To: PKRBKR who wrote (1377721 ) 10/24/2022 8:54:05 PM From: Wharf Rat Read Replies (1) | Respond to of 1578161 They all include water vapor. In Arrhenius’ 1896 paper we witness the birth of modern climate science. Working with incomplete theoretical basis and a few beams of moonlight, Arrhenius calculated the warming that would result from doubling the CO2 concentration of the atmosphere, a quantity that modern climate scientists call the climate sensitivity. Granted he may have gotten lucky to get what is essentially the right answer, but more importantly his approach was well guided, and brilliantly creative. Along the way, Arrhenius described the water vapor feedback, which about doubles the impact of changing CO2 , and the ice albedo feedback, which is largely responsible for the intensified warming in high latitudes. Although Arrhenius is best known for the Arrhenius equation, which describes the effect of temperature on the rates of chemical reactions, his 1896 paper contribution stands squarely at the foundation of Earth science.geosci.uchicago.edu == NASA - Water Vapor Confirmed as Major Player in Climate Change Water vapor is known to be Earth’s most abundant greenhouse gas, but the extent of its contribution to global warming has been debated. Using recent NASA satellite data, researchers have estimated more precisely than ever the heat-trapping effect of water in the air, validating the role of the gas as a critical component of climate change. Andrew Dessler and colleagues from Texas A&M University in College Station confirmed that the heat-amplifying effect of water vapor is potent enough to double the climate warming caused by increased levels of carbon dioxide in the atmosphere.