Development of a Quantum-Cascade Laser Absorption Spectrometer for Rapid and Precise Measurement of ¹³C-¹⁸O and ¹⁸O-¹⁸O Clumping in CO2

Kinetic effects bias paleotemperature signals preserved in carbonate ¹³ C- ¹⁸ O clumping. Measurements of ¹⁸ O- ¹⁸ O clumping can resolve these biases. We present a prototype laser spectrometer that simultaneously measures ¹³ C- ¹⁸ O and ¹⁸ O- ¹⁸ O clumping to precisions of <0.25‰.