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  • 1
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    Surface mass balance along the K-transect in West Greenland (2012)
    PANGAEA
    In:  Supplement to: van de Wal, Roderik S W; Boot, Wim; Smeets, Paul C J P; Snellen, Henk; van den Broeke, Michiel R; Oerlemans, Johannes (2012): Twenty-one years of mass balance observations along the K-transect, West-Greenland. Earth System Science Data, 4(1), 31-35, https://doi.org/10.5194/essd-4-31-2012
    Details
    Publication Date: 2023-01-13
    Description: A 21-year record is presented of surface mass balance measurements along the K-transect. The series covers the period 1990-2011. Data are available at 8 sites along a transect over an altitude range of 390 - 1850 m at approximately 67° N in West Greenland. The surface mass balance gradient is on average 3.8 x 10**-3 m w.e./m, and the mean equilibrium line altitude is 1553 m a.s.l. Only the lower 3 sites within 10 km of the margin experience a significant increasing trend in the ablation over the entire period.
    Keywords: Comment of event; DATE/TIME; Date/time end; Event label; K-transect; Mass balance in water equivalent per year; OBSE; Observation; SHR; Site-10; Site-4; Site-5; Site-6; Site-7; Site-8; Site-9; West Greenland Margin
    Type: Dataset
    Format: text/tab-separated-values, 326 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    (Table 2) Volcanic signatures identified in ice cores from the Everest and 3 Svalbard sites (2012)
    PANGAEA
    Details
    Publication Date: 2023-11-22
    Keywords: Abbreviation; Age; Datum level; DEPTH, ice/snow; Difference; Event label; Glacier; Himalaya; Holtedahl_core05; ICEDRILL; Ice drill; Latitude of event; Lomonosov_core97; Longitude of event; MtEverest_core02; Svalbard; Vestfonna_core95; Year of eruption
    Type: Dataset
    Format: text/tab-separated-values, 180 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    (Table S1) Brominated flame retardant concentrations in an ice core from Holtedahlfonna, Svalbard (2010)
    PANGAEA
    In:  Supplement to: Hermanson, Mark H; Isaksson, Elisabeth; Forsström, Sanja; Teixeira, Camilla; Muir, Derek C G; Pohjola, Veijo A; van de Wal, Roderik S W (2010): Deposition History of Brominated Flame Retardant Compounds in an Ice Core from Holtedahlfonna, Svalbard, Norway. Environmental Science & Technology, 44(19), 7405-7410, https://doi.org/10.1021/es1016608
    Details
    Publication Date: 2023-12-13
    Description: Brominated flame retardants (BFRs) have been found in Arctic wildlife, lake sediment, and air. To identify the atmospheric BFR deposition history on Svalbard, Norway, we analyzed 19 BFRs, including hexabromocyclododecane (HBCD), 1,2-bis(2,4,6-tribromophenoxy)ethane (BTBPE), decabromodiphenyl ethane (DBDPE), pentabromoethylbenzene (PBEB),and 15 polybrominated diphenyl ether congeners (PBDE) in the upper 34 m of an ice core (representing 1953-2005) from Holtedahlfonna, the western-most ice sheet on Svalbard. All of the non-PBDE compounds were detected in nearly continuous profiles in the core. Seven PBDEs were not observed above background (28,47,66,100,99,154,153), while 4 were found in 1 or 2 of 6 segments (17,85,138,183). BDEs-49,71,190,209 had nearly continuous profiles but only BDE-209 in large amounts. The greatest inputs were HBCD and BDE-209, 910, and 320 pg/cm**2/yr from 1995-2005. DBDPE, BTBPE, and PBEB show nearly continuous input growth in recent core segments, but all were 〈6 pg/cm**2/yr. Long-range atmospheric processes may have moved these particle-bound BFRs to the site, probably during the Arctic haze season. Average air mass trajectories over 10 years show 〉75% of atmospheric flow to Holtedahlfonna coming from Eurasia during haze periods (March and April).
