IASI on Metop-A: Operational Level 2 retrievals after five years in orbit

August, Thomas; Klaes, Dieter; Schlüssel, Peter; Hultberg, Tim; Crapeau, Marc; Arriaga, A.; O’Carroll, Anne; Coppens, Dorothée; Munro, Rose; Calbet, Xavier

doi:10.1016/j.jqsrt.2012.02.028

Cited by 174 publications

(160 citation statements)

References 72 publications

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“…7 for all three FTIR measurement sites and three different altitudes. The altitudes are selected according to the comparability estima- The good agreement observed here is consistent with previous studies that compared IASI H 2 O profile products to meteorological radiosonde data (Pougatchev et al, 2009;Schneider and Hase, 2011a;August et al, 2012). …”

Section: H 2 O Profiles (Product Type 1)supporting

confidence: 84%

“…The good agreement observed here is in consistency with previous studies that compared IASI H 2 O profile products to meteorological radiosonde data (Pougatchev et al, 2009;Schneider and Hase, 2011a;August et al, 2012). The solid lines in the right panel of Figure 6 depicts the comparability values diag(S c )/ diag(S a ) for product type 2, i. e., S c is calculated according to Eq.…”

supporting

confidence: 90%

“…IASI is an infrared Michelson interferometer and covers the spectral range from 645 to 2762 cm −1 (3.62 to 15.5 µm). More instrument details can be found at Clerbaux et al (2009) and August et al (2012) (Rothman et al, 2009(Rothman et al, , with 2009. We also fit the surface temperature and the atmospheric temperature, whereby the a priori temperatures are the EUMETSAT level 2 temperatures.…”

Section: The Musica Metop/iasi Retrievalsmentioning

confidence: 99%

“…In agreement with August et al (2012), we assume a temperature uncertainty of 2 K for surface temperature and the temperature in the lowermost tropopause (0-2 km) and of 1 K above, whereby we suppose that the uncertainties at ground level and at different atmospheric layers are uncorrelated.…”

mentioning

confidence: 99%

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The MUSICA MetOp/IASI H<sub>2</sub>O and δD products: characterisation and long-term comparison to NDACC/FTIR data

et al. 2014

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Abstract. Within the project MUSICA (MUlti-platform remote Sensing of Isotopologues for investigating the Cycle of Atmospheric water) ground-and space-based remote sensing as well as in situ data sets of tropospheric water vapour isotopologues are provided. The space-based remote-sensing data set is produced from spectra measured by the IASI (Infrared Atmospheric Sounding Interferometer) sensor and is potentially available on a global scale.Here, we present the MUSICA IASI data for three different geophysical locations (subtropics, midlatitudes, and Arctic), and we provide a comprehensive characterisation of the complex nature of such space-based isotopologue remotesensing products. The quality assessment study is complemented by a comparison to MUSICA's ground-based FTIR (Fourier Transform InfraRed) remote-sensing data retrieved from the spectra recorded at three different locations within the framework of NDACC (Network for the Detection of Atmospheric Composition Change).We confirm that IASI is able to measure tropospheric H 2 O profiles with a vertical resolution of about 4 km and a random error of about 10 %. In addition IASI can observe middle tropospheric δD that adds complementary value to IASI's middle tropospheric H 2 O observations. Our study presents theoretical and empirical proof that IASI has the capability for a global observation of middle tropospheric water vapour isotopologues on a daily timescale and at a quality that is sufficiently high for water cycle research purposes.

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Section: H 2 O Profiles (Product Type 1)supporting

confidence: 84%

supporting

confidence: 90%

Section: The Musica Metop/iasi Retrievalsmentioning

confidence: 99%

mentioning

confidence: 99%

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The MUSICA MetOp/IASI H<sub>2</sub>O and δD products: characterisation and long-term comparison to NDACC/FTIR data

et al. 2014

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“…FORLI-O3 inputs include the following: (i) the spectral radiances extracted from IASI L1C data; (ii) cloud cover, temperature and humidity profiles selected from IASI L2 records, and provided by the European Organisation for the Exploitation of Meteorological Satellites (Eumetsat) (e.g. August et al, 2012). Version 20100815 of FORLI was used for this study.…”

