Kai‐Uwe Eichmann
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View article: Harmonisation of sixteen tropospheric ozone satellite data records
Harmonisation of sixteen tropospheric ozone satellite data records Open
The first Tropospheric Ozone Assessment Report (TOAR, 2014–2019) encountered several observational challenges that limited the confidence in estimates of the burden, short-term variability, and long-term changes of ozone in the free tropos…
View article: Extension of the S5P-TROPOMI CCD tropospheric ozone retrieval to mid-latitudes
Extension of the S5P-TROPOMI CCD tropospheric ozone retrieval to mid-latitudes Open
Tropospheric ozone, a key atmospheric pollutant and greenhouse gas, exhibits significant spatio-temporal variability on seasonal, inter-annual, and decadal scales, posing a challenge for satellite observation systems. Methods like the Conv…
View article: Harmonisation of sixteen tropospheric ozone satellite data records
Harmonisation of sixteen tropospheric ozone satellite data records Open
The first Tropospheric Ozone Assessment Report (TOAR, 2014–2019) encountered several observational challenges that limited the confidence in estimates of the burden, short-term variability, and long-term changes of ozone in the free tropos…
View article: Improved convective cloud differential (CCD) tropospheric ozone from S5P-TROPOMI satellite data using local cloud fields
Improved convective cloud differential (CCD) tropospheric ozone from S5P-TROPOMI satellite data using local cloud fields Open
We present the CHORA (Cloud Height Ozone Reference Algorithm) for retrieving tropospheric-ozone columns from S5P-TROPOMI (Sentinel-5 Precursor–TROPOspheric Monitoring Instrument). The method uses a local-cloud reference sector (CLC – CHORA…
View article: Extension of the S5P/TROPOMI CCD tropospheric ozone retrieval to middle latitudes
Extension of the S5P/TROPOMI CCD tropospheric ozone retrieval to middle latitudes Open
Tropospheric ozone, a critical pollutant and greenhouse gas, exhibits spatio-temporal variability, challenging satellite observations. Existing methods like the Convective Cloud Differential (CCD) and Cloud Slicing Algorithms (CSA) are sta…
View article: Improved CCD tropospheric ozone from S5P TROPOMI satellite data using local cloud fields
Improved CCD tropospheric ozone from S5P TROPOMI satellite data using local cloud fields Open
We present the CHORA (Cloud Height Ozone Reference Algorithm) algorithm for retrieving tropospheric ozone columns from S5P/TROPOMI. The method uses a local cloud reference sector (CLC, CHORA Local Cloud) to determine the stratospheric (abo…
View article: Improved CCD tropospheric ozone from S5P/TROPOMI satellite data using local cloud fields
Improved CCD tropospheric ozone from S5P/TROPOMI satellite data using local cloud fields Open
Tropospheric ozone is an important pollutant and greenhouse gas in the Earth’s atmosphere. Due to its short lifespan and dependence on sunlight and precursor emissions from natural and anthropogenic sources, tropospheric ozone exhibi…
View article: Comparative assessment of TROPOMI and OMI formaldehyde observations against MAX-DOAS network column measurements
Comparative assessment of TROPOMI and OMI formaldehyde observations against MAX-DOAS network column measurements Open
The TROPOspheric Monitoring Instrument (TROPOMI), launched in October 2017 on board the Sentinel-5 Precursor (S5P) satellite, monitors the composition of the Earth's atmosphere at an unprecedented horizontal resolution as fine as 3.5 × 5.5…
View article: The Unusual Stratospheric Arctic Winter 2019/20: Chemical Ozone Loss From Satellite Observations and TOMCAT Chemical Transport Model
The Unusual Stratospheric Arctic Winter 2019/20: Chemical Ozone Loss From Satellite Observations and TOMCAT Chemical Transport Model Open
Satellite observations of relevant trace gases and meteorological data from ERA5 were used to describe the dynamics and chemistry of the spectacular Arctic 2019/20 winter/spring season. Exceptionally low total ozone values of slightly less…
View article: Quality assessment of three years of Sentinel-5p TROPOMI NO2 data 
Quality assessment of three years of Sentinel-5p TROPOMI NO2 data  Open
<p>For more than three years now, the first atmospheric satellite of the Copernicus EO programme, Sentinel-5p (S5P) TROPOMI, has acquired spectral measurements of the Earth radiance in the visible range, from which near-real-time (NR…
View article: Tropical Tropospheric Ozone from Sentinel-5P TROPOMI data: Synergy of CCD/CSL retrievals
Tropical Tropospheric Ozone from Sentinel-5P TROPOMI data: Synergy of CCD/CSL retrievals Open
<p>The TROPOspheric Monitoring Instrument (TROPOMI), on board the Sentinel 5 precursor (S5p) satellite, was launched in October 2017. The TROPOMI instrument has high spatial resolution and daily coverage of the Earth. About two years…
View article: The unusual stratospheric Arctic winter 2019/20: Chemical ozone loss from satellite observations and TOMCAT chemical transport model
The unusual stratospheric Arctic winter 2019/20: Chemical ozone loss from satellite observations and TOMCAT chemical transport model Open
Earth and Space Science Open Archive This preprint has been submitted to and is under consideration at Journal of Geophysical Research - Atmospheres. ESSOAr is a venue for early communication or feedback before peer review. Data may be pre…
View article: Ground-based validation of the Copernicus Sentinel-5p TROPOMINO <sub>2</sub> measurements with the NDACC ZSL-DOAS, MAX-DOAS andPandonia global networks
