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  • Destouni, Georgia  (206)
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  • 1
    Online Resource
    Online Resource
    Twenty-three unsolved problems in hydrology (UPH) – a community perspective
    Informa UK Limited ; 2019
    In:  Hydrological Sciences Journal Vol. 64, No. 10 ( 2019-07-27), p. 1141-1158
    Details
    In: Hydrological Sciences Journal, Informa UK Limited, Vol. 64, No. 10 ( 2019-07-27), p. 1141-1158
    Type of Medium: Online Resource
    ISSN: 0262-6667 , 2150-3435
    URL: Article
    DOI: 10.1080/02626667.2019.1620507
    Language: English
    Publisher: Informa UK Limited
    Publication Date: 2019
    detail.hit.zdb_id: 2180448-5
    SSG: 14
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Developing water change spectra and distinguishing change drivers worldwide
    American Geophysical Union (AGU) ; 2014
    In:  Geophysical Research Letters Vol. 41, No. 23 ( 2014-12-16), p. 8377-8386
    Details
    In: Geophysical Research Letters, American Geophysical Union (AGU), Vol. 41, No. 23 ( 2014-12-16), p. 8377-8386
    Abstract: Global historic changes of water on land are quantified and visualized In 74% of the basins water change explanation requires landscape drivers Landscape‐driven effects are mostly in opposite direction to climate‐driven effects
    Type of Medium: Online Resource
    ISSN: 0094-8276 , 1944-8007
    URL: Issue
    URL: Article
    DOI: 10.1002/grl.v41.23
    DOI: 10.1002/2014GL061848
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2014
    detail.hit.zdb_id: 2021599-X
    detail.hit.zdb_id: 7403-2
    SSG: 16,13
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    Online Resource
  • 3
    Online Resource
    Online Resource
    Influences of shifts in climate, landscape, and permafrost on terrestrial hydrology : HYDROLOGICAL RESPONSES TO CLIMATE CHANGE
    American Geophysical Union (AGU) ; 2012
    In:  Journal of Geophysical Research: Atmospheres Vol. 117, No. D5 ( 2012-03-16), p. n/a-n/a
    Details
    In: Journal of Geophysical Research: Atmospheres, American Geophysical Union (AGU), Vol. 117, No. D5 ( 2012-03-16), p. n/a-n/a
    Type of Medium: Online Resource
    ISSN: 0148-0227
    URL: Article
    DOI: 10.1029/2011JD016429
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2012
    detail.hit.zdb_id: 2033040-6
    detail.hit.zdb_id: 3094104-0
    detail.hit.zdb_id: 2130824-X
    detail.hit.zdb_id: 2016813-5
    detail.hit.zdb_id: 2016810-X
    detail.hit.zdb_id: 2403298-0
    detail.hit.zdb_id: 2016800-7
    detail.hit.zdb_id: 161666-3
    detail.hit.zdb_id: 161667-5
    detail.hit.zdb_id: 2969341-X
    detail.hit.zdb_id: 161665-1
    detail.hit.zdb_id: 3094268-8
    detail.hit.zdb_id: 710256-2
    detail.hit.zdb_id: 2016804-4
    detail.hit.zdb_id: 3094181-7
    detail.hit.zdb_id: 3094219-6
    detail.hit.zdb_id: 3094167-2
    detail.hit.zdb_id: 2220777-6
    detail.hit.zdb_id: 3094197-0
    SSG: 16,13
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    Online Resource
  • 4
    Online Resource
    Online Resource
    Combined effects of dissolution kinetics, secondary mineral precipitation, and preferential flow on copper leaching from mining waste rock
    American Geophysical Union (AGU) ; 1997
    In:  Water Resources Research Vol. 33, No. 3 ( 1997-03), p. 471-483
    Details
    In: Water Resources Research, American Geophysical Union (AGU), Vol. 33, No. 3 ( 1997-03), p. 471-483
