与高速太阳风事件相关的韩国上空Sea-Level气压的变化
Changes in Sea-Level Pressure over South Korea Associated with High-Speed Solar Wind Events
摘要：
我们探讨了韩国上空的日海平面气压（SLP）对高速太阳风事件的响应的可能性。这在两个方面很有意义：首先，如果存在统计关联，这可能是另一个证据，表明各种气象观测数据确实对行星际环境的变化做出了反应。其次，这可能是一个非常关键的观测约束，因为迄今为止提出的大多数模型预计将优先在高纬度地区比低纬度地区研究。我们已经检查了每日太阳风速度${\rm V}$，每日SLP差${\rm ΔSLP}$，和每日${\rm \log(BV^{2})}$使用叠加历元分析，其中的关键日期被设置为每日太阳风速度超过800 ${\rm kms^{-1}}$。我们发现，12个事件的每日平均${\rm ΔSLP}$在第+1天达到峰值，并逐渐降低回到其正常水平。${\rm ΔSLP}$的正偏差量为+2.5 hPa。偏离的持续时间为几天。我们还发现${\rm ΔSLP}$与太阳风和${\rm \log(BV^{2})}$的速度都有很好的相关性。两种情况下的线性相关系数和一天滞后的机会概率分别为$r \simeq 0.81$与$P> 99.9%$和$r \simeq 0.84$与$P> 99.9%$。最后，我们简要讨论了未来的发展方向。
英文摘要：
We explore a possibility that the daily sea-level pressure (SLP) over South Korea responds to the high-speed solar wind event. This is of interest in two aspects: First, if there is a statistical association this can be another piece of evidence showing that various meteorological observables indeed respond to variations in the interplanetary environment. Second, this can be a very crucial observational constraint since most models proposed so far are expected to preferentially work in higher latitude regions than the low latitude region studied here. We have examined daily solar wind speed ${\rm V}$, daily SLP difference ${\rm ΔSLP}$, and daily ${\rm \log(BV^{2})}$ using the superposed epoch analysis in which the key date is set such that the daily solar wind speed exceeds 800 ${\rm kms^{-1}}$. We find that the daily ${\rm ΔSLP}$ averaged out of 12 events reaches its peak at day +1 and gradually decreases back to its normal level. The amount of positive deviation of ${\rm ΔSLP}$ is +2.5 hPa. The duration of deviation is a few days. We also find that ${\rm ΔSLP}$ is well correlated with both the speed of solar wind and ${\rm \log(BV^{2})}$. The obtained linear correlation coefficients and chance probabilities with one-day lag for two cases are $r \simeq 0.81$ with $P> 99.9%$, and $r \simeq 0.84$ with $P> 99.9%$, respectively. We conclude by briefly discussing future direction to pursue.
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