Trends of tropical tropospheric ozone from 20 years of European satellite measurements and perspectives for the Sentinel-5 Precursor

Heue, Klaus-Peter; Coldewey‐Egbers, Melanie; Delcloo, Andy; Lerot, Christophe; Loyola, Diego; Valks, Pieter; Roozendaël, Michel Van

doi:10.5194/amt-9-5037-2016

Cited by 54 publications

(69 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A deeper investigation is needed to understand the contributions of tropospheric column ozone and stratospheric column ozone to total column ozone, especially considering uncertainties carefully, but this is beyond the scope of this work. We note that studies using various data sources show less significant regional increases (and some decreases), with global estimates ranging from 0.2 to 0.7 % per year (∼ 0.6-2 DU per decade) (Cooper et al, 2014;Ebojie et al, 2016;Heue et al, 2016), though these estimates considered different time periods. This suggests a large range of uncertainty, but even the lower end of the estimated increases in tropospheric column ozone are in line with the missing part of the total column ozone change, after considering stratospheric column ozone that we estimate here.…”

Section: Tropospheric Ozone Contribution To Total Column Ozonementioning

confidence: 99%

Evidence for a continuous decline in lower stratospheric ozone offsetting ozone layer recovery

et al. 2018

View full text Add to dashboard Cite

Abstract. Ozone forms in the Earth's atmosphere from the photodissociation of molecular oxygen, primarily in the tropical stratosphere. It is then transported to the extratropics by the Brewer-Dobson circulation (BDC), forming a protective "ozone layer" around the globe. Human emissions of halogen-containing ozone-depleting substances (hODSs) led to a decline in stratospheric ozone until they were banned by the Montreal Protocol, and since 1998 ozone in the upper stratosphere is rising again, likely the recovery from halogeninduced losses. Total column measurements of ozone between the Earth's surface and the top of the atmosphere indicate that the ozone layer has stopped declining across the globe, but no clear increase has been observed at latitudes between 60 • S and 60 • N outside the polar regions (60-90 • ). Here we report evidence from multiple satellite measurements that ozone in the lower stratosphere between 60 • S and 60 • N has indeed continued to decline since 1998. We find that, even though upper stratospheric ozone is recoverPublished by Copernicus Publications on behalf of the European Geosciences Union. 1380 W. T. Ball et al.: Continuous stratospheric ozone decline ing, the continuing downward trend in the lower stratosphere prevails, resulting in a downward trend in stratospheric column ozone between 60 • S and 60 • N. We find that total column ozone between 60 • S and 60 • N appears not to have decreased only because of increases in tropospheric column ozone that compensate for the stratospheric decreases. The reasons for the continued reduction of lower stratospheric ozone are not clear; models do not reproduce these trends, and thus the causes now urgently need to be established.

show abstract

Section: Tropospheric Ozone Contribution To Total Column Ozonementioning

confidence: 99%

Evidence for a continuous decline in lower stratospheric ozone offsetting ozone layer recovery

et al. 2018

View full text Add to dashboard Cite

show abstract

“…In a similar manner, OCRA and ROCINN results will be used in the following operational TROPOMI/S5P trace gas retrieval products: total ozone (Loyola et al, 2017), tropospheric ozone (Heue et al, 2016), formaldehyde, and sulfur dioxide (Theys et al, 2017).…”

Section: Overview Of the Cloud Retrieval Algorithmsmentioning

confidence: 99%

The operational cloud retrieval algorithms from TROPOMI on board Sentinel-5 Precursor

et al. 2018

Self Cite

View full text Add to dashboard Cite

Abstract. This paper presents the operational cloud retrieval algorithms for the TROPOspheric Monitoring Instrument (TROPOMI) on board the European Space Agency Sentinel-5 Precursor (S5P) mission scheduled for launch in 2017.Two algorithms working in tandem are used for retrieving cloud properties: OCRA (Optical Cloud Recognition Algorithm) and ROCINN (Retrieval of Cloud Information using Neural Networks). OCRA retrieves the cloud fraction using TROPOMI measurements in the ultraviolet (UV) and visible (VIS) spectral regions, and ROCINN retrieves the cloud top height (pressure) and optical thickness (albedo) using TROPOMI measurements in and around the oxygen A-band in the near infrared (NIR).Cloud parameters from TROPOMI/S5P will be used not only for enhancing the accuracy of trace gas retrievals but also for extending the satellite data record of cloud information derived from oxygen A-band measurements, a record initiated with the Global Ozone Monitoring Experiment (GOME) on board the second European Remote-Sensing Satellite (ERS-2) over 20 years ago.The OCRA and ROCINN algorithms are integrated in the S5P operational processor UPAS (Universal Processor for UV/VIS/NIR Atmospheric Spectrometers), and we present here UPAS cloud results using the Ozone Monitoring Instrument (OMI) and GOME-2 measurements. In addition, we examine anticipated challenges for the TROPOMI/S5P cloud retrieval algorithms, and we discuss the future validation needs for OCRA and ROCINN.

show abstract

“…The tropospheric ozone trends have been calculated with the regression model described in Section 3.1, using tropospheric O 3 data from our study (first two columns of Table 3). Additionally, tropospheric 15 ozone data created by Heue et al (2016) using the CCD method as well on GOME, SCIAMACHY, GOME-2 and OMI satellite measurements from July 1995-December 2015 (data taken from: http://www.esa-ozone-cci.org/?q=node/160) are presented in the third column of Table 3 …”

mentioning

confidence: 99%

“…Most recently, Heue et al (2016) published a study about 30 tropical tropospheric ozone trends using the CCD method on a harmonised dataset consisting of data retrieved from GOME, SCIAMACHY, GOME-2 and OMI satellite instruments from July 1995-December 2015 which are based upon different total ozone and cloud retrievals as well as merging approaches. The mean tropical tropospheric ozone trend that they found is 0.7…”

mentioning

confidence: 99%

Harmonisation and trends of 20-years tropical tropospheric ozone data

Leventidou¹,

Weber²,

Eichmann³

et al. 2017

Preprint

View full text Add to dashboard Cite

Abstract. Using the convective clouds differential (CCD) method on total ozone and cloud data from three European satellite instruments GOME/ ERS-2 (1995ERS-2 ( -2003, SCIAMACHY/Envisat (2002, and GOME-2/MetOp-A (2007)(2008)(2009)(2010)(2011)(2012)(2013)(2014)(2015) it is possible to retrieve tropical tropospheric columns of ozone (TTCO) which are in good agreement with in-situ measurements. Finally, the datasets have been harmonised applying no correction to GOME data while GOME-2 has been corrected using for each grid-box the mean bias with respect SCIAMACHY for the years of common operation (2007)(2008)(2009)(2010)(2011)(2012). Depending on the choice of harmonisation, the magnitude, pattern, and uncertainty of the trend can strongly vary. The harmonisation represents an additional source of uncertainty in the merged dataset and derived trend estimates. For the preferred harmonised dataset,

show abstract

Trends of tropical tropospheric ozone from 20 years of European satellite measurements and perspectives for the Sentinel-5 Precursor

Cited by 54 publications

References 40 publications

Evidence for a continuous decline in lower stratospheric ozone offsetting ozone layer recovery

Evidence for a continuous decline in lower stratospheric ozone offsetting ozone layer recovery

The operational cloud retrieval algorithms from TROPOMI on board Sentinel-5 Precursor

Harmonisation and trends of 20-years tropical tropospheric ozone data

Contact Info

Product

Resources

About