A time-dependent map of radon-222 flux density at the Australian land surface (July 1979-June 2010)

Radon-222, or radon is a radioactive noble gas which is exhaled by soil and rock to the atmosphere. Although commonly assumed to be constant, the land-surface flux of radon varies in space and time. This is a time-dependent map of radon-222 flux density at the Australian land surface with a spatial resolution of 0.05 degrees and temporal resolution of one month. This is a research-quality data set which is derived from a variety of measurements and model output, as there are too few radon flux measurements to generate a map directly from these. As a result, uncertainties are larger and poorly characterised when compared with maps of other quantities which can be obtained directly from measurements. Potential users are encouraged to contact the primary investigator both for guidance in applying this data set and to stay informed about upcoming revisions. The authors can also provide data for different time periods and in different formats.

氡-222（Radon-222），简称氡，是一种由土壤与岩石向大气中释放的放射性惰性气体。尽管通常被认为通量恒定，但陆地表面氡的地表通量实际存在时空差异。本数据集为澳大利亚陆地表面氡-222通量密度的时变分布图，空间分辨率为0.05度，时间分辨率为1个月。由于直接通过实测数据生成氡通量分布图所需的实测样本量过少，本数据集属于研究级数据集，整合了多类实测数据与模型输出结果。相较于可直接通过实地测量获取的其他物理量分布图，本数据集的不确定性更高且不确定性表征不够充分。我们建议潜在使用者联系首席研究员，以获取该数据集的应用指导，并同步了解后续的版本更新计划。作者还可根据需求提供不同时段、不同格式的数据集。