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http://dx.doi.org/10.5532/KJAFM.2016.18.3.143

Some Meteorological Anomalies and their Relationships with Rice Yield for El Niño Years in South Korea  

Shim, Kyo-Moon (National Institute of Agricultural Sciences, RDA)
Jung, Myung-Pyo (National Institute of Agricultural Sciences, RDA)
Kim, Yong-Seok (National Institute of Agricultural Sciences, RDA)
Choi, In-Tae (National Institute of Agricultural Sciences, RDA)
Kim, Ho-Jung (National Institute of Agricultural Sciences, RDA)
Kang, Kee-Kyung (National Institute of Agricultural Sciences, RDA)
Publication Information
Korean Journal of Agricultural and Forest Meteorology / v.18, no.3, 2016 , pp. 143-150 More about this Journal
Abstract
In this study, we analyzed the relationship between rice yield and abnormal meteorological features for El $Ni{\tilde{n}}o$ years (with more than 1.0 Oceanic $Ni{\tilde{n}}o$ Index) since 1980 in South Korea. The national averaged rice yield of El $Ni{\tilde{n}}o$ years (n=14) was $4,663kg\;ha^{-1}$, which was less than that of non El $Ni{\tilde{n}}o$ years (n=16) by $102kg\;ha^{-1}$, but the difference was not significant statistically (t=1.215, p=0.234). The averaged rice yield of El $Ni{\tilde{n}}o$ end years ($4,558kg\;ha^{-1}$) was analyzed to be less than those of El $Ni{\tilde{n}}o$ start years and non El $Ni{\tilde{n}}o$ years by 209 and $206kg\;ha^{-1}$, respectively. But, the trend was not significant statistically (df=2, f=2.355, p=0.114). When meteorological anomalies were analyzed based on seasonal meteorological values, 18 meteorological events in total were observed for the past 30 years (1981-2010). In detail, abnormally much precipitation occurred 6 times, most often, followed by 5 times of abnormally low temperature during the past 30 years. Occurrence of meteorological anormalies of El $Ni{\tilde{n}}o$ end years was 0.71 events per year on average, which was higher than those of El $Ni{\tilde{n}}o$ start years ($0.43yr^{-1}$) and non El $Ni{\tilde{n}}o$ years ($0.63yr^{-1}$), even if the differences were not significant statistically (df=2, f=0.321, p=0.727).
Keywords
Abnormal meteorology; El $Ni{\tilde{n}}o$; Meteorological anomaly; Oceanic $Ni{\tilde{n}}o$ Index; Rice yield;
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Times Cited By KSCI : 1  (Citation Analysis)
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