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Wind Convolution and Ozone Distribution over Nigeria

机译:尼日利亚的风卷积和臭氧分布

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The effect of zonal and meridional wind on surface ozone variability in Nigeria in the four quarter of the year was explored using data from Atmospheric Infrared sounder (AIRS) of NASA. Namely, December, January, February (DJF); March, April, May (MAM); June, July, August (JJA) and September, October, November (SON). The study revealed that both the day and night time surface ozone distribution in DJF season recorded a significant correlation of 0.7 with the zonal wind flow pattern, and a less significant correlation of 0.36 with the meridional wind flow pattern. Average maximum ozone concentration of 281.4DU southward and 260.3DU northward were observed in DJF. In JJA, the meridional wind pattern recorded strong west to east flow which was non-parallel to the latitudinal lines. It had a significant negative-correlation of – 0.56 with the ozone distribution for that season. Also the JJA zonal wind flow unlike that of DJF, recorded significant west to east flow resulting in partial atmospheric blocking which constrained the maximum ozone concentration westward with an average of 307DU retained within longitudes 2oE - 6oE in western Nigeria, for all the seven years studied. This was contrary to the direction of the prevailing meridional flow for the season which was predominantly eastward.
机译:利用美国国家航空航天局的大气红外测深仪(AIRS)的数据,探索了纬向和经向风对尼日利亚第四季度地面臭氧变化的影响。即,十二月,一月,二月(DJF); 3月,4月,5月(MAM); 6月,7月,8月(JJA)和9月,10月,11月(SON)。研究表明,DJF季节的白天和夜间地表臭氧分布与纬向风流模式相关性显着为0.7,与子午风流模式相关性为0.36。 DJF的平均最大臭氧浓度为南向281.4DU,北向260.3DU。在JJA中,子午风模式记录了强烈的西向东流动,这与纬度线不平行。它与该季节的臭氧分布具有显着的负相关系数– 0.56。此外,与DJF不同,JJA纬向风流量记录了从西到东的大量气流,导致部分大气阻塞,这限制了整个研究的七年中尼日利亚西部的最大臭氧浓度向西移动,平均307DU保留在经度2oE-6oE内。 。这与该季节主要向东的子午流方向相反。

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