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Property:QCnotes

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Pages using the property "QCnotes"

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Africa 001.d18O +Temperature estimates determined using linear regression between speleothem d18O and annual mean temperature. An "anomalous" period, from AD 1956-1976 was removed from this calibration. In the context of the Holocene, the application of this calibration results in temperature trends contrary to other published records for the last 10,000 years.  +
Ant 022.dD +Data for past 1000 years from https://www.ncdc.noaa.gov/paleo/study/14201; data for first millennium CE from https://www.ncdc.noaa.gov/paleo/study/13954 (centennial resolution) plus this study (annual resolution). JRI ice core also has a melt-layer record covering 1000 - 2007 CE http://www.ncdc.noaa.gov/paleo/study/14201  +
Ant 029.temperature +Temp inferred from accumulation rate; defer to isotopes  +
Ant 031.d18O +MicS revised dating, NOAA National Climatic Data Center https://www.ncdc.noaa.gov/paleo/study/20246 (2016)  +
Ant 031dD.dD +MicS revised dating, NOAA National Climatic Data Center https://www.ncdc.noaa.gov/paleo/study/20246 (2016)  +
Arc 008.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Arc 011.d18O +QC wait for VMD  +
Arc 012.temperature +MXD record replaces the TRW; duplicate record omited from EuroMed  +
Arc 012mxd.temperature1 +MXD record replaces the TRW; duplicate record omited from EuroMed  +
Arc 016.trsgi +No low frequency;updated detrending in DArrigo et al. (2006) but data not available. Likely divergence issues but the only existing record from northeastern Siberia so it must be used to increase coverage.(FCL)  +
Arc 021.thickness +Based on studies of glacier mass balance and glaciology in Iceland (e.g. Bjornsson; Flowers), 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. Previous comment: QC failed: article states "sediment flux to Hvítárvatn is dominantly controlled by the integrated rate of sediment production by erosion beneath Langjökull, modulated on annual to decadal timescales by the efficiency of the subglacial fluvial sediment delivery system.", variability function of proximity, absolute values function of sediment availability. This is _not_ temperature!; QQ by PF not passed  +
Arc 023.trsgi +QC under question. Very weak correlation to temperature and not well described in the literature (FCL)  +
Arc 024.thickness +Valid only for > 3yr time scales  +
Arc 025.X radiograph dark layer +Time series truncated at 1800 CE. Actual measurement is not the thickness of the organic-rich layer as stated in orignial data citation. Instead, a measure of organic content within a year is estimated by the cumulative sum of the dark component of pixels of radiographs for each varve\  +
Arc 026.d18O +Low frequency  +
Arc 032.d18O +Low frequency  +
Arc 033.d18O +Low frequency  +
Arc 034.d18O +Low frequency  +
Arc 036.temperature +multi-decadal MAT, 50-year or so averages of exactly dated historical documentary information. A hiatus in the 15th and part of the 16th centuries (FCL)  +
Arc 040.temperature +Mind dating uncertainty  +
Arc 043.d18O +Fisher et al report episodic scouring of winter snow, some random warm bias in the isotopic signal  +
Arc 044.d18O +Fisher et al report episodic scouring of winter snow, some random warm bias in the isotopic signal  +
Arc 045.temperature +A newer, higher-resolution record has been published by Jiang et al. (2015, Geology: doi:10.1130/G36377.1; data at: http://www.ncdc.noaa.gov/paleo/study/17635)  +
Arc 053.temperature +QC under question, negative correlation to local temperature (FCL), should be negative accoriding to NickMcKay, keep it.  +
Arc 057.density +Δdensity = MXD - minimum density, more focused summer temp. signal than MXD (Björklund et al., 2014, CP, doi:10.5194/cp-10-877-2014)  +
Arc 058.density +Δdensity = MXD - minimum density, more focused summer temp. signal than MXD (Björklund et al., 2014, CP, doi:10.5194/cp-10-877-2014)  +
Arc 059.density +Δdensity = MXD - minimum density, more focused summer temp. signal than MXD (Björklund et al., 2014, CP, doi:10.5194/cp-10-877-2014)  +
Arc 060.density +Δdensity = MXD - minimum density, more focused summer temp. signal than MXD (Björklund et al., 2014, CP, doi:10.5194/cp-10-877-2014)  +
Arc 065.d18O +Use Arc_66 (same location, other variable)  +
Arc 073.temperature +Mind dating uncertainty  +
Arc 075.thickness +Use calibrated temperatures instead of varve thickness  +
Arc 078.temperature +strong correlation. However, opposite long-term (orbital) trend to most other Arctic records (FCL)  +
Arc 093.trsgi +Strong sign-to-noise ratio in the mean divergence-free regional chronology (representing a network of 29 sites in the Mackenzie Delta region) with Expressed Population Signal (EPS) > 0.85 since AD 1400, and EPS > 0.7 back to AD 1245. The chronology shares a moderate to strong positive correlation with local summer temperatures (r = 0.6, p < 0.001) over the calibration period, and moderate to strong correlations with several other reconstructions from surrounding regions spanning the last millenium.  +
Arc 096.d18O +Rejected - not 300 years long  +
Arc 100.temperature +replaces Esper 2002 and Briffa2008  +
Arc 150.MXD +This MXD chronology supersedes Arc_019  +
Asia 049.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 050.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 051.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 052.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 053.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 054.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 055.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 056.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 057.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 058.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 059.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 060.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 061.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 067.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 068.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 069.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 070.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 071.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 074.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 075.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 076.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 077.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 078.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 079.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 080.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 081.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 082.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 083.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 084.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 085.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 087.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 089.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 090.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 091.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 093.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 096.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 098.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 099.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 101.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 102.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 125.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 126.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 127.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 129.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 130.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 134.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 135.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 144.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 150.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 151.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 152.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 153.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 154.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 155.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 156.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 157.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 158.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 163.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 164.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 165.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 166.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 167.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
Asia 168.trsgi +Elevation estimated from GoogleEarth; rounded to 100 m  +
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