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    Influence of Soil Moisture Anomaly on Temperature in the Sahel: A Comparison between Wet and Dry Decades

    Source: Journal of Hydrometeorology:;2003:;Volume( 004 ):;issue: 002::page 437
    Author:
    Shinoda, M.
    ,
    Yamaguchi, Y.
    DOI: 10.1175/1525-7541(2003)4<437:IOSMAO>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: The influence of the Sahelian drought and resultant soil moisture deficit on air temperature is explored, using a simple water balance model that was validated with multiyear observations of the root-zone soil moisture. A comparison between wet soil years in the 1950s to 1960s and dry soil years in the 1970s to 1980s demonstrated a series of processes by which precipitation anomalies during the rainy season of a few months influence the time-lagging temperature through soil moisture. These processes were clearly seen only during the beginning 1 or 2 months of the dry season, and then both the concurrent soil moisture and temperature anomalies disappeared. Thus, the timescale of the drying up of root-zone soil moisture anomalies was determined to be approximately 1.5 months. This suggests that the root-zone soil moisture does not act as a memory of rainfall anomaly into the following rainy season and is not related to the long-term persistence of the drought.
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      Influence of Soil Moisture Anomaly on Temperature in the Sahel: A Comparison between Wet and Dry Decades

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/4206340
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    • Journal of Hydrometeorology

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    contributor authorShinoda, M.
    contributor authorYamaguchi, Y.
    date accessioned2017-06-09T16:17:34Z
    date available2017-06-09T16:17:34Z
    date copyright2003/04/01
    date issued2003
    identifier issn1525-755X
    identifier otherams-65147.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4206340
    description abstractThe influence of the Sahelian drought and resultant soil moisture deficit on air temperature is explored, using a simple water balance model that was validated with multiyear observations of the root-zone soil moisture. A comparison between wet soil years in the 1950s to 1960s and dry soil years in the 1970s to 1980s demonstrated a series of processes by which precipitation anomalies during the rainy season of a few months influence the time-lagging temperature through soil moisture. These processes were clearly seen only during the beginning 1 or 2 months of the dry season, and then both the concurrent soil moisture and temperature anomalies disappeared. Thus, the timescale of the drying up of root-zone soil moisture anomalies was determined to be approximately 1.5 months. This suggests that the root-zone soil moisture does not act as a memory of rainfall anomaly into the following rainy season and is not related to the long-term persistence of the drought.
    publisherAmerican Meteorological Society
    titleInfluence of Soil Moisture Anomaly on Temperature in the Sahel: A Comparison between Wet and Dry Decades
    typeJournal Paper
    journal volume4
    journal issue2
    journal titleJournal of Hydrometeorology
    identifier doi10.1175/1525-7541(2003)4<437:IOSMAO>2.0.CO;2
    journal fristpage437
    journal lastpage447
    treeJournal of Hydrometeorology:;2003:;Volume( 004 ):;issue: 002
    contenttypeFulltext
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