Bottlenecks in the remote sensing of the 13C02/12C02 isotopic ratio from GOSAT measurements

摘要

This paper analyses the feasibility of the remote sensing of the ~(13)CO_2/~(12)CO_2 isotopic ratio in the atmosphere using Thermal And Near infrared Sensorfor carbon Observation-Fourier Transform Spectrometer/Greenhouse gases Observing SATellite (TANSO-FTS/GOSAT) measurements in the near infrared spectral range. We propose a spectral window with distinct ~(13)CO_2 signatures and present retrieval error estimates for different sources of uncertainty such us: measurement noise, spectroscopy and a priori profiles. We define main bottlenecks in the retrieval and discuss if such method can be used to monitor local changes and detect global trends of the isotopic CO_2 ratio in the atmosphere.