Originally (years b2k). Subtracted -50 to give pre 1950 dates
NA; paleoData_isPrimary has been standardized; paleoData_datum has been standardized
interpreted as Aleutian low (winter; negative direction)
NA; paleoData_summaryStatistic has been standardized; paleoData_inferredMaterial has been standardized
NA; paleoData_summaryStatistic has been standardized
uncertaintyHigh (WEB11da3cb6): paleoData_isPrimary: '' has been replaced by 'FALSE'
uncertaintyHigh (WEB11da3cb6): paleoData_primaryAgeColumn: '' has been replaced by 'FALSE'
uncertaintyLow (WEB17ebd812): paleoData_isPrimary: '' has been replaced by 'FALSE'
uncertaintyLow (WEB17ebd812): paleoData_primaryAgeColumn: '' has been replaced by 'FALSE'
accumulation (WEB29098c59): paleoData_isPrimary: '' has been replaced by 'FALSE'
accumulation (WEB29098c59): paleoData_primaryAgeColumn: '' has been replaced by 'FALSE'
age (WEBc000fbdd): paleoData_primaryAgeColumn: '' has been replaced by 'TRUE'
uncertainty2s (WEBc36b0a99): paleoData_isPrimary: '' has been replaced by 'FALSE'
uncertainty2s (WEBc36b0a99): paleoData_primaryAgeColumn: '' has been replaced by 'FALSE'
depthBottom (WEBfae83f38): paleoData_isPrimary: '' has been replaced by 'FALSE'
depthBottom (WEBfae83f38): paleoData_primaryAgeColumn: '' has been replaced by 'FALSE'
accumulation (WEB29098c59): calibration_seasonality: 'uncalibrated' has been replaced by ''
originalDataUrl: '' has been replaced by 'https://www.iceandclimate.nbi.ku.dk/data/'
accumulation (WEB29098c59): interpretation1_variableDetail: 'precipitation@surface' has been replaced by 'amount@surface'
Updated lipdverse database entry with a changed file.
geo_elevation: '' has been replaced by '2450'
accumulation (WEB29098c59): paleoData_notes: 'null' has been replaced by ''
accumulation (WEB29098c59): paleoData_notes: '' has been replaced by 'null'
uncertaintyHigh (WEB11da3cb6): paleoData_variableName: 'Acc max' has been replaced by 'uncertaintyHigh'
uncertaintyHigh (WEB11da3cb6): paleoData_inferredMaterial: '' has been replaced by 'accumulation'
uncertaintyHigh (WEB11da3cb6): paleoData_notes: '' has been replaced by 'NA; paleoData_summaryStatistic has been standardized; paleoData_inferredMaterial has been standardized'
uncertaintyHigh (WEB11da3cb6): paleoData_summaryStatistic: '' has been replaced by 'max'
uncertaintyLow (WEB17ebd812): paleoData_variableName: 'Acc min' has been replaced by 'uncertaintyLow'
uncertaintyLow (WEB17ebd812): paleoData_inferredMaterial: '' has been replaced by 'accumulation'
uncertaintyLow (WEB17ebd812): paleoData_notes: '' has been replaced by 'NA; paleoData_summaryStatistic has been standardized; paleoData_inferredMaterial has been standardized'
uncertaintyLow (WEB17ebd812): paleoData_summaryStatistic: '' has been replaced by 'min'
accumulation (WEB29098c59): paleoData_units: 'mm/a' has been replaced by 'mm/yr'
age (WEBc000fbdd): paleoData_datum: '' has been replaced by '1950'
age (WEBc000fbdd): paleoData_units: 'BP' has been replaced by 'yr BP'
age (WEBc000fbdd): paleoData_isPrimary: '' has been replaced by 'TRUE'
age (WEBc000fbdd): paleoData_notes: '' has been replaced by 'NA; paleoData_isPrimary has been standardized; paleoData_datum has been standardized'
uncertainty2s (WEBc36b0a99): paleoData_variableName: '2 sigma' has been replaced by 'uncertainty2s'
uncertainty2s (WEBc36b0a99): paleoData_notes: '' has been replaced by 'NA; paleoData_summaryStatistic has been standardized'
