• 대한지리학회지
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• 제44권6호
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• pp.675-690
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• 2009

본 연구에서는 우리나라에 출현하는 황사에 영향을 미치는 요인을 파악하기 위하여, 우리나라의 황사 출현일수와 대기순환지수인 북극진동지수, 남극진동지수와 유라시아 대륙 적설면적과의 관계를 분석하였다. 우리나라의 황사 출현일수는 1980년대 중반 이후 증가하고 있는 경향이다. 월별로는 4월에 황사 출현일수가 집중되었고 전반기의 3.2일에서 후반기의 5.1일로 1.9일 증가하였다. 황사 출현일수와 겨울철 북극진동지수 및 남극진동지수와는 정적인 관계가 있었다. 이는 겨울철 북극진동지수와 남극진동지수가 양의 값일 때 황사 출현일수가 증가한다고 할 수 있다. 황사 출현일수와 유라시아 대륙 적설면적과는 부적인 관계가 있었다. 이는 유라시아에 적설면적이 감소하면 황사 출현일수가 증가한다고 할 수 있다.

• Journal of Astronomy and Space Sciences
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• 제36권3호
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• pp.149-157
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• 2019

In this study, we investigate the associations between the solar variability and teleconnection indices, which influence atmospheric circulation and subsequently, the spatial distribution of the global pressure system. A study of the link between the Sun and a large-scale mode of climate variability, which may indirectly affect the Earth's climate and weather, is crucial because the feedbacks of solar variability to an autogenic or internal process should be considered with due care. We have calculated the normalized cross-correlations of the total sunspot area, the total sunspot number, and the solar North-South asymmetry with teleconnection indices. We have found that the Southern Oscillation Index (SOI) index is anti-correlated with both solar activity and the solar North-South asymmetry, with a ~3-year lag. This finding not only agrees with the fact that El $Ni{\tilde{n}}o$ episodes are likely to occur around the solar maximum, but also explains why tropical cyclones occurring in the solar maximum periods and in El $Ni{\tilde{n}}o$ periods appear similar. Conversely, other teleconnection indices, such as the Arctic Oscillation (AO) index, the Antarctic Oscillation (AAO) index, and the Pacific-North American (PNA) index, are weakly or only slightly correlated with solar activity, which emphasizes that response of terrestrial climate and weather to solar variability are local in space. It is also found that correlations between teleconnection indices and solar activity are as good as correlations resulting from the teleconnection indices themselves.

• 한국환경과학회지
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• 제21권2호
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• pp.125-133
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• 2012

Climatological trend for the period of 1970 to 2009 in sea water temperature around the Antarctic Peninsular waters in the Southern Ocean was investigated. During the period from 1970 to 2009, sea water temperature in the top 500 m water column except 100 m increased at a rate of $0.003-0.011^{\circ}C{\cdot}yr^{-1}$, but at 100 m it decreased at a rate of $-0.003^{\circ}C{\cdot}yr^{-1}$. Although long-term trend is generally warming, there were several periods of sharp changes between 1970 and 2009. Annual mean sea water temperature between surface and 500 m except 100 m decreased from the early of 1970s to the end of 1980s, and then it increased to the end of 2000s. In the entire water column between the surface and 500 m, sea water temperature closely correlated with the El Nino events expressed as the Southern Oscillation Index(SOI), and SOI and sea water temperature have a dominant period of about 3-5 years and decade.