noaa-coral-13157 Coral reef accretion rates and marine reservoir ages in Pacific Panama Toth, L.T.; Aronson, R.B.; Vollmer, S.V.; Hobbs, J.W.; Urrego, D.H.; Cheng, H.; Enochs, I.C.; Combosch, D.J.; van Woesik, R.; Macintyre, I.G. Coral reef accretion rates and marine reservoir ages in Pacific Panama 2012-08-20 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/13157 Investigator L.T. Toth Investigator R.B. Aronson Investigator S.V. Vollmer Investigator J.W. Hobbs Investigator D.H. Urrego Investigator H. Cheng Investigator I.C. Enochs Investigator D.J. Combosch Investigator R. van Woesik Investigator I.G. Macintyre earth science paleoclimate corals and sclerosponges age at sample end,null,null,calendar year before present,null,corals and sclerosponges,null,null,N,null earth science paleoclimate corals and sclerosponges age at sample start,null,null,calendar year before present,null,corals and sclerosponges,null,null,N,null earth science paleoclimate corals and sclerosponges notes,null,null,null,null,corals and sclerosponges,null,null,C,null earth science paleoclimate corals and sclerosponges extension rate,coral,null,meter per kiloyear,null,corals and sclerosponges,null,null,N,the rate of linear growth averaged across a coral reef earth science paleoclimate corals and sclerosponges physical properties earth science paleoclimate corals and sclerosponges age control geoscientificInformation ENSO 6883 cal yr BP 0 cal yr BP Complete 7.40035 8.631566 -81.58237 -79.028331 Ocean Pacific Ocean Eastern Pacific Ocean Contadora Island>LATITUDE 8.631566>LONGITUDE -79.028331 Ocean Pacific Ocean Eastern Pacific Ocean Iguana Island>LATITUDE 7.62699>LONGITUDE -80.00093 Ocean Pacific Ocean Eastern Pacific Ocean Canales de Tierra Island>LATITUDE 7.40035>LONGITUDE -81.58237 None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII Toth, L.T., R.B. Aronson, S.V. Vollmer, J.W. Hobbs, D.H. Urrego, H. Cheng, I.C. Enochs, D.J. Combosch, R. van Woesik, and I.G. Macintyre. 2012. ENSO drove 2500-year collapse of eastern Pacific coral reefs. Science, 337:81-84. doi: 10.1126/science.1221168.

Cores of coral reef frameworks along an upwelling gradient in Panamá show that reef ecosystems in the tropical eastern Pacific collapsed for 2500 years, representing as much as 40% of their history, beginning about 4000 years ago. The principal cause of this millennial-scale hiatus in reef growth was increased variability of the El Niño–Southern Oscillation (ENSO) and its coupling with the Intertropical Convergence Zone. The hiatus was a Pacific-wide phenomenon with an underlying climatology similar to probable scenarios for the next century. Global climate change is probably driving eastern Pacific reefs toward another regional collapse. STUDY NOTES: This data set includes calculated rates of vertical reef accretion and local reservoir corrections from coral reef cores collected in Pacific Panama. The cores were collected at three sites: Contadora Island, which experiences strong seasonal upwelling, Iguana Island where upwelling is intermediate, and Canales de Tierra Island, where there is no upwelling. Age models were created for each core using a combination of radiocarbon dating by standard methodologies, radiocarbon dating using accelerator mass spectrometry (AMS), and U/Th dating using inductively coupled plasma mass spectrometry (ICP-MS). Accretion rates were calculated by dividing the length of a given interval in a core by its time-span (typically using radiocarbon ages calibrated using the local reservoir correction). These data are presented in relation to a long-term depositional hiatus that occurred at all three sites from ~4100-1600 cal BP. To calculate the local reservoir correction at each site during the mid-to-late Holocene, individual corals from each site were sampled. These corals were split and one half was radiocarbon dated using AMS and the other half was U/Th dated using ICP-MS. Radiocarbon ages are strongly influenced by the local reservoir correction (Delta R), which is in turn influenced by the regional upwelling regime. Conversely, marine U/Th dates provide a better approximation of the 'true age' of a sample. Subtracting the U/Th age from the radiocarbon age gives an estimate of the total reservoir age, R. The U/Th age of each sample was used to determine expected radiocarbon age for that time based on the standard marine calibration curve. Delta R is calculated by subtracting the expected radiocarbon age from the measured radiocarbon age of the sample. Delta R provides a measure of each locality's deviation from the global reservoir correction, allowing for more accurate calibration of radiocarbon ages. This information is also useful in reconstructing local paleoceanography.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/coral/east_pacific/toth2012.xls GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/coral/east_pacific/toth2012.txt USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11