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Spatial Characteristics of Precipitation in the Greater Sydney Metropolitan Area as Revealed by the Daily Precipitation Concentration Index
Atmosphere ( IF 2.9 ) Pub Date : 2021-05-13 , DOI: 10.3390/atmos12050627
Kevin K. W. Cheung , Aliakbar A. Rasuly , Fei Ji , Lisa T.-C. Chang

In this study; the spatial distribution of the Daily Precipitation Concentration Index (DPCI) has been analyzed inside the Greater Sydney Metropolitan Area (GSMA). Accordingly, the rainfall database from the Australian Bureau of Meteorology archive was utilized after comprehensive quality control. The compiled data contains a set of 41 rainfall stations indicating consistent daily precipitation series from 1950 to 2015. In the analysis of the DPCI across GSMA the techniques of Moran’s Spatial Autocorrelation has been applied. In addition, a cross-covariance method was applied to assess the spatial interdependency between vector-based datasets after performing an Ordinary Kriging interpolation. The results identify four well-recognized intense rainfall development zones: the south coast and topographic areas of the Illawarra district characterized by Tasman Sea coastal regions with DPCI values ranging from 0.61 to 0.63, the western highlands of the Blue Mountains, with values between 0.60 and 0.62, the inland regions, with lowest rainfall concentrations between 0.55 and 0.59, and lastly the districts located inside the GSMA with DPCI ranging 0.60 to 0.61. Such spatial distribution has revealed the rainstorm and severe thunderstorm activity in the area. This study applies the present models to identify the nature and mechanisms underlying the distribution of torrential rains over space within the metropolis of Sydney, and to monitor any changes in the spatial pattern under the warming climate.

中文翻译:

每日降水集中指数显示的大悉尼大都市区降水的空间特征

在这项研究中; 每日降水集中指数(DPCI)的空间分布已在大悉尼大都市区(GSMA)内部进行了分析。因此,经过全面质量控制后,利用了澳大利亚气象局档案馆的降雨数据库。汇编的数据包含一组41个降雨站,表明从1950年到2015年的日降水量序列是一致的。在对GSMA中DPCI的分析中,已应用了Moran的空间自相关技术。此外,在执行普通克里金插值后,使用交叉协方差方法评估基于矢量的数据集之间的空间相互依赖性。结果确定了四个公认的强降雨发展区:伊拉瓦拉地区的南海岸和地形区,以塔斯曼海沿岸地区为特征,DPCI值在0.61至0.63之间;蓝山的西部高地,DPCI值在0.60至0.62之间;内陆地区,降雨浓度最低,在0.55之间和0.59,最后是位于GSMA内的DPCI范围为0.60至0.61的地区。这种空间分布表明该地区出现了暴雨和雷暴天气。这项研究应用当前模型来确定悉尼大都市内暴雨在空间上的分布的本质和机理,并监测气候变暖下空间格局的任何变化。内陆地区的降雨浓度最低,介于0.60至0.62之间; DPCI的最低降水浓度介于0.55至0.59之间;最后是位于GSMA内部的地区,DPCI的范围在0.60至0.61之间。这种空间分布表明该地区出现了暴雨和雷暴天气。这项研究应用本模型来确定悉尼大都市内暴雨在空间上的分布的本质和机理,并监测气候变暖下空间格局的任何变化。内陆地区的降雨浓度最低,介于0.60至0.62之间; DPCI的最低降水浓度介于0.55至0.59之间;最后是位于GSMA内部的地区,DPCI的范围在0.60至0.61之间。这种空间分布表明该地区出现了暴雨和雷暴天气。这项研究应用当前模型来确定悉尼大都市内暴雨在空间上的分布的本质和机理,并监测气候变暖下空间格局的任何变化。
更新日期:2021-05-14
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