Data of 129I and 137Cs concentrations in suspended particulate matter dispersed in eastern Japan after the 2011 nuclear accident in Fukushima, Japan

This Excel dataset compiles 129I and 137Cs radioactivity concentrations for suspended particulate matter (SPM) dispersed in eastern Japan after the 2011 nuclear accident in Fukushima, Japan. The SPM samples were collected routinely every hour at approximately 1300 sites, of which original purpose is to measure environmental pollution levels in the air quality monitoring network of Japan. A total of 920 hourly SPM samples were measured. These samples were collected at 41 SPM sampling stations (17 sites in Fukushima, 1 site in Miyagi and 23 sites in the metropolitan area). For collecting the SPM samples, glass filter (GF) and polytetrafluoroethylene (PRFE) filters were used at 31 and 10 sites, respectively.
The excel sheet consists of 42 sheets. For the first 41 sheets, each sheet corresponds to each sampling station and is composed of 14 rows from A to N. Descriptions of these rows as follows;
A: Station code of five digits. The first two digits denote each prefecture (e.g., 05 denotes Fukushima).
B and C: Sampling time; B for date and C for sampling hour.
D and E: Data for 129I; D for activity concentration in Bq m-3 and E for corresponding error (1 sigma).
F: Quality information for the value given in row D. Quality information is summarized in Sheet 42.
G and H: Data for 137Cs; D for activity concentration in Bq m-3 and E for corresponding error (1 sigma).
I: Quality information for the value given in row G. Quality information is summarized in Sheet 42.
J and K: J for activity concentration ratios of 129I and 137Cs in Bq/Bq and K for corresponding error (1 sigma).
L: Filter material used; GF (glass fiber) or PEFE (polytetrafluoroethylene).
M and N: Location of the corresponding sampling station; M for longitude (E) and N for latitude (N).
The last 42nd sheet describes the quality information which is referred to in the rows F and I.

本Excel数据集汇编了2011年日本福岛核事故后，日本东部分散的悬浮颗粒物（SPM, suspended particulate matter）中的¹²⁹I与¹³⁷Cs放射性活度浓度数据。该SPM样本最初的采集目的是用于日本空气质量监测网络的环境污染水平测定，研究人员在约1300个监测点按小时常规采样，最终共获取920份小时级SPM样本。这些样本采集自41个SPM采样站点，其中福岛县17个、宫城县1个、大都市圈23个。采样过程中，分别有31个站点使用玻璃纤维滤膜（GF, glass filter）、10个站点使用聚四氟乙烯滤膜（PRFE, polytetrafluoroethylene）。

该Excel文件共包含42个工作表。前41个工作表分别对应一个采样站点，每个工作表由A列至N列共14列数据构成，各列含义如下：
A列：5位数字的站点编码，前两位代表所属都道府县（例如05代表福岛县）。
B列与C列：采样时间信息，其中B列为采样日期，C列为采样时刻。
D列与E列：¹²⁹I相关数据：D列为以Bq·m⁻³为单位的放射性活度浓度，E列为对应1σ标准误差。
F列：D列所对应数值的质量质控信息，相关质控说明汇总于第42号工作表。
G列与H列：¹³⁷Cs相关数据：G列为以Bq·m⁻³为单位的放射性活度浓度，H列为对应1σ标准误差。
I列：G列所对应数值的质量质控信息，相关质控说明汇总于第42号工作表。
J列与K列：¹²⁹I与¹³⁷Cs的活度浓度比值数据，其中J列为以Bq/Bq为单位的比值，K列为对应1σ标准误差。
L列：所用滤膜材质，分为GF（玻璃纤维）与PRFE（聚四氟乙烯）两类。
M列与N列：对应采样站点的地理位置信息，M列为东经经度，N列为北纬纬度。
最后一个第42号工作表用于汇总说明F列与I列所提及的质量质控信息。