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Dive into the research topics where A. Laeng is active.

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Featured researches published by A. Laeng.


Atmospheric Measurement Techniques | 2015

Relative drifts and biases between six ozone limb satellite measurements from the last decade

Nabiz Rahpoe; M. Weber; A. Rozanov; K. Weigel; Heinrich Bovensmann; J. P. Burrows; A. Laeng; G. P. Stiller; T. von Clarmann; E. Kyrölä; V. F. Sofieva; J. Tamminen; Kaley A. Walker; D. A. Degenstein; Robert J. Hargreaves; Peter F. Bernath; Joachim Urban; Donal P. Murtagh

Abstract. As part of European Space Agencys (ESA) climate change initiative, high vertical resolution ozone profiles from three instruments all aboard ESAs Envisat (GOMOS, MIPAS, SCIAMACHY) and ESAs third party missions (OSIRIS, SMR, ACE-FTS) are to be combined in order to create an essential climate variable data record for the last decade. A prerequisite before combining data is the examination of differences and drifts between the data sets. In this paper, we present a detailed analysis of ozone profile differences based on pairwise collocated measurements, including the evolution of the differences with time. Such a diagnosis is helpful to identify strengths and weaknesses of each data set that may vary in time and introduce uncertainties in long-term trend estimates. The analysis reveals that the relative drift between the sensors is not statistically significant for most pairs of instruments. The relative drift values can be used to estimate the added uncertainty in physical trends. The added drift uncertainty is estimated at about 3 % decade−1 (1σ). Larger differences and variability in the differences are found in the lowermost stratosphere (below 20 km) and in the mesosphere.


Remote Sensing of Environment | 2015

The Greenhouse Gas Climate Change Initiative (GHG-CCI): Comparison and quality assessment of near-surface-sensitive satellite-derived CO2 and CH4 global data sets

Michael Buchwitz; Markus Reuter; O. Schneising; Hartmut Boesch; Sandrine Guerlet; Bart Dils; I. Aben; R. Armante; P. Bergamaschi; Thomas Blumenstock; Heinrich Bovensmann; D. Brunner; Brigitte Buchmann; J. P. Burrows; A. Butz; Alain Chédin; F. Chevallier; Cyril Crevoisier; Nicholas M Deutscher; Christian Frankenberg; Frank Hase; Otto P. Hasekamp; J. Heymann; Thomas Kaminski; A. Laeng; Günter Lichtenberg; M. De Mazière; Stefan Noel; Justus Notholt; J. Orphal


Earth System Science Data | 2013

Harmonized dataset of ozone profiles from satellite limb and occultation measurements

V. F. Sofieva; Nabiz Rahpoe; J. Tamminen; E. Kyrölä; N. Kalakoski; M. Weber; A. Rozanov; C. von Savigny; A. Laeng; T. von Clarmann; G. P. Stiller; Stefan Lossow; D. A. Degenstein; C. Adams; Chris Roth; N. D. Lloyd; Peter F. Bernath; Robert J. Hargreaves; Jakub Urban; Donal P. Murtagh; Alain Hauchecorne; Francis Dalaudier; M. Van Roozendael; N. Kalb; Claus Zehner


Atmospheric Measurement Techniques | 2015

Validation of MIPAS IMK/IAA methane profiles

A. Laeng; Johannes Plieninger; T. von Clarmann; U. Grabowski; G. P. Stiller; E. Eckert; N. Glatthor; F. Haenel; S. Kellmann; M. Kiefer; A. Linden; Stefan Lossow; L. Deaver; Andreas Engel; Mark E. Hervig; Ingeborg Levin; Martin J. McHugh; Stefan Noel; G. C. Toon; Kaley A. Walker