    Abstract: A probabilistic Lagrangian approach to reactive subsurface transport is used to investigate possible processes that may explain reported discrepancies between modelled and observed copper concentrations at the Aitik waste rock heaps in northern Sweden and to quantify the implications of these processes for the long‐term dynamics of copper leaching. The presented Lagrangian transport system couples two different types of primary dissolution kinetics with flow heterogeneity and p H‐dependent equilibrium precipitation/dissolution of secondary copper‐bearing minerals. Of the investigated processes, which we chose to study based on previous geochemical studies of the site, only flow heterogeneity in the form of preferential flow paths can provide a possible explanation for the low drainage water concentrations of copper currently measured in the field. The investigated p H‐dependent precipitation‐dissolution of secondary copper bearing minerals provides an explanation for even lower copper concentrations observed in laboratory column experiments in fresh waste rock; these experiments correspond to the initial part of the weathering phase in the field. If both preferential flow and secondary copper precipitation/dissolution occur at the Aitik site, the assumed prevailing type of primary dissolution kinetics does not influence the modelled expected long‐term copper leaching nearly as much as it does under homogeneous flow conditions without formation of secondary minerals. The present sensitivity analysis does not provide a comprehensive prediction model for the Aitik site, since not all possible hydrological and chemical processes have been included in the investigation. This study rather exemplifies the application of the probabilistic Lagrangian approach as an investigation methodology for field‐scale geochemical problems by using and extending results of detailed geochemical modelling.
    Type of Medium: Online Resource
    ISSN: 0043-1397 , 1944-7973
    URL: Article
    DOI: 10.1029/96WR03466
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 1997
    detail.hit.zdb_id: 2029553-4
    detail.hit.zdb_id: 5564-5
    SSG: 13
    SSG: 14
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    Online Resource
  • 5
    Online Resource
    Online Resource
    The influence of observation method on local concentration statistics in the subsurface
    American Geophysical Union (AGU) ; 1997
    In:  Water Resources Research Vol. 33, No. 4 ( 1997-04), p. 663-676
    Details
    In: Water Resources Research, American Geophysical Union (AGU), Vol. 33, No. 4 ( 1997-04), p. 663-676
    Abstract: By introducing the concept of a finest possible time resolution in concentration observations, we extend the probabilistic Lagrangiari transport formulation to account for the statistics of locally measured concentration values and their dependence on observation method for short pulse solute inputs. The outlined methodology for quantifying the ensemble expected value and variance of locally measured concentration values is relevant for transport under either unsaturated or saturated flow conditions and for different types of observation methods. The methodology is exemplified here for direct pore water sampling in aquifers (perfectly stratified/near‐field transport, or three‐dimensional isotropic and far‐field transport) and for solute that is non‐reactive or undergoes linear (reversible equilibrium or nonequilibrium, and irreversible) sorption. For nonreactive solute and for solute that undergoes irreversible sorption or equilibrium sorption‐desorption, the observation procedure greatly influences the variance of locally measured solute concentrations: both the concentration variance and the coefficient of variation decreases considerably as the sampled water volume/sampling time increases. For solute that undergoes nonequilibrium sorption‐desorption, both the concentration variance and the observation effect on the variance are considerably smaller than for nonreactive solute or solute undergoing equilibrium or irreversible sorption. The reason is that the concentration variance is highly dependent on the sorption kinetics, which implies that simple rules, based on average solute behavior, for when the sorption‐desorption process can be regarded as being in equilibrium may be irrelevant for describing the concentration variance in heterogeneous fields.
