Es gibt keinen Anstieg bei Anzahl oder Stärke von Wetterextremen!
Der IPCC selber hat hierzu eine klare Meinung:
5. IPCC-Weltklimabericht der Arbeitsgruppe 1 (WGI-AR5) aus Sept. 2013 bzw. Jan. 2014
https://www.ipcc.ch/site/assets/uploads/2018/03WG1AR5_SummaryVolume_FINAL.pdf
Dürre
PCC 2013, AR5, WGI, Technical Summery, Page 50, .pdf-page: 66:
”There is low confidence in a global-scale observed trend in drought or dryness (lack of rainfall), owing to lack of direct observations, dependencies of inferred trends on the index choice and geographical inconsistencies in the trends.”
Fluten:
IPCC 2013, AR5, WGI, Technical Summery, page 112, .pdf-page:128:
”There continues to be a lack of evidence and thus low confidence regarding the sign of trend in the magnitude and/or frequency of floods on a global scale over the instrumental record.”
Gewitter/Hagel:
IPCC 2013, AR5, WGI, Kapitel 2, Seite 216, .pdf-Seite: 232:
“In summary, there is low confidence in observed trends in small-scale severe weather phenomena such as hail and thunderstorms because of historical data inhomogeneities and inadequacies in monitoring systems.”
Tropische Stürme generell:
IPCC 2013, AR5, WGI, Kapitel 2, Seite 216, .pdf-Seite: 232:
“Current datasets indicate no significant observed trends in global tropical cyclone frequency over the past century and it remains uncertain whether any reported longterm increases in tropical cyclone frequency are robust, after accounting for past changes in observing capabilities"
Tropische Stürme Atlantik Hurricane:
IPCC 2013, AR5, WGI, Kapitel 2, Seite 216, .pdf-Seite: 232:
“No robust trends in annual numbers of tropical storms, hurricanes and major hurricanes counts have been identified over the past 100 years in the North Atlantic basin.”
So ganz globalgalaktisch:
IPCC 2013, AR5, WGI, Kapitel 2, Seite 219, .pdf-Seite: 235:
“There is limited evidence of changes in extremes associated with other climate variables since the mid-20th century.”
Extreme Winde (Tornados usw.):
IPCC 2013, AR5, WGI, Kapitel 2, Seite 220, .pdf-Seite: 236:
“In summary, confidence in large scale changes in the intensity of extreme extratropical cyclones since 1900 is low. There is also low confidence for a clear trend in storminess proxies over the last century due to inconsistencies between studies or lack of long-term data in some parts of the world (particularly in the SH). Likewise, confidence in trends in extreme winds is low, owing to quality and consistency issues with analysed data.”
Die Aussage über tropische Stürme wurde 2018 nochmal verschärft:
https://www.ipcc.ch/site/assets/uploads/2018/03/SREX_Full_Report-1.pdf (Seite 8)
"There is low confidence in any observed long-term (i.e., 40 years or more) increases in tropical cyclone activity (i.e.,intensity, frequency, duration), after accounting for past changes in observing capabilities. "
Ist der CO2 Anteil deutlich angestiegen seit 1950? Ja. Es gibt keine Korrelation zwischen Stärke und Häufigkeit von Wetterextremen und dem Anstieg des CO2 Gehalts in der Atmosphäre.
Gruß Tungsten