0000000000414166

AUTHOR

Marko Laine

showing 3 related works from this author

Markov Chain Monte Carlo Methods for High Dimensional Inversion in Remote Sensing

2004

SummaryWe discuss the inversion of the gas profiles (ozone, NO3, NO2, aerosols and neutral density) in the upper atmosphere from the spectral occultation measurements. The data are produced by the ‘Global ozone monitoring of occultation of stars’ instrument on board the Envisat satellite that was launched in March 2002. The instrument measures the attenuation of light spectra at various horizontal paths from about 100 km down to 10–20 km. The new feature is that these data allow the inversion of the gas concentration height profiles. A short introduction is given to the present operational data management procedure with examples of the first real data inversion. Several solution options for…

Statistics and Probability010504 meteorology & atmospheric sciencesAttenuationInversion (meteorology)Markov chain Monte CarloDensity estimationInverse problem01 natural sciencesOccultation010104 statistics & probabilitysymbols.namesakeMetropolis–Hastings algorithmStatisticsPrior probabilitysymbols0101 mathematicsStatistics Probability and UncertaintyAlgorithm0105 earth and related environmental sciencesMathematicsJournal of the Royal Statistical Society Series B: Statistical Methodology
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Analysing time-varying trends in stratospheric ozone time series using the state space approach

2014

Abstract. We describe a hierarchical statistical state space model for ozone profile time series. The time series are from satellite measurements by the Stratospheric Aerosol and Gas Experiment (SAGE) II and the Global Ozone Monitoring by Occultation of Stars (GOMOS) instruments spanning the years 1984–2011. Vertical ozone profiles were linearly interpolated on an altitude grid with 1 km resolution covering 20–60 km. Monthly averages were calculated for each altitude level and 10° wide latitude bins between 60° S and 60° N. In the analysis, mean densities are studied separately for the 25–35, 35–45, and 45–55 km layers. Model variables include the ozone mean level, local trend, seasonal osc…

Atmospheric ScienceStratospheric Aerosol and Gas ExperimentEquatorNorthern HemisphereGlobal Ozone Monitoring by Occultation of StarsAtmospheric scienceslcsh:QC1-999Latitudelcsh:ChemistryAltitudelcsh:QD1-999ClimatologyOzone layerEnvironmental scienceSouthern Hemispherelcsh:PhysicsAtmospheric Chemistry and Physics
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Retrieval of atmospheric CH4profiles from Fourier transform infrared data using dimension reduction and MCMC

2016

We introduce an inversion method that uses dimension reduction for the retrieval of atmospheric methane (CH4) profiles. Uncertainty analysis is performed using the Markov chain Monte Carlo (MCMC) statistical estimation. These techniques are used to retrieve CH4 profiles from the ground-based spectral measurements by the Fourier Transform Spectrometer (FTS) instrument at Sodankyla (67.4 degrees N, 26.6 degrees E), Northern Finland. The Sodankyla FTS is part of the Total Carbon Column Observing Network (TCCON), a global network that observes solar spectra in near-infrared wavelengths. The high spectral resolution of the data provides approximately 3 degrees of freedom about the vertical struc…

Atmospheric Science010504 meteorology & atmospheric sciencesComputer scienceDegrees of freedom (statistics)Inverse transform samplingMarkov chain Monte CarloInverse problem01 natural sciences010104 statistics & probabilitysymbols.namesakeGeophysicsFourier transformSpace and Planetary SciencePrincipal component analysisEarth and Planetary Sciences (miscellaneous)symbols0101 mathematicsTotal Carbon Column Observing NetworkUncertainty analysis0105 earth and related environmental sciencesRemote sensingJournal of Geophysical Research: Atmospheres
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