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  • 1
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    Alkalinity and DIC data in water samples from the Alps and Germany collected in 2020 (2021)
    PANGAEA
    Details
    Publikationsdatum: 2023-03-17
    Beschreibung: During two field sampling campaigns in May and June/July 2020, we collected 111 water samples for total alkalinity and DIC (dissolved inorganic carbon) analysis in Germany (Möhnetal, Black Forest and Oberpfalz) and in the Alps in Switzerland, Italy and Austria, at locations for which 10Be measurements are available. In the field, we also recorded water temperature, electrical conductivity and turbidity.
    Schlagwort(e): Alkalinity, total; Alpen2020; Alpen2020_Stat_101; Alpen2020_Stat_102; Alpen2020_Stat_103; Alpen2020_Stat_104; Alpen2020_Stat_105; Alpen2020_Stat_106; Alpen2020_Stat_107; Alpen2020_Stat_111; Alpen2020_Stat_112; Alpen2020_Stat_113; Alpen2020_Stat_114; Alpen2020_Stat_74; Alpen2020_Stat_75; Alpen2020_Stat_76; Alpen2020_Stat_77; Alpen2020_Stat_78; Alpen2020_Stat_79; Alpen2020_Stat_80; Alpen2020_Stat_81; Alpen2020_Stat_83; Alpen2020_Stat_90; Alpen2020_Stat_aa; Alpen2020_Stat_ab; Alpen2020_Stat_ac; Alpen2020_Stat_ad; Alpen2020_Stat_ae; Alpen2020_Stat_af; Alpen2020_Stat_ag; Alpen2020_Stat_ai; Alpen2020_Stat_aj; Alpen2020_Stat_ak; Alpen2020_Stat_al; Alpen2020_Stat_av; Alpen2020_Stat_aw; Alpen2020_Stat_ay; Alpen2020_Stat_ba; Alpen2020_Stat_bb; Alpen2020_Stat_bc; Alpen2020_Stat_be; Alpen2020_Stat_e; Alpen2020_Stat_u; Alpen2020_Stat_v; Alpen2020_Stat_w; Alpen2020_Stat_y; Alpen2020_Stat_z; BOD; BOD bottle (300 ml); Campaign of event; Carbon, inorganic, dissolved; Conductivity, electrical; Date/Time of event; DEPTH, water; Event label; Helmholtz-Zentrum Hereon; Hereon; HYDCAST; Hydrocast; In-situ measurement; Latitude of event; Longitude of event; Method/Device of event; Potentiometric titration (Metrohm 888 Titrando with an Aquatrode pH probe); Salinity; Schwarzwald2020; Schwarzwald2020_Stat_73; Schwarzwald2020_Stat_am; Schwarzwald2020_Stat_an; Schwarzwald2020_Stat_D1; Schwarzwald2020_Stat_D10; Schwarzwald2020_Stat_D11; Schwarzwald2020_Stat_D12; Schwarzwald2020_Stat_D13; Schwarzwald2020_Stat_D14; Schwarzwald2020_Stat_D16; Schwarzwald2020_Stat_D17; Schwarzwald2020_Stat_D18; Schwarzwald2020_Stat_D19; Schwarzwald2020_Stat_D2; Schwarzwald2020_Stat_D20; Schwarzwald2020_Stat_D21; Schwarzwald2020_Stat_D22; Schwarzwald2020_Stat_D23; Schwarzwald2020_Stat_D24; Schwarzwald2020_Stat_D25; Schwarzwald2020_Stat_D26; Schwarzwald2020_Stat_D27; Schwarzwald2020_Stat_D28; Schwarzwald2020_Stat_D29; Schwarzwald2020_Stat_D3; Schwarzwald2020_Stat_D30; Schwarzwald2020_Stat_D31; Schwarzwald2020_Stat_D32; Schwarzwald2020_Stat_D33; Schwarzwald2020_Stat_D34; Schwarzwald2020_Stat_D35; Schwarzwald2020_Stat_D36; Schwarzwald2020_Stat_D37; Schwarzwald2020_Stat_D38; Schwarzwald2020_Stat_D40; Schwarzwald2020_Stat_D41; Schwarzwald2020_Stat_D44; Schwarzwald2020_Stat_D45; Schwarzwald2020_Stat_D47; Schwarzwald2020_Stat_D49; Schwarzwald2020_Stat_D5; Schwarzwald2020_Stat_D50; Schwarzwald2020_Stat_D51; Schwarzwald2020_Stat_D52; Schwarzwald2020_Stat_D53; Schwarzwald2020_Stat_D54; Schwarzwald2020_Stat_D55; Schwarzwald2020_Stat_D56; Schwarzwald2020_Stat_D57; Schwarzwald2020_Stat_D58; Schwarzwald2020_Stat_D59; Schwarzwald2020_Stat_D6; Schwarzwald2020_Stat_D60; Schwarzwald2020_Stat_D61; Schwarzwald2020_Stat_D63; Schwarzwald2020_Stat_D64; Schwarzwald2020_Stat_D67; Schwarzwald2020_Stat_D68; Schwarzwald2020_Stat_D69; Schwarzwald2020_Stat_D7; Schwarzwald2020_Stat_D70; Schwarzwald2020_Stat_D71; Schwarzwald2020_Stat_D72; Schwarzwald2020_Stat_D73; Schwarzwald2020_Stat_D74; Schwarzwald2020_Stat_D9; Temperature, water; Turbidity (Formazin nephelometric unit); VINDTA 3C for AT and Dissolved Inorganic Carbon measurement
    Materialart: Dataset
    Format: text/tab-separated-values, 666 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 2
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    Unbekannt
    10Be erosion rates and riverine alkalinity concentration globally (2022)
    PANGAEA
    Details
    Publikationsdatum: 2024-01-18
    Beschreibung: The erosional influence on terrestrial alkalinity generation globally has been discussed over the last decades. In regional studies, long-term catchment-average denudation rates, determined from the concentration of the cosmogenic nuclide 10Be, have proven to be a powerful tool to quantify how physical erosion rates impact chemical weathering rates. Despite this, little research has been done relating 10Be-derived physical erosion rates with riverine alkalinity concentrations at a global scale. Our dataset aims to fill this gap by matching 10Be erosion rates with alkalinity measurements from 233 locations on six continents, covering latitudes from 44 °S to 51 °N. The locations of published 10Be erosion rates were extracted from the OCTOPUS database (doi:10.5194/essd-10-2123-2018) and either assigned alkalinity concentrations from published manuscripts, the GLORICH database (doi:10.1594/PANGAEA.902360), governmental agencies, or sampled ourselves. Our dataset comprises erosion rates spanning 4 orders of magnitude (2-9829 mm ka-1) and single and time-series measurements of alkalinity (1-3940 measurements per location) covering a large concentration range (4-4626 μmol L-1). We complemented the point sampling measurements of erosion rate and alkalinity concentration with the spatial description of runoff, lithology, temperature, precipitation, permanent snow and ice cover, forest cover, soil thickness and area affected by dams, of the respective catchment upstream from the erosion rate measurement location.
