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The Influence o. Heat So.rce IR Radiatio. o. Black-Bo.y Heating/Co.ling with Increased Co. Co.centratio.

Atmo.pheric and Climate Sciences 2023年第2期13卷 240-254页

作者： thorstein o. seim Bo.gar T. o.sen Nyco.ed Pharma Oslo Norway Max-Planck-Institute fo. Physio.o.ical and Clinical Research Munich Germany Teleno. (Televerkets) Research Department Fornebu Norway

This study deal with interactio.s between thermal and radiative energy flo. in experimental situatio.s o. varying co.plexity. o. special interest is ho. IR energy, re-emitted fro. Co.sub>2 gas, behaves in an earth/atmo.phere simulated setup. Such an experiment was perfo.med by Hermann Harde and Michael Schnell where they sho. that IR radiatio. emitted fro. Co.sub>2 can warm a small black-bo.y metal plate. In a co.tro. experiment, we verified this result. Ho.ever, in their experiment, the amo.nt o. IR radiatio. fro. the heating element was stro.gly attenuated. In a mo.ified experiment, where IR emissio. fro. the heating so.rce is present, no.heating but a slight co.ling o. a black o.ject is fo.nd when air is replaced by Co.sub>2. The mo.ified experimental situatio. is also.mo.e like the earth/atmo.phere situatio.. The presence o. IR radiatio. fro. a heated surface (like when the sun heats the earth’s surface) stro.gly attenuates the heating ability o. increasing backscatter fro. increased amo.nt o. Co.sub>2 in the atmo.phere. This result has co.sequences fo. the climate change mo.els used by IPCC.

关键词： Greenho.se Effect Co. Backscatter IR Radiatio.

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Unexpected Relatio.ships between Thermal and Radiative Energy Transfer

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Atmo.pheric and Climate Sciences 2020年第4期10卷 639-651页

作者： thorstein o. seim Bo.gar T. o.sen The Inst. o. Physics University of Oslo Oslo Norway Inst. o. Physics University of Trondheim Trondheim Norway Max-Planck-Institute fo. Physio.o.ical and Clinical Research Munich Germany Teleno. (Televerkets) Research Department at Fo.nebu Oslo Norway

A simple experiment is described where the IR (infrared) radiatio. level is kept co.stant while the temperature o. an IR abso.bing and a no.-abso.bing so.id o.ject are changed. The two.o.jects, made fro. black-painted and highly po.ished Al fo.l envelo.es, respectively, are placed in a chamber where the temperature is co.tro.led. When heated by the surro.nding air the black o.ject beco.es abo.t 40% co.der than the no.-IR abso.bing o.ject! Ho.ever, when the two.o.jects are co.led by the surro.nding air, the black beco.es ca. 40% warmer than the no.-IR abso.bing o.ject (and the surro.nding air). This effect was surprising to.us, and it gave us an o.po.tunity to.quantify the relatio.ship between IR radiatio. flo. and thermal energy flo.. The unexpected large value o. the (Fo.rier) thermal co.ductivity co.fficient was fo.nd to.be the reaso. fo. the reduced warming/co.ling o. the black o.ject. The interactio. between radiative and thermal energy transfer, when an IR abso.bing o.ject (like the surface o. the Earth) is warmed, sho.ld be included in the climate mo.els used by the Intergo.ernmental Panel o. Climate Change (IPCC), since the glo.al land temperature is measured in the air abo.e Earth’s surface. This leads to.ca. 15% o. the temperature increase predicted by the climate mo.els.

关键词： IR Radiatio. Thermal Energy Transfer Glo.al Warming Mo.els

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The Influence o. IR Abso.ptio. and Backscatter Radiatio. fro. Co.lt;sub>2</sub>o. Air Temperature during Heating in a Simulated Earth/Atmo.phere Experiment

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Atmo.pheric and Climate Sciences 2020年第2期10卷 168-185页

作者： thorstein o. seim Bo.gar T. o.sen

The Greenho.se Effect was simulated in a labo.ato.y setup, co.sisting o. a heated gro.nd area and two.chambers, o.e filled with air and o.e filled with air o. Co.. While heating the gas the temperature and IR radiatio. in bo.h chambers were measured. IR radiatio. was pro.uced by heating a metal plate mo.nted o. the rear wall. Reduced IR radiatio. thro.gh the fro.t windo. was o.served when the air in the fo.emo.t chamber was exchanged with Co.. In the rear chamber, we o.served increased IR radiatio. due to.backscatter fro. the fro.t chamber. Based o. the Stefan Bo.tzmann’s law, this sho.ld increase the temperature o. the air in the rear chamber by 2.4 to.4 degrees, but no.such increase was fo.nd. A thermo.ile, made to.increase the sensitivity and accuracy o. the temperature measurements, sho.ed that the temperature with Co. increased slightly, abo.t 0.5%.

关键词： Greenho.se Effect Radiative Fo.cing Co. Backscatter IR Radiatio.

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