Preprints
https://doi.org/10.5194/acp-2021-307
https://doi.org/10.5194/acp-2021-307

  31 May 2021

31 May 2021

Review status: this preprint is currently under review for the journal ACP.

Twenty years of ground-based NDACC FTIR spectrometry at Izaña Observatory – overview and long-term comparison to other techniques

Omaira E. García1, Matthias Schneider2, Eliezer Sepúlveda1, Frank Hase2, Thomas Blumenstock2, Emilio Cuevas1, Ramón Ramos1, Jochen Gross2, Sabine Barthlott2, Amelie N. Röhling2, Esther Sanromá1,a, Yenny González1,3, Ángel J. Gómez-Peláez1,b, Mónica Navarro-Comas4, Olga Puentedura4, Margarita Yela4, Alberto Redondas1, Virgilio Carreño1, Sergio F. León-Luis1, Enrique Reyes1, Rosa D. García1,5, Pedro P. Rivas1, Pedro M. Romero-Campos1, Carlos Torres1, Natalia Prats1, Miguel Hernández6, and César López7 Omaira E. García et al.
  • 1Izaña Atmospheric Research Centre (IARC), State Meteorological Agency of Spain (AEMet), Santa Cruz de Tenerife, Spain
  • 2Karlsruhe Institute of Technology (KIT), Institute of Meteorology and Climate Research (IMK-ASF), Karlsruhe, Germany
  • 3Cimel Electronique, Paris, France
  • 4Atmospheric Research and Instrumentation Branch, National Institute for Aerospace Technology (INTA), Madrid, Spain
  • 5Group of Atmospheric Optic, University of Valladolid, Valladolid, Spain
  • 6Canarias Delegation, State Meteorological Agency of Spain (AEMet), Santa Cruz de Tenerife, Spain
  • 7Sieltec Canarias S.L., La Laguna, Spain
  • anow at: Employment Observatory of the Canary Islands (OBECAN), Santa Cruz de Tenerife, Spain
  • bnow at: Asturias Delegation, State Meteorological Agency of Spain (AEMet), Oviedo, Spain

Abstract. High-resolution Fourier Transform InfraRed (FTIR) solar observations are particularly relevant for climate studies, as they allow atmospheric gaseous composition and multiple climate processes to be monitored in detail. In this context, the present paper provides an overview of 20 years of FTIR measurements taken in the framework of the NDACC (Network for the Detection of Atmospheric Composition Change) from 1999 to 2018 at the subtropical Izaña Observatory (IZO, Spain). Firstly, long-term instrumental performance is comprehensively assessed, corroborating the temporal stability and reliable instrumental characterisation of the two FTIR spectrometers installed at IZO since 1999. Then, the time series of all trace gases contributing to NDACC at IZO are presented (i.e. C2H6, CH4, ClONO2, CO, HCl, HCN, H2CO, HF, HNO3, N2O, NO2, NO, O3, OCS, and water vapour isotopologues H216O, H218O, and HD16O), reviewing the major accomplishments drawn from these observations. In order to examine the quality and long-term consistency of the IZO FTIR observations, a comparison of those NDACC products for which other high-quality measurement techniques are available at IZO has been performed (i.e. CH4, CO, H2O, NO2, N2O, and O3). This quality assessment was carried out on different timescales to examine what temporal signals, and to what extent, are captured by the FTIR records. After 20 years of operation, the IZO NDACC FTIR observations have been found to be very consistent and reliable over time, demonstrating great potential for climate research. Long-term NDACC FTIR data sets, such as IZO, are indispensable tools for the investigation of atmospheric composition trends, multi-year phenomena and complex climate feedback processes, as well as for the validation of past and present space-based missions and chemistry climate models.

Omaira E. García et al.

Status: open (until 12 Jul 2021)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Review of Twenty years of ground-based NDACC FTIR spectrometry at Izaña Observatory - overview and long-term comparison to other techniques by Garcia et al.', Anonymous Referee #1, 16 Jun 2021 reply
  • RC2: 'Comment on acp-2021-307', Anonymous Referee #3, 16 Jun 2021 reply
  • RC3: 'Comment on acp-2021-307', Anonymous Referee #2, 21 Jun 2021 reply

Omaira E. García et al.

Omaira E. García et al.

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Short summary
This paper analyses the potential of ground-based Fourier Transform Infrared (FTIR) solar observations to monitor atmospheric gaseous composition and investigate multiple climate processes. To this end, this work reviews the FTIR programme of one of most relevant ground-based FTIR stations at a global scale, the subtropical Izaña Observatory (IZO, Spain), going over its history during its first 20 years of operation (1999–2018) and exploring its great value for long-term climate research.
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