摘要
El-Nino/La-Nina和印度洋偶极子(IDO)对缅甸降雨分布的影响(1990-2019年统计分析报告)
作者(年代):觉丹乌每一个农业国家都必须研究降雨模式或其影响。本文在次区域尺度上研究了Ni′o和印度洋偶极子(IOD)异常事件对缅甸夏季风降水(6 - 9月)的相对影响。本研究使用了UCAR和NOAA 1990-2019年的Ni ø o3-4和IOD指数数据集。以及ERA5-再分析数据降水数据、缅甸各地夏季风降水数据为同质和次区域降水数据集。IOD与缅甸夏季风降水部分相关的空间分布表明，在季风槽区、缅甸西南沿海部分地区和泰国部分地区，IOD对降雨有显著影响。对于降雨区域，我们以平均面积(90E-105E和10N-28N)为缅甸，在时间尺度上，使用每个数据集的夏季风季(JJAS)数据。Ni - o和IOD索引数据是已经定义的区域，但时间是收集的。对于Ni′o异常(El Ni′o或La Ni′a)事件，所选数据定义为Ni′o3-4区域月海温平均值的+/- 4。IOD的正负相定义如上文所述，所选数据定义为月两次海表异常差值的+/-4。我们根据世界气象组织《气候计算指南》中的公式，特别是异常和相关分析，对所有数据集进行整体统计分析。乐动KENO快乐彩 Study the relative influences of the IOD and the Ni�o anomalies on the summer rainfall of these regions by grid data analysis with Open-Grads climate data display to understand the impacts of the IOD/Ni�o anomalies on Myanmar monsoon rainfall at a regional scale. If IOD and Ni�o anomalies are the same values positive or negative, rainfall distribution was randomized distribution. If IOD negative anomaly or negative phase can impact monsoon rainfall over Myanmar. Found Ni�o can impact positively correlation over Myanmar monsoon rainfall distribution during IOD normal situations with weak correlation. And during IOD normal year rainfall distribution are not enough strong correction with Ni�o directly and not a correlation with for IOD anomaly year rainfall. We can also found a strong negative correlation (-0.3 to -0.4) with strong regression values (- 0.3 to -0.6) between SST and Myanmar monsoon rainfall distribution. As the results of the 3 variables correlation, IOD and rainfall distribution had a negative correlation and IOD and Ni�o had a positive correlation. Their turning point is around values of +/- 0.3 and its values indicate a weak positive (negative) linear relationship via a shaky linear rule. The influence of the IOD negative phase on monsoon rainfall over Myanmar is more than that of positive IOD during Ni�o normal situation.
