dc.contributor.author |
Botai, OJ
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dc.contributor.author |
Sivakumar, V
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dc.contributor.author |
Combrinck, CL
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dc.contributor.author |
Rautenbach, CJD
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dc.date.accessioned |
2009-07-14T07:47:22Z |
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dc.date.available |
2009-07-14T07:47:22Z |
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dc.date.issued |
2009 |
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dc.identifier.citation |
Botai, OJ, Sivakumar, V, Combrinck, CL and Rautenbach, CJD. 2009. Multi-scale organization of water vapor over low and mid-tropical Africa. Advances in Geosciences, pp 11 |
en |
dc.identifier.issn |
1680-7340 |
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dc.identifier.uri |
http://hdl.handle.net/10204/3497
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dc.description |
Advances in Geosciences is an Open Access Journal for refereed proceedings and special publications |
en |
dc.description.abstract |
In this study, data from the Southern Hemisphere ADditional OZonesondes (SHADOZ) are used to compute the spatially averaged water vapour (WVg) over low and mid-tropical Africa. Based on the SHADOZ stations, reanalysis data from the National Centres for Environmental Prediction and Atmospheric Research (NCEP/NCAR) were partitioned into four grid cells: (1) over Ascension [10.0°S to 7.5°S, 12.5°W to 15.0°W]; (2) Nairobi [0.0° N to 2.5°S, 35.0°E to 37.5°E]; (3) Irene [27.5°S to 25.0°S, 27.5°E to 30.0°E] and (4) Reunion [22.5° S to 20.0° S, 55.0° E to 57.5°E]. The mean Water Vapour (WV) was computed over these grid cells to obtain (WVg). The temporal scales of WVg fluctuations have been analyzed using wavelet transforms and Principal Components. Analysis (PCA) of the WVg wavelet-transformed coefficients was used to demonstrate spatial organization of WV. The results indicate that WV exhibits localized spatial coherence patterns.
Further, the analysis show strong seasonal dependence of WV which is associated with global and local atmospheric circulation |
en |
dc.language.iso |
en |
en |
dc.publisher |
Copernicus Publications |
en |
dc.subject |
Water vapor |
en |
dc.subject |
Greenhouse gas |
en |
dc.subject |
Southern Hemisphere ADditional OZonesondes |
en |
dc.subject |
SHADOZ |
en |
dc.subject |
Tropical Africa |
en |
dc.title |
Multi-scale organization of water vapor over low and mid-tropical Africa |
en |
dc.type |
Article |
en |
dc.identifier.apacitation |
Botai, O., Sivakumar, V., Combrinck, C., & Rautenbach, C. (2009). Multi-scale organization of water vapor over low and mid-tropical Africa. http://hdl.handle.net/10204/3497 |
en_ZA |
dc.identifier.chicagocitation |
Botai, OJ, V Sivakumar, CL Combrinck, and CJD Rautenbach "Multi-scale organization of water vapor over low and mid-tropical Africa." (2009) http://hdl.handle.net/10204/3497 |
en_ZA |
dc.identifier.vancouvercitation |
Botai O, Sivakumar V, Combrinck C, Rautenbach C. Multi-scale organization of water vapor over low and mid-tropical Africa. 2009; http://hdl.handle.net/10204/3497. |
en_ZA |
dc.identifier.ris |
TY - Article
AU - Botai, OJ
AU - Sivakumar, V
AU - Combrinck, CL
AU - Rautenbach, CJD
AB - In this study, data from the Southern Hemisphere ADditional OZonesondes (SHADOZ) are used to compute the spatially averaged water vapour (WVg) over low and mid-tropical Africa. Based on the SHADOZ stations, reanalysis data from the National Centres for Environmental Prediction and Atmospheric Research (NCEP/NCAR) were partitioned into four grid cells: (1) over Ascension [10.0°S to 7.5°S, 12.5°W to 15.0°W]; (2) Nairobi [0.0° N to 2.5°S, 35.0°E to 37.5°E]; (3) Irene [27.5°S to 25.0°S, 27.5°E to 30.0°E] and (4) Reunion [22.5° S to 20.0° S, 55.0° E to 57.5°E]. The mean Water Vapour (WV) was computed over these grid cells to obtain (WVg). The temporal scales of WVg fluctuations have been analyzed using wavelet transforms and Principal Components. Analysis (PCA) of the WVg wavelet-transformed coefficients was used to demonstrate spatial organization of WV. The results indicate that WV exhibits localized spatial coherence patterns.
Further, the analysis show strong seasonal dependence of WV which is associated with global and local atmospheric circulation
DA - 2009
DB - ResearchSpace
DP - CSIR
KW - Water vapor
KW - Greenhouse gas
KW - Southern Hemisphere ADditional OZonesondes
KW - SHADOZ
KW - Tropical Africa
LK - https://researchspace.csir.co.za
PY - 2009
SM - 1680-7340
T1 - Multi-scale organization of water vapor over low and mid-tropical Africa
TI - Multi-scale organization of water vapor over low and mid-tropical Africa
UR - http://hdl.handle.net/10204/3497
ER -
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en_ZA |