| 城市效应对区域雷电活动影响分析与灾害防御 |
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| 引用本文： | 张科杰,成勤.城市效应对区域雷电活动影响分析与灾害防御[J].农学学报,2018,8(9):52-57. |
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| 作者姓名： | 张科杰 成勤 |
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| 作者单位： | 湖北省防雷中心,宜昌市气象局 |
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| 基金项目： | 湖北省防雷中心课题“城市热岛效应对区域雷电活动影响分析”(FL-Y-2016010)。 |
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| 摘 要： | 为了研究城市化建设对区域雷电的影响，揭示自然环境的改变对雷电活动规律产生的变化，为不同区域雷电防护重点提供理论依据。本研究利用湖北省5个城市样本2007—2016年闪电定位资料，分析了所选样本城市城区和非城区云地闪密度以及日频、月频、季节变化、雷电流强度。结果表明：城区云地闪密度小于非城区云地闪密度，城市效应减小了城区雷电发概率；云地闪日频次分布城区波动幅度比非城区大，分时城区雷电流平均跨度值明显大于非城区，城区受到局地气候的影响较大；全年各月正闪频次占比城区均大于非城区，雷电高发的月份城区云地闪强度均大于非城区。整体来看，城市效应使城区的云地闪密度降低，强度增加，且呈现出雷电流幅值跨度大等不稳定性，相对于非城区更容易出现极端雷暴事件。
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| 关 键 词： | 农业文化遗产 农业文化遗产 动态保护 群落结构 生物多样性 林盘 |
| 收稿时间： | 2018/3/22 0:00:00 |
| 修稿时间： | 2018/7/12 0:00:00 |
Urban Effect on Regional Lightning Activities and Disaster Prevention |
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| Abstract: | The paper aims to study the effect of urbanization construction on regional lightning, reveal changes of lightning activity caused by natural environment change, and provide a basis for lightning disaster prevention in different regions. We analyzed the cloud-ground lightning density, diurnal frequency, monthly frequency, seasonal variation and lightning current intensity of the selected urban and non-urban areas based on the lightning location data from 2007 to 2016 in 5 cities of Hubei. The results showed that: the urban lightning density was less than non-urban, and the urban effect reduced the probability of lightning in urban areas; the lightning frequency distribution of urban areas was larger than that of non-urban areas, and the average span value of time-sharing lightning of urban areas was significantly larger than that of non-urban areas; the urban area was affected obviously by local climate; the positive lightning proportion of urban areas was greater than that of non-urban areas in each month, and the lightning intensity of urban areas was larger than that of non-urban areas during lightning active phase. On the whole, the urban effect decreases the cloudground lightning density of the urban area and increases the intensity, and presents the instability such as big lightning current amplitude, thus the urban area is more prone to extreme thunderstorm events. |
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| Keywords: | Urban Effect Ground Lightning Density Lightning Frequency Environment Agricultural Production |
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