paleo data:
  measurement table:
    google work sheet key: oxp7vdv
    table name: Larsen
    missing value: NaN
    thickness:
      archive type: lake sediment
      has max value: 1.914
      has mean value: 0.3545
      has median value: 0.273
      has min value: 0
      measurement table name: measurementTable1
      pages2k ID: Arc_022
      paleo data table name: measTable
      proxy: varve thickness
      proxy observation type: thickness
      QC certification: JPW, PF
      q cnotes: this lake-sediment-accumulation record likely reflects summer temperature changes on multi-decadal and longer timescales. It should not be used to infer inter-annual variability, which is controlled by subglacial fluvial processes.
      t sid: Arc_021
      units: cm
      use in global temperature analysis: TRUE
      variable name: thickness
      variable type: measured
      WDS paleo url: https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/pages2k-temperature-v2-2017/data-version-2.0.0/Arc-Hvtrvatn.Larsen.2011.txt
      is primary: false
      primary age column: false
      has time tsid: PYTU43KVL36
      values: 0.203
      values: 0.256
      values: 0.253
      values: 0.226
      values: 0.32
      values: 0.353
      values: 0.238
      values: 0.244
      values: 0.206
      values: 0.218
      values: 0.235
      values: 0.412
      values: 0.303
      values: 0.388
      values: 0.212
      values: 0.173
      values: 0.247
      values: 0.265
      values: 0.259
      values: 0.194
      values: 0.268
      values: 0.209
      values: 0.276
      values: 0.156
      values: 0.147
      values: 0.2
      values: 0.174
      values: 0.251
      values: 0.154
      values: 0.112
      values: 0.179
      values: 0.185
      values: 0.296
      values: 0.19
      values: 0.152
      values: 0.119
      values: 0.176
      values: 0.309
      values: 0.304
      values: 0.273
      values: 0.17
      values: 0.315
      values: 0.221
      values: 0.312
      values: 0.271
      values: 0.297
      values: 0.161
      values: 0.232
      values: 0.129
      values: 0.223
      values: 0.229
      values: 0.332
      values: 0.291
      values: 0.359
      values: 0.183
      values: 0.157
      values: 0.438
      values: 0.188
      values: 0.163
    year:
      archive type: lake sediment
      data type: float
      description: Year AD
      has max value: 2000
      has mean value: 1000
      has median value: 1000
      has min value: 0
      inferred variable type: Year
      measurement table name: measurementTable1
      paleo data table name: measTable
      t sid: PYTU43KVL36
      units: yr AD
      variable name: year
      variable type: inferred
      WDS paleo url: https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/pages2k-temperature-v2-2017/data-version-2.0.0/Arc-Hvtrvatn.Larsen.2011.txt
      is primary: true
      primary age column: true
      has time tsid: PYTU43KVL36
      values: 0
      values: 1
      values: 2
      values: 3
      values: 4
      values: 5
      values: 6
      values: 7
      values: 8
      values: 9
      values: 10
      values: 11
      values: 12
      values: 13
      values: 14
      values: 15
      values: 16
      values: 17
      values: 18
      values: 19
      values: 20
      values: 21
      values: 22
      values: 23
      values: 24
      values: 25
      values: 26
      values: 27
      values: 28
      values: 29
      values: 30
      values: 31
      values: 32
      values: 33
      values: 34
      values: 35
      values: 36
      values: 37
      values: 38
      values: 39
      values: 40
      values: 41
      values: 42
      values: 43
      values: 44
      values: 45
      values: 46
      values: 47
      values: 48
      values: 49
      values: 50
      values: 51
      values: 52
      values: 53
      values: 54
      values: 55
      values: 56
      values: 57
      values: 58
      values: 59
      values: 60
      values: 61
chron data:
  model:
    method:
      algorithm: BAM
      over counting: 1
      under counting: 2
archive type: LakeSediment
created by: matlab
dataset id: Pl60rKMf9B3sIIOTalyE
data set name: Arc-Hvitarvatn.Larsen.2011
dataset version: 1.0.5
google data URL: https://docs.google.com/spreadsheets/d/1aFGRO2orq753d7P2WwDSGe8rYKuWEp8zkBHXPI3inEo
google metadata worksheet: ogql495
in compilation1: Arc2k_v1.1.1
in compilation2: PAGES2k_v2.0.0
in compilation3: PAGES2k_v2.1.0
lipdverse link: https://lipdverse.org/data/Pl60rKMf9B3sIIOTalyE/1_0_6
max year: 2000
min year: 0
original data URL: https://www.ncdc.noaa.gov/paleo/study/14730
lipd version: 1.3
changelog:
  version: 1.0.6
  last version: 1.0.5
  curator: nicholas
  timestamp: 2025-11-26 21:10:14.251926 UTC
  changes:
    paleo interpretation metadata: thickness (Arc_021): interpretation2_scope: '' has been replaced by 'climate'
    paleo interpretation metadata: thickness (Arc_021): interpretation3_scope: '' has been replaced by 'isotope'
    paleo interpretation metadata: thickness (Arc_021): interpretation4_scope: '' has been replaced by 'isotope'
    paleo interpretation metadata: thickness (Arc_021): interpretation5_scope: '' has been replaced by 'isotope'
changelog:
  version: 1.0.5
  last version: 1.0.4
  curator: nicholas
  timestamp: 2025-06-07 00:01:24.752353 UTC
pub: A 3000-year varved record of glacier activity and climate change from the proglacial lake Hvítárvatn, Iceland
pub: World Data Center for Paleoclimatology

