Characterization of Tropospheric Emission Spectrometer (TES) CO&amp;lt;sub&amp;gt;2&amp;lt;/sub&amp;gt; for carbon cycle science

Kulawik, S. S.; Jones, Dylan B. A.; Nassar, Ray; Irion, F. W.; Worden, J.; Bowman, K. W.; Machida, Toshinobu; Matsueda, Hidekazu; Sawa, Yousuke; Biraud, S.; Fischer, M. L.; Jacobson, A. R.

doi:10.5194/acp-10-5601-2010

Cited by 112 publications

(102 citation statements)

References 61 publications

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“…For these reasons, CO 2 and H 2 O are simultaneously retrieved with OCS but are tightly constrained. The a priori profiles for CO 2 and H 2 O are estimated from previous retrieval steps, using their absorption bands that are also measured by TES (Kulawik et al, 2010;Worden et al, 2004). The constraint matrices for CO 2 and H 2 O are based on the covariance from their previous estimates.…”

Section: Retrieval Methodologymentioning

confidence: 99%

Characterization of Aura TES carbonyl sulfide retrievals over ocean

et al. 2014

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Abstract. We present a description of the NASA Aura Tropospheric Emission Spectrometer (TES) carbonyl sulfide (OCS) retrieval algorithm for oceanic observations, along with evaluation of the biases and uncertainties using aircraft profiles from the HIPPO (HIAPER Pole-to-Pole Observations) campaign and data from the NOAA Mauna Loa site. In general, the OCS retrievals (1) have less than 1.0 degree of freedom for signals (DOFs), (2) are sensitive in the mid-troposphere with a peak sensitivity typically between 300 and 500 hPa, (3) but have much smaller systematic errors from temperature, CO 2 and H 2 O calibrations relative to random errors from measurement noise. We estimate the monthly means from TES measurements averaged over multiple years so that random errors are reduced and useful information about OCS seasonal and latitudinal variability can be derived. With this averaging, TES OCS data are found to be consistent (within the calculated uncertainties) with NOAA ground observations and HIPPO aircraft measurements. TES OCS data also captures the seasonal and latitudinal variations observed by these in situ data.

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Section: Retrieval Methodologymentioning

confidence: 99%

Characterization of Aura TES carbonyl sulfide retrievals over ocean

et al. 2014

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“…The Atmospheric Infrared Sounder (AIRS) has achieved more accurate observations of middle-and upper-tropospheric CO 2 concentrations (Crevoisier et al, 2004;Chahine et al, 2005;Maddy et al, 2008;Strow and Hannon, 2008). The Tropospheric Emission Spectrometer (TES) has observed CO 2 concentrations in several vertical layers with high accuracy by taking advantage of its high wavelength resolution (Kulawik et al, 2010(Kulawik et al, , 2013. The Infrared Atmospheric Sounding Interferometer (IASI) has observed upper-atmospheric CO 2 amounts from its TIR spectra (Crevoisier et al, 2009).…”

Section: N Saitoh Et Al: Validation Of Tanso-fts Tir V1 Utls Co 2 Pmentioning

confidence: 99%

Algorithm update of the GOSAT/TANSO-FTS thermal infrared CO2 product (version 1) and validation of the UTLS CO2 data using CONTRAIL measurements

et al. 2016

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Abstract. The Thermal and Near Infrared Sensor for Carbon Observation (TANSO)-Fourier Transform Spectrometer (FTS) on board the Greenhouse Gases Observing Satellite (GOSAT) has been observing carbon dioxide (CO 2 ) concentrations in several atmospheric layers in the thermal infrared (TIR) band since its launch. This study compared TANSO-FTS TIR version 1 (V1) CO 2 data and CO 2 data obtained in the Comprehensive Observation Network for TRace gases by AIrLiner (CONTRAIL) project in the upper troposphere and lower stratosphere (UTLS), where the TIR band of TANSO-FTS is most sensitive to CO 2 concentrations, to validate the quality of the TIR V1 UTLS CO 2 data from 287 to 162 hPa. We first evaluated the impact of considering TIR CO 2 averaging kernel functions on CO 2 concentrations using CO 2 profile data obtained by the CONTRAIL Continuous CO 2 Measuring Equipment (CME), and found that the impact at around the CME level flight altitudes (∼ 11 km) was on average less than 0.5 ppm at low latitudes and less than 1 ppm at middle and high latitudes. From a comparison made during flights between Tokyo and Sydney, the averages of the TIR upper-atmospheric CO 2 data were within 0.1 % of the averages of the CONTRAIL CME CO 2 data with and without TIR CO 2 averaging kernels for all seasons in the Southern Hemisphere. The results of comparisons for all of the eight airline routes showed that the agreements of TIR and CME CO 2 data were worse in spring and summer than in fall and winter in the Northern Hemisphere in the upper troposphere. While the differences between TIR and CME CO 2 data were on average within 1 ppm in fall and winter, TIR CO 2 data had a negative bias up to 2.4 ppm against CME CO 2 data with TIR CO 2 averaging kernels at the northern low and middle latitudes in spring and summer. The negative bias at the northern middle latitudes resulted in the maximum of TIR CO 2 concentrations being lower than that of CME CO 2 concentrations, which led to an underestimate of the amplitude of CO 2 seasonal variation.

