gov.noaa.nmfs.inport:36758
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Pacific Islands Fisheries Science Center
808-725-5300
1845 Wasp Blvd.
Honolulu
HI
96818
USA
http://www.pifsc.noaa.gov
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2024-02-29T00:00:00
ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data
ISO 19115-2:2009(E)
Guam coral - Bomb radiocarbon record (1939-2000)
Guam coral radiocarbon record
2016
publication
NOAA/NMFS/EDM
36758
https://www.fisheries.noaa.gov/inport/item/36758
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Full Metadata Record
View the complete metadata record on InPort for more information about this dataset.
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Publication:
Andrews, A.H., R. Asami, Y. Iryu, D.R. Kobayashi, and F. Camacho. 2016. Bomb-produced radiocarbon in the western tropical Pacific Ocean—Guam coral reveals operation-specific signals from the Pacific Proving Grounds. Journal of Geophysical Research – Oceans 121: 6351-6366 (dx.doi.org/10.1002/2016JC012043)
High-resolution radiocarbon (14C) analyses on a coral core extracted from Guam, a western tropical Pacific island, revealed a series of early bomb-produced 14C spikes. The typical marine bomb 14C signal—phase lagged and attenuated relative to atmospheric records—is present in the coral and is consistent with other regional coral records. However, 14C levels well above what can be attributed to air-sea diffusion alone punctuate this pattern. This anomaly was observed in other Indo-Pacific coral records, but the Guam record is unmatched in magnitude and temporal resolution. The Guam coral ¿14C record provided three spikes in 1954–55, 1956–57, and 1958–59 that are superimposed on a normal 14C record. Relative to mean pre-bomb levels, the first peak rises an incredible ~700‰ and remained elevated for ~1.2 years. A follow up assay with finer resolution increased the peak by ~300‰. Subsequent spikes were less intense with a rise of ~35‰ and ~70‰. Each can be linked to thermonuclear testing in the Pacific Proving Grounds at Bikini and Enewetak atolls in Operations Castle (1954), Redwing (1956), and Hardtack I (1958). These 14C signals can be explained by vaporization of coral reef material in the nuclear fireball, coupled with neutron activation of atmospheric nitrogen (14C production), and subsequent absorption of 14CO2 to form particulate carbonates of close-in fallout. The lag time in reaching Guam and other coral records abroad was tied to ocean surface currents and modeling provided validation of 14C arrival observations.
Establish a comprehensive bomb radiocarbon reference for use in age validation of regional marine organisms and to explain the oceanographic propagation of the signal through the western Pacific Ocean.
completed
Schemmel, Eva M
eva.schemmel@noaa.gov
Contact via email.
pointOfContact
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DOC/NOAA/NMFS/PIFSC > Pacific Islands Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce
dataCentre
Global Change Master Directory (GCMD) Data Center Keywords
2017-04-24
publication
8.5
Life History Program
project
InPort
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Cite As: Pacific Islands Fisheries Science Center, [Date of Access]: Guam coral - Bomb radiocarbon record (1939-2000) [Data Date Range], https://www.fisheries.noaa.gov/inport/item/36758.
NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
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Access Constraints: NA
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unclassified
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NOAA Data Management Plan (DMP)
NOAA/NMFS/EDM
36758
https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/pifsc/dmp/pdf/36758.pdf
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NOAA Data Management Plan (DMP)
NOAA Data Management Plan for this record on InPort.
information
crossReference
eng; US
oceans
Guam, US Territory
Validated timeline for the coral core radiocarbon record using previously published seasonal/annual temperature changes. | Currentness: Publication Date
1939
2000
Pacific Islands Fisheries Science Center
808-725-5360
1845 Wasp Blvd.
Honolulu
HI
96818
pifsc.info@noaa.gov
https://www.pifsc.noaa.gov
WWW:LINK-1.0-http--link
Pacific Islands Fisheries Science Center Website
Pacific Island Fisheries Science Center homepage
information
8:00 a.m. - 4:30 p.m.
distributor
https://www.ncdc.noaa.gov/paleo/study/20346
WWW:LINK-1.0-http--link
Guam 14C Data
download
dataset
See publication:
Andrews, A.H., R. Asami, Y. Iryu, D.R. Kobayashi, and F. Camacho. 2016. Bomb-produced radiocarbon in the western tropical Pacific Ocean—Guam coral reveals operation-specific signals from the Pacific Proving Grounds. Journal of Geophysical Research – Oceans 121: 6351-6366 (dx.doi.org/10.1002/2016JC012043)
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Access Constraints: NA | Use Constraints: NA