Using citizen science reports to define the equatorial extent of auroral visibility
Using citizen science reports to define the equatorial extent of auroral visibility
复制标题
使用公民科学报告来定义极光可见度的赤道范围
DOI：
10.1002/2015sw001320
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发表时间：
2016
期刊：
影响因子：
3.7
通讯作者：
Case N
中科院分区：
文献类型：
--
作者：
Case N
由于极光椭圆的高度，极光经常可以在赤道方向数百公里处看到。因此，美国国家海洋和大气管理局空间天气预报中心（SWPC）的极光预报产品提供了一个“视线”，以证明赤道范围的极光能见度，假设它是足够明亮和高度。SWPC产品中的视线基于每个半球最亮极光的纬度，由真实的时间椭圆变化、评估、跟踪、强度和在线临近预报（OVATION）Prime（2010）极光降水模型指定。在这项研究中，我们利用了近500份公民科学极光报告，与使用OVATION Prime（2013）极光降水数据的更新SWPC极光预报产品提供的视图线进行比较。2015年3月和4月期间，使用极光龙平台记录了公民科学观测，并涵盖了一个大型地磁风暴和几个较小的事件。我们发现，这一更新的SWPC视图线是保守的估计，极光往往是可见的进一步赤道比预测。通过使用公民报告来修改用于将OVATION Prime（2013）模型与视线联系起来的缩放参数，我们产生了一个新的视线估计，可以更准确地表示可见极光的赤道范围。还开发了OVATION Prime（2013）基于能通量的赤道边界视图线，并发现其与公民科学报告的总体一致性最好，准确度为91%。
An aurora may often be viewed hundreds of kilometers equatorward of the auroral oval owing to its altitude. As such, the NOAA Space Weather Prediction Center (SWPC) Aurora Forecast product provides a “view line” to demonstrate the equatorial extent of auroral visibility, assuming that it is sufficiently bright and high in altitude. The view line in the SWPC product is based upon the latitude of the brightest aurora, for each hemisphere, as specified by the real‐time oval variation, assessment, tracking, intensity, and online nowcasting (OVATION) Prime (2010) aurora precipitation model. In this study, we utilize nearly 500 citizen science auroral reports to compare with the view line provided by an updated SWPC aurora forecast product using auroral precipitation data from OVATION Prime (2013). The citizen science observations were recorded during March and April 2015 using the Aurorasaurus platform and cover one large geomagnetic storm and several smaller events. We find that this updated SWPC view line is conservative in its estimate and that the aurora is often viewable further equatorward than is indicated by the forecast. By using the citizen reports to modify the scaling parameters used to link the OVATION Prime (2013) model to the view line, we produce a new view line estimate that more accurately represents the equatorial extent of visible aurora. An OVATION Prime (2013) energy flux‐based equatorial boundary view line is also developed and is found to provide the best overall agreement with the citizen science reports, with an accuracy of 91%.
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影响因子：
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DOI：
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发表时间：
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期刊：
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