Radon continuous observation on the sea surface atmosphere by using the high sensitive radon detector

高灵敏氡气探测器对海面大气氡气连续观测

• 批准号: 16310007
• 负责人: MATSUBARA Masaya
• 金额: $ 3.9万
• 依托单位: Gifu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2004
• 资助国家: 日本
• 起止时间: 2004 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-16310007/
• 关键词: radon; high sensitive radon detector; radon continuous observation; atmospheric radon on sea surface; ice breaker SHIRASE; Antarctic Ocean; SYOWA station; atmospheric transport model

Continuous measurements of the atmospheric radon have been made in the ice breaker SHIRASE by the use of the high sensitive radon detector upon the Japan Sea from Monbetsu to Tottri(13 Sep.2004- 17 Sep.) and the Antarctic Ocean from Fremantle via SYOWA station to Sydney(13 Dec.2004 - 18 Mar.2005). The observation results of the radon will be expected to contribute for the development of the atmospheric long-range transport model to Antarctica from the other continents, South America and Africa. The results are summarized as follows.1) The observed minimum background level 0.02Bqm-^3 of the atmospheric radon concentration upon the Antarctic Ocean corresponds with the simulation results from the ocean atmospheric flux of radon 0.01Rncm-^2s^<-1>.2) The rapid increasing events of the radon concentration (radonic storm) were observed 6 events on the Antarctic Ocean. The radonic storm detection on 25-Feb 2005 was success to the parallel observation with the SYOWA station and SHIRASE, which w … More as shipped offshore Amundsen Gulf far 500km from SYOWA. Two observation points were located on the front of the depression from the NOAA satellite photographs. This radonic storm event turned out to be transport from the South America to SOYWA station with the one week by the comparison with the observation data and evaluated data of the Atmospheric transport model. The observation arrival time was coincident with the evaluation time of the model, but the radon concentrations were different with the observations, SHIRASE 0.145Bqm^<-3> and SYOWA 0.085Bqm^<-3> and evaluation 0.024Bqm^<-3>. The model failed to simulate the amplitudes of radonic storm events at SYOWA station. These high concentration events were possibly a result of filament-like horizontal structure or laminated vertical structure. The improvement of the model was expected for the radonic storm events. These radon observation results on the Antarctic Ocean will be contributed to the development of the atmospheric long-range transport model Less

通过使用高灵敏的ra探测器到日本海，从Monbetsu到Tottri（2004年9月13日至9月13日）在日本海上使用高灵敏的ra探测器，从冰破的shirase（2004年9月13日至9月13日）和从弗雷曼特尔（Syowa）的弗雷曼特尔（Syowa）站到锡德尼（Sydney）（2004年12月18日至18年3月13日），通过使用高灵敏的ra探测器（2004年9月13日至9月13日），通过使用高灵敏的ra探测器到日本海（2004年9月13日至18月18日至18年3月13日），对大气ra进行了连续测量。预计ra的观察结果将有助于从其他大陆，南美和非洲向南极向南极的大气远程运输模型的发展做出贡献。结果总结如下。1）在南极海洋上观察到的最低背景水平0.02BQM-^3与rADON 0.01RNCM-^2S^2S^2S^<-1> .2的海洋大气通量产生的模拟相对应，这是radon浓度的迅速增加（放射线暴风雨）的迅速增长事件。在2005年25-FEB上进行的Radinic风暴检测成功地与Syowa站和Shirase的平行观察成功，这是在距离Syowa远500公里的海上Amundsen Gulf运输时。 NOAA卫星照片的凹陷前面有两个观测点。通过与观察数据和评估大气传输模型的数据进行比较，这场无线电风暴事件是从南美运输到大豆站的运输。观察到的到达时间与模型的评估时间一致，但是ra浓度与观测值不同，shirase 0.145bqm^<-3>和syowa 0.085bqm^<-3>和评估0.024BQM^<-3>。该模型未能模拟Syowa站的放射性风暴事件的放大器。这些高浓度事件可能是丝状水平结构或层压垂直结构的结果。预计辐射风暴事件的模型会改善。这些在南极海洋上的ra观察结果将有助于大气远程传输模型的发展