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Atmospheric radon levels in Beijing, China
Liguo Zhang1, Qiuju Guo, Takao Iida
1Department of Technical Physics, School of Physics, Peking University, Beijing 100871, China.
Radiation Protection Dosimetry
|October 7, 2004
Summary
Atmospheric radon concentration in Beijing averaged 14.1 Bq m(-3) in 2003, exceeding global and national levels. Seasonal and daily variations were observed, with highest radon in November and early mornings.
Area of Science:
- Environmental Science
- Radiological Health
Background:
- Atmospheric radon concentration is a key indicator of environmental radiation.
- Understanding radon levels is crucial for public health assessments, especially in urban areas.
Purpose of the Study:
- To report on atmospheric radon concentration measurements in Beijing, China.
- To analyze annual, monthly, and diurnal variations of radon levels throughout 2003.
Main Methods:
- Continuous hourly measurements of atmospheric radon concentration were conducted.
- Data collected over a full year (2003) were analyzed for average values and temporal patterns.
Main Results:
- The annual average radon concentration in Beijing was 14.1 ± 5.5 Bq m(-3), higher than world and national averages.
- Monthly variations showed a peak in November (18.5 ± 5.0 Bq m(-3)) and a minimum in May (9.9 ± 4.1 Bq m(-3)).
- Diurnal patterns revealed minimum radon levels in the late afternoon and maximum levels in the early morning hours.
Conclusions:
- Beijing's atmospheric radon concentration in 2003 was elevated compared to reference averages.
- Significant seasonal and diurnal variations in radon levels were confirmed, highlighting the need for continuous monitoring.