• 대한공간정보학회지
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• 제24권2호
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• pp.55-62
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• 2016

Economic and social damages are expected due to yellow dust, occurring every year in Korea and risk of citizens is getting higher accordingly. This study acquired tweet data for yellow dust, which had been the greatest since 2009 for 11 days before and after February 23, 2015. After that, it conducted an analysis on the issue words and association rule. Regarding acquired tweet data, the results of analyzing issue words by using open source R, statistics language shows that 'Mask' was ranked to be the highest, followed by health-related issue words. This indicates that people put the priority in the use of mask for keeping their health, as a result of the occurrence of yellow dust, and subsequently, they showed an interest in diseases, caused by yellow dust. In addition, yellow dust-related diseases, 'cold', 'rhinitis', 'flu', 'asthma', 'bronchitis' were found as issue words, revealing that people had a high concern on the disease occurrence of the respiratory system. The analytical results are judged to reflect the citizen's thought effectively in the process of establishing measures for the prevention of yellow dust.

• 대기
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• 제26권4호
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• pp.565-576
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• 2016

The yellow dust events in Korea are often associated with extratropical cyclones (ETCs) that travel across the source regions of yellow dusts. Although such synoptic patterns are well documented, climatic features of ETCs themselves during the yellow dust events are not well understood. The present study reports climatic features of spring-time ETCs, which accompany the yellow dust events in Korea, by tracking individual ETCs with an automated tracking algorithm. By analyzing Lagrangian tracks of ETCs from 1979 to 2014, it is found that, during yellow dust events, ETCs are located around Vladivostok, Russia. They are typically originated from the leeside of Altai-Sayan mountains about three days before the onset of the yellow dust events, and travel either eastward or southeastward in time. While their tracks are not unusual, they grow faster over the source regions of the yellow dusts, possibly lifting desert dusts above the planetary boundary layer, and further develop slowly as they travel eastward.

• 한국대기환경학회지
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• 제17권6호
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• pp.487-492
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• 2001

In this technical information, the springtime TSP measurement data between 1993 and 1996 at Kosan are presented. Based on the data, it was found that the concentrations of crustal species increase when Yellow Dust phenomenon occurs. Among anthropogenic species, the concentration of Pb and NO$_3$$^{[-10]}$ increase when Yellow Dust phenomenon occurs. Further research agenda are discussed to study the effects of Yellow Dust.

• 한국산업융합학회 논문집
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• 제20권4호
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• pp.339-343
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• 2017

Masks are a portable functional product for daily use. They can protect user health by filtering harmful fine particles in the air. In the past decade, there have been approximately 10 yellow dust incidences per year, amounting to a total duration of 20 days, and they continue to increase year after year. In addition, the frequency of yellow dust incidences in Korea has increased by more than four times compared to levels from the 1970s. Statistical reports indicate that annual damages caused by yellow dust amount to more than six trillion KRW. This study developed a zero-fog multi-layer mask with a collection efficiency and yellow dust and particulate matter filtration areas that are at least thrice as effective as existing masks. The new mask also reduces pressure drag by half.

• 해양환경안전학회지
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• 제24권7호
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• pp.898-906
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• 2018

황사가 식물플랑크톤에 미치는 영향을 파악하기 위해, 황사가 발생한 2006년 4월 22 ~ 26일까지 태안반도 인근해역에서 현장조사 및 생리실험을 수행하였다. 황사발생동안 식물플랑크톤 군집은 $26{\sim}290{\times}10^3cells{\cdot}L^{-1}$의 범위로 다소 낮은 현존량과 주요 분류군인 돌말류의 증가, 특히 혼합해역의 대표종인 Paralia sulcata와 같은 저서성 돌말류의 증가가 뚜렷하였다. 또한 황사발생 후의 Chl-a 농도는 황사 발생 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.

• 대한원격탐사학회:학술대회논문집
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• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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• pp.920-922
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• 2003

Large plumes of yellow send or yellow dust blow out over the Sea of Japan and the Japanese archipelago from mainland of China. In this study, the methodology to capture the perspective on the large Yellow dust storm by using MODIS data is discussed. As the typical image of yellow send, MODIS data obtained of April 8, 2002 were used in this study.

• 한국가시화정보학회지
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• 제5권2호
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• pp.3-8
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• 2007

Yellow dust problem is one of serious environmental problems in East Asia. The earth's abnormal climate changes and rapid industrializations over the mainland China seem to make the matter worse than ever before. In order to solve the yellow dust problem, collaborative works are necessary not only in the fields of meteorology and engineering, and but also through national consistent policies beyond the nations. In this regards, reporting on current policies of our meteorological administrative on the yellow dust problem can be regarded as valuable services for the engineers working in the fields of energy and environments.

