L <- lipdR::readLipd("https://lipdverse.org/data/STfvZZbTivYEfORIuIGG/1_0_5/CO02KUBE.lpd")
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iso2k-1_1_2
archiveType: Coral
originalDataUrl: https://www.ncdc.noaa.gov/paleo/study/1872
lipdVersion: 1.3
dataContributor: KHK, Sircar, Triranta
author: list(name = "Kuhnert, Henning , Patzold, Jorgen , Schnetger, Bernhard , Wefer, Gerold")
citeKey: kuhnert2002sea
journal: Palaeogeography, Palaeoclimatology, Palaeoecology
volume: 179
pages: -12
title: Sea-surface temperature variability in the 16th century at Bermuda inferred from coral records
doi: 10.1016/S0031-0182(01)00410-2
author: list(name = "Kuhnert, H.")
title: Ocean2kHR-AtlanticBermudaKuhnert2002
latitude: 32.47
longitude: -64.7
elevation: -11
siteName: North East Breakers, Bermuda
pages2kRegion: Ocean
TSid: MAT40723aa780
variableName: year
units: yr AD
description: Year AD
rank: NA
scope: climate
TSid: Ocean2kHR_102_iso2k
variableName: d18O
units: permil
description: carbonate
useInGlobalTemperatureAnalysis: TRUE
basis: The mean annual cycles of d18O and the Sr/Ca ratios suggest temperature amplitudes of only 40-50% of the 8.4i¿½C in recent temperatures. The results indicated by the proxies appear unrealistically low, and we believe that the data sets do not capture the full annual amplitude, despite a sampling resolution of more than 12 samples per annual skeletal growth increment.
direction: decrease
interpDirection: decrease
scope: climate
seasonality: subannual
variable: temperature
variableDetail: sea surface
variableGroup: Temperature
variableGroupDirection: negative
variableGroupOriginal: T
variableOriginal: temperature
scope: climate
scope: climate
basis: This coral was not directly calibrated since the top is not modern. They used other calibrations (Porites), and not from Diploria labyrinthiformis. Using more recent Goodkin calibration would be applicable to this coral. "we used calibrations from the Atlantic and Pacific Oceans. For estimating temperatures from coral skeletal d18O we used the gradient of the temperature to N18O equation of Leder et al. (1996) obtained from Florida corals (4.52i¿½C per mil in d18O).
coefficient: NA
direction: negative
fraction: NA
inferredMaterial: seawater
integrationTime: ~15 samples/year
integrationTimeBasis: The top and base of the core section were U/Th-dated (measured at the Institut fur Umweltphysik, Heidelberg, Germany), with a precision of �15 yr. The midpoint of the top dated sample is 14 density band couplets above the profile for geochemical measurements, and the midpoint of the bottom dated sample is seven band couplets below the profile (Fig. 2). In other words, the age model within the chronology is based on the annual banding. According to band couplet counts and the number of annual cycles in the d18O, the U/Th-dated sections differ in age by 104 yr, while the difference is 130 yr according to their radiometric dates (base: 1499, top: 1629 AD). To remove the surplus of 26 yr we adjusted the radiometric ages by adding 13 yr to the bottom and subtracting 13 yr from the top sample age. Therefore, individual years in our record are correct with respect to their positions within the time series, but they do not necessarily match calendar years. Years in the isotopic record are defined by cyclic variations in d18O, which are assumed to be annual, with each cycle spanning ca. 2.5-4 mm core length. Subannual dating is based on the annual d18O cycles, where the most positive d18O value in each cycle is assigned to the coldest average month, which, for Bermuda, is March. This introduces a non-cumulative error of approximately �1 month. The ages of other sampling points were linearly interpolated according to their spatial distances along the sampling profile.
integrationTimeUncertainty: 15 years interannual and 1 month subannual
integrationTimeUncertaintyType: U-Th dating uncertainty
integrationTimeUnits: Varies needs to be interpolated
mathematicalRelation: linear
rank: 1
scope: isotope
seasonality: subannual
variable: temperature
variableGroup: Temperature
variableGroupDirection: negative
variableGroupOriginal: T_water
coefficient: NA
fraction: NA
rank: NA
scope: isotope
coefficient: NA
fraction: NA
rank: NA
scope: isotope
TSid: MATd5acec6c03
variableName: year
units: yr AD
description: Year AD
rank: NA
scope: climate
TSid: Ocean2kHR_103_iso2k
variableName: Sr/Ca
units: mmol/mol
description: carbonate
useInGlobalTemperatureAnalysis: FALSE
direction: decrease
interpDirection: decrease
scope: climate
seasonality: subannual
variable: temperature
variableDetail: sea@surface
variableDetailOriginal: sea_surface
variableGroup: Temperature
variableGroupDirection: negative
variableGroupOriginal: T
variableOriginal: temperature
scope: climate
scope: climate
coefficient: NA
fraction: NA
inferredMaterial: seawater
rank: NA
scope: isotope
coefficient: NA
fraction: NA
rank: NA
scope: isotope
coefficient: NA
fraction: NA
rank: NA
scope: isotope
root
pub
pub1
pub2
geo
PaleoData columns
year (yr AD) [1-1]
interpretation
1
d18O (permil) [1-1]
interpretation
1
2
3
4
5
6
year (yr AD) [2-1]
interpretation
1
Sr/Ca (mmol/mol) [2-1]
interpretation
1
2
3
4
5
6