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  • PANGAEA  (43)
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  • 1
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    Clay mineralogy of the Cenozoic Pagodroma Group, East Antarctica
    PANGAEA
    In:  Supplement to: Ehrmann, Werner; Bloemendal, Jan; Hambrey, Mike J; McKelvey, Barrie C; Whitehead, Jason M (2003): Variations in the composition of the clay fraction of the Cenozoic Pagodroma Group, East Antarctica: implications for determining provenance. Sedimentary Geology, 161(1-2), 131-152, https://doi.org/10.1016/S0037-0738(03)00069-1
    Details
    Publication Date: 2023-05-12
    Description: The Cenozoic Pagodroma Group in the northern Prince Charles Mountains, East Antarctica, is a glaciomarine succession of fjordal character, comprising four uplifted formations of different ages. The composition of the 〈2 µm fraction of sediments of the Pagodroma Group was analysed in order to help identify source areas, past weathering conditions and glacial regimes. Both clay and non-clay minerals have been quantified. The assemblage of the upper Oligocene to lower Miocene Mount Johnston Formation is characterised by the dominance of illite and intermediate concentrations of chlorite. Similar to that assemblage is the clay mineral suite of the middle Miocene Fisher Bench Formation, where illite and chlorite together account for 95% of the clay minerals. The middle to upper Miocene Battye Glacier Formation is the only formation with significant and persistent smectite concentrations, although illite is still dominant. The kaolinite concentration is also high and is even higher than that of chlorite. The clay fraction of the upper Pliocene to lower Pleistocene Bardin Bluffs Formation is characterised by maximum kaolinite concentrations and relatively low illite and chlorite concentrations. The bulk of the clay fraction in each formation can be explained by the physical weathering and erosion of a nearby source under glacial conditions. In the case of Mount Johnston Formation and Fisher Bench Formation this source may be situated in the metavolcanic and gneissic rocks of Fisher Massif. The sediments of the Bardin Bluffs Formation indicate a local source within the Amery Oasis, where Proterozoic granitoid rocks and gneisses, and Permo-Triassic fluvial rocks of the Amery Group are exposed. These results suggest a strong local imprint on the glacial sediments as northwards flowing ice eroded the bedrock in these areas. The origin of the clay fraction of the Battye Glacier Formation is a matter of debate. The smectite and kaolinite content most easily can be explained by erosion of sources largely hidden beneath the ice upstream. Less likely, these clay minerals reflect climatic conditions that were much warmer and wetter than today, facilitating chemical weathering.
    Keywords: AARE94/95; Bardin_Bluffs; Bardin Bluffs, East Antarctica; Battye_Glacier; Battye Glacier, East Antarctica; Fisher_Bench; Fisher Bench, East Antarctica; Geological sample; GEOS; Mount_Johnson; Mount Johnson, East Antarctica; Sampling on land
    Type: Dataset
    Format: application/zip, 4 datasets
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 2
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    Pan-Arctic hourly mean homogenised (dry diameter range 20 to 500 nm) observations of aerosol number size distributions from five arctic long-term observation sites (2017)
    PANGAEA
    In:  Supplement to: Freud, Eyal; Krejci, Radovan; Tunved, Peter; Leaitch, W Richard; Nguyen, Quynh T; Massling, Andreas; Skov, Henrik; Barrie, Leonard (2017): Pan-Arctic aerosol number size distributions: seasonality and transport patterns. Atmospheric Chemistry and Physics, 17(13), 8101-8128, https://doi.org/10.5194/acp-17-8101-2017
    Details
    Publication Date: 2023-01-13
    Description: The Arctic environment has an amplified response to global climatic change. It is sensitive to human activities that mostly take place elsewhere. For this study, a multi-year set of observed aerosol number size distributions in the diameter range of 10 to 500 nm from five sites around the Arctic Ocean (Alert, Villum Research Station - Station Nord, Zeppelin, Tiksi and Barrow) was assembled and analysed. A cluster analysis of the aerosol number size distributions, revealed four distinct distributions. Together with Lagrangian air parcel back-trajectories, they were used to link the observed aerosol number size distributions with a variety of transport regimes. This analysis yields insight into aerosol dynamics, transport and removal processes, on both an intra- and inter-monthly scales. For