Tropospheric emission spectrometer: retrieval method and error analysis

Bowman, K. W.; Rodgers, C. D.; Kulawik, S. S.; Worden, J.; Sarkissian, E.; Osterman, G. B.; Steck, T.; Lou, Michael; Eldering, A.; Shephard, Mark W.; Worden, H. M.; Lampel, M.; Clough, S. A.; Brown, P.; Rinsland, C. P.; Gunson, M. R.; Beer, R.

doi:10.1109/tgrs.2006.871234

Cited by 314 publications

(343 citation statements)

References 19 publications

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“…66 levels). The retrievals and error estimation, already described by Worden et al (2004), Bowman et al (2002Bowman et al ( , 2006 and Kulawik et al (2006) are based on the optimal estimation approach (Rodgers et al 2000). TES ozone has been evaluated on a regular basis since the start of the mission in 2004, and compared against ozone-sonde measurements.…”

Section: Tropospheric Compositionmentioning

confidence: 99%

Aerosol and ozone changes as forcing for climate evolution between 1850 and 2100

et al. 2012

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Global aerosol and ozone distributions and their associated radiative forcings were simulated between 1850 and 2100 following a recent historical emission dataset and under the representative concentration pathways (RCP) for the future. These simulations were used in an Earth System Model to account for the changes in both radiatively and chemically active compounds, when simulating the climate evolution. The past negative stratospheric ozone trends result in a negative climate forcing culminating at -0.15 W m -2 in the 1990s. In the meantime, the tropospheric ozone burden increase generates a positive climate forcing peaking at 0.41 W m -2 . The future evolution of ozone strongly depends on the RCP scenario considered. In RCP4.5 and RCP6.0, the evolution of both stratospheric and tropospheric ozone generate relatively weak radiative forcing changes until 2060-2070 followed by a relative 30 % decrease in radiative forcing by 2100. In contrast, RCP8.5 and RCP2.6 model projections exhibit strongly different ozone radiative forcing trajectories. In the RCP2.6 scenario, both effects (stratospheric ozone, a negative forcing, and tropospheric ozone, a positive forcing) decline towards 1950s values while they both get stronger in the RCP8.5 scenario. Over the twentieth century, the evolution of the total aerosol burden is characterized by a strong increase after World War II until the middle of the 1980s followed by a stabilization during the last decade due to the strong decrease in sulfates in OECD countries since the 1970s. The cooling effects reach their maximal values in 1980, with -0.34 and -0.28 W m -2 respectively for direct and indirect total radiative forcings. According to the RCP scenarios, the aerosol content, after peaking around 2010, is projected to decline strongly and monotonically during the twenty-first century for the RCP8.5, 4.5 and 2.6 scenarios. While for RCP6.0 the decline occurs later, after peaking around 2050. As a consequence the relative importance of the total cooling effect of aerosols becomes weaker throughout the twenty-first century compared with the positive forcing of greenhouse gases. Nevertheless, both surface ozone and aerosol content show very different regional features depending on the future scenario considered. Hence, in 2050, surface ozone changes vary between -12 and ?12 ppbv over Asia depending on the RCP projection, whereas the regional direct aerosol radiative forcing can locally exceed -3 W m -2 . This paper is a contribution to the special issue on the IPSL and CNRM global climate and Earth System Models, both developed in France and contributing to the 5th coupled model intercomparison project.Electronic supplementary material The online version of this article

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Section: Tropospheric Compositionmentioning

confidence: 99%

Aerosol and ozone changes as forcing for climate evolution between 1850 and 2100

et al. 2012

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“…The data used in this study were measured using the global survey mode, in which the observations are taken every other day with a spacing of about 220 km along the orbit track. Trace gas profiles are retrieved using an optimal estimation approach as described by Bowman et al [2006]. We use version V002 of the data, which are filtered using the mean and root mean square of the radiance residual and on the cloud top pressure of each profile as recommended in the TES L2 Data User's Guide [TES Science Team, 2006].…”

Section: Tes Ozone Datamentioning

confidence: 99%

Impact of the assimilation of ozone from the Tropospheric Emission Spectrometer on surface ozone across North America

Parrington

Jones

Bowman

et al. 2009

Geophysical Research Letters

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We examine the impact of assimilating ozone observations from the Tropospheric Emission Spectrometer (TES) on North American surface ozone abundances in the GEOS‐Chem model in August 2006. The assimilation reduces the negative bias in the modeled free tropospheric ozone, which enhances the ozone flux into the boundary layer. Surface ozone abundances increased by as much as 9 ppb in western North America and by less than 2 ppb in the southeast, resulting in a total background source of ozone of 20–40 ppb. The enhanced ozone in the model reduced the model bias with respect to surface ozone observations in the western USA, but exacerbated it in the east. This increase in the bias in the boundary layer in the east, despite the agreement between the assimilation and ozonesonde measurements in the free troposphere, suggests errors in the ozone sources or sinks or in boundary layer mixing in the model.

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“…TES is also a Fourier transform spectrometer, which measures the thermal emission spectra between 985 and 1075 cm À1 with a spectral resolution of 0.1 cm À1 (apodized) and with a noise equivalent spectral radiance of 17 nW/(cm 2 sr À1 cm À1 ). Here the measurements provide ozone profiles with a vertical resolution of about 9 km [Bowman et al, 2006;Worden et al, 2004]. Furthermore, the three METOP satellites will carry the Fourier transform Infrared Atmospheric Sounder Interferometer (IASI).…”

Section: Introductionmentioning

confidence: 99%

Retrieval of tropospheric ozone: The synergistic use of thermal infrared emission and ultraviolet reflectivity measurements from space

Landgraf¹,

Hasekamp²

2007

J. Geophys. Res.

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[1] We investigate the synergistic use of ultraviolet reflectivity measurements in the spectral range of 290-320 nm and the thermal emission spectra at the 9.6-mm ozone absorption band for the retrieval of vertical distribution of tropospheric ozone from satellite observations. Retrievals of vertical ozone profiles are performed from simulated measurements for different atmospheric conditions. The retrievals show that the use of measurements of both spectral ranges can improve significantly the retrieved ozone in the lowest 5 km of the troposphere. Here largest improvements are found for tropical temperature distributions and for a low thermal contrast in the lower troposphere. So the use of both spectral bands may help to improve the remote sensing of tropospheric ozone from space.Citation: Landgraf, J., and O. P. Hasekamp (2007), Retrieval of tropospheric ozone: The synergistic use of thermal infrared emission and ultraviolet reflectivity measurements from space,

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Tropospheric emission spectrometer: retrieval method and error analysis

Cited by 314 publications

References 19 publications

Aerosol and ozone changes as forcing for climate evolution between 1850 and 2100

Aerosol and ozone changes as forcing for climate evolution between 1850 and 2100

Impact of the assimilation of ozone from the Tropospheric Emission Spectrometer on surface ozone across North America

Retrieval of tropospheric ozone: The synergistic use of thermal infrared emission and ultraviolet reflectivity measurements from space

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