Abstract

The seasonal and daily variations in the coefficient of optical radiation extinction due to midges (COREM) in western Siberia are calculated for June, July, August, and September 2018. The average COREM values in the visible and infrared spectral regions were ∼0.06 km⁻¹ in June, ∼0.05 km⁻¹ in July, ∼0.04 km⁻¹ in August, and ∼0.02 km⁻¹ in September. There are two maxima in the daily variations in June, July, August, and September. The first maximum falls on 09:00; the second maximum is more pronounced and is observed at 17:00. The COREM is minimal in nighttime (01:00–05:00) and at noon. In addition, a different daily behavior is characteristic for certain days of September, with a maximum in daytime and a minimum in nighttime.

中文翻译：

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2018年夏秋季西西伯利亚地表空气中蠓引起的光辐射消光系数的季节和日变化

摘要

计算了 2018 年 6 月、7 月、8 月和 9 月西西伯利亚西部蠓引起的光辐射消光系数 (COREM) 的季节和每日变化。可见光和红外光谱区域的平均 COREM 值为 ∼0.06 km ^{− 6}月为 1，7 月为 ∼0.05 km ^-1，8月为∼0.04 km ^-1，9月为 ∼0.02 km ^-1。日变化在六月、七月、八月和九月有两个最大值。第一个最大值出现在 09:00；第二个最大值更为明显，出现在 17:00。COREM 在夜间（01:00–05:00）和中午最少。此外，九月某些日子的日常行为有所不同，白天最多，夜间最少。