    Schlagwort(e): Acher; Alaknanda; Alkalinity, normalized; Alkalinity, total; Alkalinity, total, standard deviation; Anton_Riv; Anza; Apennines; Appalachian Mts.; Appalachian Piedmont; Ardeche_Riv; Area/locality; Avisio; Based on Global depth to bedrock (DTB) dataset; Based on Global lithological map database (GLiM); Based on GlobCover; Based on OCTOPUS data base; Based on UNH/GRDC runoff composites; Based on WorldClim 2; Basin; Bernese Oberland; Bhudi_Gandaki; Black Forest; Bonne; Carbon, inorganic, dissolved; Carbonate sedimentary rocks; Carti_Grande_Riv; Catchment, affected by dams; Catchment area; Cenral Andes; Central; Central-East; Central Eastern Alps; Central Idaho Mts.; Central Range; Ceze_Riv; Chagres; Chagres_Riv; Chattahoochee_Riv; Chico_Riv; Chietalbach; Choshui_Riv; Cobre_Riv; Comment; Conductivity, electrical; Country; Cuango; Dan_Riv; Danube; Danube catchment; Diablo_Riv; Dreisam_Riv; Durance_Riv; Eastern; Eastern Alps; Eastern Cape; ELEVATION; Emilia Apennines; Emme; Enza_Riv; Erosion rate; Erosion rate, standard deviation; Evaporite; Event label; Eyrieux_Riv; Feldberg; Felix_Riv; Furkareuss; Ganges; Gard_Riv; GOODD (global dataset of more than 38,000 georeferenced dams); Grande_Riv; Guiers_Riv; Guil; Gulf of Lion; Gutach; Helmholtz-Zentrum Hereon; Herault_Riv; Hereon; Heve; Himalaya; Hokitika_Riv; Hollersbch; Hsinwulu_Riv; Hsueshan Range; Ice and glaciers; Identification; Isere_Riv; Itajai_do_Sul_Riv; Jequitinhonha; Kander_Riv; Karangaru_Riv; Keurbooms_Riv; Khudi; Kleine_Emme; Koralpe_Mts; LATITUDE; LONGITUDE; Lonza; Luyeh_Riv; Marsyandi; Marsyandi Basin; Mengong_Riv; Metamorphite; Meuse; Middle Europe; Milibach; Mohne; Muelbach; Mugua_Riv; MULT; Multiple investigations; Muriae_Riv; Namche Barwa-Gyala Peri Massif; Napo; Napo Riv., Upper Amazon Basin; Nar; Neckar; Nepalese Himalaya; Northwest; Number of measurements; Nyang_Riv; Nyong_Riv; Pacora_Riv; Pequini_Riv; Plutonic rocks, acidic; Plutonic rocks, basic; Plutonic rocks, intermediate; Po_Riv; Po floodplain; Pomba_Riv; Precipitation, annual mean; Pyroclastics; Reference/source; Regen; Reno_Riv; Rhenish Massif; Rhine catchment; Rhone_Riv; Rio_Hercilio; Rio_Itajai-Acu; Rio_Lagorai; Rio de Janeiro; Rohalo_Riv; Romanche; Runoff; Saint_Pierre; Salankhu_Riv; Salmon; Saluda_Riv; Sambro_Riv; Sample ID; San_Miguel_Riv; San_Pablo_Riv; Santa_Maria_Riv; Santa Catarina; Secchia_Riv; Sedimentary rock; Sediments; Sense; Seti_Riv; Setta_Riv; Severaisse; Siliciclastic sedimentary rocks; Simme_Riv; Slope gradient, mean; Snow and ice, permanent; So_o_Riv; Soil thickness; South Cameroon; Southern Espinhaco Range; Styrian_Basin; Sum; Susquehanna; Swiss Alps; Tabasar_Riv; Taro_Riv; Tauernbach; Tech_Riv; Temperature, annual mean; Temperature, water; Toce; Toce_Riv; Trebbia_Riv; Trishuli_Riv; Turbidity (Formazin nephelometric unit); Upper_Rhone; Upper Ganges; Veneon; Vigui_Riv; Vispa_Riv; Volcanic rocks, acidic; Volcanic rocks, basic; Volcanic rocks, intermediate; Water bodies; Wattenbach; West Coast, Soutern Island; Western Alps; Western Central Alps; Western French Alps; Whataroa_Riv; Whole_Reno_basin; Wutach; Yarlung_Tsangpo
    Materialart: Dataset
    Format: text/tab-separated-values, 10929 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 3
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    Alkalinity, DIC, δ13C-DIC, major and trace elements, and stable water isotopes data in water samples from a degrading permafrost landscape at subarctic Iskorasfjellet, northern Norway (2022)
    PANGAEA
    Details
    Publikationsdatum: 2024-05-14
    Beschreibung: From September 22nd to October 6th 2020, we collected water samples daily from the outlet of the Gaskabohki catchment, a small subarctic watershed at the mountainside of Iskorasfjellet in northern Norway, to investigate how DIC (dissolved inorganic carbon) and AT (total alkalinity) may change under different environmental forcing (changing precipitation and temperature). We further sampled weekly (3x) at three stations upstream of the outlet to track the changes of the carbonate system with distance from the spring. Besides this temporal examination, we also expanded the investigation spatially, by collecting water samples from seven further catchments, some of which stretch as far as the Barents Sea with different lithologies and varying extent of permafrost. At all sampling sites, we collected water samples for DIC and AT, δ13C-DIC, major and trace elements, and stable water isotopes (δ18O-H2O and δ2H-H2O). We also recorded water temperature, electrical conductivity and turbidity. Finally, at the outlet of the Gaskabohki catchment, we performed a discharge measurement once a day, at the same time as taking the water samples.
