Department of Science and Technology (Philippines) - Philippine Nuclear Research Institute (DOST-PNRI), Commonwealth Ave., Diliman, Quezon City 1101, Philippines.
International Centre for Water Hazard and Risk Management (ICHARM), Public Works Research Institute (PWRI), 1-6 Minamihara, Tsukuba-shi, Ibaraki-ken 305-8516, Japan.
Sci Total Environ. 2022 Mar 10;811:152407. doi: 10.1016/j.scitotenv.2021.152407. Epub 2021 Dec 13.
One recent way of reconstructing the historical impact of aboveground nuclear weapons testing (ANWT) in places lacking historical data is by measuring I in natural archives such as coral cores. However, discussions arising from I in corals remain qualitative or semi-quantitative, which do not maximize the potential information derivable from the data. In this study, we construct a mathematical model that simulates the I bomb peaks from the Pacific Proving Grounds (PPG) tests, as observed in available coral core data from the east (Baler) and west (Parola) sides of the Philippines. Results show that the model can determine the expected increase in I/I ratio in the Philippines per megaton of ANWT detonated in the PPG; confirm time lags for each major transport pathway from the PPG to the Philippines, indicating when to expect the radioactivity spike after detonation; and determine the most significant transport pathway from the PPG to each coral location. This work increases the application and significance of I/I coral core data by deriving quantitative information about the magnitude, timing, and transport pathways of radioactivity from the ANWT site to the coral location. In the future, the model can be expanded to simulate other I sources besides ANWT.
一种最近重建缺乏历史数据地区地上核爆炸试验（ANWT）历史影响的方法是通过测量天然档案中的 I 来实现，如珊瑚芯。然而，珊瑚中 I 的讨论仍然是定性或半定量的，这并没有最大限度地利用数据中可获得的潜在信息。在这项研究中，我们构建了一个数学模型，模拟了从太平洋试验场（PPG）测试中观察到的可用珊瑚芯数据中菲律宾东部（巴利尔）和西部（帕罗拉）的 I 炸弹峰。结果表明，该模型可以确定在 PPG 中每引爆一吨 ANWT 对菲律宾 I/I 比值的预期增加；确认从 PPG 到菲律宾的每个主要输运途径的时间滞后，表明在爆炸后何时预期放射性物质的峰值；并确定从 PPG 到每个珊瑚位置的最重要的输运途径。这项工作通过从 ANWT 地点到珊瑚位置导出放射性物质的大小、时间和输运途径的定量信息，增加了 I/I 珊瑚芯数据的应用和意义。在未来，该模型可以扩展到模拟除 ANWT 之外的其他 I 源。