instance, the relative occurrence of aerosol number size distributions that indicate new particle formation (NPF) event is near zero during the dark months, and increases gradually to ~ 40 % from spring to summer, and then collapses in autumn. Also, the likelihood of Arctic Haze aerosols is minimal in summer and peaks in April at all sites. The residence time of accumulation-mode particles in the Arctic troposphere is typically long enough to allow tracking them back to their source regions. Air flow that passes at low altitude over central Siberia and Western Russia is associated with relatively high concentrations of accumulation-mode particles (Nacc) at all five sites - often above 150/cm**3. There are also indications of air descending into the Arctic boundary layer after transport from lower latitudes. The analysis of the back-trajectories together with the meteorological fields along them indicates that the main driver of the Arctic annual cycle of Nacc, on the larger scale, is when atmospheric transport covers the source regions for these particles in the 10-day period preceding the observations in the Arctic. The scavenging of these particles by precipitation is shown to be important on a regional scale and it is most active in summer. Cloud processing is an additional factor that enhances the Nacc annual cycle. There are some consistent differences between the sites that are beyond the year-to-year variability. They are the result of differences in the proximity to the aerosol source regions and to the Arctic Ocean sea-ice edge, as well as in the exposure to free tropospheric air and in precipitation patterns - to mention a few. Hence, for most purposes, aerosol observations from a single Arctic site cannot represent the entire Arctic region. Therefore, the results presented here are a powerful observational benchmark for evaluation of detailed climate and air chemistry modelling studies of aerosols throughout the vast Arctic region.
    Type: Dataset
    Format: application/zip, 5 datasets
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  • 3
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    Hourly mean homogenised (dry diameter range 20 to 500 nm) observations of aerosol number size distributions from station Zeppelin, 2010-01-01 to 2015-12-22 (2017)
    PANGAEA
    Details
    Publication Date: 2023-01-13
    Keywords: Aerosol number concentration; Air chemistry observatory; DATE/TIME; Log-normal particle size distribution, normalized concentration at particle diameter 100.24 nm; Log-normal particle size distribution, normalized concentration at particle diameter 112.47 nm; Log-normal particle size distribution, normalized concentration at particle diameter 126.19 nm; Log-normal particle size distribution, normalized concentration at particle diameter 141.59 nm; Log-normal particle size distribution, normalized concentration at particle diameter 158.87 nm; Log-normal particle size distribution, normalized concentration at particle diameter 178.25 nm; Log-normal particle size distribution, normalized concentration at particle diameter 200 nm; Log-normal particle size distribution, normalized concentration at particle diameter 20 nm; Log-normal particle size distribution, normalized concentration at particle diameter 22.44 nm; Log-normal particle size distribution, normalized concentration at particle diameter 224.4 nm; Log-normal particle size distribution, normalized concentration at particle diameter 25.179 nm; Log-normal particle size distribution, normalized concentration at particle diameter 251.79 nm; Log-normal particle size distribution, normalized concentration at particle diameter 28.251 nm; Log-normal particle size distribution, normalized concentration at particle diameter 282.51 nm; Log-normal particle size distribution, normalized concentration at particle diameter 31.698 nm; Log-normal particle size distribution, normalized concentration at particle diameter 316.98 nm; Log-normal particle size distribution, normalized concentration at particle diameter 35.566 nm; Log-normal particle size distribution, normalized concentration at particle diameter 355.66 nm; Log-normal particle size distribution, normalized concentration at particle diameter 39.905 nm; Log-normal particle size distribution, normalized concentration at particle diameter 399.05 nm; Log-normal particle size distribution, normalized concentration at particle diameter 44.774 nm; Log-normal particle size distribution, normalized concentration at particle diameter 447.74 nm; Log-normal particle size distribution, normalized concentration at particle diameter 50.238 nm; Log-normal particle size distribution, normalized concentration at particle diameter 502.38 nm; Log-normal particle size distribution, normalized concentration at particle diameter 56.368 nm; Log-normal particle size distribution, normalized concentration at particle diameter 63.246 nm; Log-normal particle size distribution, normalized concentration at particle diameter 70.963 nm; Log-normal particle size distribution, normalized concentration at particle diameter 79.621 nm; Log-normal particle size distribution, normalized concentration at particle diameter 89.337 nm; Mountain Air Monitoring Station; Ny-Ålesund, Spitsbergen; SPUSO; Zeppelin
