Mutig, was der MDR in einem Artikel im Februar 2020 über das Thema Trockenheit so schreibt. Der öffentlich-rechtliche Sender schwimmt hier eindeutig gegen den Mainstream. Der Artikel zitiert Sebastian Balders vom Deutschen Wetterdienst in Leipzig. Wir wissen nicht, ob Herr Balders möglicherweise mal reich geerbt hat und deshalb ohne Angst um den Job Aussagen treffen kann oder ob er nur das ist, was man einen Wissenschaftler nennt, der Zahlen wissenschaftlich bewertet.
„Wenn er ganz nüchtern die Zahlen betrachtet, dann kommt man zu einem anderen Schluss: „In den letzten 30 Jahren, so ab 1990, da kann man sehen, dass die nassen Jahre tendenziell sogar etwas zugenommen haben.“
„Es gab immer schon trockene Sommer.“
Sebastian Balders hat sich die Zahlen, die Niederschlagsmengen angeschaut, die seit 1871 sehr zuverlässig notiert werden. Einen Trend zu immer weniger Niederschlag kann er – wie gesagt – überhaupt nicht feststellen. Zwei trockene Sommer, erklärt er, lassen da keinerlei Aussagen zu.“
„Der Experte erklärt, Klimamodellierungen anhand der letzten 100 Jahre gäben keinen Aufschluss darüber, ob der Niederschlag in Deutschland zu- oder abnehme. „Und global gesehen auf die ganze Welt projiziert, ist das schlichtweg unmöglich“, ergänzt der Wetterforscher.“
Interessant auch die Kommentare unter dem Artikel und wie diese vom MDR moderiert werden.
+++
Filmempfehlung:
Beige Reef – Presented By Dr Jennifer Marohasy
IPA Senior Fellow Dr Jennifer Marohasy presents this short film which allows Australians to see for themselves that claims that the Great Barrier Reef is in crisis are not true. A key claim in a January 2016 article in the scientific journal, Nature, is that there are no longer any living colonies of Acropora – a particular type of coral – at Stone Island off Bowen Harbour in the Whitsundays, and that other corals are now covered in mud. Dr Peter Ridd’s path to dismissal by James Cook University began with an email questioning claims that the corals at Stone Island were bleached, dead and reduced to mudflats. Dr Marohasy and her team went to find out the true state of the coral reefs around Stone Island. What they found contradicts the Nature paper and proves this key reef system is very much alive. Filmed and edited by: Clint Hempsall, Sea Image Productions. For more information visit: Dr Marohasy’s blog at www.jennifermarohasy.com or the IPA website at ipa.org.au/research-areas/climate-change.
Hintergrundinformationen hier.
+++
Vor gut 10 Jahren erschütterte der Climategate-Skandal die Klimawissenschaften. Durch einen Internet-Hack kamen unzählige Emails ans Licht, in denen einige Klimawissenschaftler dabei ertappt wurden, wie sie die Klimagefahr dramatisierten und ungeliebte Kritiker ausgrenzten. Judith Curry fasste die Geschichte kürzlich in ihrem Blog zusammen. Auch auf WUWT und bei Roy Spencer war das Jubiläum Thema.
+++
DIE WELT am 27.10.2019:
Umweltpreis-Verleihung: Steinmeier sendet eine Warnung an die Klimaaktivisten
Der Bundespräsident lobt Fridays for Future und warnt die Klimabewegung gleichzeitig. Die Enttäuschung über noch nicht Erreichtes dürfe nicht zu Demokratie-Entfremdung führen. Es müsse verhindert werden, dass Klimaschutz die Gesellschaft spaltet.
Bundespräsident Frank-Walter Steinmeier hat dazu aufgefordert, im Streit über mehr Klimaschutz auf die Demokratie zu vertrauen. „Ich warne davor, dass wir die Möglichkeiten der Demokratie kleinerreden, je größer, ja apokalyptischer wir die Herausforderung beschreiben“, sagte er am Sonntag laut Redemanuskript bei der Verleihung des Deutschen Umweltpreises in Mannheim.
Weiterlesen auf welt.de
+++
Pressemitteilung des MIT am 25.10.2020:
Engineers develop a new way to remove carbon dioxide from air
The process could work on the gas at any concentrations, from power plant emissions to open air
A new way of removing carbon dioxide from a stream of air could provide a significant tool in the battle against climate change. The new system can work on the gas at virtually any concentration level, even down to the roughly 400 parts per million currently found in the atmosphere.
Most methods of removing carbon dioxide from a stream of gas require higher concentrations, such as those found in the flue emissions from fossil fuel-based power plants. A few variations have been developed that can work with the low concentrations found in air, but the new method is significantly less energy-intensive and expensive, the researchers say.
The technique, based on passing air through a stack of charged electrochemical plates, is described in a new paper in the journal Energy and Environmental Science, by MIT postdoc Sahag Voskian, who developed the work during his PhD, and T. Alan Hatton, the Ralph Landau Professor of Chemical Engineering.
The device is essentially a large, specialized battery that absorbs carbon dioxide from the air (or other gas stream) passing over its electrodes as it is being charged up, and then releases the gas as it is being discharged. In operation, the device would simply alternate between charging and discharging, with fresh air or feed gas being blown through the system during the charging cycle, and then the pure, concentrated carbon dioxide being blown out during the discharging.
As the battery charges, an electrochemical reaction takes place at the surface of each of a stack of electrodes. These are coated with a compound called polyanthraquinone, which is composited with carbon nanotubes. The electrodes have a natural affinity for carbon dioxide and readily react with its molecules in the airstream or feed gas, even when it is present at very low concentrations. The reverse reaction takes place when the battery is discharged — during which the device can provide part of the power needed for the whole system — and in the process ejects a stream of pure carbon dioxide. The whole system operates at room temperature and normal air pressure.
