Paleogeophysics and Geodynamics

Saltsjöbaden, Sweden

Paleogeophysics and Geodynamics

Saltsjöbaden, Sweden

Time filter

Source Type

Morner N.-A.,Paleogeophysics and Geodynamics
Journal of Coastal Research | Year: 2017

Coastal morphology, stratigraphy, radiocarbon dating, archaeological remains, historical documentation, and tide gauge records allowed us to establish a very firm and detailed record of the changes in sea level in Goa over the last 500 years. It is an oscillation record: a low level in the early 16th century, a +50-cm high level in the 17th century, a level below present sea level in the 18th century, a +20-cm high level in the 19th and early 20th centuries, a ∼20-cm fall in 1955-1962, and a virtually stable level over the last 50 years. This sea level record is almost identical to those obtained in the Maldives and in Bangladesh. The Indian Ocean seems to lack records of any alarming sea-level rise in recent decades; on the contrary, 10 sites analyzed indicate a sea level remaining at about ±0.0, at least over the last 50 years or so. © Coastal Education and Research Foundation, Inc. 2017.


Morner N.-A.,Paleogeophysics and Geodynamics
GFF | Year: 2013

The Swedish Varve Chronology initiated by De Geer, and revised and updated by several successors, offers the possibility to test the synchroneity of deformations and turbidites. There are many examples of synchronous deformations over wide areas. This calls for an explanation in terms of ground shaking by high-magnitude earthquakes. Several well-known varve events previously interpreted as "drainage varves" are shown here to be seismically induced marker-beds. Therefore they should be renamed as seismites. Some are, in fact, formed by tsunami waves, and should be termed tsunamites. By this, the Swedish Time Scale becomes a very useful archive for the identification and dating of palaeoseismic events. © 2013 OPA (Overseas Publishers Association) N.V. Published by license under the Harwood Academic Publishers imprint, 2013.


Morner N.-A.,Paleogeophysics and Geodynamics
Energy and Environment | Year: 2011

At around 2040-2050 we will be in a new major Solar Minimum. It is to be expected that we will then have a new "Little Ice Age" over the Arctic and NW Europe. The past Solar Minima were linked to a general speeding-up of the Earth's rate of rotation. This affected the surface currents and southward penetration of Arctic water in the North Atlantic causing "Little Ice Ages" over northwestern Europe and the Arctic.


Morner N.-A.,Paleogeophysics and Geodynamics
Energy and Environment | Year: 2013

The history and development of our understanding of sea level changes is reviewed. Sea level research is multi-fascetted and calls for integrated studies of a large number of parameters. Well established records indicate a post-LIA (1850-1950) sea level rise of 11 cm. During the same period of time, the Earth's rate of rotation experienced a slowing down (deceleration) equivalent to a sea level rise of about 10 cm. Sea level changes during the last 40-50 years are subjected to major controversies. The methodology applied and the views claimed by the IPCC are challenged. For the last 40-50 years strong observational facts indicate virtually stable sea level conditions. The Earth's rate of rotation records a mean acceleration from 1972 to 2012, contradicting all claims of a rapid global sea level rise, and instead suggests stable, to slightly falling, sea levels. Best estimates for future sea level changes up to the year 2100 are in the range of +5 cm ±15 cm.


Morner N.-A.,Paleogeophysics and Geodynamics
Global and Planetary Change | Year: 2010

The past Solar Minima were linked to a general speeding up of the Earth's rate of rotation. This affected the surface currents and southward penetration of Arctic water in the North Atlantic causing "Little Ice Ages" over northwestern Europe. At around 2040-2050 we will be in a new major Solar Minimum. It is to be expected that we will then have a new "Little Ice Age" over the Arctic and NW Europe. The mechanism proposed for the linkage of Solar activity with Earth's rotation is the interaction of Solar Wind with the Earth's magnetosphere; the decrease in Solar Wind at sunspot minima weakens the interaction with the magnetosphere that allows the Earth to speed up, and the increase in Solar Wind at sunspot maxima strengthens the interaction with the magnetosphere that slows down the spinning of the Earth. © 2010 Elsevier B.V.


Morner N.-A.,Paleogeophysics and Geodynamics
Energy and Environment | Year: 2010

Morphological and stratigraphical observational facts in the Sundarban delta provide data for a novel sea level reconstruction of the area. This sea level documentation lacks traces of a global sea level rise. This implies totally new perspectives for the future of Bangladesh. No longer are there any reasons to fear an extensive sea level inundation in the near future. Sea level estimates based on linear trend analyses of tide gauge data should be avoided and seem often to be directly misleading, as was the case with previous, divergent, claims of a strong global sea level rise component.


Morner N.-A.,Paleogeophysics and Geodynamics
Quaternary International | Year: 2010

The ocean level is constantly changing and there are many different forcing functions. Today, we realize that a rise in one area may, in fact, correspond to a fall in another area. A number of problems or pit-falls in sea level analyses are highlighted; viz. the significance of shore morphology, the multiple possible causes of coastal erosion, the necessity to consider cyclic changes, not least the 18.6 tidal cycle and its relation to our tide-gauge records, the effects of redistribution of ocean water masses, the problems with many sea level curves based solely on isolation levels, and the problems of transferring time/depth graphs into rates of sedimentation and sea level rise without having investigated and calibrated for on-going consolidation in the top-part of the sediment sequence; i.e. the zone of active compaction. Therefore, the necessity of multi-parameter analyses is strongly proposed. © 2010 Elsevier Ltd and INQUA.

Loading Paleogeophysics and Geodynamics collaborators
Loading Paleogeophysics and Geodynamics collaborators