    Type of Medium: Online Resource
    ISSN: 0043-1397 , 1944-7973
    URL: Article
    DOI: 10.1029/96WR03955
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 1997
    detail.hit.zdb_id: 2029553-4
    detail.hit.zdb_id: 5564-5
    SSG: 13
    SSG: 14
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    Online Resource
  • 6
    Online Resource
    Online Resource
    The effect of vertical soil heterogeneity on field scale solute flux
    American Geophysical Union (AGU) ; 1992
    In:  Water Resources Research Vol. 28, No. 5 ( 1992-05), p. 1303-1309
    Details
    In: Water Resources Research, American Geophysical Union (AGU), Vol. 28, No. 5 ( 1992-05), p. 1303-1309
    Abstract: Vertical heterogeneity is incorporated in a stochastic transport model, in which the soil is viewed as consisting of an ensemble of essentially vertical, independent stream tubes. The saturated hydraulic conductivity in each stream tube is defined as the vertical average of the corresponding point random process. The statistics of the vertically averaged hydraulic conductivity and the resulting statistics of solute travel time are depth dependent. The evolution of the field scale breakthrough curve with depth is analyzed in terms of the first two moments of solute travel time to an arbitrary depth below the soil surface. The arrival time of the solute center of mass, quantified by the expected travel time, grows linearly with depth also for vertically heterogeneous soil. The temporal solute spreading around its center, quantified by the travel time variance, may exhibit a compression‐expansion that is qualitatively analogous to the solute plume behavior in the studies of Butters and Jury (1989), Russo (1991), and Ellsworth and Jury (1991). The relative solute spreading, quantified by the travel time coefficient of variation, decreases with increasing depth.
    Type of Medium: Online Resource
    ISSN: 0043-1397 , 1944-7973
    URL: Article
    DOI: 10.1029/92WR00166
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 1992
    detail.hit.zdb_id: 2029553-4
    detail.hit.zdb_id: 5564-5
    SSG: 13
    SSG: 14
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    Online Resource
  • 7
    Online Resource
    Online Resource
    Impact of degrading permafrost on subsurface solute transport pathways and travel times
    American Geophysical Union (AGU) ; 2015
    In:  Water Resources Research Vol. 51, No. 9 ( 2015-09), p. 7680-7701
    Details
    In: Water Resources Research, American Geophysical Union (AGU), Vol. 51, No. 9 ( 2015-09), p. 7680-7701
    Type of Medium: Online Resource
    ISSN: 0043-1397 , 1944-7973
    URL: Issue
    URL: Article
    DOI: 10.1002/wrcr.v51.9
    DOI: 10.1002/2014WR016689
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2015
    detail.hit.zdb_id: 2029553-4
    detail.hit.zdb_id: 5564-5
    SSG: 13
    SSG: 14
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    Online Resource
  • 8
    Online Resource
    Online Resource
    Integrated assessment of changes in freshwater inflow to the Arctic Ocean
    American Geophysical Union (AGU) ; 2010
    In:  Journal of Geophysical Research: Atmospheres Vol. 115, No. D12 ( 2010-06-27)
    Details
    In: Journal of Geophysical Research: Atmospheres, American Geophysical Union (AGU), Vol. 115, No. D12 ( 2010-06-27)
    Abstract: We present an integrated and updated quantitative estimation of the river discharge and the meltwater flux and mass contributions from glaciers to the Arctic Ocean and to sea level rise. The average meltwater fluxes from mountain glaciers and ice caps and the Greenland ice sheet have increased markedly, by 56 km 3 /yr water equivalent (w.e.) and 160 km 3 /yr w.e., respectively, from the period 1961–1992 to the period 1993–2006, reaching in total 700–800 km 3 /yr w.e. in 2000–2006. Terrestrial runoff is on the order of 2.4 × 10 3 km 3 /yr and remains significantly larger than the glacier meltwater flux. The terrestrial runoff increase from 1961–1992 to 1993–2006 is 87 km 3 /yr, which is small in relative terms, but in absolute terms it is of the same order of magnitude as the meltwater increase from glaciers. The total contribution to sea level rise from glaciers draining to the Arctic Ocean has increased from 0.27 mm/yr (1961–1992) to about 0.64 mm/yr (1993–2006). In some years of the 1993–2006 period, the glacier contribution to sea level rise reached almost 1 mm/yr.