Ground-based validation of the Copernicus Sentinel-5p TROPOMINO <sub>2</sub> measurements with the NDACC ZSL-DOAS, MAX-DOAS andPandonia global networks Open
This paper reports on consolidated ground-based validation results of the atmospheric NO2 data produced operationally since April 2018 by the TROPOMI instrument on board of the ESA/EU Copernicus Sentinel-5 Precursor (S5p) satellite. Tropos…
View article: Quality assessment of two years of Sentinel-5p TROPOMI NO2 data
Quality assessment of two years of Sentinel-5p TROPOMI NO2 data Open
<p>For more than two years now the first atmospheric satellite of the Copernicus EO programme, Sentinel-5p (S5P) TROPOMI, has acquired spectral measurements of the Earth radiance in the visible range, from which near-real-time (NRTI)…
View article: Geophysical validation of two years of Sentinel-5p tropical tropospheric ozone columns
Geophysical validation of two years of Sentinel-5p tropical tropospheric ozone columns Open
<p>Tropospheric ozone damages ecosystems and causes human health problems. The high spatial and temporal variability of ozone concentrations in the troposphere challenges global observing systems to monitor ozone at all relevant scal…
View article: Ozone in the Tropical Troposphere from Sentinel-5P TROPOMI data: CCD and CSL results
Ozone in the Tropical Troposphere from Sentinel-5P TROPOMI data: CCD and CSL results Open
<p>The TROPOspheric Monitoring Instrument (TROPOMI), on board the Sentinel 5 precursor (S5p) satellite, was launched in October 2017. The TROPOMI instrument has high spatial resolution and daily coverage of the Earth. About two years…
View article: SCIAMACHY L2 Ground Processor V. 7 Phase F Re-processing
SCIAMACHY L2 Ground Processor V. 7 Phase F Re-processing Open
SCIAMACHY (SCanning Imaging Absorption spectroMeter for Atmospheric ChartographY) aboard ESA's environmental satellite ENVISAT observed the Earth's atmosphere in limb, nadir, and solar/lunar occultation geometries covering the UV-Visible t…
View article: Harmonisation and trends of 20-year tropical tropospheric ozone data
Harmonisation and trends of 20-year tropical tropospheric ozone data Open
Using a convective-cloud differential (CCD) method, developed in-house and applied to retrievals of total ozone and cloud data from three European satellite instruments (viz. GOME/ERS-2, 1995–2003; SCIAMACHY/Envisat, 2002–2012 and GOME-2/M…
View article: Retrieval of ozone profiles from OMPS limb scattering observations
Retrieval of ozone profiles from OMPS limb scattering observations Open
This study describes a retrieval algorithm developed at the University of Bremen to obtain vertical profiles of ozone from limb observations performed by the Ozone Mapper and Profiler Suite (OMPS). This algorithm is based on the technique …
View article: Harmonisation and trends of 20-years tropical tropospheric ozone data
Harmonisation and trends of 20-years tropical tropospheric ozone data Open
Using the convective clouds differential (CCD) method on total ozone and cloud data from three European satellite instruments GOME/ERS-2 (1995–2003), SCIAMACHY/Envisat (2002–2012), and GOME-2/MetOp-A (2007–2015) it is possible to retrieve …
View article: Retrieval of ozone profiles from OMPS limb scattering observations
Retrieval of ozone profiles from OMPS limb scattering observations Open
This study describes a retrieval algorithm developed at the University of Bremen to retrieve vertical profiles of ozone from limb observations performed by the Ozone Mapper and Profiler Suite (OMPS). This algorithm was originally developed…
View article: Tropical tropospheric ozone columns from nadir retrievals of GOME-1/ERS-2, SCIAMACHY/Envisat, and GOME-2/MetOp-A (1996–2012)
Tropical tropospheric ozone columns from nadir retrievals of GOME-1/ERS-2, SCIAMACHY/Envisat, and GOME-2/MetOp-A (1996–2012) Open
Tropical tropospheric ozone columns are retrieved with the convective cloud differential (CCD) technique using total ozone columns and cloud parameters from different European satellite instruments. Monthly-mean tropospheric column amounts…
View article: Global cloud top height retrieval using SCIAMACHY limb spectra: model studies and first results
Global cloud top height retrieval using SCIAMACHY limb spectra: model studies and first results Open
Cloud top heights (CTHs) are retrieved for the period 1 January 2003 to 7 April 2012 using height-resolved limb spectra measured with the SCanning Imaging Absorption SpectroMeter for Atmospheric CHartographY (SCIAMACHY) on board ENVISAT (E…
View article: UTLS water vapour from SCIAMACHY limb measurementsV3.01 (2002–2012)
UTLS water vapour from SCIAMACHY limb measurementsV3.01 (2002–2012) Open
The SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY (SCIAMACHY) aboard the Envisat satellite provided measurements from August 2002 until April 2012. SCIAMACHY measured the scattered or direct sunlight using different…
View article: Tropical tropospheric ozone columns from nadir retrievals of GOME-1/ERS-2, SCIAMACHY/Envisat, and GOME-2/MetOp-A (1996-2012)
Tropical tropospheric ozone columns from nadir retrievals of GOME-1/ERS-2, SCIAMACHY/Envisat, and GOME-2/MetOp-A (1996-2012) Open
Tropical tropospheric ozone columns are retrieved with the Convective Clouds Differential (CCD) technique using total ozone columns and cloud parameters from different European satellite instruments. Monthly mean tropospheric column amount…