Yellow Dust (also Asian dust, yellow sand, yellow wind or China dust storms) is a seasonal meteorological phenomenon which affects much of East Asia sporadically during the springtime months. The dust originates in the deserts of Mongolia, northern China and Kazakhstan where high-speed surface winds and intense dust storms kick up dense clouds of fine, dry soil particles. These clouds are then carried eastward by prevailing winds and pass over China, North and South Korea, and Japan, as well as parts of the Russian Far East. Sometimes, the airborne particulates are carried much further, in significant concentrations which affect air quality as far east as the United States.
Pollutants and Dangers
Sulfur (an acid rain component), soot, ash, carbon monoxide, and other toxic pollutants including heavy metals (such as mercury, cadmium, chromium, arsenic, lead, zinc, copper) and other carcinogens, often accompany the dust storms, as well as viruses, bacteria, fungi, pesticides, antibiotics, asbestos, herbicides, plastic ingredients, combustion products as well as hormone mimicking phthalates. Though scientists have known that intercontinental dust plumes can ferry bacteria and viruses, "most people had assumed that the [sun's] ultraviolet light would sterilize these clouds," says microbiologist Dale W. Griffin, also with the USGS in St. Petersburg. "We now find that isn't true"
Effects on the Environment and People
Areas affected by the dust experience decreased visibility and the dust is known to cause a variety of health problems, not limited to sore throat and asthma in otherwise healthy people. Often, people are advised to avoid or minimize outdoor activities, depending on severity of storms. For those already with asthma or respiratory infections, it can be fatal. The dust has been shown to increase the daily mortality rate in one affected region by 1.7%.
Although sand itself is not necessarily harmful to soil, due to sulphur emissions and the resulting acid rain, the storms also destroy farmland by degrading the soil, and deposits of ash and soot and heavy metals as well as potentially dangerous biomatter blanket the ground with contaminants including croplands, aquifers, etc. The dust storms also affect wildlife particularly hard, destroying crops, habitat, and toxic metals interfering with reproduction. Coral are hit particularly hard. Toxic metals propagate up the food chain, e.g. from fish to higher mammals. Air visibility is reduced, including canceled flights, ground travel, outdoor activities, and can be correlated to significant loss of economic activity. Japan has reported washed clothes stained yellow.
Korea Times has reported it costing 3 million won (US $3,000), 6000 gallons of water, and 6 hours to simply clean one jumbo jet.[2]
Composition
An analysis of Asian Dust clouds conducted in China in 2001 showed them to contain high concentrations of silicon (24–32%), aluminum (5.9–7.4%), calcium (6.2–12%), and iron, numerous toxic substances were also present, although it is thought that heavier materials (such as poisonous mercury and cadmium from coal burning) settle out of the clouds closer to the origin.
However, Sarah O'Hara of the University of Nottingham in England, writing for the Lancet says that this doesn't mean that the effects are worse closer to the source. People further from the source of the dust are more often exposed to nearly invisible, fine dust particles that they can unknowingly inhale deep into their lungs, as coarse dust is too big to be deeply inhaled.[1] After inhalation, it can cause long term scarring of lung tissue as well as induce cancer and lung disease.
Historical Reports
Some of the earliest written records of dust storm activity are recorded in the ancient Chinese literature.[8] It is believed that the earliest Chinese dust storm record was found in the Zhu Shu Ji Nian (Chinese: 竹书纪年; English: the Bamboo Annals).[9] The record said: in the fifth year of Di Xin (1150 BC, Di xin was the Era Name of the King Di Xin of Shang Dynasty, it rained dust at Bo (Bo is a place in Henan Province in China; in Classical Chinese: 帝辛五年,雨土于亳).
The first known record of an Asian Dust event in Korea was in 174 AD during the Silla Dynasty.[10] The dust was known as "Uto (우토, 雨土)", meaning 'Raining Sands', and was believed at the time to be the result of an angry god sending down dust instead of rain or snow.
