Nettet1. mar. 2005 · Behind the Hockey Stick. Seven years ago Michael Mann introduced a graph that became an iconic symbol of humanity's contribution to global warming. He … Nettet16. mai 2007 · Ice cores show CO 2 increases lag behind temperature rises, disproving the link to global warming Ice cores show CO 2 rising as temperatures fell The cooling after 1940 shows CO 2 does not cause...
Hockeyschläger-Diagramm – Wikipedia
NettetA hockey stick graph or hockey stick curve is a graph, or curve shape, that resembles an ice hockey stick, in that it turns sharply from a nearly flat "blade" to a long "handle". … Nettet8. mar. 2013 · And as climate scientist Michael Mann, creator of the original “hockey stick” graph told Carbon Brief today: “This new study extends and strengthens that result … from san francisco to los angeles drive
After 20 Years, The ‘Hockey Stick’ Graph That ... - CO2 Coalition
NettetThe graph showed world temperatures essentially flat or slightly declining for 900+ years (the shaft of the hockey stick), and then shooting up dramatically during the 20th century era of human carbon dioxide emissions (the blade of the stick). In 2001 the UN’s IPCC came out with its Third Assessment Report on the state of the climate. Hockey stick graphs present the global or hemispherical mean temperature record of the past 500 to 2000 years as shown by quantitative climate reconstructions based on climate proxy records. These reconstructions have consistently shown a slow long term cooling trend changing into … Se mer Paleoclimatology influenced the 19th century physicists John Tyndall and Svante Arrhenius who found the greenhouse gas effect of carbon dioxide (CO2) in the atmosphere to explain how past ice ages had ended. From … Se mer Variations on the "Composite Plus Scale" (CPS) method continued to be used to produce hemispheric or global mean temperature … Se mer While the IPCC Third Assessment Report (TAR) drew on five reconstructions to support its conclusion that recent Northern Hemisphere temperatures were the warmest in the past … Se mer The IPCC Fourth Assessment Report (AR4) published in 2007 included a chapter on Paleoclimate, with a section on the last 2,000 years. This featured a graph showing 12 proxy … Se mer Bradley and Jones 1993 Archives of climate proxies were developed: in 1993 Raymond S. Bradley and Phil Jones composited historical records, tree-rings … Se mer The Huang, Pollack & Shen 2000 borehole temperature reconstruction covering the past five centuries supported the conclusion that 20th … Se mer Using various high-resolution proxies including tree rings, ice cores and sediments, Mann and Jones published reconstructions in … Se mer Nettet16. mai 2007 · Advertisement. The “hockey stick” graph was the result of the first comprehensive attempt to reconstruct the average northern … from san francisco to china