust-like aerosols in this paper), then the dust optical thickness and effective radii of dust particles can be retrieved from the brightness temperature (BT) of the 11 μm channel and the BTD of 11 μm minus 12 μm channels, respectively. The integral dust column density can also be derived from the retrieved dust optical thickness and effective radiusWe have made it easy for you to find a PDF Ebooks without any digging. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Identification and physical retrieval of dust storm using three MODIS thermal IR channels [An article from: Global and Planetary Change]. To get started finding Identification and physical retrieval of dust storm using three MODIS thermal IR channels [An article from: Global and Planetary Change], you are right to find our website which has a comprehensive collection of manuals listed.
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Description: In this paper, the dust event on 7 April 2001 in northern China is investigated with three MODIS thermal infrared (IR) bands. It is found that for the dust cloud, the observed 11 μm minus 12 μm brightness temperature difference (BTD) is always negative, while the BTD of 8.5 μm minus 11 μm varies from positive to negative depending on the dust concentration. Based on these distinguishing properties, we develop a dust mask algorithm to identify the dust storm occurrence and spatial extent. The algorithm can be used successfully in both the daytime and nighttime. Using the Mie spherical scattering theory, the thermal radiation transfer through the single dust layer is performed with the widely used forward model DISTORT. Our calculations show that the dust-like aerosols can well explain the observed BTD although both of the complex refractive index and particle size of aerosols will significantly influence the BTD. When the complex refractive index is fixed (dust-like aerosols in this paper), then the dust optical thickness and effective radii of dust particles can be retrieved from the brightness temperature (BT) of the 11 μm channel and the BTD of 11 μm minus 12 μm channels, respectively. The integral dust column density can also be derived from the retrieved dust optical thickness and effective radiusWe have made it easy for you to find a PDF Ebooks without any digging. And by having access to our ebooks online or by storing it on your computer, you have convenient answers with Identification and physical retrieval of dust storm using three MODIS thermal IR channels [An article from: Global and Planetary Change]. To get started finding Identification and physical retrieval of dust storm using three MODIS thermal IR channels [An article from: Global and Planetary Change], you are right to find our website which has a comprehensive collection of manuals listed.
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Identification and physical retrieval of dust storm using three MODIS thermal IR channels [An article from: Global and Planetary Change]

Identification and physical retrieval of dust storm using three MODIS thermal IR channels [An article from: Global and Planetary Change]

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