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Short Citation:
Pacific Islands Fisheries Science Center, 2022: Guam coral - Bomb radiocarbon record (1939-2000), https://www.fisheries.noaa.gov/inport/item/36758.

Item Identification

Title: Guam coral - Bomb radiocarbon record (1939-2000)
Short Name: Guam coral radiocarbon record
Status: Completed
Publication Date: 2016
Abstract:

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.

Purpose:

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.

Notes:

Data set also available via the NOAA Climatic Data Center

Double Reef, Guam 60 Year Coral Bomb-Produced Radiocarbon Data

https://www.ncdc.noaa.gov/paleo/study/20346

Other Citation Details:

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)

Physical Location

Organization: Pacific Islands Fisheries Science Center
City: Honolulu
State/Province: HI
Country: USA

Data Set Information

Data Set Scope Code: Data Set
Data Set Type: Excel and SAS Dataset
Maintenance Frequency: None Planned
Data Presentation Form: Document (digital)

Support Roles

Data Steward

CC ID: 831854
Date Effective From: 2019-04-01
Date Effective To:
Contact (Person): O'Malley, Joseph M
Address: 1845 Wasp Blvd.
Honolulu, HI 96818
USA
Email Address: joseph.omalley@noaa.gov
Phone: (808)725-5741
Contact Instructions:

Contact via email

Distributor

CC ID: 380492
Date Effective From: 2016
Date Effective To:
Contact (Organization): Pacific Islands Fisheries Science Center (PIFSC)
Address: 1845 Wasp Blvd.
Honolulu, HI 96818
USA
Email Address: pifsc.info@noaa.gov
Phone: 808-725-5360
URL: https://www.pifsc.noaa.gov
Business Hours: 8:00 a.m. - 4:30 p.m.

Metadata Contact

CC ID: 380494
Date Effective From: 2016
Date Effective To:
Contact (Person): Andrews, Allen H
Address: 1845 Wasp Blvd.
Honolulu, HI 96818
USA
Email Address: allen.andrews@noaa.gov
Phone: (808)725-5373

Point of Contact

CC ID: 831855
Date Effective From: 2019-04-01
Date Effective To:
Contact (Person): O'Malley, Joseph M
Address: 1845 Wasp Blvd.
Honolulu, HI 96818
USA
Email Address: joseph.omalley@noaa.gov
Phone: (808)725-5741
Contact Instructions:

Contact via email

View Historical Support Roles

Extents

Currentness Reference: Publication Date

Extent Group 1

Extent Group 1 / Geographic Area 1

CC ID: 380497
Description

Guam, US Territory

Extent Group 1 / Time Frame 1

CC ID: 380496
Time Frame Type: Range
Start: 1939
End: 2000
Description:

Validated timeline for the coral core radiocarbon record using previously published seasonal/annual temperature changes.

Access Information

Security Class: Unclassified
Security Classification System:

NA

Security Handling Description:

NA

Data Access Policy:

NA

Data Access Procedure:

NA

Data Access Constraints:

NA

Data Use Constraints:

NA

Metadata Access Constraints:

NA

Metadata Use Constraints:

NA

Distribution Information

Distribution 1

CC ID: 380501
Download URL: https://www.ncdc.noaa.gov/paleo/study/20346
Distributor:
File Name: Guam 14C Data

Data Quality

Quality Control Procedures Employed:

Further QC after data entry.

Data Management

Have Resources for Management of these Data Been Identified?: Yes
Approximate Percentage of Budget for these Data Devoted to Data Management: Unknown
Do these Data Comply with the Data Access Directive?: No
Is Access to the Data Limited Based on an Approved Waiver?: No
If Distributor (Data Hosting Service) is Needed, Please Indicate: NCDC
Approximate Delay Between Data Collection and Dissemination: None
Actual or Planned Long-Term Data Archive Location: Other
If World Data Center or Other, Specify: NCDC
Approximate Delay Between Data Collection and Archiving: None
How Will the Data Be Protected from Accidental or Malicious Modification or Deletion Prior to Receipt by the Archive?:

PIFSC ITS performs scheduled back-ups.

Lineage

Lineage Statement:

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)

Catalog Details

Catalog Item ID: 36758
GUID: gov.noaa.nmfs.inport:36758
Metadata Record Created By: Allen H Andrews
Metadata Record Created: 2017-02-10 15:19+0000
Metadata Record Last Modified By: SysAdmin InPortAdmin
Metadata Record Last Modified: 2022-10-20 02:17+0000
Metadata Record Published: 2019-07-23
Owner Org: PIFSC
Metadata Publication Status: Published Externally
Do Not Publish?: N
Metadata Last Review Date: 2019-07-23
Metadata Review Frequency: 1 Year
Metadata Next Review Date: 2020-07-23