Pål Ringkjøb Nielsen

Pål Ringkjøb Nielsen
University of Bergen | UiB · Department of Earth Science

PhD

About

20
Publications
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207
Citations

Publications

Publications (20)
Article
Full-text available
In an effort to reconstruct past aeolian activity, a foredune stratigraphy and a continuous lake sediment record from the largest dunefield on Andøya, northern Norway, have been investigated. The dunefield extends landwards in a north-eastward direction and consists of several parabolic dunes, foredunes and blowouts. The sediment record (169 cm) fr...
Article
Full-text available
Here we present the first high-resolution late-Holocene glacier record from the Lofoten archipelago in northern Norway. The study is based on analyses of lacustrine sediments from the distal glacier-fed lake Kveitvikvatnet (30.1 m a.s.l.), as well as glacial-geomorphological mapping of the ~4.2-km2 surrounding catchment. The lake sediment cores hav...
Article
Full-text available
Holocene fluctuations of a small outlet glacier from the ice cap Høgtuvbreen at 65° N in coastal northern Norway are reconstructed based on distal glacier-fed lake sediments, complemented by a moraine sequence dated by lichenometry. Glaciers respond to changes in accumulation-season precipitation, ablation-season temperature and redistribution of s...
Article
Satellite imagery is increasingly used to monitor glacier area changes and create glacier inventories. Robust and efficient pixel-based band ratios have proven to be accurate for automatically delineating clean glacier ice, however such classifications are restricted on debris-covered ice due to its spectral similarity with surrounding terrain. Obj...
Article
Full-text available
Quick clay is found across Scandinavia and is especially prominent in south-eastern and central Norway. Quick clay is prone to failure and can cause landslides with high velocities and large run-outs. The 1978 Rissa landslide is one of the best-known quick clay landslides to have occurred in the last century, both due to its size and the fact that...
Article
Full-text available
Glaciers and rock glaciers play an important role in the hydrology of the semi-arid northern Chile. Several studies show that glaciers have rapidly lost mass in response to climate change during the last decades. The response of rock glaciers to climate change in this region is, however, less known. In this study we use a combination of historical...
Preprint
Full-text available
Glaciers and rock glaciers play an important role in the hydrology of the semi-arid Northern Chile. Several studies show that glaciers have strongly lost mass in response to climate change during the last decades. The response to rock glaciers in this region is, however, much less investigated. In this study we use a combination of historical aeria...
Article
Full-text available
The course of the ‘Little Ice Age’ (LIA) in Scandinavia is characterized by large glacier advances that started at about AD 1300 and culminated at about AD 1750. The end of the LIA is marked as an unprecedented and ongoing glacier retreat that accelerated from the early 20th century. The course of the LIA is here presented based on fluctuations of...
Article
Full-text available
This study assesses changes in glacier area, velocity, and geodetic mass balance for the glaciers in the Manaslu region of Nepal, a previously undocumented region of the Himalayas. We studied changes between 1970 (for select glaciers), 2000, 2005, and 2013 using freely available Landsat satellite imagery, the SRTM Digital Elevation Model (DEM) and...
Conference Paper
Satellite imagery is an established means for mapping the cryopshere over large spatial and temporal scales. Automated techniques exist for the mapping of clean ice (predominantly pixel-based band ratios) but mostly require the subjective selection of thresholds for each data product, prohibiting fully automatic glacier mapping. Here, we use multi-...
Conference Paper
In this study, the frequency of mass-wasting events and past storminess has been reconstructed throughout the Holocene (11500 cal. yr BP to present) from lacustrine sediments in lake Trehynnvatnet (33 m a.s.l.), which is located in a glacially carved valley at Nykvåg on the outmost coast of western Langøya, Vesterålen, northern Norway. Sediment cor...
Conference Paper
Arctic glaciers have globally experienced a negative mass balance because of the changing climate over the past decades. The Lofoten archipelago at 68°N has one of the largest air temperature anomalies in the world relative to latitude; this is because of the warm waters of the Norwegian Atlantic Current (NAC). Hence, the climate in Lofoten is very...
Conference Paper
Full-text available
Arctic mountain glaciers have decreased dramatically in extent over the last decades as a consequence to higher temperature and/or reduced winter precipitation as snow. These glaciers are sensitive to changes in the climate system, and can therefore give valuable information about past climate conditions. Several studies have been conducted on past...
Conference Paper
Glacier Lake Outburst Floods (GLOF), or Jökulhlaup, represent a major geohazard, and especially under presently witnessed, and further predicted warming climatic conditions, the need to improve our understanding of the processes governing the catastrophic drainage of ice-dammed lakes is prominent. Moreover, the timing of discrete GLOF events can pr...
Article
Reflectance spectroscopy in the visible spectrum (VIS-RS) is a method that has been successfully applied for inferring organic content of sediments. In this study, we test the applicability of VIS-RS to lake sediments in Norway. On the one hand we use conventional, established algorithms for inferring organic content of sediments, on the other hand...

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Projects

Project (1)
Project
Objective: To reconstruct the vertical extent and palaeoclimate during glacier fluctuations in central Scandinavia.