The simulation of long-range transport of 137Cs from East Asia to Japan in 2002 and 2006

Kido, Hiroko; Fujiwara, Hideshi; Jamsran, Undarmaa; Endô, Akira

doi:10.1016/j.jenvrad.2011.08.011

Cited by 5 publications

(2 citation statements)

References 17 publications

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“…Other possible sources include global fallout from previous nuclear tests. Previous studies have already confirmed that Asian dust is involved in the variability of Cs-137 atmospheric fallout in Japan (e.g., Fujiwara et al, 2007;Kido et al, 2012).…”

Section: Introductionmentioning

confidence: 90%

Cs-137 detection at CTBT radionuclide monitoring stations in East Asia

Furuno,

Ohmori,

Tateoka

et al. 2024

Preprint

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The Comprehensive Nuclear-Test-Ban Treaty (CTBT) Okinawa radionuclide monitoring station (JPP37) is located on a hill facing the East China Sea at the center of the main island of Okinawa. It occasionally detects Cs-137, although no nuclear facilities are located on the island. This study focused on the detection of Cs-137 at JPP37 and examined the ratio of simultaneous detections at neighboring stations and the relationship with Asian dust from inland East Asia. The detection of Cs-137 from 2020 to 2023 at JPP37, which was the target of the analysis, was higher in the spring. Among the nine CTBT radionuclide stations in East Asia, the detections in Beijing, Lanzhou, and Ulaanbaatar, Mongolia, were also high in spring. This suggested a high association with the detection of Asian dust in East Asia. Thus, we confirmed the detection of Cs-137 at nine nearby international monitoring system (IMS) of Comprehensive Nuclear-Test-Ban Treaty Preparatory Organization (CTBTO) stations when Asian dust was observed at any of the sites in Japan. In addition, we observed that the detection rates were high in Takasaki, Beijing, Lanzhou, and Ulaanbaatar. It can be inferred that the Cs-137 observed mainly in spring at the IMS particle radionuclide station in the East Asian region around Japan was likely to pick up the effects of global fallout conveyed by Asian dust. Thereafter, we conducted a preliminary source estimation analysis for Asian dust arrival near Japan. Atmospheric dispersion simulations explained the detection of Cs-137 at nearby IMS particle radionuclide stations, assuming that Cs-137 was emitted from the desert, the source of the Asian dust.

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Section: Introductionmentioning

confidence: 90%

Cs-137 detection at CTBT radionuclide monitoring stations in East Asia

Furuno,

Ohmori,

Tateoka

et al. 2024

Preprint

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“…Examples of HYPACT model applications can be found in [51][52][53][54][55][56][57][58]. Unfortunately, it is not possible to take in account the radiation balance changes induced by a large amount of wildfire aerosol in the current RAMS/HYPACT model version.…”

Section: Dispersion Modelmentioning

confidence: 99%

Severe Wildfires Near Moscow, Russia in 2010: Modeling of Carbon Monoxide Pollution and Comparisons with Observations

Safronov¹,

Fokeeva²,

Rakitin³

et al. 2014

Remote Sensing

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Abstract:The spatial and temporal distributions of the carbon monoxide (CO) concentration were calculated with the Regional Atmospheric Modeling System and Hybrid Particle and Concentration Transport model (RAMS/HYPACT) in the provinces near Moscow during the abnormally hot summer of 2010. The forest, steppe and meadow hot spots were defined by the satellite data MCD14ML (MODIS Terra and Aqua satellite data). The calculations indicated that the surface CO concentrations from the model were two times less than the experimental data obtained from the Moscow State University ataset. The M and Zvenigorod Scientific Station (ZSS). Conversely, the total column CO concentrations obtained from the model were two to three times larger than the experimental values obtained from the Obukhov Institute of Atmospheric Physics (OIAP) and ZSS stations. The vertical transfer of pollutants was overestimated. Tentatively, it could be assumed that an aerosol influence in the model calculations is a reason for the overestimation. The comparisons between the wind speed, temperature and humidity profiles calculated in the model with the data from the standard balloon sounding exhibited good agreement. The CO total column data of the Measurements of Pollution in the Troposphere (MOPITTv5 NIR and TIR/NIR) obtained from the OIAP and ZSS stations appear more realistic than do the MOPITTv4 data. However, the surface MOPITT values of CO concentration for Moscow have the large distinction from the ground measurements. OPEN ACCESSRemote Sens. 2015, 7 396A careful proposal regarding satellite orbit optimization was made, which could improve future spectrometric measurements, such as the MOPITT, Atmospheric Infrared Sounder (AIRS) and Infrared Atmospheric Sounding Interferometer (IASI) measurements.

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