Section: Satellite Observationsmentioning

confidence: 99%

Intercomparison of polar ozone profiles by IASI/MetOp sounder with 2010 Concordiasi ozonesonde observations

et al. 2013

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Validation of ozone profiles measured from a nadir looking satellite instrument over Antarctica is a challenging task due to differences in their vertical sensitivity with ozonesonde measurements. In this paper, ozone observations provided by the Infrared Atmospheric Sounding Interferometer (IASI) instrument onboard the polar-orbiting satellite MetOp are compared with ozone profiles collected between August and October 2010 at McMurdo Station, Antarctica, during the Concordiasi measurement campaign. The main objective of the campaign was the satellite data validation. With this aim 20 zero-pressure sounding balloons carrying ozonesondes were launched during this period when the MetOp satellite was passing above McMurdo. This makes the dataset relevant for comparison, especially because the balloons covered the entire altitude range of IASI profiles. The validation methodology and the collocation criteria vary according to the availability of global positioning system auxiliary data with each electro-chemical cell ozonesonde observation. The relative mean difference is shown to depend on the vertical range investigated. The analysis shows a good agreement in the troposphere (below 10 km) and middle stratosphere (25–40 km), where the differences are lower than 10%. However a significant positive bias of about 10–26% is estimated in the lower stratosphere at 10–25 km, depending on altitude. The positive bias in the 10–25 km range is consistent with previously reported studies comparing in situ data with thermal infrared satellite measurements. This study allows for a better characterization of IASI-retrieved ozone over the polar region during ozone depletion/recovery processes

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IASI observations of sulfur dioxide (SO₂) in the boundary layer of Norilsk

et al. 2014

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Norilsk is one of the most polluted cities in the world, largely because of intense mining of heavy metals. Here we present satellite observations of SO2 in a large area surrounding the city, derived from 4 years of measurements from the Infrared Atmospheric Sounding Interferometer (IASI), the nadir thermal infrared (TIR) sounder onboard the MetOp platforms. TIR instruments are conventionally considered to be inadequate for monitoring near‐surface composition, because their sensitivity to the lowest part of the atmosphere is limited by the thermal contrast between the ground and the air above it. We demonstrate that IASI is capable of measuring SO2 (here as a partial column from 0 to 2 km) in Norilsk, thanks to the large temperature inversions and the low humidity in wintertime. We discuss the influence of thermal contrast and of surface humidity on the SO2 retrieved columns and estimate the retrieval errors. Using a simple box model, we derive the yearly total emissions of SO2 from Norilsk and compare them to previously reported values. More generally, we present in this work the first large‐scale demonstration of the capability of space‐based TIR sounders to measure near‐surface SO2 anthropogenic pollution.

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IASI on Metop-A: Operational Level 2 retrievals after five years in orbit

Cited by 174 publications

References 72 publications

The MUSICA MetOp/IASI H<sub>2</sub>O and δD products: characterisation and long-term comparison to NDACC/FTIR data

The MUSICA MetOp/IASI H<sub>2</sub>O and δD products: characterisation and long-term comparison to NDACC/FTIR data

Intercomparison of polar ozone profiles by IASI/MetOp sounder with 2010 Concordiasi ozonesonde observations

IASI observations of sulfur dioxide (SO₂) in the boundary layer of Norilsk

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IASI on Metop-A: Operational Level 2 retrievals after five years in orbit

Cited by 174 publications

References 72 publications

The MUSICA MetOp/IASI H&lt;sub&gt;2&lt;/sub&gt;O and δD products: characterisation and long-term comparison to NDACC/FTIR data

The MUSICA MetOp/IASI H&lt;sub&gt;2&lt;/sub&gt;O and δD products: characterisation and long-term comparison to NDACC/FTIR data

Intercomparison of polar ozone profiles by IASI/MetOp sounder with 2010 Concordiasi ozonesonde observations

IASI observations of sulfur dioxide (SO2) in the boundary layer of Norilsk

Contact Info

Product

Resources

About

The MUSICA MetOp/IASI H<sub>2</sub>O and δD products: characterisation and long-term comparison to NDACC/FTIR data

The MUSICA MetOp/IASI H<sub>2</sub>O and δD products: characterisation and long-term comparison to NDACC/FTIR data

IASI observations of sulfur dioxide (SO₂) in the boundary layer of Norilsk