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A sensitivity study of a FTIR retrieval algorithm to uncertainties in surface pressure measurements

S. NICOLAE1,2, A. M. DANDOCSI1,* , A. ILIE1,3, C. RADU1

Affiliation

  1. National Institute of Research and Development for Optoelectronics - INOE 2000, 409 Atomistilor St., 077125, Magurele, Romania
  2. UNST Politehnica of Bucharest, 1-3 Iuliu Maniu Blvd., Bucharest, 061071, Romania
  3. Faculty of Geography, University of Bucharest, 1 Nicolae Balcescu Blvd., 010041, Romania

Abstract

Greenhouse gases contribute to climate change through radiation forcing. To measure their quantities in the atmosphere, the Fourier Transform Infrared technique is being used. Within the Collaborative Carbon Column Observing Network, the raw signal is converted to column amounts of greenhouse gases through atmospheric inversion algorithms. Surface pressure data is required for the processing as a-priori information. This study presents a sensitivity study to surface pressure input data and the quantification of the error budget associated to the pressure input for the standard Collaborative Carbon Column Observing Network algorithm. Results show an inverse linear dependency between the pressure and retrieved quantity and an error estimation and post-processing correction factor is provided..

Keywords

Fourier transform infrared, Greenhouse gases, Sensitivity study, Retrieval algorithm.

Submitted at: April 15, 2025
Accepted at: Oct. 14, 2025

Citation

S. NICOLAE, A. M. DANDOCSI, A. ILIE, C. RADU, A sensitivity study of a FTIR retrieval algorithm to uncertainties in surface pressure measurements, Journal of Optoelectronics and Advanced Materials Vol. 27, Iss. 9-10, pp. 491-510 (2025)