Basic Satellite Imagery Interpretation

The University Corporation for Atmospheric Research, 2017

This lesson teaches the basics of satellite image interpretation to forecasters, meteorology students, and other interested learners, with an emphasis on the African region. It begins by briefly describing visible, infrared, and water vapour channels, as well as RGBs and derived products. From there, it teaches learners how to interpret clouds and surface features using various channels and products. This sets the stage for the final section, where learners practice identifying features using assorted imagery and products. The lesson uses Meteosat Second Generation imagery over Africa and, to ...

English

 Basic Satellite Imagery Interpretation

 Available online: https://www.meted.ucar.edu/training_module.php?id=1316

Published by: The University Corporation for Atmospheric Research ; 2017

This lesson teaches the basics of satellite image interpretation to forecasters, meteorology students, and other interested learners, with an emphasis on the African region. It begins by briefly describing visible, infrared, and water vapour channels, as well as RGBs and derived products. From there, it teaches learners how to interpret clouds and surface features using various channels and products. This sets the stage for the final section, where learners practice identifying features using assorted imagery and products. The lesson uses Meteosat Second Generation imagery over Africa and, to a lesser extent, Europe. Given the similarities in channels between satellites, the lesson should also appeal to a broader, international audience. This lesson is being designed to support EUMETSAT training courses, such as the online Satellite Application Courses run by EUMETSAT and the African training centers.

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Language(s): English

Format: Digital (Standard Copyright)

Tags: Satellite ; Weather forecasting ; Lesson/ Tutorial ; Water vapour ; Satellite Skills and Knowledge for Operational Meteorologists Add tag

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Statistical analysis of rainfall trend and water vapor distribution over the Central African Republic

Gba-Gombo Jovial - China Meteorological Admistration, 2016

To apprehend the temporal and spatial distribution of the rainfall over CAR, we computed thirty-three years (1981-2013) of monthly rainfall, relative humidity over the country divided into four (4) distinct sub-regions. Bearing different characteristics one to another, we found that Region 2 and Region 4 were having a statistical significant upward trend along the long term rainfall variation; meanwhile Region 3 was the one having a highest coefficient of variation on the yearly basis. The composite analysis showed that December, January and February were the months with higher frequency of va ...

English

 Statistical analysis of rainfall trend and water vapor distribution over the Central African Republic

Jovial Gba-Gombo

Published by: China Meteorological Admistration ; 2016

To apprehend the temporal and spatial distribution of the rainfall over CAR, we computed thirty-three years (1981-2013) of monthly rainfall, relative humidity over the country divided into four (4) distinct sub-regions. Bearing different characteristics one to another, we found that Region 2 and Region 4 were having a statistical significant upward trend along the long term rainfall variation; meanwhile Region 3 was the one having a highest coefficient of variation on the yearly basis. The composite analysis showed that December, January and February were the months with higher frequency of variation compared to June, July, August and September having the least frequency variation(by decreasing magnitude respectively) and the years 1984 and 2009 to be of a great magnitude in the Dry year composite just as 1988 and 2013 for the Wet years.

Notes: If you wish to download the full text, please contact the author (dadjataro(at)gmail.com) or library(at)wmo.int (Please replace (at) by @).

Language(s): English

Format: Digital (Available online for logged-in users)

Tags: Precipitation ; Water vapour ; Central African Republic ; Thesis - WMO Fellowship Division Add tag

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Microphysical and radiative effects of aerosols on warm clouds during the Amazon biomass burning season as observed by MODIS: impacts of water vapor and land cover

Atmospheric Chemistry and Physics (ACP), Vol. 11. N° 7. Ten Hoeve J.E.; Remer L.A.; Jacobson M.Z. - Copernicus GmbH, 2011

Aerosol, cloud, water vapor, and temperature profile data from the Moderate Resolution Imaging Spectroradiometer (MODIS) are utilized to examine the impact of aerosols on clouds during the Amazonian biomass burning season in Rondônia, Brazil. It is found that increasing background column water vapor (CWV) throughout this transition season between the Amazon dry and wet seasons likely exerts a strong effect on cloud properties. As a result, proper analysis of aerosol-cloud relationships requires that data be stratified by CWV to account better for the influence of background meteorological vari ...