uncertainty2s (WEBc36b0a99): paleoData_summaryStatistic: '' has been replaced by '2 sigma'
depthBottom (WEBfae83f38): paleoData_variableName: 'bottomDepth' has been replaced by 'depthBottom'
accumulation (WEB29098c59): interpretation1_seasonality: '1,2,3,4,5,6,7,8,9,10,11,12' has been replaced by 'Annual'
accumulation (WEB29098c59): interpretation1_variable: 'P' has been replaced by 'precipitation'
pub1_volume: '9' has been replaced by ''
accumulation (WEB29098c59): interpretation1_seasonality: 'annual' has been replaced by '1,2,3,4,5,6,7,8,9,10,11,12'
geo_elevation: '2450' has been replaced by ''
accumulation (WEB29098c59): paleoData_proxyGeneral: '((( bio?physical ))) biophysical /// other ice' has been replaced by 'other ice'
accumulation (WEB29098c59): interpretation1_seasonalityGeneral: 'annual' has been replaced by 'Annual'
accumulation (WEB29098c59): interpretation1_variableDetail: 'precip@surface' has been replaced by 'precipitation@surface'
Acc max (WEB11da3cb6): interpretation1_scope: '' has been replaced by 'climate'
Acc min (WEB17ebd812): interpretation1_scope: '' has been replaced by 'climate'
2 sigma (WEBc36b0a99): interpretation1_scope: '' has been replaced by 'climate'
bottomDepth (WEBfae83f38): interpretation1_scope: '' has been replaced by 'climate'
accumulation (WEB29098c59): paleoData_proxyGeneral: 'other ice' has been replaced by '((( bio?physical ))) biophysical /// other ice'
Acc max (WEB11da3cb6): interpretation1_scope: 'climate' has been replaced by ''
Acc min (WEB17ebd812): interpretation1_scope: 'climate' has been replaced by ''
accumulation (WEB29098c59): interpretation1_variableGroup: '' has been replaced by 'P'
2 sigma (WEBc36b0a99): interpretation1_scope: 'climate' has been replaced by ''
bottomDepth (WEBfae83f38): interpretation1_scope: 'climate' has been replaced by ''
accumulation (WEB29098c59): paleoData_proxy: 'Ice Accumulation' has been replaced by 'ice accumulation'
accumulation (WEB29098c59): paleoData_proxyLumps: '' has been replaced by 'ice accumulation'
accumulation (WEB29098c59): paleoData_proxyOriginal: '' has been replaced by 'Ice Accumulation'
age (WEBc000fbdd): paleoData_units: 'yr bp' has been replaced by 'BP'
age (WEBc000fbdd): paleoData_unitsOriginal: '' has been replaced by 'yr bp'
Acc max (WEB11da3cb6): paleoData_QCCertification: '' has been replaced by 'AAC'
Acc min (WEB17ebd812): paleoData_QCCertification: '' has been replaced by 'AAC'
accumulation (WEB29098c59): paleoData_proxyDetail: 'Accumulation' has been replaced by 'GlacierIce'
accumulation (WEB29098c59): paleoData_proxyGeneral: 'biophysical' has been replaced by 'other ice'
accumulation (WEB29098c59): paleoData_variableName: 'Accumulation' has been replaced by 'accumulation'
accumulation (WEB29098c59): interpretation1_variableDetail: 'precipitation@surface' has been replaced by 'precip@surface'
accumulation (WEB29098c59): interpretation1_basis: '' has been replaced by 'interpreted as Aleutian low (winter; negative direction)'
accumulation (WEB29098c59): calibration_method: '' has been replaced by 'uncalibrated'
accumulation (WEB29098c59): calibration_seasonality: '' has been replaced by 'uncalibrated'
Accumulation (WEB29098c59): paleoData_proxyGeneral: 'bio?physical' has been replaced by 'biophysical'
Accumulation (WEB29098c59): paleoData_proxyGeneral: 'Ice Accumulation' has been replaced by 'bio?physical'
geo_gcmdLocation: '' has been replaced by 'North America>Greenland'
