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Table 2

Characteristics associated with IASI products used in this study. DOI: https://doi.org/10.1525/elementa.291.t2

IASI-SOFRIDIASI-FORLIIASI-LISAIASI+GOME-2 (LISA)

 
Spectral range 1025–1075 cm–1 1025–1075 cm–1 7 wavelengths in [975–1100 cm–17 in [980–1070 cm–1]
2 in [290–345 nm] 
RTMa SOFRID/
RTTOV 
FORLI KOPRA-KOPRAFIT KOPRA
VLIDORT 
Retrieval method OEMa OEMa Altitude dependent
TPa 
Altitude dependent
TPa 
A priori Obs.a in 2008:
Ozonesondes
MOZAIC-IAGOS
MLS 
McPeters et al. (2007) McPeters et al. (2007) McPeters et al. (2007) 
Tropopause Calculation Based on temperature profile from ECMWF analysis
(WMO thermal definitiona
Based on IASI temperature from Eumetsat Level-2 products
(WMO thermal definitiona
No use of tropopause height estimation No use of tropopause height estimation 
Vertical range Surface to tropopause Surface to tropopause surface to 6 km
6 to 12 km 
surface to 3 km 
Cloud filter 20% 13% 15% 30% 
Pressure level of peak of vertical sensitivity 500–400 hPa ~ 500 hPa 700–540 hPa 800–700 hPa 
Reference Barret et al. (2011) Boynard et al. (2016, 2017), Hurtmans et al. (2012) Dufour et al. (2012) Cuesta et al. (2013) 
IASI-SOFRIDIASI-FORLIIASI-LISAIASI+GOME-2 (LISA)

 
Spectral range 1025–1075 cm–1 1025–1075 cm–1 7 wavelengths in [975–1100 cm–17 in [980–1070 cm–1]
2 in [290–345 nm] 
RTMa SOFRID/
RTTOV 
FORLI KOPRA-KOPRAFIT KOPRA
VLIDORT 
Retrieval method OEMa OEMa Altitude dependent
TPa 
Altitude dependent
TPa 
A priori Obs.a in 2008:
Ozonesondes
MOZAIC-IAGOS
MLS 
McPeters et al. (2007) McPeters et al. (2007) McPeters et al. (2007) 
Tropopause Calculation Based on temperature profile from ECMWF analysis
(WMO thermal definitiona
Based on IASI temperature from Eumetsat Level-2 products
(WMO thermal definitiona
No use of tropopause height estimation No use of tropopause height estimation 
Vertical range Surface to tropopause Surface to tropopause surface to 6 km
6 to 12 km 
surface to 3 km 
Cloud filter 20% 13% 15% 30% 
Pressure level of peak of vertical sensitivity 500–400 hPa ~ 500 hPa 700–540 hPa 800–700 hPa 
Reference Barret et al. (2011) Boynard et al. (2016, 2017), Hurtmans et al. (2012) Dufour et al. (2012) Cuesta et al. (2013) 

a RTM: Radiative Transfer Model; OEM: optimal estimation method; TP: Tikhonov-Philips; Obs.: Observations; 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).

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