Dank gestiegenem CO2: Bäume auf dem östlichen Tibetplateau mit kräftigem Wachstumsschub

In der Frühphase des Klimaalarmismus wurde zunächst alles und jedes dem Klimawandel angehängt. Auch Malaria gehörte dazu. Heute weiß man, dass das Klima für Malaria nur eine Nebenrolle spielt. Dies wurde im März 2016 erneut von Zhao et al. im Malaria Journal bestätigt:

Exploring the spatiotemporal drivers of malaria elimination in Europe

Background

Europe once had widespread malaria, but today it is free from endemic transmission. Changing land use, agricultural practices, housing quality, urbanization, climate change, and improved healthcare are among the many factors thought to have played a role in the declines of malaria seen, but their effects and relative contributions have rarely been quantified.

Methods

Spatial datasets on changes in climate, wealth, life expectancy, urbanization, and land use trends over the past century were combined with datasets depicting the reduction in malaria transmission across 31 European countries, and the relationships were explored. Moreover, the conditions in current malaria-eliminating countries were compared with those in Europe at the time of declining transmission and elimination to assess similarities.

Results/conclusions

Indicators relating to socio-economic improvements such as wealth, life expectancy and urbanization were strongly correlated with the decline of malaria in Europe, whereas those describing climatic and land use changes showed weaker relationships. Present-day malaria-elimination countries have now arrived at similar socio-economic indicator levels as European countries at the time malaria elimination was achieved, offering hope for achievement of sustainable elimination.

Siehe auch Besprechung auf CO2Science.org.

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An der University of Colorado in Colorado Springs begann nun eine Untersuchung gegen drei Dozenten, die allen klimaskeptisch denkenden Studenten empfahlen, ihren Kurs zum Klimawandel zu verlassen. Die Universitätsführung fand dies hochbedenklich und geht dem Fall nun nach. Man wolle die Studenten ausbilden, nicht indoktrinieren. Eigenes Denken solle gefördert, nicht unterdrückt werden, hieß es seitens der Uni. Nachzulesen in der Washington Times.

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Die Webseite Wetter-Observer.de brachte am 6. Oktober 2016 einen Beitrag zur Entwicklung der Sonnenaktivität der letzten Jahrtausende:

Studie: Sonne war von 1950 bis 2000 so stark, wie seit gut 10.000 Jahren nicht
Ein neues Paper aus dem Jahr 2016 belegt, dass die Sonnenaktivität in den letzten Jahrzehnten (etwa 1950 bis 2000) so stark war, wie noch nie in den letzten 10.000 Jahren:

Weiterlesen auf Wetter-Observer.de

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UN-Generalsekretär Ban Ki-moon hat nun Kraft seines Amtes die Klimadebatte für beendet erklärt. Alles wäre nun bekannt. Reuters berichtete am 4. September 2016:

“The debate over climate phenomenon is over scientifically and environmentally,” said Ban, adding that the influence of climate change deniers or skeptics has waned. “It is affecting our day-to-day life,” Ban said, at a new conference ahead of a G20 summit in the eastern Chinese city of Hangzhou. …

Schlechte Nachrichten für alle Klimaforscher. Denn wenn alles bekannt ist, dann werden ihre Dienste nun nicht mehr benötigt. Noch ist unklar, wann mit den Umschulungsmaßnahmen begonnen werden soll.

Mit Dank an WUWT

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Gute Nachrichten von der University of Oregon am 2. September 2016. Auf dem östlichen Tibetplateau hat sich das Baumwachstum in den letzten Jahren dramatisch beschleunigt, eine Folge des gestiegenen CO2-Gehalts der Atmosphäre, wie die Forscher mitteilen. Baumringuntersuchungen zeigen, dass es den Bäumen in Tibet seit 1760 nicht mehr so gut ging. Der Klimawandel kann also auch durchaus etwas Positives bewirken. Im Folgenden die vollständige Pressemitteilung der Universität Orgeon:

Researcher finds surprise growth in Tibetan forest

Word of mouth from nomadic herders led Lucas Silva into Tibetan forests and grasslands. What his team found was startling: Rapid forest growth in tune with what scientists had been expecting — but not yet seeing — from climatic changes triggered by rising levels of carbon dioxide.

Actual scientific findings to date have turned up declining growths in many forests in the face of a warming climate. Such had also been the case for Silva, who joined the UO’s Environmental Studies Program and Department of Geography in August [2016]. On the eastern Tibetan Plateau, in an area where it was thought that “climatically induced ecological thresholds had not yet been crossed,” Silva’s team found that the increasing availability of soil nutrients and water from thawing permafrost is stimulating the chemistry of the wood in a species of fir trees. “Our results confirmed the reports of local herders and showed a recent increase in tree growth that has been unprecedented since the year 1760,” Silva said. “These result demonstrate that under a specific set of conditions, forests can respond positively to human-induced changes in climate.” The findings were published in Science Advances, an online, open-access publication of the American Association for the Advancement of Science.

Nomads had reported their observations to study co-author Geng Sun of China’s Chengdu Institute of Biology in Sichuan, China. The research team traveled to the region in eastern Tibet, where they found old-growth forests, smaller patches of trees and trees isolated on the perimeter of the forests. “We wanted to take a long term view of changes in tree growth across this gradient,” Silva said. “To do so, we combined tree-ring measurements with laboratory analyses to look for changes in growth as well as chemical signals of climatic change.” Those techniques provided a window on the history of the area’s tree growth. Dramatic increases in growth have coincided with pulses of tree establishment just outside of the forest range but apparently not yet occurring on a broader regional scale, he said. Growth was rapid between the 1930s and 1960s, but even more accelerated in the last three decades.

Research involving plants grown in controlled laboratory and greenhouse conditions have shown that rising carbon dioxide levels can speed plant growth, but field studies have shown that carbon dioxide-induced growth could not counteract the negative effects of rising temperatures and drought stress in many forest ecosystems. The new findings, the researchers said, suggest that studying the synergy of soil-plant-atmosphere interactions might be the key to understanding the past and predicting future changes in forest productivity and distribution. “Our findings could have important implications for the conservation and management of many different species,” Silva said. “However, it is important to note that we sampled a very small area where forests and grasslands coexist. A comprehensive survey of changes in plant diversity throughout the region has yet to be performed.”

Other co-authors on the paper were William Horwath and Xia Zhu-Barker of the University of California, Davis, Ning Wu from Chengdu Institute of Biology in China and Qianlong Liang from Sichuan University in China. Silva earned his doctorate in 2011 from the University of Guelph in Canada. He received a grant to conduct research in Tibet and began working with Chinese collaborators during a postdoctoral stint at the University of California, Davis, where he eventually landed on the faculty in 2013.

Wie hat die deutsche Presse diese gute Nachricht aufgenommen? Eine Google-News-Suche ergibt keinen Treffer. Man zieht es vor, zu den unbequemen Ergebnissen zu schweigen. Hier bei der Kalten Sonne halten wir Sie auf dem Laufenden.