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    Associations between Grain Crop Yields in Central-Eastern Argentina and El Niño–Southern Oscillation

    Source: Journal of Applied Meteorology:;1999:;volume( 038 ):;issue: 010::page 1488
    Author:
    Podestá, Guillermo P.
    ,
    Messina, Carlos D.
    ,
    Grondona, Martín O.
    ,
    Magrin, Graciela O.
    DOI: 10.1175/1520-0450(1999)038<1488:ABGCYI>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: Associations are investigated between yields of major crops in the Argentine Pampas (central-eastern Argentina) and El Niño?Southern Oscillation (ENSO) phase. For maize and sorghum, higher (lower) yield anomalies occur more frequently than expected by chance alone during warm (cold) ENSO events. For both crops, the depression of yields during cold events is, on average, larger and less variable than yield increases are during warm events. A yield decrease during cold events also is observed in soybean yields, although the effect of warm events is not statistically significant. There is a marginally significant tendency for low sunflower yields to occur less frequently than expected during cold events. Wheat, the only winter crop considered, did not show an association with ENSO. Precipitation anomalies during October?February (the period with strongest ENSO signal in the Pampas) are summarized through principal component analysis. Precipitation anomalies during November?January are significantly correlated with maize, sorghum, and soybean yield anomalies. In turn, those precipitation anomalies show a distinct ENSO signal. Late spring?early summer precipitation, then, appears to mediate associations between ENSO phase and yields of maize, sorghum, and soybean in the Pampas.
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      Associations between Grain Crop Yields in Central-Eastern Argentina and El Niño–Southern Oscillation

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4148153
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    contributor authorPodestá, Guillermo P.
    contributor authorMessina, Carlos D.
    contributor authorGrondona, Martín O.
    contributor authorMagrin, Graciela O.
    date accessioned2017-06-09T14:07:10Z
    date available2017-06-09T14:07:10Z
    date copyright1999/10/01
    date issued1999
    identifier issn0894-8763
    identifier otherams-12777.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4148153
    description abstractAssociations are investigated between yields of major crops in the Argentine Pampas (central-eastern Argentina) and El Niño?Southern Oscillation (ENSO) phase. For maize and sorghum, higher (lower) yield anomalies occur more frequently than expected by chance alone during warm (cold) ENSO events. For both crops, the depression of yields during cold events is, on average, larger and less variable than yield increases are during warm events. A yield decrease during cold events also is observed in soybean yields, although the effect of warm events is not statistically significant. There is a marginally significant tendency for low sunflower yields to occur less frequently than expected during cold events. Wheat, the only winter crop considered, did not show an association with ENSO. Precipitation anomalies during October?February (the period with strongest ENSO signal in the Pampas) are summarized through principal component analysis. Precipitation anomalies during November?January are significantly correlated with maize, sorghum, and soybean yield anomalies. In turn, those precipitation anomalies show a distinct ENSO signal. Late spring?early summer precipitation, then, appears to mediate associations between ENSO phase and yields of maize, sorghum, and soybean in the Pampas.
    publisherAmerican Meteorological Society
    titleAssociations between Grain Crop Yields in Central-Eastern Argentina and El Niño–Southern Oscillation
    typeJournal Paper
    journal volume38
    journal issue10
    journal titleJournal of Applied Meteorology
    identifier doi10.1175/1520-0450(1999)038<1488:ABGCYI>2.0.CO;2
    journal fristpage1488
    journal lastpage1498
    treeJournal of Applied Meteorology:;1999:;volume( 038 ):;issue: 010
    contenttypeFulltext
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