    Schlagwort(e): Alkalinity, total; Aluminium; Barium; Bromine; Calcium; Carbon, inorganic, dissolved; Catchment name; Cavity ring-down spectroscopy; Chloride; Conductivity, specific; Continuous Flow Isotope Ratio Mass Spectrometry (CF/IRMS); CRDS; DATE/TIME; DEPTH, water; Discharge; Event label; Fluoride; Helmholtz-Zentrum Hereon; Hereon; Inductively coupled plasma optical emission spectrometry (ICP-OES), Perkin-Elmer, Optima 8300DV; Ion chromatography; Iron; Iskorasfjellet, Norway; Isk-R-Ga1; Isk-R-Ga10; Isk-R-Ga11; Isk-R-Ga3; Isk-R-Ga5; Isk-R-Ga9; Isk-R-Ka1; Isk-R-Ka2; Isk-R-Ka3; Isk-R-Ka4; Isk-R-Ka5; LATITUDE; LONGITUDE; Magnesium; Manganese; Marsh-McBirney Model 2000 Flo-Mate portable flow meter; Multi-parameter meter, 3430 WTW; Nitrate; NO_Land_2020_Isokas; NO_Land_2020_Isokas_Stat_Isk-R-Ga1; NO_Land_2020_Isokas_Stat_Isk-R-Ga10; NO_Land_2020_Isokas_Stat_Isk-R-Ga11; NO_Land_2020_Isokas_Stat_Isk-R-Ga3; NO_Land_2020_Isokas_Stat_Isk-R-Ga5; NO_Land_2020_Isokas_Stat_Isk-R-Ga9; NO_Land_2020_Isokas_Stat_Isk-R-Ka1; NO_Land_2020_Isokas_Stat_Isk-R-Ka2; NO_Land_2020_Isokas_Stat_Isk-R-Ka3; NO_Land_2020_Isokas_Stat_Isk-R-Ka4; NO_Land_2020_Isokas_Stat_Isk-R-Ka5; Phosphorus; Potassium; Potentiometric titration (Metrohm 888 Titrando with an Aquatrode pH probe); Sample code/label; Sample method; Silicon; Sodium; Station label; Strontium; Sulfate; Temperature, water; Turbidity (Formazin nephelometric unit); Turbidity meter, 2100Qis, Hach Lange GmbH; VINDTA 3C for AT and Dissolved Inorganic Carbon measurement; Water sample; WS; δ13C, dissolved inorganic carbon; δ18O, water; δ Deuterium, water
    Materialart: Dataset
    Format: text/tab-separated-values, 1347 data points
    Standort Signatur Einschränkungen Verfügbarkeit
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    DATA PANGAEA
  • 4
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    Expeditions to Fennoscandia in 2020 (2021)
    Alfred Wegener Institute for Polar and Marine Research
    In:  EPIC3Berichte zur Polar- und Meeresforschung = Reports on polar and marine research, Bremerhaven, Alfred Wegener Institute for Polar and Marine Research, 752, 40 p., ISSN: 1866-3192
    Details
    Publikationsdatum: 2021-06-12
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: "Berichte zur Polar- und Meeresforschung" , notRev
    Format: application/pdf
    Standort Signatur Einschränkungen Verfügbarkeit
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    ARTIKEL (OA)
  • 5
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    Alkalinity responses to climate warming destabilise the Earth’s thermostat (2023)
    Springer Nature
    In:  EPIC3Nature Communications, Springer Nature, 14(1), pp. 1648-1648, ISSN: 2041-1723
    Details
    Publikationsdatum: 2024-05-07
    Beschreibung: Alkalinity generation from rock weathering modulates Earth’s climate at geological time scales. Although lithology is thought to dominantly control alkalinity generation globally, the role of other first-order controls appears elusive. Particularly challenging remains the discrimination of climatic and erosional influences. Based on global observations, here we uncover the role of erosion rate in governing riverine alkalinity, accompanied by areal proportion of carbonate, mean annual temperature, catchment area, and soil regolith thickness. We show that the weathering flux to the ocean will be significantly altered by climate warming as early as 2100, by up to 68% depending on the environmental conditions, constituting a sudden feedback of ocean CO2 sequestration to climate. Interestingly, warming under a low-emissions scenario will reduce terrestrial alkalinity flux from mid-latitudes (–1.6 t(bicarbonate) a−1 km−2) until the end of the century, resulting in a reduction in CO2 sequestration, but an increase (+0.5 t(bicarbonate) a−1 km−2) from mid-latitudes is likely under a high-emissions scenario, yielding an additional CO2 sink.
