This year Greenland is experiencing one of the warmest summers in its recent history. This heat wave has meant that an international research team is in the unique position of being able to collect important climate data from the changing Arctic.
The scientists also observed changes in water temperature which they measured in fjords at depths ranging from the water surface through to 700 metres. “An initial analysis of our measurement data from the Disko bay, for example, confirmed previous studies. According to this, there has been a clear rise in water temperature at a depth of 200 metres due to changes in ocean currents in the 90s. This warm water probably gets underneath the tips of glaciers where it can additionally promote glacial melting,” according to Allan Cembella.
Heat waves, glacial melting, decline in sea ice: the widespread changes in the Arctic present great challenges for its residents – especially on the west coast of Greenland. Allan Cembella: “We expect the habitats of many marine organisms to shift as a result of the warming. This shift will particularly affect the species that live in flat coastal waters because of late their summer ice cover has always melted. This means that fish stocks are affected in the same way as the plankton, the several species living on the sea bed, the sea birds and marine mammals – and ultimately also humans.”
With the expedition on the MARIA S. MERIAN research ship which ends today, the scientists are for the first time trying to document possible changes in the chemical composition of the fjord water and of the bodies of water in the coastal areas of Greenland and Iceland, and to draw conclusions about possible effects on symbioses in the ocean. “It is our aim to find out the extent to which the great inflow of melt water and resultant changed water properties specifically affect the life cycle of the phytoplankton. To this end we have taken samples of water from areas close to the glaciers and coast in the transition zone to the open sea,” explains Allan Cembella.
These data will be of incalculable scientific value, especially in view of icebergs breaking off glaciers as happened recently at the Petermann Glacier in northern Greenland. “Several different future scenarios have until now assumed that harmful algal blooms will occur more frequently in the Arctic in the course of warming. Our current studies will help us understand whether and to what extent widespread glacial melting provides the chemical and physical foundations for such blooms,” says Allan Cembella.
Ralf Röchert | idw
New plate adds plot twist to ancient tectonic tale
15.08.2017 | Rice University
Global warming will leave different fingerprints on global subtropical anticyclones
14.08.2017 | Institute of Atmospheric Physics, Chinese Academy of Sciences
Physicists at the University of Bonn have managed to create optical hollows and more complex patterns into which the light of a Bose-Einstein condensate flows. The creation of such highly low-loss structures for light is a prerequisite for complex light circuits, such as for quantum information processing for a new generation of computers. The researchers are now presenting their results in the journal Nature Photonics.
Light particles (photons) occur as tiny, indivisible portions. Many thousands of these light portions can be merged to form a single super-photon if they are...
For the first time, scientists have shown that circular RNA is linked to brain function. When a RNA molecule called Cdr1as was deleted from the genome of mice, the animals had problems filtering out unnecessary information – like patients suffering from neuropsychiatric disorders.
While hundreds of circular RNAs (circRNAs) are abundant in mammalian brains, one big question has remained unanswered: What are they actually good for? In the...
An experimental small satellite has successfully collected and delivered data on a key measurement for predicting changes in Earth's climate.
The Radiometer Assessment using Vertically Aligned Nanotubes (RAVAN) CubeSat was launched into low-Earth orbit on Nov. 11, 2016, in order to test new...
A study led by scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg presents evidence of the coexistence of superconductivity and “charge-density-waves” in compounds of the poorly-studied family of bismuthates. This observation opens up new perspectives for a deeper understanding of the phenomenon of high-temperature superconductivity, a topic which is at the core of condensed matter research since more than 30 years. The paper by Nicoletti et al has been published in the PNAS.
Since the beginning of the 20th century, superconductivity had been observed in some metals at temperatures only a few degrees above the absolute zero (minus...
Researchers from the University of Miami (UM) Rosenstiel School of Marine and Atmospheric Science, the Italian Space Agency (ASI), and the Instituto Geofisico--Escuela Politecnica Nacional (IGEPN) of Ecuador, showed an increasing volcanic danger on Cotopaxi in Ecuador using a powerful technique known as Interferometric Synthetic Aperture Radar (InSAR).
The Andes region in which Cotopaxi volcano is located is known to contain some of the world's most serious volcanic hazard. A mid- to large-size eruption has...
16.08.2017 | Event News
04.08.2017 | Event News
26.07.2017 | Event News
16.08.2017 | Physics and Astronomy
16.08.2017 | Materials Sciences
16.08.2017 | Interdisciplinary Research