Aarhus Universitets segl

Long-term continuous monitoring of mineral dust in Kangerlussuaq, West Greenland.

Aktivitet: Tale eller præsentation - typerForedrag og mundtlige bidrag

Se relationer på Aarhus Universitet

Christian Juncher Jørgensen - Foredragsholder

Jens Søndergaard - Foredragsholder

Anders Mosbech - Foredragsholder

Dispersion and deposition of mineral dust from natural or anthropogenic sources can have both positive and negative effects on the environment depending on the geochemical and mineralogical composition of the dust. In Greenland, proglacial river systems draining the Greenland Ice Sheet occupy extensive areas of dust prone deposits, which are commonly mobilized and transported by winds of both katabatic and cyclonic origin and subsequently deposited as high latitude dust. The geochemical fingerprint of natural dust emitted along the latitudinal transect reflects the mineralogical and elemental composition of the bedrock underlying the Ice Sheet in the different geological provinces of Greenland. As dust emissions respond to changes in climate-sensitive drivers such as soil moisture, winds speed and precipitation, marked variations in natural dust emissions are present along the climatic gradient in Greenland, ranging from high latitude arctic deserts in North Greenland to low latitude shrub tundra in the South.
In the following, we present a new high latitude dust sampling location in Kangerlussuaq, West Greenland, where dust is collected using a wide array of passive and active dust samplers, including a continuously operated high volume dust sampler, which will offer filter samples of large air volumes (13.000 m3) at a weekly sampling frequency over multiple years. In addition, we would like to present data from a study (1) in which we developed a fast and cost-effective surface screening methodology that is easily applicable for dust source characterization in remote Arctic areas such as Greenland, where dry conditions and high winds create a high natural dust generation potential.

(1) Søndergaard, J. & Jørgensen, C.J. (2021) Field Portable X-Ray Fluorescence (pXRF) Spectrometry for Chemical Dust Source Characterization: Investigations of Natural and Mining-Related Dust Sources in Greenland (Kangerlussuaq Area). DOI: 10.1007/s11270-021-05095-2

14 feb. 202315 feb. 2023

Ekstern organisation (Akademisk)

NavnAgricultural University of Iceland


  • High Latitude Dust, Arctic environment

ID: 307681662