    Type: Dataset
    Format: text/tab-separated-values, 841244 data points
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    DATA PANGAEA
  • 4
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    Hourly mean homogenised (dry diameter range 20 to 500 nm) observations of aerosol number size distributions from station Barrow, 2007-09-20 to 2015-07-09 (2017)
    PANGAEA
    Details
    Publication Date: 2023-01-13
    Keywords: Aerosol number concentration; Air chemistry observatory; Barrow; DATE/TIME; Log-normal particle size distribution, normalized concentration at particle diameter 100.24 nm; Log-normal particle size distribution, normalized concentration at particle diameter 112.47 nm; Log-normal particle size distribution, normalized concentration at particle diameter 126.19 nm; Log-normal particle size distribution, normalized concentration at particle diameter 141.59 nm; Log-normal particle size distribution, normalized concentration at particle diameter 158.87 nm; Log-normal particle size distribution, normalized concentration at particle diameter 178.25 nm; Log-normal particle size distribution, normalized concentration at particle diameter 200 nm; Log-normal particle size distribution, normalized concentration at particle diameter 20 nm; Log-normal particle size distribution, normalized concentration at particle diameter 22.44 nm; Log-normal particle size distribution, normalized concentration at particle diameter 224.4 nm; Log-normal particle size distribution, normalized concentration at particle diameter 25.179 nm; Log-normal particle size distribution, normalized concentration at particle diameter 251.79 nm; Log-normal particle size distribution, normalized concentration at particle diameter 28.251 nm; Log-normal particle size distribution, normalized concentration at particle diameter 282.51 nm; Log-normal particle size distribution, normalized concentration at particle diameter 31.698 nm; Log-normal particle size distribution, normalized concentration at particle diameter 316.98 nm; Log-normal particle size distribution, normalized concentration at particle diameter 35.566 nm; Log-normal particle size distribution, normalized concentration at particle diameter 355.66 nm; Log-normal particle size distribution, normalized concentration at particle diameter 39.905 nm; Log-normal particle size distribution, normalized concentration at particle diameter 399.05 nm; Log-normal particle size distribution, normalized concentration at particle diameter 44.774 nm; Log-normal particle size distribution, normalized concentration at particle diameter 447.74 nm; Log-normal particle size distribution, normalized concentration at particle diameter 50.238 nm; Log-normal particle size distribution, normalized concentration at particle diameter 502.38 nm; Log-normal particle size distribution, normalized concentration at particle diameter 56.368 nm; Log-normal particle size distribution, normalized concentration at particle diameter 63.246 nm; Log-normal particle size distribution, normalized concentration at particle diameter 70.963 nm; Log-normal particle size distribution, normalized concentration at particle diameter 79.621 nm; Log-normal particle size distribution, normalized concentration at particle diameter 89.337 nm; SPUSO; United States of America
    Type: Dataset
    Format: text/tab-separated-values, 316920 data points
    Location Call Number Expected Availability
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  • 5
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    Hourly mean homogenised (dry diameter range 20 to 500 nm) observations of aerosol number size distributions from station Tiksi, 2013-01-05 to 2015-12-06 (2017)
    PANGAEA
    Details
    Publication Date: 2023-01-13
