Journal cover Journal topic
Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 3.400 IF 3.400
  • IF 5-year value: 3.841 IF 5-year
    3.841
  • CiteScore value: 3.71 CiteScore
    3.71
  • SNIP value: 1.472 SNIP 1.472
  • IPP value: 3.57 IPP 3.57
  • SJR value: 1.770 SJR 1.770
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 70 Scimago H
    index 70
  • h5-index value: 49 h5-index 49
Discussion papers
https://doi.org/10.5194/amt-2019-297
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-2019-297
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 18 Oct 2019

Submitted as: research article | 18 Oct 2019

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Measurement Techniques (AMT).

Comparison of GTO-ECV and Adjusted-MERRA total ozone columns from the last two decades and assessment of interannual variability

Melanie Coldewey-Egbers1, Diego Loyola1, Gordon Labow2,3, and Stacey Frith2,3 Melanie Coldewey-Egbers et al.
  • 1German Aerospace Centre (DLR), Remote Sensing Technology Institute, Oberpfaffenhofen, Germany
  • 2Science Systems and Applications Inc., Lanham, Maryland, USA
  • 3Atmospheric Chemistry and Dynamics Laboratory, Code 614, NASA Goddard Space Flight Center, Greenbelt, Maryland, USA

Abstract. In this study we compare the satellite-based GOME-type Total Ozone Essential Climate Variable (GTO-ECV) record, generated as part of the European Space Agency's Climate Change Initiative (ESA-CCI) ozone project, with the Adjusted total ozone product from the Modern Era Retrospective Analysis for Research and Applications version 2 (Adjusted-MERRA) reanalysis, produced at the National Aeronautics and Space Administration (NASA) Global Modeling and Assimilation Office (GMAO). Total ozone columns and associated standard deviations show a very good agreement in terms of both spatial and temporal patterns during their 23-year overlap period from July 1995 to December 2018. The mean difference between Adjusted-MERRA and GTO-ECV 5° × 5° monthly mean total ozone columns is −0.9 ± 1.5 %. A small discontinuity in the deviations is detected in October 2004 when data from the Ozone Monitoring Instrument (OMI) was ingested in the GTO-ECV data record. This induces a small overall negative drift in the differences for almost all latitude bands, which, however, does not exceed 1 % decade−1. The mean difference for the period prior to October 2004 is −0.5 ± 1.7 %, whereas the difference is −1.1 ± 1.2 % for the second period. The variability in the differences is considerably reduced in the later period due to significant increase in data coverage and sampling. In the tropical region the differences indicate a slight zonal variability with negative deviations over the Atlantic, Africa, and the Indian Ocean, and positive deviations over the Pacific. Ozone anomalies and the distribution of their statistical moments indicate a very high correlation among both data records as to the temporal and spatial structures. Furthermore, we evaluate the consistency of the datasets by means of an empirical orthogonal function (EOF) analysis. The interannual variability is assessed in the tropics, and both GTO-ECV and Adjusted-MERRA exhibit a remarkable agreement with respect to the derived patterns. The first four EOFs can be attributed to different modes of interannual climate variability, and correlations with the Quasi-Biennial Oscillation (QBO), the El Niño Southern Oscillation (ENSO) signal, and the solar cycle were found.

Melanie Coldewey-Egbers et al.
Interactive discussion
Status: open (until 13 Dec 2019)
Status: open (until 13 Dec 2019)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement
Melanie Coldewey-Egbers et al.
Melanie Coldewey-Egbers et al.
Viewed  
Total article views: 131 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
114 16 1 131 0 1
  • HTML: 114
  • PDF: 16
  • XML: 1
  • Total: 131
  • BibTeX: 0
  • EndNote: 1
Views and downloads (calculated since 18 Oct 2019)
Cumulative views and downloads (calculated since 18 Oct 2019)
Viewed (geographical distribution)  
Total article views: 83 (including HTML, PDF, and XML) Thereof 83 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 
Cited  
Saved  
No saved metrics found.
Discussed  
No discussed metrics found.
Latest update: 14 Nov 2019
Publications Copernicus
Download
Short summary
We compare total ozone columns from the satellite-based GOME-type Total Ozone Essential Climate Variable record and the Modern Era Retrospective Analysis for Research and Applications version 2 reanalysis during their overlap period from 1995 to 2018. Ozone columns and anomalies show a very good agreement in terms of spatial and temporal patterns. In the tropics the interannual variability is assessed by means of an EOF analysis and both data records show a remarkable consistency.
We compare total ozone columns from the satellite-based GOME-type Total Ozone Essential Climate...
Citation