Record heavy Asian dust in Beijing in 2002: Observations and model analysis of recent events

Sugimoto, Naoki; Uno, Itsushi; Nishikawa, Masataka; Shimizu, Atsushi; Matsui, Ichiro; Dong, Xiao; Yan, Chao; Hao, Qing

doi:10.1029/2002gl016349

Cited by 187 publications

(161 citation statements)

References 15 publications

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“…We categorized the kosa concentration into five grades as follows: Grade 1, equated to 0 μg/m 3 ; Grade 2, 0-10 μg/m 3 ; Grade 3, 10-30 μg/m 3 ; Grade 4, 30-100 μg/m 3 ; and Grade 5, over 100 μg/m 3 . It was reported that the standard threshold of the dust concentration for an Asian dust day was 100 μg/m 3 (Sugimoto et al, 2003). Besides these days, the typical kosa days were identified as increase in the LIDAR signal of more than 30μg/m 3 in this study period.…”

Section: Discussionmentioning

confidence: 86%

Effects of Asian dust on daily cough occurrence in patients with chronic cough: A panel study

Higashi

Kambayashi

Ohkura

et al. 2014

Atmospheric Environment

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AbbreviationsTotal suspended particulate (TSP); Particulate matter (PM); particulate matter with an aerodynamic diameter of less than 2.5 μm (PM 2.5 ); Light detection and ranging (LIDAR) Keywords Asian dust; Kosa; Chronic cough; Daily cough symptom; PM 2.5 1 ABSTRACTAsian dust, known as kosa in Japanese, is a major public health concern. In this panel study, we evaluated the effects of exposure to kosa on daily cough occurrence. The study subjects were 86 patients being treated for asthma, cough variant asthma, or atopic cough in

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Section: Discussionmentioning

confidence: 86%

Effects of Asian dust on daily cough occurrence in patients with chronic cough: A panel study

Higashi

Kambayashi

Ohkura

et al. 2014

Atmospheric Environment

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“…The LIDAR system distinguishes between mineral dust particles, including Asian dust, and other spherical particles by identifying differences in the shapes of the particles (Sugimoto et al, 2003). Recently, some epidemiological studies have used LIDAR data to evaluate the health effects of Asian dust.…”

Section: Discussionmentioning

confidence: 99%

“…We averaged 24 h data, obtained from the atmosphere 1 km above the ground at the Toyama observation station (Imizu City, Toyama Prefecture, Japan) which is approximately 40 km east of Kanazawa City. The standard threshold of the dust extinction coefficient for a Asian dust day was 0.1/km (Sugimoto et al, 2003). The Japan Meteorological Agency identifies a Asian dust day (the occurrence of a Asian dust event)…”

Section: Definition Of the Asian Dust And Non-asian Dust Periodsmentioning

confidence: 99%

Exacerbation of daily cough and allergic symptoms in adult patients with chronic cough by Asian dust: A hospital-based study in Kanazawa

Higashi

Kambayashi

Ohkura

et al. 2014

Atmospheric Environment

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AbbreviationsTotal suspended particulate (TSP); Particulate matter (PM); Light detection and ranging (LIDAR); Polycyclic aromatic hydrocarbons (PAHs) 1 AbstractThe health effects associated with Asian dust have attracted attention due to the rapid increase in the number of Asian dust events in East Asia in recent years. The aim of this study was to investigate the associations between Asian dust and daily cough, as well as allergic symptoms, in adult patients who suffer from chronic cough. We enrolled 86 adult patients from Kanazawa University Hospital, Japan, who were diagnosed with asthma, cough variant asthma, atopic cough or a combination of these conditions. From January to June 2011, subjects recorded their symptoms in a diary every day. Asian dust and non-Asian dust periods were defined according to the dust extinction coefficient, measured using the light detection and ranging (LIDAR). The daily levels of total suspended particulates, polycyclic aromatic hydrocarbons (PAHs) and coexisting factors related to allergies, such as the Japanese cedar pollen count, were measured.McNemar's test showed that there were significantly more cough-positive patients during Asian dust periods than during the non-Asian dust period (p = 0.022). In addition, during Asian dust periods when the daily levels of Japanese cedar pollen, Japanese cypress pollen and PAHs were elevated, there were significantly more patients who experienced itchy eyes than during the non-Asian dust period (p < 0.05). On the other hand, there were no significant differences in the allergic symptoms, including sneezing or a runny nose and nasal congestion. This is the first report to show that Asian dust triggers cough and allergic symptoms in adult patients with chronic cough.

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“…Because the depolarization ratio is available, the lidar data can provide us the information on non-spherical particles such as dust particles (e.g., Shimizu et al 2004;Osada et al 2011;Yasunari et al 2016). We use the calculated dust and spherical extinction coefficients of the lidar data (Sugimoto et al 2003;Shimizu et al 2004) at Takikawa to confirm Kosa (dust) transports there (also see SI Text).…”

Section: Introductionmentioning

confidence: 99%

An Unreported Asian Dust (Kosa) Event in Hokkaido, Japan: A Case Study of 7 March 2016

Yasunari

Niwano²,

Fujiyoshi

et al. 2017

SOLA

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Monitoring particulate matter is essential to alert the public about health risks. The Terra/MODIS true color image clearly captured a yellow band over Hokkaido prefecture in Japan on 7 March 2016. We investigated whether this event was an Asian dust (Kosa) transport or not with the ground-based observations in Sapporo and Takikawa in Hokkaido and NASA's MERRA-2 re-analysis data. The timing of increased particle number concentrations (PNCs; greater than 0.5 μm) was clearly measured by a low-cost aerosol sensor at Sapporo and Takikawa in the early afternoon. For this particle size range, the PNC by this aerosol sensor had greater agreement with another commercial instrument for the 1-hourly mean data. The lidar data at Takikawa and NASA's AERONET at Sapporo also implied the increased dust particles (i.e., dominance of non-spherical and coarse particles, respectively), which supported that the PNC increase was due to the dust transport. The hourly PM 2.5 data in Sapporo significantly increased in the evening rather than around the noon to early afternoon. We concluded that this event was judged as an Asian dust (Kosa) event in Hokkaido starting from the early afternoon, which was, however, not reported by Japan Meteorological Agency (JMA) based on their visible observations.(Citation: Yasunari, T.

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Record heavy Asian dust in Beijing in 2002: Observations and model analysis of recent events

Cited by 187 publications

References 15 publications

Effects of Asian dust on daily cough occurrence in patients with chronic cough: A panel study

Effects of Asian dust on daily cough occurrence in patients with chronic cough: A panel study

Exacerbation of daily cough and allergic symptoms in adult patients with chronic cough by Asian dust: A hospital-based study in Kanazawa

An Unreported Asian Dust (Kosa) Event in Hokkaido, Japan: A Case Study of 7 March 2016

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