Accumulation (WEB29098c59): paleoData_units: 'mm' has been replaced by 'mm/a'
Accumulation (WEB29098c59): paleoData_datum: '' has been replaced by 'abs'
pub1_author: 'list(list(name = "Rasmussen, S. O."), list(name = "Abbott, P. M."), list(name = "Blunier, T."), list(name = "Bourne, A. J."), list(name = "Brook, E."), list(name = "Buchardt, S. L."), list(name = "Buizert, C."), list(name = "Chappellaz, J."), list(name = "Clausen, H. B."), list(name = "Cook, E."), list(name = "Dahl-Jensen, D."), list(name = "Davies, S. M."), list(name = "Guillevic, M."), list(name = "Kipfstuhl, S."), list(name = "Laepple, T."), list(name = "Seierstad, I. K."), list(name = "Severinghaus, J. P."), list(name = "Steffensen, J. P."), list(name = "Stowasser, C."), list(name = "Svensson, A."), list(name = "Vallelonga, P."), list(name = "Vinther, B. M."), list(name = "Wilhelms, F."), list(name = "Winstrup, M."))' has been replaced by 'Rasmussen, S. O.'
Accumulation (WEB29098c59): interpretation1_variableDetail: '@surface' has been replaced by 'precipitation@surface'
Accumulation (WEB29098c59): interpretation1_seasonalityGeneral: '' has been replaced by 'Annual'
Accumulation (WEB29098c59): paleoData_proxy: 'ice' has been replaced by 'Ice Accumulation'
Accumulation (WEB29098c59): paleoData_proxyDetail: '' has been replaced by 'Accumulation'
Accumulation (WEB29098c59): paleoData_proxyGeneral: '' has been replaced by 'Ice Accumulation'
Accumulation (WEB29098c59): paleoData_QCCertification: '' has been replaced by 'CH'
Accumulation reconstruction (mean, minimum and maximum estimates) calculated from the different methods as discussed in section 2.5 of the accompanying paper.
Abstract. A stratigraphy-based chronology for the North Greenland Eemian Ice Drilling (NEEM) ice core has been derived by transferring the annual layer counted Greenland Ice Core Chronology 2005 (GICC05) and its model extension (GICC05modelext) from the NGRIP core to the NEEM core using 787 match points of mainly volcanic origin identified in the electrical conductivity measurement (ECM) and dielectrical profiling (DEP) records. Tephra horizons found in both the NEEM and NGRIP ice cores are used to test the matching based on ECM and DEP and provide five additional horizons used for the timescale transfer. A thinning function reflecting the accumulated strain along the core has been determined using a Dansgaard–Johnsen flow model and an isotope-dependent accumulation rate parameterization. Flow parameters are determined from Monte Carlo analysis constrained by the observed depth-age horizons. In order to construct a chronology for the gas phase, the ice age–gas age difference (Δage) has been reconstructed using a coupled firn densification-heat diffusion model. Temperature and accumulation inputs to the Δage model, initially derived from the water isotope proxies, have been adjusted to optimize the fit to timing constraints from δ15N of nitrogen and high-resolution methane data during the abrupt onset of Greenland interstadials. The ice and gas chronologies and the corresponding thinning function represent the first chronology for the NEEM core, named GICC05modelext-NEEM-1. Based on both the flow and firn modelling results, the accumulation history for the NEEM site has been reconstructed. Together, the timescale and accumulation reconstruction provide the necessary basis for further analysis of the records from NEEM.
A first chronology for the North Greenland Eemian Ice Drilling (NEEM) ice core