A historical record of the impact of nuclear activities based on 129I in coral cores in Baler, Philippines : An update

Copyright © 2020 Elsevier Ltd. All rights reserved..

In a previous study in 2016, we presented how 129I in coral cores from the east (Baler) and west (Parola) sides of the Philippines recorded the impacts of human nuclear activities, including nuclear weapons testing, nuclear fuel reprocessing, and nuclear accidents. However, the 2016 Baler dataset only had a two-year time resolution and a crude age model based on growth band counting. Here we present a new 2020 Baler 129I/127I atomic ratio dataset that features at least annual time resolution and a more accurate age model constructed using 3D X-ray Computed Tomography. Results show that the bomb peaks in Baler primarily came from the Pacific Proving Grounds or PPG with a time lag of about 1.8 years (or more specifically, between 1.3 and 2.4 years). Moreover, a review of the Parola dataset shows that PPG signals may have been transported to Parola in the West Philippine Sea via two pathways: the northward and southward bifurcations of the North Equatorial Current, reaching Parola about 4.5 and 8.5 years after detonation, respectively. Moreover, a prominent peak in the year 2014.7 in Baler possibly came from the 2011 Fukushima Accident, transported by the Kuroshio Recirculation Gyre and the North Pacific Mode Waters with a 3.5-year time lag. This study contributes to the understanding of the impact and transport of human-made radionuclides to the Philippines and the relevant oceanographic processes in the Western Equatorial Pacific region.

Medienart:

E-Artikel

Erscheinungsjahr:

2021

Erschienen:

2021

Enthalten in:

Zur Gesamtaufnahme - volume:227

Enthalten in:

Journal of environmental radioactivity - 227(2021) vom: 15. Feb., Seite 106508

Sprache:

Englisch

Beteiligte Personen:

Bautista, Angel T [VerfasserIn]
Limlingan, Sophia Jobien M [VerfasserIn]
Bauyon, Mary Margareth T [VerfasserIn]
Jagonoy, Arvin M [VerfasserIn]
Racho, Joseph Michael D [VerfasserIn]
Valdez, Jeff Darren G [VerfasserIn]
Salon, Bee Jay T [VerfasserIn]
Tabuso, Aldrin Jan E [VerfasserIn]
Valerio, John Kenneth C [VerfasserIn]
Dumalagan, Edwin E [VerfasserIn]
Kusuno, Haruka [VerfasserIn]
Siringan, Fernando P [VerfasserIn]
Matsuzaki, Hiroyuki [VerfasserIn]

Links:

Volltext

Themen:

Accelerator mass spectrometry
Iodine Radioisotopes
Iodine-129
Journal Article
Nuclear accident
Nuclear fuel reprocessing
Nuclear weapons
Water Pollutants, Radioactive

Anmerkungen:

Date Completed 27.01.2021

Date Revised 27.01.2021

published: Print-Electronic

Citation Status MEDLINE

doi:

10.1016/j.jenvrad.2020.106508

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM319037843