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崔孝 江陵大學校東海岸地域硏究所 1993 東海岸硏究 Vol.4 No.1
東海海域에서의 海上風을 豫測하기 위한 모델의 開發이 遂行되었다. 實在 觀測되는 海水面上의 表層風速은 日氣圖에서 求한 地均風速과는 상당한 差異를 보였다. 海上에서 形成되는 表層風速은 地表層에서 거리에 따른 氣壓差에 依한 地均風과 觀測된 時間동안 氣壓의 時間變化에 依한 變壓風 및 風速, 水溫과 氣溫 等의 函數인 海水面摩擦에 依해 形成되는 減殺速度의 合成된 바람으로 計算될 수 있으며 束草와 鏡浦 앞 海上에서 觀測된 實在 海上風速과 計算된 海上風速値가 매우 近接된 相關關係(0.95)의 數値로 나타났다. 또한 計算된 海上風應力은 東海 全 海上에서의 바람에 依한 海水의 反應을 나타내고 있으며, 束草와 鏡浦에서 觀測 期間동안 바람의 應力螺旋은 弱한 海水面 上昇과 下降을 초래하였다. The development of a model to forecast marine wind fields in the East Sea of Korea was carried out with regard to the time variation. The observed real marine surface winds over the sea surface were far inconsistent of geostrophic winds calculated from the surface weather map. The marine surface wind formed over the sea surface can be calculated by the summation of geostrophic wind generated by the spatial difference of atmospheric pressures, isallobaric wind derived by the temporal variation of pressure change and the retarded speed due to the surface friction force on the sea surface, functioned with wind speed, sea surface temperature and air temperature. A very close correlation(0.9) was shown between the calculated wind speeds and the observed real marine surface wind speeds over the sea surface at Sokcho and Kyungpo. The calculated wind stress described the respose of the sea waters to the marine wind in the East Sea of Korea and the variation of wind stress curls at Sokcho and Kyungpo during the observed period resulted in weak elevation or subsidence of sea surfaces in the study area.
최효,Choi, Hyo 한국해양학회 1984 韓國海洋學會誌 Vol.19 No.2
Diurnal variations of coastal surface wind speed are analyzed with five years of hourly wind from Port Aransas, Texas. These data reveal the highest frequency of occurrence of the nighttime wind maximum near midnight, especially during those seasons when onshore flow prevails. Nighttime wind maxima with a southerly component occurred approximately three times more frequently than with a northerly component on the annual average. The neutral atmospheric stability prevails near the coast. Thus it allows downward transfer of momentum from the nocturnal low level jet under the onshore wind situation and strong wind shear between an elevated frontal and ground-based inversion for offshore wind, resulting in the nocturnal coastal surface wind maximum.
고비사막에서 황사의 유입 전, 후의 강릉시에서 매 시각별 PM10, PM2.5, PM1농도에 영향을 미치는 대기경계층과 상관관계 예측
최효,이미숙 건국대학교 기후연구소 2012 기후연구 Vol.7 No.1
Atmospheric boundary layer influenced upon hourly PM1, PM2.5 and PM10, concentrations and their correlation coefficient and regression equations before and after the intrusion of yellow dusts from Gobi Desert toward Gangneung city were investigated on October 26~29, 2003. PM concentrations of the city were very high at 0900LST(beginning time of office hour) by the combination of yellow dusts from Gobi Desert, emitted atmospheric pollutants from vehicles with flying dusts from the road under a shrunken thermal internal boundary layer. Maximum PM concentrations were detected at 1700LST(ending time of office hour) by the accumulation of yellow dusts from the desert, emitted pollutants from vehicles, f lying dusts from the road and emitted pollutants from heating boilers in the resident area under a shrunken nocturnal surface inversion. Correlation coefficient of PM10 and PM2.5(PM2.5 and PM1, and PM10 and PM1) before the dust intrusion was 0.90(0.99, 0.84) and one with 0.98(1.00, 0.97) during the dust intrusion, but its coefficient of 0.23(0.81, -0.36) after the ending of dust intrusion, was very low. 2003년 10월 26~29일까지 고비사막으로부터 강릉시로 황사의 유입 전, 후의 매 시각별 PM10, PM2.5와 PM1농도의 영향을 미치는 대기경계층과 PM농도 간의 상관관계 및 회귀식을 조사되었다. 고비사막에서유입된 황사와 차량에서 방출되는 대기오염물질 및 도로의 비산먼지가 결합되고, 열적내부경계층이 수축되어강릉시내 PM농도가 09시 매우 높았다. 수축된 야간접지역전층 내에서 황사, 차량의 배기가스와 주거지역의난방보일러에서 방출된 대기오염물질이 추척되어 퇴근시간인 17시에 최대농도가 나타났다. 황사의 유입 전에 PM10과 PM2.5(PM2.5와 PM1, PM10과 PM1) 간의 상관계수는 0.90(0.99, 0.84)이었고, 황사 유입 기간에는0.98(1.00, 0.97), 황사의 유입이 종료된 후에는 0.23(0.81, -0.36)로 매우 낮았다.