    Keywords: Aerosol number concentration; DATE/TIME; Log-normal particle size distribution, normalized concentration at particle diameter 100.24 nm; Log-normal particle size distribution, normalized concentration at particle diameter 112.47 nm; Log-normal particle size distribution, normalized concentration at particle diameter 126.19 nm; Log-normal particle size distribution, normalized concentration at particle diameter 141.59 nm; Log-normal particle size distribution, normalized concentration at particle diameter 158.87 nm; Log-normal particle size distribution, normalized concentration at particle diameter 178.25 nm; Log-normal particle size distribution, normalized concentration at particle diameter 200 nm; Log-normal particle size distribution, normalized concentration at particle diameter 20 nm; Log-normal particle size distribution, normalized concentration at particle diameter 22.44 nm; Log-normal particle size distribution, normalized concentration at particle diameter 224.4 nm; Log-normal particle size distribution, normalized concentration at particle diameter 25.179 nm; Log-normal particle size distribution, normalized concentration at particle diameter 251.79 nm; Log-normal particle size distribution, normalized concentration at particle diameter 28.251 nm; Log-normal particle size distribution, normalized concentration at particle diameter 282.51 nm; Log-normal particle size distribution, normalized concentration at particle diameter 31.698 nm; Log-normal particle size distribution, normalized concentration at particle diameter 316.98 nm; Log-normal particle size distribution, normalized concentration at particle diameter 35.566 nm; Log-normal particle size distribution, normalized concentration at particle diameter 355.66 nm; Log-normal particle size distribution, normalized concentration at particle diameter 39.905 nm; Log-normal particle size distribution, normalized concentration at particle diameter 399.05 nm; Log-normal particle size distribution, normalized concentration at particle diameter 44.774 nm; Log-normal particle size distribution, normalized concentration at particle diameter 447.74 nm; Log-normal particle size distribution, normalized concentration at particle diameter 50.238 nm; Log-normal particle size distribution, normalized concentration at particle diameter 502.38 nm; Log-normal particle size distribution, normalized concentration at particle diameter 56.368 nm; Log-normal particle size distribution, normalized concentration at particle diameter 63.246 nm; Log-normal particle size distribution, normalized concentration at particle diameter 70.963 nm; Log-normal particle size distribution, normalized concentration at particle diameter 79.621 nm; Log-normal particle size distribution, normalized concentration at particle diameter 89.337 nm; OBSE; Observation; Tiksi
    Type: Dataset
    Format: text/tab-separated-values, 318210 data points
    Location Call Number Expected Availability
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  • 6
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    Hourly mean homogenised (dry diameter range 20 to 500 nm) observations of aerosol number size distributions from station Station_Nord, 2010-07-07T to 2013-12-31 (2017)
    PANGAEA
    Details
    Publication Date: 2023-01-13
    Keywords: Aerosol number concentration; Air chemistry observatory; DATE/TIME; Log-normal particle size distribution, normalized concentration at particle diameter 100.24 nm; Log-normal particle size distribution, normalized concentration at particle diameter 112.47 nm; Log-normal particle size distribution, normalized concentration at particle diameter 126.19 nm; Log-normal particle size distribution, normalized concentration at particle diameter 141.59 nm; Log-normal particle size distribution, normalized concentration at particle diameter 158.87 nm; Log-normal particle size distribution, normalized concentration at particle diameter 178.25 nm; Log-normal particle size distribution, normalized concentration at particle diameter 200 nm; Log-normal particle size distribution, normalized concentration at particle diameter 20 nm; Log-normal particle size distribution, normalized concentration at particle diameter 22.44 nm; Log-normal particle size distribution, normalized concentration at particle diameter 224.4 nm; Log-normal particle size distribution, normalized concentration at particle diameter 25.179 nm; Log-normal particle size distribution, normalized concentration at particle diameter 251.79 nm; Log-normal particle size distribution, normalized concentration at particle diameter 28.251 nm; Log-normal particle size distribution, normalized concentration at particle diameter 282.51 nm; Log-normal particle size distribution, normalized concentration at particle diameter 31.698 nm; Log-normal particle size distribution, normalized concentration at particle diameter 316.98 nm; Log-normal particle size