황사가 식물플랑크톤에 미치는 영향을 파악하기 위해, 황사가 발생한 2006년 4월 22 ~ 26일까지 태안반도 인근해역에서 현장조사 및 생리실험을 수행하였다. 황사발생동안 식물플랑크톤 군집은 26 ~ 290 × 103 cells·L-1의 범위로 다소 낮은 현존량과 주요 분류군인 돌말류의 증가, 특히 혼합해역의 대표종인 Paralia sulcata와 같은 저서성 돌말류의 증가가 뚜렷하였다. 또한 황사발생 후의 Chl-a 농도는 황사발생 전의 조석에 따른 Chl-a 농도변화범위를 초과하였다. 황사투여실험에서는 황사투여 농도가 증가함에 따라 일차생산력은 점차 감소하였고, 최대 탄소 동화계수 역시 같은 경향을 보였다. 48시간 배양실험에서는 황사투여 초기(T0)에 실험구(test)가 대조구(control)에 비해 낮은 일차생산력을 보였으나, 48시간 후(T48)에는 실험구가 대조구보다 높은 일차생산력을 보였다. 특히 실험구는 초기보다 48시간 후의 일차생산력이 약 321%로 크게 증가하였다. 따라서 중국과 인접한 조사해역의 식물플랑크톤은 황사와 함께 수반되는 강한 물리적 환경이 발생초기에 식물플랑크톤의 성장을 일시적으로 저해시킬 수 있으나, 이후 안정적인 수괴가 지속될 경우 식물플랑크톤의 성장을 촉진시키는 잠재적인 요인으로도 파악되었다.

In order to investigate the variations and corelation among PM10, PM2.5 and PM1 concentrations, the hourly concentrations of each particle sizes of 300 ηm to 20 μm at a city, Gangneung in the eastern mountainous coast of Korean peninsula have been measured by GRIMM aerosol sampler-1107 from March 7 to 17, 2004. Before the influence of the Yellow Dust event from China toward the city, PM10, PM2.5 and PM1 concentrations near the ground of the city were very low less than 35.97 μg/m3, 22.33 μg/m3 and 16.77 μg/m3, with little variations. Under the partial influence of the dust transport from the China on March 9, they increased to 87.08 μg/m3, 56.55 μg/m3 and 51.62 μg/m3. PM10 concentration was 1.5 times higher than PM2.5 and 1.85 times higher than PM1. Ratio of (PM10-PM2.5)/PM2.5 had a maximum value of 1.49 with an averaged 0.5 and one of (PM2.5-PM1)/PM1 had a maximum value of 0.4 with an averaged 0.25. PM10 and PM2.5 concentrations were largely influenced by particles smaller than 2.5 μm and 1 μm particle sizes, respectively. During the dust event from the afternoon of March 10 until 1200 LST, March 14, PM10, PM2.5 and PM1 concentrations reached 343.53 μg/m3, 105 μg/m3 and 60 μg/m3, indicating the PM10 concentration being 3.3 times higher than PM2.5 and 5.97 times higher than PM1. Ratio of (PM10-PM2.5)/PM2.5 had a maximum value of 7.82 with an averaged 3.5 and one of (PM2.5-PM1)/PM1 had a maximum value of 2.8 with an averaged 1.5, showing PM10 and PM2.5 concentrations largely influenced by particles greater than 2.5 μm and 1 μm particle sizes, respectively. After the dust event, the most of PM concentrations became below 100 μg/m3, except of 0900LST, March 15, showing the gradual decrease of their concentrations. Ratio of (PM10-PM2.5)/PM2.5 had a maximum value of 3.75 with an averaged 1.6 and one of (PM2.5-PM1)/PM1 had a maximum value of 1.5 with an averaged 0.8, showing the PM10 concentration largely influenced by corse particles than 2.5 μm and the PM2.5 by fine particles smaller than 1 μm, respectively. Before the dust event, correlation coefficients between PM10, PM2.5 and PM1 were 0.89, 0.99 and 0.82, respectively, and during the dust event, the coefficients were 0.71, 0.94 and 0.44. After the dust event, the coefficients were 0.90, 0.99 and 0.85. For whole period, the coefficients were 0.54, 0.95 and 0.28, respectively.