Modelling of atmospheric mid-infrared radiative transfer: the AMIL2DA algorithm intercomparison experiment

Clarmann, T. von; Höpfner, Michael; Funke, B.; López‐Puertas, M.; Dudhia, A.; Jay, Victoria; Schreier, Franz; Ridolfi, Marco; Ceccherini, Simone; Kerridge, B. J.; Reburn, J.; Siddans, Richard

doi:10.1016/s0022-4073(02)00262-5

Cited by 55 publications

(56 citation statements)

References 39 publications

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“…RET2D) or correct pointing-related errors by adjusting the pressure profile to the actual limb measurement. The RCP supports direct retrieval of the elevation pointing in terms of tangent altitudes while it adjusts pressure assuming the hydrostatical equilibrium, and is thus well suited for monitoring of elevation pointing peculiarities (von Clarmann et al, 2003b, Kiefer et al, 2007.…”

Section: Scientific Codes For Data Processingmentioning

confidence: 99%

“…In the prelaunch phase of ENVISAT six codes were developed and cross-validated within the "Advances MIPAS Level-2 Data Analysis" (AMIL2DA) project (von Clarmann et al, 2003c).…”

Section: Scientific Codes For Data Processingmentioning

confidence: 99%

“…While the ORM retrieves atmospheric temperatures and mixing ratios of constituents on an altitude grid defined by the tangent altitudes of the actual limb scan (Ridolfi et al, 2000), other algorithms use a fixed altitude grid, which in case of the RCP is much finer than the MIPAS tangent altitude spacing (1 km vs. 3 km) (von Clarmann, 2003b). Most of the processors either rely on the engineering information on the MIPAS elevation pointing (e.g.…”

Section: Scientific Codes For Data Processingmentioning

confidence: 99%

“…Since, however, the vibrational temperatures of the actual atmosphere are typically unknown, Non-LTE is not only a forward modelling issue but also poses retrievalrelated problems (von Clarmann et al, 2003b). At least, the vibrational temperatures should be modelled for the actual atmosphere.…”

Section: Scientific Codes For Data Processingmentioning

confidence: 99%

“…The data processing software has been evaluated by intercomparisons of data processors of different institutions at an international level (von Clarmann et al, 2003c) and by applying it to measurements as performed by similar instrumentation (e.g. MIPAS balloon experiment).…”

Section: General Commentsmentioning

confidence: 99%

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MIPAS: an instrument for atmospheric and climate research

Fischer¹,

Birk

Blom³

et al. 2008

Atmos. Chem. Phys.

692

625

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Abstract. MIPAS, the Michelson Interferometer for Passive Atmospheric Sounding, is a mid-infrared emission spectrometer which is part of the core payload of ENVISAT. It is a limb sounder, i.e. it scans across the horizon detecting atmospheric spectral radiances which are inverted to vertical temperature, trace species and cloud distributions. These data can be used for scientific investigations in various research fields including dynamics and chemistry in the altitude region between upper troposphere and lower thermosphere.The instrument is a well calibrated and characterized Fourier transform spectrometer which is able to detect many trace constituents simultaneously. The different concepts of retrieval methods are described including multi-target and two-dimensional retrievals. Operationally generated data sets consist of temperature, H 2 O, O 3 , CH 4 , N 2 O, HNO 3 , and NO 2 profiles. Measurement errors are investigated in detail and random and systematic errors are specified. The results are validated by independent instrumentation which has been operated at ground stations or aboard balloon gondolas and aircraft. Intercomparisons of MIPAS measurements with other satellite data have been carried out, too. As a result, itCorrespondence to: H. Fischer (herbert.fischer@imk.fzk.de) has been proven that the MIPAS data are of good quality.MIPAS can be operated in different measurement modes in order to optimize the scientific output. Due to the wealth of information in the MIPAS spectra, many scientific results have already been published. They include intercomparisons of temperature distributions with ECMWF data, the derivation of the whole NO y family, the study of atmospheric processes during the Antarctic vortex split in September 2002, the determination of properties of Polar Stratospheric Clouds, the downward transport of NO x in the middle atmosphere, the stratosphere-troposphere exchange, the influence of solar variability on the middle atmosphere, and the observation of Non-LTE effects in the mesosphere.

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Section: Scientific Codes For Data Processingmentioning

confidence: 99%

“…In the prelaunch phase of ENVISAT six codes were developed and cross-validated within the "Advances MIPAS Level-2 Data Analysis" (AMIL2DA) project (von Clarmann et al, 2003c).…”

Section: Scientific Codes For Data Processingmentioning

confidence: 99%

Section: Scientific Codes For Data Processingmentioning

confidence: 99%

Section: Scientific Codes For Data Processingmentioning

confidence: 99%

Section: General Commentsmentioning

confidence: 99%

See 3 more Smart Citations

MIPAS: an instrument for atmospheric and climate research

Fischer¹,

Birk

Blom³

et al. 2008

Atmos. Chem. Phys.

692

625

View full text Add to dashboard Cite

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Electron-acoustic solitons in plasma with nonthermal electrons

Pakzad

Tribeche

2010

Astrophys Space Sci

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Nonlinear electron-acoustic solitary waves (EASWs) are studied using Sagdeev's pseudo-potential technique in a collisionless unmagnetized plasma consisting of a cold electron fluid, nonthermal hot electrons and stationary ions. It is shown that the presence of fast nonthermal electrons may modify the parametric region where electron-acoustic solitons may exist. Our investigation is of wide relevance to astronomers and space scientists working on interstellar space plasmas.

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Electron acoustic double layers in a plasma with a q-nonextensive electron velocity distribution

Pakzad

Tribeche

2011

Astrophys Space Sci

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Electron-acoustic double-layers (EA-DLs) are addressed in a plasma with a q-nonextensive electron velocity distribution. The domain of their allowable Mach numbers depends drastically on the plasma parameters and, in particular, on the electron nonextensivity. As the electrons evolve far away from their thermodynamic equilibrium, the negative EA-DLs shrinks and may develop into compressive EA-DLs. Our results may be relevant to the double-layers observed both in the auroral region and the plasma sheet of Earth's magnetosphere (during enhanced magnetic activity). These DLs associated parallel electric fields are thought to be responsible for particle (electrons and ions) acceleration. Furthermore, our theoretical analysis brings a possibility to develop more refined theories of nonlinear cosmic DLs that may occur in astrophysical plasmas.

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Modelling of atmospheric mid-infrared radiative transfer: the AMIL2DA algorithm intercomparison experiment

Cited by 55 publications

References 39 publications

MIPAS: an instrument for atmospheric and climate research

MIPAS: an instrument for atmospheric and climate research

Electron-acoustic solitons in plasma with nonthermal electrons

Electron acoustic double layers in a plasma with a q-nonextensive electron velocity distribution

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