Meteorological effects of the eclipse of 11 August 1999 in cloudy and clear conditions
Meteorological effects of the eclipse of 11 August 1999 in cloudy and clear conditions
复制标题
DOI：
10.1098/rspa.2002.1042
复制
发表时间：
2003-02-08
影响因子：
3.5
通讯作者：
Harrison, RG
中科院分区：
文献类型：
--
作者：
Aplin, KL;Harrison, RG
1999 年 8 月 11 日日全食期间，在英国的两个地点进行了综合大气测量。尽管存在云，但敏感的高分辨率气象观测揭示了动态大气效应。与日食相关的短期变化主导了与天气条件相关的温度、风速和风向，并且在表面压力观测中检测到了 35 分钟周期的重力波。将太阳辐射变化的理论计算与伯克郡雷丁晴空下 97% 日偏食期间的观测结果进行比较，并用于预测康沃尔郡坎伯恩在全食期间预期的辐射变化。在坎伯恩，灵敏的细线温度计的垂直阵列与高分辨率声波风速计一起运行，记录频率为 5 Hz。尽管多云条件减少了日食引起的热扰动，但检测到了较小的温度和风变化，这与理论一致。首次在多云条件下明确检测到本影的冷流。
Integrated atmospheric measurements were made at two sites in the UK during the total solar eclipse of 11 August 1999. Sensitive high-resolution meteorological observations revealed dynamical atmospheric effects despite the presence of cloud. Short-term eclipse-related changes dominated over temperature, wind speed and wind directions associated with the synoptic conditions, and 35 min period gravity waves were detected in surface-pressure observations. Theoretical calculations for solar radiation changes were compared with observations made during the 97% partial eclipse in clear skies at Reading, Berkshire, and used to predict the radiative changes expected at Camborne, Cornwall, during totality. At Camborne, a vertical array of sensitive fine-wire thermometers was operated with a high-resolution sonic anemometer, logged at 5 Hz. Despite cloudy conditions, which reduced the eclipse-induced thermal perturbations, small temperature and Wind changes were detected which were consistent with theory. The cold outflow from the umbra was unambiguously detected for the first time in cloudy conditions.