tag:blogger.com,1999:blog-18101847.post4451499744817383582..comments2021-07-06T21:36:19.568-07:00Comments on The Onymous Guy: The real FTIR spectrum of CO2 (wonkish)Unknownnoreply@blogger.comBlogger4125tag:blogger.com,1999:blog-18101847.post-77752820001837316102017-05-26T10:34:41.395-07:002017-05-26T10:34:41.395-07:00I have left these comments here without response, ...I have left these comments here without response, since anyone with a background in molecular spectroscopy or atmospheric chemistry can see who is full of shyte and who is not.<br /><br />It is apparent from these comments and elsewhere that this troll does not comprhend the difference between E_photon and E_total, as well as the consequence of non-overlap of gas phase absorption spectra.OnymousGuyhttps://www.blogger.com/profile/09132474758071908026noreply@blogger.comtag:blogger.com,1999:blog-18101847.post-71634924550680286812016-03-29T00:36:59.098-07:002016-03-29T00:36:59.098-07:00You are being quite disingenuous. The problem as y...You are being quite disingenuous. The problem as you think is outdated texts on my part? Try your failure to apply the correct methods to the problem, just like Diamond has done.<br /><br />Stick to chemical spectroscopy in the lab. You know nothing about atmospheric science:<br /><br />http://journals.co-action.net/index.php/tellusb/article/viewFile/14788/16601<br /><br />Chuck Wiese<br />MeteorologistAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-18101847.post-40586310164778729082016-03-26T09:06:59.763-07:002016-03-26T09:06:59.763-07:00Chuck Wiese, there are really no significant calcu...Chuck Wiese, there are really no significant calculations in the spectra. These are all <b>experimental</b> results. <br><br /><br />All spectra were recorded on a Perkin-Elmer SPECTRUM GX FTIR, using a 10 cm cell with KCl windows.<br><br /><br />In this run, the 10 cm cell was first evacuated, then used to measure a baseline; subsequently it was filled to a pressure of about 100 torr with CO2 obtained from sublimation of dry ice at ambient temperature (approximately 18°C). <br><br /><br />These spectra used 64 scans from 370 cm-1 to 7000 cm-1 with a resolution of 0.25 cm-1, conditions of moderate resolution.<br><br /><br />The amount of CO2 in the atmosphere is now about 400 ppm, 0.04% or about 0.30 torr. CO2 in respired breath is one hundred times larger, about 30 torr. So the amount of CO2 in the 10 cm cell used in these experiments corresponds to that in a 3 meter path length through the atmosphere under current conditions. Previous measurements had demonstrated that bringing the 10 cm cell up to ambient pressure through addition of a buffer gas such as N2 did not result in any significant line broadening under these same conditions of moderate resolution and was an unnecessary step.<br><br /><br />As noted in the post, the only equation used is the Beer-Lambert law relating absorption A and the transmission coefficient T<br /><br><br />A = - log_10 T<br /><br><br />T = 10^-A. <br><br /><br />The features appearing in these spectra, such as the Fermi resonance, are not observable under conditions of low resolution, one cm-1 or greater. Here, using moderate resolution, 0.25 cm-1, the rotational and isotopic fine structure within the 670 cm-1 band are easily resolved. <br><br /> <br />It is my suspicion that you are relying on textbooks from the '50s and '60s for your ideas and that you are not familiar with modern spectroscopy and the resolution possible under routine conditions either in the lab or the field.OnymousGuyhttps://www.blogger.com/profile/09132474758071908026noreply@blogger.comtag:blogger.com,1999:blog-18101847.post-24724112179737801152016-03-25T22:33:27.767-07:002016-03-25T22:33:27.767-07:00Onymous Guy: You, like Jim Diamond are clueless. ...Onymous Guy: You, like Jim Diamond are clueless. Try moving your experiment out of doors into the real world and you'll get a completely different result. Classroom experiments like yours don't cut it. One would think you would be bright enough to see this but apparently not. <br /><br />What equation did you use to compute absorption and re-emission and at what temperatures and pressures? How is ANYTHING you did a comparative to making your computations in an earth atmospheric system and how did your "experiment" come even close to replicating reality?<br /><br />Try studying some atmospheric science before stepping on your crank like this like Diamond has already done.<br /><br />Chuck Wiese<br />MeteorologistAnonymousnoreply@blogger.com