Die Klimakrise sei langfristig viel schwerer zu lösen als eine kurzfristige Pandemie:
– Diese sei Ende 2022 besiegt, das Klimaproblem müsse bis spätestens 2050 gelöst sein.
– Es reiche aber nicht, die Treibhausgase bis dahin um 80 oder 90 Prozent zu senken, das Ziel muss Null Treibhausgase sein.
– Die Welt werde bis dahin aber dreimal so viel Strom brauchen wie heute.
– Und dieses Ziel sei nur mit Hilfe von „neuen, supersicheren, kleinen Atomkraftwerken“ erreichbar.
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(7. Juli 1972)
Indeed, detailed global climatic models (17) suggest that a relative increase in A of only 2 percent is enough to induce extensive glaciation on Earth, which implies that the present climate is extremely sensitive to albedo. This leaves changes in atmospheric composition as a possible explanation. Major variations in the CO2 abundance will have only minor greenhouse effects because the strongest bands are nearly saturated. A change in the present CO2 abundance by a factor of 2 will produce directly a 2° variation in surface temperature (18). The CO2 abundance is highly controlled by silicate-carbonate equilibria; by buffering with seawater, which contains almost 100 times the atmospheric CO2; and by the respiration and photosynthesis feedback loop (19).
(6. Oktober 2008)
Die Ergebnisse zeigten, dass selbst kleine Veränderungen des Magnetfelds die Löslichkeit von Gasen im Wasser verändern. „Wenn das Magnetfeld schwächer war, löste sich 15 Prozent weniger Luft im Wasser als bei einem stärkeren Magnetfeld“, erläutert Winklhofer. „Für Kohlendioxid war der beobachtete Effekt sogar doppelt so stark.“
(August 2008)
Correlations between geomagnetic-field and climate parameters have been suggested repeatedly, but possible links are controversially discussed. Here we test if weak (Earth-strength) magnetic fields can affect climatically relevant properties of seawater. We found the solubility of air in seawater to be by 15% lower under reduced magneticfield (20 mT) compared to normal field conditions (50 mT). The magnetic-field effect on CO2 solubility is twice as large, from which we surmise that geomagnetic field variations modulate the carbon exchange between atmosphere and ocean. A 1% reduction in magnetic dipole moment may release up to ten times more CO2 from the surface ocean than is emitted by subaerial volcanism.
(06.01.2021)
We know that the Earth’s magnetic field has decayed by about 5% per century since measurements began in 1840. And much of that decay is associated with a strangely weak spot between South America and southern Africa, known as the South Atlantic Anomaly. This patch has grown over the last 250 years and today the weak field messes with satellite technology.
(22.05.2020)
According to the European Space Agency (ESA), the magnetic field has lost around 9 percent of its strength over the preceding two centuries. One section of the magnetic field has been found to have weakened considerably since 1970.
This patch, called the South Atlantic Anomaly, sits between Africa and South America. Over the last 50 years, it has grown and moved farther west at a rate of roughly 12 miles per year.
(08.07.2020)
Quicker changes in direction seem to coincide with a local weakening of the magnetic field, the new research found. One shift in particular was highlighted: a movement of 2.5 degrees per year 39,000 years ago, right after the most recent Laschamp excursion flip, when the Earth‘s magnetic field was weakened around the west coast of Central America.
(November 19, 2020)
Effects of Earth’s magnetic field — Science News, November 21, 1970
„Earth’s magnetic field has frequently reversed at intervals of 1 million to 100 million years. A few scientists now suspect that these reversals may have had drastic effects on terrestrial life.… During the past 2.5 million years, eight species of one-cell marine animals called Radiolaria became extinct. Six of these extinctions occurred simultaneously throughout their geographic range immediately following magnetic reversals.“
(19.02.2021)
We find that geomagnetic field minima ~42 ka, in combination with Grand Solar Minima, caused substantial changes in atmospheric ozone concentration and circulation, driving synchronous global climate shifts that caused major environmental changes, extinction events, and transformations in the archaeological record.
(19.02.2021)
Some 42,000 years ago, in an event known as the Laschamp Excursion, the poles did just that for around 800 years, before swapping back — but scientists were unsure exactly how or if it impacted the world.
Now, a team of researchers from Sydney‘s University of New South Wales and the South Australian Museum say the flip, along with changing solar winds, could have triggered an array of dramatic climate shifts leading to environmental change and mass extinctions.
Rafael Grossi, head of the International Atomic Energy Agency (IAEA), arrived in Tehran late Saturday and met with the head of the Iran Atomic Energy Organisation, Ali Akbar Salehi, early Sunday, TV images showed.
Ruling party candidate Mohamed Bazoum is seen by many as the favourite after leading in the first round on Dec. 27 with 39.3% of the vote. He is up against former president Mahamane Ousmane, who scored 17%.
45 Porträts sozialer Aktivist:innen und Kämpfer:innen zieren Mauern und Wände in den Straßen Avenida Boyacá und Calle 80 in Bogotá. Was sie über ihr politisches Engagement hinaus verbindet: Alle fielen in der jüngsten Vergangenheit den kolumbianischen Sicherheitskräften zum Opfer.
They’ll have a chance to take that step forward soon: A re-flight of the mission was just greenlit by NASA. Though the launch date isn’t yet set, the team plans to use the same instrument but with a new technique to measure a much broader swath of the Sun.
“Instead of just measuring the magnetic fields along the very narrow strip, we want to scan it across the target and make a two-dimensional map,” McKenzie said.
f Ingenuity succeeds in taking off and hovering during its first flight, over 90% of the project’s goals will have been achieved. If the rotorcraft lands successfully and remains operable, up to four more flights could be attempted, each one building on the success of the last.
“We are in uncharted territory, but this team is used to that,” said MiMi Aung, project manager for the Ingenuity Mars Helicopter at JPL.