Bulletin of the Korean Space Science Society (한국우주과학회:학술대회논문집(한국우주과학회보))
- 2010.04a
- /
- Pages.39.3-39.3
- /
- 2010
Sea-Level Pressure Response to the Fast Solar Wind Stream
- Cho, Il-Hyun (Korea Astronomy and Space Science Institute) ;
- Kwak, Young-Sil (Korea Astronomy and Space Science Institute) ;
- Marubashi, Katsuhide (Korea Astronomy and Space Science Institute) ;
- Chang, Heon-Young (Kyungpook National University) ;
- Cho, Kyung-Suk (Korea Astronomy and Space Science Institute) ;
- Kim, Yeon-Han (Korea Astronomy and Space Science Institute) ;
- Park, Young-Deuk (Korea Astronomy and Space Science Institute) ;
- Choi, Ho-Sung (Korea Astronomy and Space Science Institute)
- Published : 2010.04.15
Abstract
Solar-terrestrial links in short-time scales(daily ~monthly) are extensively explored in recent years: such as a response of low cloud amounts to the Forbush decrease, a response of Northern Atlantic oscillation index to sudden increase in electric field intensity of solar wind and so on (e.g., Svensmark et al., 2009; Boberg & Lundstedt, 2002). In this study, we perform the superposed epoch analysis to see any possible response of the sea-level pressure over Korean peninsula to the fast solar wind stream. Data sets are daily values, and zero days are determined to be days when the solar wind velocity exceeds 800km/s. Average profile of superposed sea-level pressure shows a gradual increase during the first 2 days and a decrease afterward below the normal level with a low pressure condition maintained for a few days. This result indicates that the sea-level pressure may respond to the fast solar wind stream. In other words, the average profile of sea-level pressure mimics the average velocity profiles. The correlation coefficient between two average profiles is 0.80, with 2 day lag.
Keywords