Originally Posted by
bolthead
I'm not interested in backyard experiments. If someone can point to a link to an experiment where someone might have spent $100,000 out of the many billions of dollars already spent, demonstrating each greenhouse gas. Is water vapour worse than CO2? Is the average water vapour content a lot more than 420 ppm? If so, why don't we have runaway global warming due to water vapour?
Warning. These sorts of questions usually brings these types of threads to a shuddering halt.
NASA has spent a fair bit more than $100,000 on instruments on satellites over many years, that measure water vapour through various levels of the atmosphere and working out some of the answers to these questions. Here's a couple of resources, some of them a few years old but still relevant. Water vapour isn't something that is unheard of, or not considered by atmospheric scientists.
https://www.nasa.gov/topics/earth/fe...r_warming.html
https://www.acs.org/content/acs/en/c...t-the-co2.html