basis: based on studies of glacier mass balance and glaciology in Iceland (e.g. Bjornsson; Flowers), I would agree that Icelandic glacier fluctuations are dominantly controlled by changes in melt season temperature. Glacier fluctuations influence the production and transport of eroded material and the eventual deposition of this sediment in a downstream basin (i.e. a proglacial lake). ... On short timescales (seasonal, annual, inter-annual), changes in sediment accumulation can be driven by many factors and we can all agree that identifying individual controls is messy. But on longer timescales (for example, centennial timescales, ... I would argue strongly that changes in sediment accumulation are driven by changes in glacier size. This is laid out in Larsen et al., 2011 QSR. We subsequently expanded on this initial study to: 1) include the whole Holocene (Larsen et al., 2012 QSR attached, which demonstrates a clear "8.2ka-event" signal and subsequent Neoglacial onset), and 2) by measuring varve thickness in multiple cores along a lake transect and tying the core data to seismic stratigraphy (Larsen et al. 2013 EPSL attached). This latter work demonstrates that the trends in sediment accumulation are consistent and observed throughout the lake basin. Given the available data, I feel comfortable summarizing as follows: Icelandic glacier fluctuations are dominantly controlled by summer temperature. On longer timescales, fluctuations of the Langjokull ice cap can be reconstructed from changes in mean varve thickness at glacial lake 'Hvitarvatn. with instrumental record'
interp direction: negative
scope: climate
seasonality: Jun-Aug
timescale: multidecadal to millennial
variable: temperature
variable detail: air@surface
direction: negative

scope: climate

scope: isotope

scope: isotope

scope: isotope

has max value: 1
has mean value: 1
has median value: 1
has min value: 1
units: AD

compilation name: Pages2kTemperature
compilation version: 2_1_1
compilation version: 2_1_2
compilation version: 2_2_0

has max value: 1
has mean value: 1
has median value: 1
has min value: 1
units: AD

paleo interpretation metadata: thickness (Arc_021): interpretation1_direction: '' has been replaced by 'negative'

version: 1.0.4
last version: 1.0.3
curator: nicholas
timestamp: 2025-06-06 23:06:02.189861 UTC
changes:
  paleo column metadata: thickness (Arc_021): paleoData_isPrimary: '' has been replaced by 'FALSE'
  paleo column metadata: thickness (Arc_021): paleoData_primaryAgeColumn: '' has been replaced by 'FALSE'
  paleo column metadata: year (PYTU43KVL36): paleoData_isPrimary: '' has been replaced by 'TRUE'
  paleo column metadata: year (PYTU43KVL36): paleoData_primaryAgeColumn: '' has been replaced by 'TRUE'

version: 1.0.3
last version: 1.0.2
curator: nicholas
timestamp: 2025-06-06 21:17:26.252579 UTC
notes: Updated lipdverse database entry with a changed file.
changes:
  base metadata: archiveType: 'lake sediment' has been replaced by 'LakeSediment'
  paleo interpretation metadata: thickness (Arc_021): interpretation1_seasonality: '6 7 8' has been replaced by 'Jun-Aug'
  paleo interpretation metadata: thickness (Arc_021): interpretation1_variable: 'T' has been replaced by 'temperature'
  paleo column metadata: year (PYTU43KVL36): paleoData_units: 'AD' has been replaced by 'yr AD'

version: 1.0.2
last version: 1.0.1
curator: nicholas
timestamp: 2025-06-06 21:03:34.323106 UTC
notes: Changes made as part of LiPDverse vocabulary standardization process
changes:
  base metadata: archiveType: 'lake sediment' has been replaced by 'LakeSediment'
  paleo interpretation metadata: thickness (Arc_021): interpretation1_seasonality: '6 7 8' has been replaced by 'Jun-Aug'
  paleo interpretation metadata: thickness (Arc_021): interpretation1_variable: 'T' has been replaced by 'temperature'
  paleo column metadata: year (PYTU43KVL36): paleoData_units: 'AD' has been replaced by 'yr AD'

version: 1.0.1
last version: 1.0.0
curator: nicholas
timestamp: 2022-08-23 23:46:16 UTC
changes:
  base metadata: dataSetName: 'Arc-Hvítárvatn.Larsen.2011' has been replaced by 'Arc-Hvitarvatn.Larsen.2011'
  geographic metadata: geo_siteName: 'Hvítárvatn' has been replaced by 'Hvitarvatn'

version: 1.0.0
curator: nicholas
timestamp: 2022-08-23 23:41:56 UTC
notes: Starting the changelog

A 3000-year varved record of glacier activity and climate change from the proglacial lake Hvítárvatn, Iceland
author:
  name: Larsen, Darren J.;Miller, Gifford H.;Geirsdóttir, Áslaug;Thordarson, Thorvaldur
cite key: larsen2011a3000yearvarvedrecordofgl
data url: doi.org
doi: 10.1016/j.quascirev.2011.05.026
issue: 19-20
journal: Quaternary Science Reviews
pages: 2715-2731
publisher: Elsevier BV
pub year: 2011
type: article
volume: 30
year: 2011

World Data Center for Paleoclimatology
author:
  name: Larsen, D.J.
institution: World Data Center for Paleoclimatology
type: dataCitation
url: https://www.ncdc.noaa.gov/paleo/study/14730
urldate: 2013

longitude: -19.8
latitude: 64.6
elevation: 422
geometry type: Point
pages2k region: Arc
site name: Hvitarvatn