    Type of Medium: Online Resource
    ISSN: 0148-0227
    URL: Article
    DOI: 10.1029/2009JD013060
    Language: English
    Publisher: American Geophysical Union (AGU)
    Publication Date: 2010
    detail.hit.zdb_id: 2033040-6
    detail.hit.zdb_id: 3094104-0
    detail.hit.zdb_id: 2130824-X
    detail.hit.zdb_id: 2016813-5
    detail.hit.zdb_id: 2016810-X
    detail.hit.zdb_id: 2403298-0
    detail.hit.zdb_id: 2016800-7
    detail.hit.zdb_id: 161666-3
    detail.hit.zdb_id: 161667-5
    detail.hit.zdb_id: 2969341-X
    detail.hit.zdb_id: 161665-1
    detail.hit.zdb_id: 3094268-8
    detail.hit.zdb_id: 710256-2
    detail.hit.zdb_id: 2016804-4
    detail.hit.zdb_id: 3094181-7
    detail.hit.zdb_id: 3094219-6
    detail.hit.zdb_id: 3094167-2
    detail.hit.zdb_id: 2220777-6
    detail.hit.zdb_id: 3094197-0
    SSG: 16,13
    Location Call Number Limitation Availability
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    Online Resource
  • 9
    Online Resource
    Online Resource
    European warm-season temperature and hydroclimate since 850 CE
    IOP Publishing ; 2019
    In:  Environmental Research Letters Vol. 14, No. 8 ( 2019-08-01), p. 084015-
    Details
    In: Environmental Research Letters, IOP Publishing, Vol. 14, No. 8 ( 2019-08-01), p. 084015-
    Abstract: The long-term relationship between temperature and hydroclimate has remained uncertain due to the short length of instrumental measurements and inconsistent results from climate model simulations. This lack of understanding is particularly critical with regard to projected drought and flood risks. Here we assess warm-season co-variability patterns between temperature and hydroclimate over Europe back to 850 CE using instrumental measurements, tree-ring based reconstructions, and climate model simulations. We find that the temperature–hydroclimate relationship in both the instrumental and reconstructed data turns more positive at lower frequencies, but less so in model simulations, with a dipole emerging between positive (warm and wet) and negative (warm and dry) associations in northern and southern Europe, respectively. Compared to instrumental data, models reveal a more negative co-variability across all timescales, while reconstructions exhibit a more positive co-variability. Despite the observed differences in the temperature–hydroclimate co-variability patterns in instrumental, reconstructed and model simulated data, we find that all data types share relatively similar phase-relationships between temperature and hydroclimate, indicating the common influence of external forcing. The co-variability between temperature and soil moisture in the model simulations is overestimated, implying a possible overestimation of temperature-driven future drought risks.
    Type of Medium: Online Resource
    ISSN: 1748-9326
    URL: Article
    DOI: 10.1088/1748-9326/ab2c7e
    Language: Unknown
    Publisher: IOP Publishing
    Publication Date: 2019
    detail.hit.zdb_id: 2255379-4
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  • 10
    Online Resource
    Online Resource
    A Call for Urgent Monitoring of Food and Water Security Based on Relevant Indicators for the Arctic
    Springer Science and Business Media LLC ; 2013
    In:  AMBIO Vol. 42, No. 7 ( 2013-11), p. 816-822
    Details
    In: AMBIO, Springer Science and Business Media LLC, Vol. 42, No. 7 ( 2013-11), p. 816-822
    Type of Medium: Online Resource
    ISSN: 0044-7447 , 1654-7209
    URL: Article
    DOI: 10.1007/s13280-013-0427-1
    RVK:
    AR 10100
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2013
    detail.hit.zdb_id: 120759-3
    detail.hit.zdb_id: 2040524-8
    SSG: 23
    SSG: 12
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