„The greatest advantage of this technology over most other carbon capture or carbon absorbing technologies is the binary nature of the adsorbent’s affinity to carbon dioxide,“ explains Voskian. In other words, the electrode material, by its nature, „has either a high affinity or no affinity whatsoever,“ depending on the battery’s state of charging or discharging. Other reactions used for carbon capture require intermediate chemical processing steps or the input of significant energy such as heat, or pressure differences.
„This binary affinity allows capture of carbon dioxide from any concentration, including 400 parts per million, and allows its release into any carrier stream, including 100 percent CO2,“ Voskian says. That is, as any gas flows through the stack of these flat electrochemical cells, during the release step the captured carbon dioxide will be carried along with it. For example, if the desired end-product is pure carbon dioxide to be used in the carbonation of beverages, then a stream of the pure gas can be blown through the plates. The captured gas is then released from the plates and joins the stream.
In some soft-drink bottling plants, fossil fuel is burned to generate the carbon dioxide needed to give the drinks their fizz. Similarly, some farmers burn natural gas to produce carbon dioxide to feed their plants in greenhouses. The new system could eliminate that need for fossil fuels in these applications, and in the process actually be taking the greenhouse gas right out of the air, Voskian says. Alternatively, the pure carbon dioxide stream could be compressed and injected underground for long-term disposal, or even made into fuel through a series of chemical and electrochemical processes.
The process this system uses for capturing and releasing carbon dioxide „is revolutionary“ he says. „All of this is at ambient conditions — there’s no need for thermal, pressure, or chemical input. It’s just these very thin sheets, with both surfaces active, that can be stacked in a box and connected to a source of electricity.“
„In my laboratories, we have been striving to develop new technologies to tackle a range of environmental issues that avoid the need for thermal energy sources, changes in system pressure, or addition of chemicals to complete the separation and release cycles,“ Hatton says. „This carbon dioxide capture technology is a clear demonstration of the power of electrochemical approaches that require only small swings in voltage to drive the separations.“
In a working plant — for example, in a power plant where exhaust gas is being produced continuously — two sets of such stacks of the electrochemical cells could be set up side by side to operate in parallel, with flue gas being directed first at one set for carbon capture, then diverted to the second set while the first set goes into its discharge cycle. By alternating back and forth, the system could always be both capturing and discharging the gas. In the lab, the team has proven the system can withstand at least 7,000 charging-discharging cycles, with a 30 percent loss in efficiency over that time. The researchers estimate that they can readily improve that to 20,000 to 50,000 cycles.
The electrodes themselves can be manufactured by standard chemical processing methods. While today this is done in a laboratory setting, it can be adapted so that ultimately they could be made in large quantities through a roll-to-roll manufacturing process similar to a newspaper printing press, Voskian says. „We have developed very cost-effective techniques,“ he says, estimating that it could be produced for something like tens of dollars per square meter of electrode.
Compared to other existing carbon capture technologies, this system is quite energy efficient, using about one gigajoule of energy per ton of carbon dioxide captured, consistently. Other existing methods have energy consumption which vary between 1 to 10 gigajoules per ton, depending on the inlet carbon dioxide concentration, Voskian says.
The researchers have set up a company called Verdox to commercialize the process, and hope to develop a pilot-scale plant within the next few years, he says. And the system is very easy to scale up, he says: „If you want more capacity, you just need to make more electrodes.“
Paper: Sahag Voskian, T. Alan Hatton. Faradaic electro-swing reactive adsorption for CO2 capture. Energy & Environmental Science, 2019; DOI: 10.1039/C9EE02412C
+++
Ansgar Neuhof am 24.10.2019 auf Tichys Einblick:
10.000 Milliarden Dollar für den Klima-Hype: Klima: Die gekaufte Rebellion
Vom Milliardär oder Finanzdienstleister bis zum Internationalsozialisten, selbsternannten „Weltverbesserer“, Neue-Weltordnungs-Propagandist oder aufgehetzten „Rebell“ – eine unheilvolle Allianz hat zusammengefunden.
Immer deutlicher tritt bei den Klima-Protesten der Wunsch nach notfalls auch gewaltsamer Überwindung der marktwirtschaftlichen Ordnung und des Systems im allgemeinen hervor. Dabei sind es ausgerechnet „Erzkapitalisten“ aus der Finanzindustrie und Multi-Milliardäre, die die Klimabewegungen organisatorisch und finanziell unterstützen. Siehe zum Beispiel Gretas Milliardäre, die Extinction Rebellion mitfinanzieren.
Weiterlesen auf Tichys Einblick
+++
Scinexx im November 2019:
Lachgas-Emissionen beschleunigen sich: Stickstoff-Ausstoß der Landwirtschaft heizt Klimawandel zusätzlich an
Unterschätzter Klimatreiber: Der weltweite Ausstoß von Lachgas (N2O) steigt immer schneller – und heizt den Klimawandel zusätzlich an. Wie eine Studie belegt, haben sich seit 2009 die Emissionen des potenten Treibhausgases vor allem in Asien und Südamerika deutlich erhöht. Hauptquelle dieses Gases ist höchstwahrscheinlich die übermäßige Stickstoffdüngung der Landwirtschaft. Hier müsse dringend gegengesteuert werden, so die Forscher im Fachmagazin „Nature Climate Change“.
Weiterlesen auf Scinexx