• 한국대기환경학회지
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• 제10권4호
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• pp.233-244
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• 1994

The phenomenon of yellow sand (dust clouds) occurred in Korea during the spring of 1993 and 1994 is studied in detail. In total 6 cases including 15 days of yellow sand were observed in 1993 and the annual number of these events was found to increased. Examinations in this study include meteorological charts satellite imagery, pilot reports (PIREP) of Korea Air Force, and air concentrations of total suspended particulates(TSP). We present on estimation of total atmospheric loadings based on the observation and theory. According to the PIREP, in general the dust clouds travelled in the lower troposphere up to the level 5km. The visibility within the clouds was in the range of 3-8km The area covered by yellow sand in an event exceeded 0.4 M $\textrm{km}^2$ . According to trajectory analyses, dust clouds invaded Korea in April and May 1993 were landed in the sink area after 2~4 days travelling for 2,000~3,000km from a source region. Estimates of total atmospheric loadings of a dust cloud for April 23~24 in 1993 were 1.5 M ton. In addition, 7 dust storms were also reported in synoptic observations in NW China and Mongolia during the spring in 1994. The yellow sand was not reported with meteorological observations in Korea, however pilots reported significant dust clouds over the Yellow Sea on 8 and 13 April and 20 May 1994.

• 대기
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• 제22권2호
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• pp.137-147
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• 2012

The technique of Brightness Temperature Difference (BTD) between 11 and $12{\mu}m$ separates yellow sand dust from clouds according to the difference in absorptive characteristics between the channels. However, this method causes consistent false alarms in many cases, especially over the desert. In order to reduce these false alarms, we should eliminate the background noise originated from surface. We adopted the Background BTD (BBTD), which stands for surface characteristics on clear sky condition without any dust or cloud. We took an average of brightness temperatures of 11 and $12{\mu}m$ channels during the previous 15 days from a target date and then calculated BTD of averaged ones to obtain decontaminated pixels from dust. After defining the BBTD, we subtracted this index from BTD for the Yellow Sand Index (YSI). In the previous study, this method was already verified using the geostationary satellite, MTSAT. In this study, we applied this to the polar orbiting satellite, MODIS, to detect yellow sand dust over Northeast Asia. Products of yellow sand dust from OMI and MTSAT were used to verify MODIS YSI. The coefficient of determination between MODIS YSI and MTSAT YSI was 0.61, and MODIS YSI and OMI AI was also 0.61. As a result of comparing two products, significantly enhanced signals of dust aerosols were detected by removing the false alarms over the desert. Furthermore, the discontinuity between land and ocean on BTD was removed. This was even effective on the case of fall. This study illustrates that the proposed algorithm can provide the reliable distribution of dust aerosols over the desert even at night.

• 한국제4기학회지
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• 제14권1호
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• pp.49-55
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• 2000

10세기부터 14세기까지의 475년간의 황사 기록이 조사되었다.고려사에는 황사현상이 토우,황토우,매라는 표현으로 기록되었으며, 하늘에서 먼지가 떨어지는 것으로 '옷을 적시지 않고 흙이 있음 매 또는 토우라 부른다'라고 설명되어 있다.서운관의 관측규정(서운관지 권지일)에 토우는 '모시모경에 사방이 어둡고 혼몽하고 티끌이 내리는 것 같은 것을 말하는 것이다'라는 기록으로 보아 현대에 관측되는 황사현상과 같음을 알 수 있었다. 고려시대의 황사 관측기록은 총 50건으로 먼지현상만으로 기록된 것이 40권, 큰 바람과 연관된 기록이 5건, 황사가 비 또는 눈과 섞여 내린 사례가 3건, 안개 또는 우박과 연관된 황사가 각 1건씩 있었다. 이는 조선시대의 황사기록 57건(전영신,2000)에 비견할 만큼 많은 기록이다. 또한 고려시대에는 황사현상과 황무현상의 구분이 뚜렷하지 않았던 것으로 판단되어 황무현상의 기록도 함께 분석하였다. 황사현상은 거의 봄철에 많이 관측되었으며, 드물게는 겨울과 가을에 나타난 기록도 있었다. 한편 황사현상에 대한 해석은'임금과 신하의 도가 합하면 확연히 태평하여질 것인다 매가 어찌 있겠느냐'고 하여 황사현상이 출현한 것을 일종의 재앙으로 간주하였음도 알 수 있었다.