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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >High resolution daily gridded rainfall data for the Indian region: Analysis of break and active monsoon spells
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High resolution daily gridded rainfall data for the Indian region: Analysis of break and active monsoon spells

机译：印度地区的高分辨率每日网格化降雨数据：断裂和活跃的季风季节的分析

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摘要

Here, we report the development of a high resolution (1 degree x 1 degree lat./long.) gridded daily rainfall dataset for the Indian region. There are only 1803 stations with minimum 90% data availability during the analysis period (1951-2003). For the analysis, we have followed the interpolation method proposed by Shepard. Standard quality-controls were performed before carrying out the interpolation analysis. Comparison with similar global gridded rainfall datasets revealed that the present rainfall analysis is better in accurate representation of spatial rainfall variation. Using this gridded rainfall dataset, an analysis was made to identify the break and active periods during the southwest monsoon season (June-September). Break (active) periods during the monsoon season were identified as those in which the standardized daily rainfall anomaly averaged over Central India (21-27 degree N, 72-85 degree E) is less than -1.0 (more than 1.0). The break periods thus identified for the period 1951-2003 were comparable with those identified by earlier studies. Contrary to a recent study, no evidence was found for any statistically significant trends in the number of break or active days during the period 1951-2003. This gridded rainfall dataset is available for noncom mercial applications.
机译：在这里，我们报告了印度地区高分辨率的每日降水数据集（1度x 1度纬度/经度）的发展。在分析期间（1951-2003），只有1803个站点的数据可用性至少为90％。为了进行分析，我们遵循了Shepard提出的插值方法。在进行插值分析之前，执行了标准质量控制。与类似的全球栅格化降雨数据集进行比较后发现，当前的降雨分析在准确表示空间降雨变化方面表现得更好。使用该栅格化的降雨数据集，进行了分析以识别西南季风季节（6月至9月）的中断和活跃期。季风季节的中断（活动）期被确定为印度中部（北纬21-27度，东经72-85度）平均每日标准化降水异常小于-1.0（大于1.0）的时期。因此确定的1951-2003年的休息时间与早期研究确定的时间相当。与最近的一项研究相反，没有证据表明1951-2003年期间休息或活动天数有任何统计学上的显着趋势。此栅格化降雨数据集可用于非商业应用。

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