cm-1

The Rabett points to the bending and asymmetric stretching vibrations of CO2, but those are at much different wavenumbers than this mouse has ever seen them. 2565 cm-1?

Bunny's got a new puzzler EliRabett 2010

A lot of polymers used in water bottles have good IR transmission, although not as far out as the bending modes of CO2 @ 526 cm-1.

Bunny's got a new puzzler EliRabett 2010

Alternatively go play around with spectracalc.com. for a 10 m path you lose about 50% at stp in the CO2 bands you can see this by setting the bandpass of the spectrometer to ~2 cm-1 which averages over the lines.

The Simplest Explanation EliRabett 2010

Much further down are radiance tables in both per cm-1 and per micron

Another Try EliRabett 2010

At best it is the asymmetric stretch @ 2565 cm-1, although it might be some combination of overtones/harmonics. basically combinations of stretches and bends.

Bunny's got a new puzzler EliRabett 2010

Because collisional energy transfer to and from the excited molecules is rapid, the chunk of energy 650 cm-1 rapidly degrades into the heat bath of the atmosphere.

Rabett Run EliRabett 2009

In this spectrum, taken at the pole, one sees the influence of water vapor as the sharp lines, mostly at the left, low frequency end, CO2 between 600 and 800 cm-1, and ozone at about 1100 cm-1.

Rabett Run EliRabett 2009

In this spectrum, taken at the pole, one sees the influence of water vapor as the sharp lines, mostly at the left, low frequency end, CO2 between 600 and 800 cm-1, and ozone at about 1100 cm-1.

Archive 2009-03-01 EliRabett 2009

A few of the energetic collisions can vibrationally excite the CO2 to the same 650 cm-1 excited vibrational level.

Rabett Run EliRabett 2009

Briefly put, the process can be defined as a CO2 molecule absorbing a ~650 cm-1 photon equivalent to a thermal energy of about 900 K, and losing that energy to the surrounding bath of atmospheric gases.

Rabett Run EliRabett 2009