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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >The global distribution of the dusk-to-nighttime enhancement of summer N_mF_2 at solar minimum
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The global distribution of the dusk-to-nighttime enhancement of summer N_mF_2 at solar minimum

机译：dusk-to-nighttime的全球分布增强的夏天N_mF_2太阳能最低

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摘要

In this paper, the dusk-to-nighttime enhancement (DNE) of summer N_mF_2 was investigated based on Constellation Observing System for Meteorology, Ionosphere, and Climate radio occultation observations at solar minimum. The global distributions of the magnitude and the peak time of the DNE as well as the role of the DNE in N_mF_2 diurnal cycle were presented. The DNE mainly exists in three regions (one in the Southern Hemisphere and two in the Northern Hemisphere), and its distribution is related to geomagnetic configuration, especially in the Southern Hemisphere. For most DNEs, their peaks correspond to the maxima of N_mF_2 diurnal cycle. The DNEs are much more prominent in the southern than in the northern summer hemisphere; they last to later nighttime hours, have larger magnitudes, and play more important roles in N_mF_2 diurnal cycle in the southern than in the northern summer hemisphere. The distribution of the DNE was analyzed in terms of photoionization and the vertical plasma drift induced by neutral winds. The positive geomagnetic declinations and the smaller geomagnetic inclinations at higher geographic latitudes over the South Pacific are crucial for the prominent DNEs in the southern summer hemisphere; they result in larger upward plasma drift at higher latitudes where photoionization is still significant at sunset and evening hours.
机译：摘要dusk-to-nighttime增强(DNE)夏季N_mF_2基于调查星座为气象观测系统,电离层和气候无线电掩星观察太阳能最低。大小分布和峰值时间的DNE以及DNE的角色N_mF_2昼夜循环。主要存在于三个区域(一个南半球和两个在北部半球),它的分布有关地磁配置,特别是在南半球。对应的最大值N_mF_2昼夜循环。南方的DNEs更突出比在北方夏天半球;以后的时间,有更大的大小,和N_mF_2周日中扮演更重要的角色在南部比北部夏季循环半球。分析了光电离的纵向等离子体漂移引起的中性风。积极的地磁由于和较小的地磁倾向更高南太平洋的地理纬度突出的DNEs在南部的关键夏天半球;等离子体漂移在高纬度地区光致电离日落时仍然是重要的和晚上时间。

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