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“…Work performed from high spectral measurements in the thermal infrared (TIR), such as AIRS (Crevoisier et al, 2003;Engelen and Stephens, 2004;Divakarla et al, 2006;Chahine et al, 2008;Maddy et al, 2008;Xiong et al, 2008), TES (Shepard et al, 2008;Kulawik et al, 2010;Worden et al, 2012) and IASI (Crevoisier et al, 2009;Herbin et al, 2009;Razavi et al;, has demonstrated the sensitivity of these observations to the midtroposphere. Moreover, the OCO's pre-launch studies (Connor et al, 2008;Butz et al, 2009) as well as those from the shortwave infrared (SWIR) instrument SCIAMACHY Noël et al, 2005) have illustrated the ability of such measurements to get information on gaseous concentrations near the surface.…”

Section: Introductionmentioning

confidence: 99%

Multispectral information from TANSO-FTS instrument – Part 1: Application to greenhouse gases (CO2 and CH4) in clear sky conditions

2013

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Abstract. The Greenhouse gases Observing SATellite (GOSAT) mission, and in particular the Thermal And Near infrared Sensor for carbon Observations-Fourier Transform Spectrometer (TANSO-FTS) instrument, has the advantage of being able to measure simultaneously the same field of view in different spectral ranges with a high spectral resolution. These features allow studying the benefits of using multispectral measurements to improve the CO 2 and CH 4 retrievals.In order to quantify the impact of the spectral synergy on the retrieval accuracy, we performed an information content (IC) analysis from simulated spectra corresponding to the three infrared bands of TANSO-FTS. The advantages and limitations of using thermal and shortwave infrared simultaneously are discussed according to surface type and state vector composition. The IC is then used to determine the most informative spectral channels for the simultaneous retrieval of CO 2 and CH 4 . The results show that a channel selection spanning the three infrared bands can improve the computation time and retrieval accuracy. Therefore, a selection of less than 700 channels from the thermal infrared (TIR) and shortwave infrared (SWIR) bands allows retrieving CO 2 and CH 4 simultaneously with a similar accuracy to using all channels together to retrieve each gas separately.

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Characterization of Tropospheric Emission Spectrometer (TES) CO<sub>2</sub> for carbon cycle science

Cited by 112 publications

References 61 publications

Characterization of Aura TES carbonyl sulfide retrievals over ocean

Characterization of Aura TES carbonyl sulfide retrievals over ocean

Algorithm update of the GOSAT/TANSO-FTS thermal infrared CO<sub>2</sub> product (version 1) and validation of the UTLS CO<sub>2</sub> data using CONTRAIL measurements

Multispectral information from TANSO-FTS instrument – Part 1: Application to greenhouse gases (CO<sub>2</sub> and CH<sub>4</sub>) in clear sky conditions

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Characterization of Tropospheric Emission Spectrometer (TES) CO&lt;sub&gt;2&lt;/sub&gt; for carbon cycle science

Cited by 112 publications

References 61 publications

Characterization of Aura TES carbonyl sulfide retrievals over ocean

Characterization of Aura TES carbonyl sulfide retrievals over ocean

Algorithm update of the GOSAT/TANSO-FTS thermal infrared CO&lt;sub&gt;2&lt;/sub&gt; product (version 1) and validation of the UTLS CO&lt;sub&gt;2&lt;/sub&gt; data using CONTRAIL measurements

Multispectral information from TANSO-FTS instrument – Part 1: Application to greenhouse gases (CO&lt;sub&gt;2&lt;/sub&gt; and CH&lt;sub&gt;4&lt;/sub&gt;) in clear sky conditions

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Characterization of Tropospheric Emission Spectrometer (TES) CO<sub>2</sub> for carbon cycle science

Algorithm update of the GOSAT/TANSO-FTS thermal infrared CO<sub>2</sub> product (version 1) and validation of the UTLS CO<sub>2</sub> data using CONTRAIL measurements

Multispectral information from TANSO-FTS instrument – Part 1: Application to greenhouse gases (CO<sub>2</sub> and CH<sub>4</sub>) in clear sky conditions