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Table 3

Characteristics associated with OMI and SCIAMACHY products used in this study. DOI: https://doi.org/10.1525/elementa.291.t3

OMI/MLSGOME-OMIOMI-RALSCIAMACHY

 
Spectral range OMI:
UV-1: 270–314 nm
UV-2: 306–380 nm
MLS:
240 GHz radiances 
GOME:
289–307 nm
325–340 nm
OMI:
269–309 nm
312–330 nm 
UV-1:
266–307 nm
UV-2:
323–336 nm 
326–335 nm
264–675 nm 
RTM TOMRAD VLIDORT Modified GOMETRAN++ SCIATRAN 
Retrieval method LNMa OEMa OEMa LNMa 
A priori Ozonesondes
SAGE/MLS
(McPeters et al., 2007) 
McPeters et al. (2007) McPeters et al. (2007) Nadir: TOMS V7 ozone profile shape climatology (Wellemeyer et al., 1997)
Limb: Climatology generated with a chemical transport model (McLinden et al., 2000) 
Tropopause Calculation Based on temperature from NCEP Reanalysis (WMO thermal definitionaBased on temperature from NCEP Reanalysis
(WMO thermal definitiona
Based on temperature from ERA-Interim Reanalysis
(WMO thermal definitiona
Based on temperature and potential vorticity from ECMWF reanalysis, ERA-Interim
(Both WMO thermal and dynamical definitiona
Vertical range Surface to tropopause Surface to tropopause Surface to tropopause Surface to tropopause 
Cloud filter 30% 30% 20% 30% 
Pressure level of peak of vertical sensitivity ~500–300 hPa ~600 hPa ~800 hPa  
Reference Ziemke et al. (2006) Liu et al. (2005, 2007, 2010)
Huang et al. (2017) 
Miles et al. (2015) Ebojie et al. (2014) 
OMI/MLSGOME-OMIOMI-RALSCIAMACHY

 
Spectral range OMI:
UV-1: 270–314 nm
UV-2: 306–380 nm
MLS:
240 GHz radiances 
GOME:
289–307 nm
325–340 nm
OMI:
269–309 nm
312–330 nm 
UV-1:
266–307 nm
UV-2:
323–336 nm 
326–335 nm
264–675 nm 
RTM TOMRAD VLIDORT Modified GOMETRAN++ SCIATRAN 
Retrieval method LNMa OEMa OEMa LNMa 
A priori Ozonesondes
SAGE/MLS
(McPeters et al., 2007) 
McPeters et al. (2007) McPeters et al. (2007) Nadir: TOMS V7 ozone profile shape climatology (Wellemeyer et al., 1997)
Limb: Climatology generated with a chemical transport model (McLinden et al., 2000) 
Tropopause Calculation Based on temperature from NCEP Reanalysis (WMO thermal definitionaBased on temperature from NCEP Reanalysis
(WMO thermal definitiona
Based on temperature from ERA-Interim Reanalysis
(WMO thermal definitiona
Based on temperature and potential vorticity from ECMWF reanalysis, ERA-Interim
(Both WMO thermal and dynamical definitiona
Vertical range Surface to tropopause Surface to tropopause Surface to tropopause Surface to tropopause 
Cloud filter 30% 30% 20% 30% 
Pressure level of peak of vertical sensitivity ~500–300 hPa ~600 hPa ~800 hPa  
Reference Ziemke et al. (2006) Liu et al. (2005, 2007, 2010)
Huang et al. (2017) 
Miles et al. (2015) Ebojie et al. (2014) 

a RTM: Radiative Transfer Model; OEM: optimal estimation method; LNM: Limb-Nadir-Match; WMO thermal definition: the thermal tropopause is defined as the lowest level at which the lapse rate is 2K km–1 or less, provided also that the average lapse rate between this level and all higher levels within 2 km does not exceed 2K km–1 (WMO, 1957); Dynamical definition: the dynamical tropopause is characterized by a sharp gradient in potential vorticity (PV). The value used in the paper to define the tropopause is for PV = 2 pvu.

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