English

[article] 

Microphysical and radiative effects of aerosols on warm clouds during the Amazon biomass burning season as observed by MODIS: impacts of water vapor and land cover

  Available online: http://dx.doi.org/10.5194/acp-11-3021-2011

J.E. Ten Hoeve ; L.A. Remer ; M.Z. Jacobson

in Atmospheric Chemistry and Physics (ACP) > Vol. 11. N° 7 [04/01/2011] . - p.3021-3036

Aerosol, cloud, water vapor, and temperature profile data from the Moderate Resolution Imaging Spectroradiometer (MODIS) are utilized to examine the impact of aerosols on clouds during the Amazonian biomass burning season in Rondônia, Brazil. It is found that increasing background column water vapor (CWV) throughout this transition season between the Amazon dry and wet seasons likely exerts a strong effect on cloud properties. As a result, proper analysis of aerosol-cloud relationships requires that data be stratified by CWV to account better for the influence of background meteorological variation. Many previous studies of aerosol-cloud interactions over Amazonia have ignored the systematic changes to meteorological factors during the transition season, leading to possible misinterpretation of their results. Cloud fraction (CF) is shown to increase or remain constant with aerosol optical depth (AOD), depending on the value of CWV, whereas the relationship between cloud optical depth (COD) and AOD is quite different. COD increases with AOD until AOD ~ 0.3, which is assumed to be due to the first indirect (microphysical) effect. At higher values of AOD, COD is found to decrease with increasing AOD, which may be due to: (1) the inhibition of cloud development by absorbing aerosols (radiative effect/semi-direct effect) and/or (2) a possible retrieval artifact in which the measured reflectance in the visible is less than expected from a cloud top either from the darkening of clouds through the addition of carbonaceous biomass burning aerosols within or above clouds or subpixel dark surface contamination in the measured cloud reflectance. If (1) is a contributing mechanism, as we suspect, then an empirically-derived increasing function between cloud drop number and aerosol concentration, assumed in a majority of global climate models, is inaccurate since these models do not include treatment of aerosol absorption in and around clouds. The relationship between aerosols and both CWV and clouds over varying land surface types is also analyzed. The study finds that the difference in CWV between forested and deforested land is not correlated with aerosol loading, supporting the assumption that temporal variation of CWV is primarily a function of the larger-scale meteorology. However, a difference in the response of CF to increasing AOD is observed between forested and deforested land. This suggests that dissimilarities between other meteorological factors, such as atmospheric stability, may have an impact on aerosol-cloud correlations between different land cover types.

Language(s): English

Format: Digital (Free)

Tags: Aerosols ; Amazon ; Biomass ; Warm cloud ; Observations ; Water vapour ; Region III - South America Add tag

[article] 

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IOM Report, 92. National/Regional Procedures of GPS Water Vapour Networks and Agreed International procedures

World Meteorological Organization (WMO) - WMO, 2006 (WMO/TD-No. 1340)

English

 National/Regional Procedures of GPS Water Vapour Networks and Agreed International procedures

 PDF 

World Meteorological Organization (WMO)

Published by: WMO ; 2006

Collection(s) and Series: WMO/TD- No. 1340; IOM Report- No. 92

Language(s): English

Format: CD, DVD, Digital (Free)

Tags: Observations ; Meteorological instrument ; Water vapour ; Instruments and Methods of Observation Programme (IMOP) ; IOM 92 Add tag

in

 CD-Rom (12 Instruments and Observing Methods Reports) (2006) 

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La vapeur d'eau : recueil de notes sur les appareils de mesure

Organisation météorologique mondiale (OMM); Centre régional de formation et d'application en agrométéorologie et hydrologie opérationnelle ; Programme des Nations Unies pour le Développement (PNUD) - OMM, 1984

French

 La vapeur d'eau: recueil de notes sur les appareils de mesure

Organisation météorologique mondiale ; Centre régional de formation et d'application en agrométéorologie et hydrologie opérationnelle ; Programme des Nations Unies pour le Développement

Published by: OMM ; 1984

Language(s): French

Format: Hard copy

Tags: Observations ; Water vapour ; Measure ; Hydrometeorological instrument Add tag

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Operational hydrology report (OHR), 11. Hydrological application of atmospheric vapour-flux analysis

World Meteorological Organization (WMO) - WMO, 1977 (WMO-No. 476)

English

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