distribution, normalized concentration at particle diameter 35.566 nm; Log-normal particle size distribution, normalized concentration at particle diameter 355.66 nm; Log-normal particle size distribution, normalized concentration at particle diameter 39.905 nm; Log-normal particle size distribution, normalized concentration at particle diameter 399.05 nm; Log-normal particle size distribution, normalized concentration at particle diameter 44.774 nm; Log-normal particle size distribution, normalized concentration at particle diameter 447.74 nm; Log-normal particle size distribution, normalized concentration at particle diameter 50.238 nm; Log-normal particle size distribution, normalized concentration at particle diameter 502.38 nm; Log-normal particle size distribution, normalized concentration at particle diameter 56.368 nm; Log-normal particle size distribution, normalized concentration at particle diameter 63.246 nm; Log-normal particle size distribution, normalized concentration at particle diameter 70.963 nm; Log-normal particle size distribution, normalized concentration at particle diameter 79.621 nm; Log-normal particle size distribution, normalized concentration at particle diameter 89.337 nm; North Greenland; SPUSO; Station_Nord; Villum Research Station
    Type: Dataset
    Format: text/tab-separated-values, 588750 data points
    Location Call Number Expected Availability
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    DATA PANGAEA
  • 7
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    Composition of the clay fraction at Fisher Bench (2003)
    PANGAEA
    Details
    Publication Date: 2023-02-12
    Keywords: AARE94/95; Amphibole/standard ratio; Chlorite; ELEVATION; Fisher_Bench; Fisher Bench, East Antarctica; Geological sample; GEOS; Illite; Illite 5Å/10Å Esquevin-index; Illite crystallinity; Illite position 10Å; Kalifeldspar/Plagioclase ratio; Kalifeldspar/standard ratio; Kaolinite; Plagioclase/standard ratio; Pyroxene/standard ratio; Quartz/standard ratio; Sample code/label; Sampling on land; Smectite; X-ray diffraction TEXTUR, clay fraction; Zeolite/standard ratio
    Type: Dataset
    Format: text/tab-separated-values, 285 data points
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    DATA PANGAEA
  • 8
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    Composition of the clay fraction at Mount Johnson (2003)
    PANGAEA
    Details
    Publication Date: 2023-02-12
    Keywords: AARE94/95; Amphibole/standard ratio; Chlorite; ELEVATION; Geological sample; GEOS; Illite; Illite 5Å/10Å Esquevin-index; Illite crystallinity; Illite position 10Å; Kalifeldspar/Plagioclase ratio; Kalifeldspar/standard ratio; Kaolinite; Mount_Johnson; Mount Johnson, East Antarctica; Plagioclase/standard ratio; Pyroxene/standard ratio; Quartz/standard ratio; Sample code/label; Sampling on land; Smectite; X-ray diffraction TEXTUR, clay fraction; Zeolite/standard ratio
    Type: Dataset
    Format: text/tab-separated-values, 195 data points
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  • 9
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    Composition of the clay fraction at Battye Glacier (2003)
    PANGAEA
    Details
    Publication Date: 2023-02-12
    Keywords: AARE94/95; Amphibole/standard ratio; Battye_Glacier; Battye Glacier, East Antarctica; Chlorite; ELEVATION; Geological sample; GEOS; Illite; Illite 5Å/10Å Esquevin-index; Illite crystallinity; Illite position 10Å; Kalifeldspar/Plagioclase ratio; Kalifeldspar/standard ratio; Kaolinite; Plagioclase/standard ratio; Pyroxene/standard ratio; Quartz/standard ratio; Sample code/label; Sampling on land; Smectite; X-ray diffraction TEXTUR, clay fraction; Zeolite/standard ratio
    Type: Dataset
    Format: text/tab-separated-values, 195 data points
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  • 10
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    Composition of the clay fraction at Bardin Bluffs (2003)
    PANGAEA
    Details
    Publication Date: 2023-02-12
    Keywords: AARE94/95; Amphibole/standard ratio; Bardin_Bluffs; Bardin Bluffs, East Antarctica; Chlorite; ELEVATION; Geological sample; GEOS; Illite; Illite 5Å/10Å Esquevin-index; Illite crystallinity; Illite position 10Å; Kalifeldspar/Plagioclase ratio; Kalifeldspar/standard ratio; Kaolinite; Plagioclase/standard ratio; Pyroxene/standard ratio; Quartz/standard ratio; Sample code/label; Sampling on land; Smectite; X-ray diffraction TEXTUR, clay fraction; Zeolite/standard ratio
    Type: Dataset
    Format: text/tab-separated-values, 135 data points
    Location Call Number Expected Availability
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