    Keywords: 1,2-Bis(2,4,6-tribromophenoxy) ethane; Age; Decabromodiphenyl ethane; DEPTH, sediment/rock; Gas chromatography - Mass spectrometry (GC-MS); Hexabromocyclododecane; Holtedahlfonna; ICEDRILL; Ice drill; International Polar Year (2007-2008); IPY; Pentabromoethylbenzene; Polybrominated diphenyl ethers, congener BDE-138; Polybrominated diphenyl ethers, congener BDE-17; Polybrominated diphenyl ethers, congener BDE-183; Polybrominated diphenyl ethers, congener BDE-190; Polybrominated diphenyl ethers, congener BDE-209; Polybrominated diphenyl ethers, congener BDE-49; Polybrominated diphenyl ethers, congener BDE-71; Polybrominated diphenyl ethers, congener BDE-85; Sample ID; W Spitzbergen
    Type: Dataset
    Format: text/tab-separated-values, 59 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Ice velocities of Nordenskiöldbreen glacier, Svalbard (2010)
    PANGAEA
    In:  Supplement to: den Ouden, M A G; Reijmer, Carleen H; Pohjola, Veijo A; van de Wal, Roderik S W; Oerlemans, Johannes; Boot, Wim (2010): Stand-alone single-frequency GPS ice velocity observations on Nordenskiöldbreen, Svalbard. The Cryosphere, 4(4), 593-604, https://doi.org/10.5194/tc-4-593-2010
    Details
    Publication Date: 2023-12-13
    Description: Precise measurements of ice-flow velocities are necessary for a proper understanding of the dynamics of glaciers and their response to climate change. We use stand-alone single-frequency GPS receivers for this purpose. They are designed to operate unattended for 1-3 years, allowing uninterrupted measurements for long periods with hourly temporal resolution. We present the system and illustrate its functioning using data from 9 GPS receivers deployed on Nordenskiöldbreen, Svalbard, for the period 2006-2009. The accuracy of the receivers is 1.62 m based on the standard deviation in the average location of a stationary reference station (NBRef). Both the location of NBRef and the observed flow velocities agree within one standard deviation with DGPS measurements. Periodicity (6, 8, 12, 24 h) in the NBRef data is largely explained by the atmospheric, mainly ionospheric, influence on the GPS signal. A (weighed) running-average on the observed locations significantly reduces the standard deviation and removes high frequency periodicities, but also reduces the temporal resolution. Results show annual average velocities varying between 40 and 55 m/yr at stations on the central flow-line. On weekly to monthly time-scales we observe a peak in the flow velocities (from 60 to 90 m/yr) at the beginning of July related to increased melt-rates. No significant lag is observed between the timing of the maximum speed between different stations. This is likely due to the limited temporal resolution after averaging in combination with the relatively small distance (max. ±13 km) between the stations.
    Keywords: International Polar Year (2007-2008); IPY
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Mean chemical characteristics and volcano signatures of ice cores from Belukha, the Everest and three Svalbard sites (2012)
    PANGAEA
    In:  Supplement to: Moore, John C; Beaudon, Emilie; Kang, Shichang; Divine, Dmitry V; Isaksson, Elisabeth; Pohjola, Veijo A; van de Wal, Roderik S W (2012): Statistical extraction of volcanic sulphate from nonpolar ice cores. Journal of Geophysical Research, 117(D3), D03306, https://doi.org/10.1029/2011JD016592
    Details
    Publication Date: 2023-12-13
    Description: Ice cores from outside the Greenland and Antarctic ice sheets are difficult to date because of seasonal melting and multiple sources (terrestrial, marine, biogenic and anthropogenic) of sulfates deposited onto the ice. Here we present a method of volcanic sulfate extraction that relies on fitting sulfate profiles to other ion species measured along the cores in moving windows in log space. We verify the method with a well dated section of the Belukha ice core from central Eurasia. There are excellent matches to volcanoes in the preindustrial, and clear extraction of volcanic peaks in the post-1940 period when a simple method based on calcium as a proxy for terrestrial sulfate fails due to anthropogenic sulfate deposition. We then attempt to use the same statistical scheme to locate volcanic sulfate horizons within three ice cores from Svalbard and a core from Mount Everest. Volcanic sulfate is 〈5% of the sulfate budget in every core, and differences in eruption signals extracted reflect the large differences in environment between western, northern and central regions of Svalbard. The Lomonosovfonna and Vestfonna cores span about the last 1000 years, with good extraction of volcanic signals, while Holtedahlfonna which extends to about AD1700 appears to lack a clear record. The Mount Everest core allows clean volcanic signal extraction and the core extends back to about AD700, slightly older than a previous flow model has suggested. The method may thus be used to extract historical volcanic records from a more diverse geographical range than hitherto.
    Keywords: International Polar Year (2007-2008); IPY
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
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