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  • 1995-1999  (3)
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  • 1995-1999  (3)
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  • 1
    Online Resource
    Online Resource
    PERSEE Program ; 1998
    In:  Bulletin de l’Institut français d’études andines Vol. 27, No. 3 ( 1998), p. 721-731
    In: Bulletin de l’Institut français d’études andines, PERSEE Program, Vol. 27, No. 3 ( 1998), p. 721-731
    Abstract: Influence del'ENSO et de la NAO sur le cycle annuel de l’hydrologie de Colombie On évalue l’impact de El Niño-Oscillation du Sud (ENSO) et de l’Oscillation de l’Atlantique Nord (NAO) sur le cycle annuel hydrologique colombien. Les résultats du Projet de Réanalyse Climatologique NCEP/NCAR ont été utilisés pour identifier les mécanismes de la circulation atmosphérique qui interviennent dans cette région au cours des phases extrêmes de l’ENSO. En particulier, l’affaiblissement du courant jet inférieur d’ouest, qui se propage du Pacifique vers l’intérieur de la Colombie, est l’un des principaux mécanismes de circulation susceptible de nous aider à expliquer les anomalies hydrologiques en situation El Niño. Les résultats confirment l’importance de l’influence de l’ENSO et de la NAO sur les précipitations et les débits de Colombie, en particulier au cours des trimestres de septembre-octobre-novembre et de décembre-janvier-février.
    Type of Medium: Online Resource
    ISSN: 0303-7495
    Language: French
    Publisher: PERSEE Program
    Publication Date: 1998
    detail.hit.zdb_id: 2106197-X
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  • 2
    Online Resource
    Online Resource
    American Meteorological Society ; 1997
    In:  Journal of Climate Vol. 10, No. 10 ( 1997-10), p. 2690-2702
    In: Journal of Climate, American Meteorological Society, Vol. 10, No. 10 ( 1997-10), p. 2690-2702
    Type of Medium: Online Resource
    ISSN: 0894-8755 , 1520-0442
    RVK:
    Language: English
    Publisher: American Meteorological Society
    Publication Date: 1997
    detail.hit.zdb_id: 246750-1
    detail.hit.zdb_id: 2021723-7
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  • 3
    Online Resource
    Online Resource
    PERSEE Program ; 1998
    In:  Bulletin de l’Institut français d’études andines Vol. 27, No. 3 ( 1998), p. 537-546
    In: Bulletin de l’Institut français d’études andines, PERSEE Program, Vol. 27, No. 3 ( 1998), p. 537-546
    Abstract: Evidences of climate change in Colombia: trends and phase an amplitude changes of annual and semiannual cycles Several statistical techniques and tests are performed trying to detect signals of climatic change in hydroclimatic records of Colombia, including identifying possible changes in the mean and the variance of the records, as well as detection of trends and non-homogeneities of the records. Results confirm positive trends in minimum and mean temperature records throughout Colombia. Precipitation series exhibit no clear spatial signal. Most important rivers basins appear to exhibit decresing trends in discharge. Deforestation and changes in evapotranspiration could account for the observed trends. Complex Demodulation (CD) is used to examine the evolution of amplitude and phase of climatic records. CD confirms shifts in phase and amplitude of annual and semi-annual cycles. These results have tremendous impact on water resources availability and their planning and operation.
    Type of Medium: Online Resource
    ISSN: 0303-7495
    Language: French
    Publisher: PERSEE Program
    Publication Date: 1998
    detail.hit.zdb_id: 2106197-X
    Location Call Number Limitation Availability
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