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Enhancements in the gamma radiation values are identified automatically by an algorithm for detection of anomalies in mean and variance as well as by visual inspection. The anomalies are typically +50% above the background level and relatively rare events (\u223c&lt;10% of the days). All the detected anomalies are associated with simultaneous precipitation events, consistent with the wet deposition of scavenged radionuclides. The enhancements are detected in the open ocean even at large distances (+500\u00a0km) from the nearest coastline. Back trajectories reveal that half of these events are associated with air masses experiencing continental land influences, but the other half do not display evidence of recent land contact. The enhancements in gamma radiation very far from land and with no evidence of continental fetch from back trajectories are difficult to explain as resulting only from radionuclides with a terrestrial source such as radon and its progeny. Further investigation and additional measurements are needed to improve understanding on the sources of ambient radioactivity in the open ocean and assess whether gamma radiation in the marine environment is influenced not only by radionuclides of terrestrial origin, but also cosmogenic radionuclides, like Beryllium\u20107, formed in the upper atmosphere but with the ability to be transported downward and serve as a tracer of the aerosols to which it attaches.<\/jats:p>","DOI":"10.1029\/2022jd037570","type":"journal-article","created":{"date-parts":[[2023,5,4]],"date-time":"2023-05-04T14:16:17Z","timestamp":1683209777000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Precipitation\u2010Driven Gamma Radiation Enhancement Over the Atlantic Ocean"],"prefix":"10.1029","volume":"128","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2198-3715","authenticated-orcid":false,"given":"Susana","family":"Barbosa","sequence":"first","affiliation":[{"name":"INESC TEC\u2014INESC Technology &amp; Science  Porto Portugal"}]},{"given":"Nuno","family":"Dias","sequence":"additional","affiliation":[{"name":"INESC TEC\u2014INESC Technology &amp; Science  Porto Portugal"},{"name":"ISEP Instituto Superior de Engenharia do Porto  Porto Portugal"}]},{"given":"Carlos","family":"Almeida","sequence":"additional","affiliation":[{"name":"INESC TEC\u2014INESC Technology &amp; Science  Porto Portugal"},{"name":"ISEP Instituto Superior de Engenharia do Porto  Porto Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1538-2836","authenticated-orcid":false,"given":"Guilherme","family":"Silva","sequence":"additional","affiliation":[{"name":"INESC TEC\u2014INESC Technology &amp; Science  Porto Portugal"},{"name":"ISEP Instituto Superior de Engenharia do Porto  Porto Portugal"}]},{"given":"Ant\u00f3nio","family":"Ferreira","sequence":"additional","affiliation":[{"name":"INESC TEC\u2014INESC Technology &amp; Science  Porto Portugal"},{"name":"ISEP Instituto Superior de Engenharia do Porto  Porto Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9122-2885","authenticated-orcid":false,"given":"Ant\u00f3nio","family":"Camilo","sequence":"additional","affiliation":[{"name":"CINAV Marinha  Lisboa Portugal"}]},{"given":"Eduardo","family":"Silva","sequence":"additional","affiliation":[{"name":"INESC TEC\u2014INESC Technology &amp; Science  Porto Portugal"},{"name":"ISEP Instituto Superior de Engenharia do Porto  Porto Portugal"}]}],"member":"13","published-online":{"date-parts":[[2023,5,11]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1002\/2017SW001610"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF00115244"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","unstructured":"Barbosa S. 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