Specific records referring to Asian Dust events in Korea also exist from the Baekje, Goguryeo, and Joseon periods.
Works Cited "Asian Dust." Wikipedia. Wikimedia Foundation, 21 May 2014. Web. 25 May 2014.
Pollutants and Dangers
Sulfur (an acid rain component), soot, ash, carbon monoxide, and other toxic pollutants including heavy metals (such as mercury, cadmium, chromium, arsenic, lead, zinc, copper) and other carcinogens, often accompany the dust storms, as well as viruses, bacteria, fungi, pesticides, antibiotics, asbestos, herbicides, plastic ingredients, combustion products as well as hormone mimicking phthalates. Though scientists have known that intercontinental dust plumes can ferry bacteria and viruses, "most people had assumed that the [sun's] ultraviolet light would sterilize these clouds," says microbiologist Dale W. Griffin, also with the USGS in St. Petersburg. "We now find that isn't true"
Effects on the Environment and People
Areas affected by the dust experience decreased visibility and the dust is known to cause a variety of health problems, not limited to sore throat and asthma in otherwise healthy people. Often, people are advised to avoid or minimize outdoor activities, depending on severity of storms. For those already with asthma or respiratory infections, it can be fatal. The dust has been shown to increase the daily mortality rate in one affected region by 1.7%.
Although sand itself is not necessarily harmful to soil, due to sulphur emissions and the resulting acid rain, the storms also destroy farmland by degrading the soil, and deposits of ash and soot and heavy metals as well as potentially dangerous biomatter blanket the ground with contaminants including croplands, aquifers, etc. The dust storms also affect wildlife particularly hard, destroying crops, habitat, and toxic metals interfering with reproduction. Coral are hit particularly hard. Toxic metals propagate up the food chain, e.g. from fish to higher mammals. Air visibility is reduced, including canceled flights, ground travel, outdoor activities, and can be correlated to significant loss of economic activity. Japan has reported washed clothes stained yellow.
Korea Times has reported it costing 3 million won (US $3,000), 6000 gallons of water, and 6 hours to simply clean one jumbo jet.[2]
Composition
An analysis of Asian Dust clouds conducted in China in 2001 showed them to contain high concentrations of silicon (24–32%), aluminum (5.9–7.4%), calcium (6.2–12%), and iron, numerous toxic substances were also present, although it is thought that heavier materials (such as poisonous mercury and cadmium from coal burning) settle out of the clouds closer to the origin.
However, Sarah O'Hara of the University of Nottingham in England, writing for the Lancet says that this doesn't mean that the effects are worse closer to the source. People further from the source of the dust are more often exposed to nearly invisible, fine dust particles that they can unknowingly inhale deep into their lungs, as coarse dust is too big to be deeply inhaled.[1] After inhalation, it can cause long term scarring of lung tissue as well as induce cancer and lung disease.
Historical Reports
Some of the earliest written records of dust storm activity are recorded in the ancient Chinese literature.[8] It is believed that the earliest Chinese dust storm record was found in the Zhu Shu Ji Nian (Chinese: 竹书纪年; English: the Bamboo Annals).[9] The record said: in the fifth year of Di Xin (1150 BC, Di xin was the Era Name of the King Di Xin of Shang Dynasty, it rained dust at Bo (Bo is a place in Henan Province in China; in Classical Chinese: 帝辛五年,雨土于亳).
The first known record of an Asian Dust event in Korea was in 174 AD during the Silla Dynasty.[10] The dust was known as "Uto (우토, 雨土)", meaning 'Raining Sands', and was believed at the time to be the result of an angry god sending down dust instead of rain or snow.
Specific records referring to Asian Dust events in Korea also exist from the Baekje, Goguryeo, and Joseon periods.
Works Cited "Asian Dust." Wikipedia. Wikimedia Foundation, 21 May 2014. Web. 25 May 2014.