Ulf Erlingsson

Ulf Erlingsson
Lindorm, Inc. · HQ

PhD

About

21
Publications
5,110
Reads
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132
Citations
Introduction
My interest is physical geography, geomorphology, the magnitude versus frequency issue in the shaping of the planet. To get to the larger picture the "Uppsala School of Physical Geography" in which I was trained, adopted the quantitative study of geomorphological processes. In that vein I invented the SediMeter instrument for measuring erosion and sedimentation, but I have also made theoretical studies of ice sheet. As CEO of Lindorm, Inc. I work on making the best possible sediment monitoring instruments and system.
Additional affiliations
January 1985 - June 1990
Uppsala University
Position
  • Principal Research Engineer
Education
August 1984 - May 1990
Uppsala University
Field of study
  • Physical Geography

Publications

Publications (21)
Article
Since the rapid rate of global warming at the onset of the Bølling interstadial became evident, its cause has been under debate. It coincides closely in time with a strong global transgression called meltwater pulse 1a. One attempt at solution says that a meltwater pulse of Antarctic origin could cause an increase in North Atlantic Deep Water forma...
Article
The most well known sub-glacial lake is probably Grímsvötn under Vatnajökul, Iceland, from where jökulhlaups regularly burst forth. It is created by thermal melting under the ice cap. The Antarctic Lake Vostok, on the other hand, is considered to be located over a region with normal geothermal heat transfer, where it can exist because the ice is so...
Article
The early and late stages of the Weichselian glaciation of the Baltic Sea proper and the Baltic countries is tentatively suggested as having been by means of a thin ice with very low basal friction, to a great extent floating on a number of water-filled cavities. The terms 'captured ice shelf' and 'captured lake' are introduced, suggesting that a f...
Article
Full-text available
The present instrument, the "sedimeter' is optical in that it uses light as an information-carrier, but due to its operating principle it is not disturbed by suspended sediment or colored water. The disturbance of the low pattern associated with it is small and rather constant. -from Author
Article
Full-text available
Based on geographic similarities, Erlingsson (2004) presented the scientific hypothesis that the Atlantean Empire was modelled on the megalithic culture of Europe and Northern Africa. It follows from the hypothesis that the island of Atlantis must have been Ireland. This is tested scientifically using two geographical tests, one regarding length an...
Conference Paper
Full-text available
A pilot study involving SediMeter measurements in a tidal channel.
Research
Full-text available
Deployment of a SediMeter in a tidal current channel to identify conditions of sediment transport off Miami, Florida.
Article
Full-text available
While the paper by Alley et al. (Alley, R.B., Dupont, T.K., Parizek, B.R., Anandakrishnan, S., Lawson, D.E., Larson, G.J., Evenson, E.B., 2006. Outburst flooding and the initiation of ice-stream surges in response to climatic cooling: A hypothesis. Geomorphology 75, 76–89) is a welcome contribution as it presents some new arguments and expands the...
Article
Full-text available
This paper provides a case study of successful removal of reservoir sediment by empty flushing. The main aim of this study was to determine: (i) sediment inflow to the Cachí reservoir; (ii) the pattern and rate of deposition in the reservoir; (iii) the erosion within the reservoir during flushing; and (iv) sediment outflow at a downstream hydrologi...
Article
The early and late stages of the Weichselian glaciation of the Baltic Sea proper and the Baltic countries is tentatively suggested as having been by means of a thin ice with very low basal friction, to a great extent floating on a number of water-filled cavities. The terms 'captured ice shelf and ‘captured lake’ are introduced, suggesting that a fl...
Article
The paper examines the ‘captured ice shelf’-hypothesis through the construction of a numerical model. Based on ice surface elevation, ice thickness, and ground topography, the velocity is calculated. The thickness is adjusted, taking into account the effects of mass balance and deformation. By calculating the fluid potential, the location of the wa...
Article
The paper examines the 'captured ice shelf' hypothesis through the construction of a numerical model. Based on ice surface elevation, ice thickness, and ground topography, the velocity is calculated. The thickness is adjusted, taking into account the effects of mass balance and deformation. By calculating the fluid potential, the location of the wa...
Article
Full-text available
Geomorphological mapping was made of the Surtsey volcanic group, the main island and three submerged volcanic cones, using marine geologic mapping equipment: Bathymetry, pinger, and side-scan sonar.
Article
Full-text available
UNGI rapport / Uppsala Universitet. Naturgeografiska institutionen, ISSN 0375-8109 ; 76 Pages: 136 p. : ill., graphs, maps, tables The morphology and sedimentology resulting from the nearshore and shelf processes of sediment transport, sorting and deposition are studied. The subject is approached with the help of a sediment transport model, using f...
Chapter
Nowhere in the landscape of Sweden is the competition between commercial, industrial, and recreational interests and the ancient Swedish principle of man’s right to free access, so strong as it is along the coast. Only by physical planning and by enacting strict building regulations has it been possible to save unspoiled shores for future generatio...

