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Hydrological and meteorological investigations in a periglacial lake catchment near Kangerlussuaq, west Greenland - presentation of a new multi-parameter data set
Stockholm University, Faculty of Science, Department of Physical Geography. Swedish Nuclear Fuel and Waste Management Co, Sweden.
Stockholm University, Faculty of Science, Department of Physical Geography. Swedish University of Agricultural Science, Sweden.
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Number of Authors: 8
2015 (English)In: Earth System Science Data, ISSN 1866-3508, E-ISSN 1866-3516, Vol. 7, no 1, 93-108 p.Article in journal (Refereed) Published
Abstract [en]

Few hydrological studies have been conducted in Greenland, other than on glacial hydrology associated with the ice sheet. Understanding permafrost hydrology and hydroclimatic change and variability, however, provides key information for understanding climate change effects and feedbacks in the Arctic landscape. This paper presents a new, extensive, and detailed hydrological and meteorological open access data set, with high temporal resolution from a 1.56 km(2) permafrost catchment, with a lake underlain by a through-talik close to the ice sheet in the Kangerlussuaq region, western Greenland. The paper describes the hydrological site investigations and utilized equipment, as well as the data collection and processing. The investigations were performed between 2010 and 2013. The high spatial resolution, within the investigated area, of the data set makes it highly suitable for various detailed hydrological and ecological studies on catchment scale. The data set is available for all users via the PANGAEA database,

Place, publisher, year, edition, pages
2015. Vol. 7, no 1, 93-108 p.
National Category
Earth and Related Environmental Sciences
Research subject
Physical Geography
URN: urn:nbn:se:su:diva-119262DOI: 10.5194/essd-7-93-2015ISI: 000356934300007OAI: diva2:845873
Available from: 2015-08-13 Created: 2015-08-03 Last updated: 2016-04-28Bibliographically approved
In thesis
1. The influence of climate and permafrost on catchment hydrology
Open this publication in new window or tab >>The influence of climate and permafrost on catchment hydrology
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The cycling of water in the landscape is influenced by climate change on different time scales and in different directions regarding warming or cooling trends. Along with a changing climate, also the landscape and subsurface conditions, such as permafrost extent, may change in a long-term perspective. Permafrost and hydrology are intimately connected but the interactions between them are poorly understood, and the hydrological response to climate change is complex. The first part of this thesis investigates the effects of different drivers of future changes in hydrological flow and water storage components in the present day temperate Forsmark catchment in Sweden. The role of taliks and their influence on the exchange of deep and shallow groundwater in permafrost environments are also studied. This is done by a simulation sequence where the site is exposed to the landscape, climate and permafrost changes expected from site-specific numerical modeling. In the second part of this thesis, present day periglacial hydrological processes are studied in the Two Boat Lake catchment in western Greenland by field and model investigations of the site. The presence of a through talik below the Two Boat Lake, and data from a deep bedrock borehole into the talik, enable studies of the hydrological interactions between the lake and the talik. The spatial and temporal variability of the different water balance components of the catchment are quantified and the interactions between the surface water and the supra- and sub-permafrost groundwater are analyzed.

The results show that the investigated changes in climate and permafrost influence hydrology more than the investigated landscape changes. Under permafrost conditions, the general direction of the exchange between deep and shallow groundwater may change relative to unfrozen conditions. The simulation studies of Forsmark show that the relative topography between taliks governs the recharging and discharging conditions, which is consistent with results from Two Boat Lake. The lake is located at high altitude relative to other taliks and hydraulic measurements indicate recharging conditions. The talik recharge is small compared to other water balance components and does not influence the lake level, which instead is found to be controlled by evapotranspiration and water inflow from the active layer. This is concluded from numerical simulations that take into account and combine evapotranspiration with other surface and subsurface hydrological processes. This thesis highlights the need to integrate surface and subsurface process modelling in order to quantitatively understand and represent the dynamics and complexity of hydrological interactions in periglacial catchments.

Place, publisher, year, edition, pages
Stockholm: Department of Physical Geography, Stockholm University, 2016. 44 p.
Dissertations from the Department of Physical Geography, ISSN 1653-7211 ; 56
Hydrology, Periglacial, Greenland, Forsmark, Talik, Permafrost Hydrology
National Category
Oceanography, Hydrology, Water Resources
Research subject
urn:nbn:se:su:diva-124058 (URN)978-91-7649-390-8 (ISBN)
Public defence
2016-06-03, De Geersalen, Geovetenskapens hus, Svante Arrhenius väg 14, Stockholm, 13:00 (English)
Available from: 2016-05-11 Created: 2015-12-11 Last updated: 2016-04-28Bibliographically approved

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