Atmospheric Chemistry and Physics | 2017

An update on ozone profile trends for the period 2000 to 2016

Wolfgang Steinbrecht; L. Froidevaux; R. Fuller; Ray Wang; J. Anderson; Chris Roth; Doug A. Degenstein; Robert Damadeo; Joe Zawodny; S. M. Frith; Richard D. McPeters; Pawan K. Bhartia; Jeannette D. Wild; Craig S. Long; Sean M. Davis; Karen H. Rosenlof; V. F. Sofieva; Kaley A. Walker; Nabiz Rahpoe; A. Rozanov; M. Weber; A. Laeng; Thomas von Clarmann; Gabriele P. Stiller; Natalya Kramarova; Sophie Godin-Beekmann; Thierry Leblanc; Richard Querel; D. P. J. Swart; Ian Boyd


Atmospheric Measurement Techniques | 2014

Validation of MIPAS IMK/IAA V5R_O3_224 ozone profiles

A. Laeng; U. Grabowski; T. von Clarmann; G. P. Stiller; N. Glatthor; M. Höpfner; S. Kellmann; M. Kiefer; A. Linden; Stefan Lossow; V. F. Sofieva; Irina Petropavlovskikh; Daan Hubert; T. Bathgate; Peter F. Bernath; C. D. Boone; Cathy Clerbaux; P.-F. Coheur; Robert Damadeo; D. A. Degenstein; S. M. Frith; L. Froidevaux; John C. Gille; K. W. Hoppel; Martin J. McHugh; Yasuko Kasai; Jerry Lumpe; Nabiz Rahpoe; G. C. Toon; Takuki Sano


Atmospheric Chemistry and Physics | 2016

Global HCFC-22 measurements with MIPAS: retrieval, validation, global distribution and its evolution over 2005–2012

M. Chirkov; G. P. Stiller; A. Laeng; S. Kellmann; T. von Clarmann; C. D. Boone; J. W. Elkins; Andreas Engel; N. Glatthor; U. Grabowski; Christina M. Harth; M. Kiefer; Felicia Kolonjari; P. B. Krummel; A. Linden; C. Lunder; Benjamin R. Miller; Stephen A. Montzka; Jens Mühle; Simon O'Doherty; J. Orphal; Ronald G. Prinn; G. C. Toon; Martin K. Vollmer; Kaley A. Walker; Ray F. Weiss; Andreas Wiegele; Dickon Young


Remote Sensing of Environment | 2015

The ozone climate change initiative: Comparison of four Level-2 processors for the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS)

A. Laeng; Daan Hubert; T. Verhoelst; T. von Clarmann; B. M. Dinelli; A. Dudhia; Piera Raspollini; G. P. Stiller; U. Grabowski; Arno Keppens; M. Kiefer; V. F. Sofieva; L. Froidevaux; Kaley A. Walker; J.-C. Lambert; Claus Zehner


Atmospheric Measurement Techniques | 2015

Methane and nitrous oxide retrievals from MIPAS-ENVISAT

Johannes Plieninger; T. von Clarmann; G. P. Stiller; U. Grabowski; N. Glatthor; S. Kellmann; A. Linden; F. Haenel; M. Kiefer; M. Höpfner; A. Laeng; Stefan Lossow


Atmospheric Chemistry and Physics | 2017

Merged SAGE II, Ozone_cci and OMPS ozone profile dataset and evaluation of ozone trends in the stratosphere

V. F. Sofieva; E. Kyrölä; Marko Laine; J. Tamminen; Doug A. Degenstein; Chris Roth; Daniel Zawada; M. Weber; A. Rozanov; Nabiz Rahpoe; Gabriele P. Stiller; A. Laeng; Thomas von Clarmann; Kaley A. Walker; Patrick E. Sheese; Daan Hubert; Michel Van Roozendael; Claus Zehner; Robert Damadeo; Joseph M. Zawodny; Natalya Kramarova; Pawan K. Bhartia

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V. F. Sofieva

Finnish Meteorological Institute

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G. P. Stiller

Karlsruhe Institute of Technology

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N. Glatthor

Karlsruhe Institute of Technology

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T. von Clarmann

Karlsruhe Institute of Technology

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U. Grabowski

Karlsruhe Institute of Technology

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A. Linden

Karlsruhe Institute of Technology

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S. Kellmann

Karlsruhe Institute of Technology

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Thomas von Clarmann

Karlsruhe Institute of Technology

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