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , isiRev
    Format: application/pdf
    Standort Signatur Einschränkungen Verfügbarkeit
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    ARTIKEL (OA)
  • 6
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    Alkalinity generation from carbonate weathering in a silicate-dominated headwater catchment at Iskorasfjellet, northern Norway (2023)
    Copernicus Publications
    In:  EPIC3Biogeosciences, Copernicus Publications, 20(16), pp. 3459-3479, ISSN: 1726-4170
    Details
    Publikationsdatum: 2024-05-07
    Beschreibung: The weathering rate of carbonate minerals is several orders of magnitude higher than for silicate minerals. Therefore, small amounts of carbonate minerals have the potential to control the dissolved weathering loads in silicate-dominated catchments. Both weathering processes produce alkalinity under the consumption of CO2. Given that only alkalinity generation from silicate weathering is thought to be a long-term sink for CO2, a misattributed weathering source could lead to incorrect conclusions about long- and short-term CO2 fixation. In this study, we aimed to identify the weathering sources responsible for alkalinity generation and CO2 fixation across watershed scales in a degrading permafrost landscape in northern Norway, 68.7–70.5∘ N, and on a temporal scale, in a subarctic headwater catchment on the mountainside of Iskorasfjellet, characterized by sporadic permafrost and underlain mainly by silicates as the alkalinity-bearing lithology. By analyzing total alkalinity (AT) and dissolved inorganic carbon (DIC) concentrations, as well as the stable isotope signature of the latter (δ13C-DIC), in conjunction with dissolved cation and anion loads, we found that AT was almost entirely derived from weathering of the sparse carbonate minerals. We propose that in the headwater catchment the riparian zone is a hotspot area of AT generation and release due to its enhanced hydrological connectivity and that the weathering load contribution from the uphill catchment is limited by insufficient contact time of weathering agents and weatherable materials. By using stable water isotopes, it was possible to explain temporal variations in AT concentrations following a precipitation event due to surface runoff. In addition to carbonic acid, sulfuric acid, probably originating from oxidation of pyrite or reduced sulfur in wetlands or from acid deposition, is shown to be a potential corrosive reactant. An increased proportion of sulfuric acid as a potential weathering agent may have resulted in a decrease in AT. Therefore, carbonate weathering in the studied area should be considered not only as a short-term CO2 sink but also as a potential CO2 source. Finally, we found that AT increased with decreasing permafrost probability, and attributed this relation to an increased water storage capacity associated with increasing contact of weathering agent and rock surfaces and enhanced microbial activity. As both soil respiration and permafrost thaw are expected to increase with climate change, increasing the availability of weathering agents in the form of CO2 and water storage capacity, respectively, we suggest that future weathering rates and alkalinity generation will increase concomitantly in the study area.
    Repository-Name: EPIC Alfred Wegener Institut
    Materialart: Article , isiRev
    Format: application/pdf
    Standort Signatur Einschränkungen Verfügbarkeit
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    ARTIKEL (OA)
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