evidence: The IPCC AR6 presents a strong body of scientific evidence that it is unequivocal that humans have caused the earth’s climate to warm, with a likely human contribution of 0.8 to 1.3 degrees Celsius to global mean temperature since the late 1800s. But what does this anthropogenic global warming mean for Atlantic hurricane activity, or global tropical cyclone activity? Here, we address these questions, starting with those conclusions where we have relatively more confidence. The main text of this web page gives more background discussion. "Detectable" change here will refer to a change that is large enough to be clearly distinguishable from the variability due to natural causes. Our main conclusions are: [...] The relatively conservative confidence levels attached to our Atlantic hurricane projections, and the lack of a claim of detectable anthropogenic influence on Atlantic hurricane activity at this time contrasts with the situation for other climate metrics, such as global mean temperature. The IPCC AR6 concludes that it is unequivocal that humans have caused the earth’s climate to warm, with a likely human contribution of 0.8 to 1.3 degrees Celsius to global mean temperature since the late 1800s. [...] [According to climate change assessments, there is medium confidence for a detectable human contribution to past observed increases in heavy precipitation in general over global land regions and for the United States, although this increase has not been formally detected for hurricane precipitation alone.]