“The carbon that will be released as these trees decompose is enough to cancel out an entire year’s worth of net gain by all U.S. forests. And this is only from a single storm,” says Chambers, lead author of an article detailing the team’s findings, “Hurricane Katrina’s Carbon Footprint on Gulf Coast Forests,” published in the Nov. 16 issue of the journal Science.
The study was carried out by researchers at Tulane and the University of New Hampshire. Using NASA satellite sensing technology, ecological field investigations and statistical analysis, the investigators estimate that 320 million large trees were killed or severely damaged by the August 2005 storm.
As the Earth’s climate warms, evidence is accumulating that hurricanes, tornados and frontal systems will gain in energy, producing more violent storms and stronger winds. Increased wind disturbance will cause more tree mortality and damage, and this dead wood will release additional carbon to the atmosphere, potentially amplifying global warming.
Young, healthy forests play a vital role in removing carbon, in the form of carbon dioxide, a greenhouse gas, from the atmosphere by photosynthesis, and are thus important in the battle against warming. These young forests are valued as “carbon sinks,” removing carbon dioxide from the atmosphere and storing it as growing vegetation.
The total amount of carbon stored in a forest is the result of the growth of new and existing trees, and tree death from age and disturbance. Dead trees and downed wood decompose and release carbon to the atmosphere. Thus, an increase in disturbance frequency, for example from more powerful storms, can tilt this balance toward the loss side, reversing the storing process and becoming a source of atmospheric carbon dioxide.
This increase in carbon emissions can enhance global warming in what is termed by scientists a “positive feedback mechanism.” Increased carbon dioxide warms the climate, causing more intense storms and elevated tree mortality, releasing yet more carbon dioxide and further warming the climate.
Arthur Nead | EurekAlert!
Litter is present throughout the world’s oceans: 1,220 species affected
27.03.2017 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung
International network connects experimental research in European waters
21.03.2017 | Leibniz-Institut für Gewässerökologie und Binnenfischerei (IGB)
The Institute of Semiconductor Technology and the Institute of Physical and Theoretical Chemistry, both members of the Laboratory for Emerging Nanometrology (LENA), at Technische Universität Braunschweig are partners in a new European research project entitled ChipScope, which aims to develop a completely new and extremely small optical microscope capable of observing the interior of living cells in real time. A consortium of 7 partners from 5 countries will tackle this issue with very ambitious objectives during a four-year research program.
To demonstrate the usefulness of this new scientific tool, at the end of the project the developed chip-sized microscope will be used to observe in real-time...
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
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