Seminar by Guy Tallentire, Postgraduate Researcher, Loughborough University, United Kingdom.
Spatio-temporal variability of two contrasting sediment-laden meltwater plume systems, Kongsfjorden, Svalbard
Abstract: Sediment-laden meltwater plumes which are easily observable using satellite remote sensing, are good proxies for glacier runoff, both from subaerial rivers draining land-terminating glaciers, and subglacial discharge at marine-terminating glacier systems; they bridge the gap between infrequent field observations and regular satellite data acquisitions. In-situ surface reflectance and surface water measurements were collected across three field seasons, at the terrestrial glacier-fed Bayelva river plume, and the Blomstrandbreen subglacial discharge plume. These in-situ measurements, combined with Moderate Imaging Spectroadiometer (MODIS) satellite data and other higher resolution optical satellite datasets (e.g. Landsat, Sentinel and Planet) were used to calibrate a relationship between surface reflectance and suspended sediment concentration at the two sediment-laden meltwater plumes. Using these empirical relationships, we determine seasonal sediment flux by establishing the thickness of the plume layer through conductivity, temperature and depth (CTD) profiles. Additionally, we determine plume metrics (area, extent or planform morphology and distribution), by integrating CTD profiles and measurements of meltwater runoff and sediment collected at the Bayelva hydrometric gauge, along with modelled datasets.
It is possible to attend physically or to participate digitally at the seminar
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About the seminar
This seminar is offered by the Section for Geography and Hydrology, Dept. of Geosciences, University of Oslo. The GEOHYD-seminars are announced as lunch seminars so bring your lunch if you want to.
The seminars are open for everyone interested, and especially students are welcome.
The Lunch Seminar Team
– Louise and Sigrid