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Projects (2)
Project
The hypothesis states that the Ice Age Periods are created by a certain distribution of continents which gives rise to a certain deep ocean circulation pattern which is unstable, and that the cycles of said deep ocean circulation gives rise to the Ice Ages. The start of the present Ice Age Period would be the closing of Central America, cutting off the Pacific Ocean from the Atlantic ocean in the tropics, which created or enforced the Florida Current and the Gulf Stream which brings high salinity water north of Iceland, where it sinks and forms the densest bottom water. This draws the Gulf Stream north, pulling warm Caribbean water to the west coast of Norway and thus warming Europe. This causes the rapid warnings that characterize the terminations of the Ice Ages. As the bottom water gets denser the potential for more bottom water formation decreases, the sinking rate decreases, the Norwegian current loses intensity, the climate gradually gets colder over tens of thousands of years, which is how Ice Ages start. The deep water has a residence time in the order of 4,000 years, which hypothetically is related to the fact that an interglacial tends to last about 10,000 years, i.e., the same order of magnitude. The point of sinking is moved south of Iceland since there exists an instability, and full Ice Age conditions will have been established. It fluctuates north and south of Iceland during the Ice Ages, reflecting this instability. This lasts for about 100,000 years, an order of magnitude larger than the interglacial. But something causes there to eventually be such a strong and such a saline Florida current that reaches north of Iceland, at a time when the hyper dense bottom water has already been mixed up (less saline) after tens of thousands of years, that another super strong sinking event starts, which establishes a the interglacial circulation pattern in the North Atlantic Ocean, and warms Europe and eventually North America so the ice sheets disintegrate and disappear. The hypothetical method for the mechanism that could trigger the end of the Ice Ages in the present Ice Age Period is jökulhlaups to the Gulf of Mexico which push out so much extra high-salinity surface water that the sinking west of Norway gets a kick start so to speak. That mechanism I have presented in a published paper, but the rest of the connection to the global climatic cycle remains to test.
Project
When dredging or nourishing beaches there is an inevitable percentage of sediment spill; pollution that may cause harmful effects especially on hard bottoms, coral reefs, mussel banks, and the like. However, experience shows that it's often possible to decrease the impact by adjusting work methods. This requires, of course, that the impact can be detected in real time. The method that I have chosen is to use a bottom-mounted instrument that measures both near-bed turbidity, and changes in bottom level, the SediMeter™. Both parameters are important because depending on grain size and turbulence, either elevated suspended sediment concentration or sediment accumulation may be the main effect of the sediment pollution, and unless one measures both, one may miss certain events. The instruments allow for networking by cable and radio modems. A central monitoring station can get data from all units by the minute, and issue alarms if a threshold has been triggered. On the fly maps of the detected plume can also be created using kriging. The technology is ready, what remains to be done is to field test it in a real world scenario. For that I need research partners, and funding.