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Here we have some interesting skeletons in the climate closet. Once upon a time global cooling was a fashionable topic. Here's an example.
Stephen H. Schneider’s 1970s Snowball Earth
Posted on 14 Sep 16 by JAIME JESSOP • 40 Comments
Kenneth Richard is talking about a massive cover-up of a global cooling consensus in the 60s-80s over at Pierre Gosselin’s NoTricksZone – chief culprit the infamous Wiki climate change revisionist William Connolley. Coincidentally, I was talking about the global cooling scare on here just a few days ago. I mentioned Schneider in particular who, in apaper co-authored with S. I. Rasool published in 1972 says:Effects on the global temperature of large increases in carbon dioxide and aerosol densities in the atmosphere of Earth have been computed. It is found that, although the addition of carbon dioxide in the atmosphere does increase the surface temperature, the rate of temperature increase diminishes with increasing carbon dioxide in the atmosphere. For aerosols, however, the net effect of increase in density is to reduce the surface temperature of Earth . . . . . . An increase by only a factor of 4 in global aerosol background concentration may be sufficient to reduce the surface temperature by as much as 3.5 ° K. If sustained over a period of several years, such a temperature decrease over the whole globe is believed to be sufficient to trigger an ice age.Kenneth Richard cites a 1974 paper by Schneider as one of 285 scientific studies which he believes clearly demonstrates an 83% scientific global cooling consensus at that time. Two years on from his earlier study, Schneider still seems convinced that it is the cooling influence of anthropogenic aerosols, not warming CO2, which is the serious threat to global climate. He changed his mind, as is his scientific perogative, as the weight of evidence swung firmly in favour of an overwhelming warming anthropogenic influence (less generously, one might say he noticed that the wind was blowing in the opposite direction, hopped off the cooling bandwagon and swiftly jumped on the global warming bus). Whatever, he was in no doubt in the early 1970s that the earth had cooled considerably during the 1940s-60s: . . .
Stephen H. Schneider’s 1970s Snowball Earth
Posted on 14 Sep 16 by JAIME JESSOP • 40 Comments
Kenneth Richard is talking about a massive cover-up of a global cooling consensus in the 60s-80s over at Pierre Gosselin’s NoTricksZone – chief culprit the infamous Wiki climate change revisionist William Connolley. Coincidentally, I was talking about the global cooling scare on here just a few days ago. I mentioned Schneider in particular who, in apaper co-authored with S. I. Rasool published in 1972 says:Effects on the global temperature of large increases in carbon dioxide and aerosol densities in the atmosphere of Earth have been computed. It is found that, although the addition of carbon dioxide in the atmosphere does increase the surface temperature, the rate of temperature increase diminishes with increasing carbon dioxide in the atmosphere. For aerosols, however, the net effect of increase in density is to reduce the surface temperature of Earth . . . . . . An increase by only a factor of 4 in global aerosol background concentration may be sufficient to reduce the surface temperature by as much as 3.5 ° K. If sustained over a period of several years, such a temperature decrease over the whole globe is believed to be sufficient to trigger an ice age.Kenneth Richard cites a 1974 paper by Schneider as one of 285 scientific studies which he believes clearly demonstrates an 83% scientific global cooling consensus at that time. Two years on from his earlier study, Schneider still seems convinced that it is the cooling influence of anthropogenic aerosols, not warming CO2, which is the serious threat to global climate. He changed his mind, as is his scientific perogative, as the weight of evidence swung firmly in favour of an overwhelming warming anthropogenic influence (less generously, one might say he noticed that the wind was blowing in the opposite direction, hopped off the cooling bandwagon and swiftly jumped on the global warming bus). Whatever, he was in no doubt in the early 1970s that the earth had cooled considerably during the 1940s-60s: . . .