Smoothing error pitfalls Atmospheric Measurement Techniques DOI 10.5194/amt-7-3023-2014 18 September 2014 The difference due to the content of a priori information between a constrained retrieval and the true atmospheric state is usually represented by a diagnostic quantity called smoothing error. In this paper it is shown that the concept of the smoothing error as a component of the retrieval error budget is questionable because it is not compliant with Gaussian error propagation. Read more
EARLINET: towards an advanced sustainable European aerosol lidar network Atmospheric Measurement Techniques DOI 10.5194/amt-7-2389-2014 8 August 2014 This paper gives an overview of the European Aerosol Research Lidar Network (EARLINET) main developments since 2000 and introduces the dedicated EARLINET special issue, which reports on the technical solutions and scientific results related to the use of advanced lidar remote sensing techniques for the study of aerosol properties. EARLINET: towards an advanced sustainable European aerosol lidar network">Read more
Past changes in the vertical distribution of ozone – Part 1: Measurement techniques, uncertainties and availability Atmospheric Measurement Techniques DOI 10.5194/amt-7-1395-2014 21 May 2014 This summary presents an overview of stratospheric ozone profile measurement data sets (ground and satellite based) available for ozone recovery studies. Here we document measurement techniques, spatial and temporal coverage, vertical resolution, native units and measurement uncertainties. Read more
Global monitoring of terrestrial chlorophyll fluorescence from moderate-spectral-resolution near-infrared satellite measurements: methodology, simulations, and application to GOME-2 Atmospheric Measurement Techniques DOI 10.5194/amt-6-2803-2013 25 October 2013 Here, we describe a new methodology to retrieve global far-red fluorescence information; we use hyperspectral data with a simplified radiative transfer model to disentangle the spectral signatures of three basic components: atmospheric absorption, surface reflectance, and fluorescence radiance. An empirically based principal component analysis approach is employed, primarily using cloudy data over ocean, to model and solve for the atmospheric absorption. GOME-2">Read more
MODIS 3 km aerosol product: algorithm and global perspective Atmospheric Measurement Techniques DOI 10.5194/amt-6-1829-2013 31 July 2013 After more than a decade of producing a nominal 10 km aerosol product based on the dark target method, the MODerate resolution Imaging Spectroradiometer (MODIS) aerosol team will be releasing a nominal 3 km product as part of their Collection 6 release. MODIS 3 km aerosol product: algorithm and global perspective">Read more
The CM SAF SSM/I-based total column water vapour climate data record: methods and evaluation against re-analyses and satellite Atmospheric Measurement Techniques DOI 10.5194/amt-6-765-2013 19 March 2013 The European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT) Satellite Application Facility on Climate Monitoring (CM SAF) aims at the provision and sound validation of well documented Climate Data Records (CDRs) in sustained and operational environments. In this study, a total column water vapour path climatology from CM SAF is presented and inter-compared to water vapour data records from various data sources. SAF SSM/I-based total column water vapour climate data record: methods and evaluation against re-analyses and satellite">Read more
The effect of hygroscopicity on eddy covariance estimates of sea-spray aerosol fluxes: a comparison of high-rate and bulk correction methods Atmospheric Measurement Techniques DOI 10.5194/amt-6-323-2013 13 February 2013 Here we describe a method of correcting aerosol spectra for relative humidity induced size variations at the high frequency (10 Hz) measurement timescale, where counting statistics are poor and the spectral shape cannot be well represented by a simple power law. Read more
Development of a new data-processing method for SKYNET sky radiometer observations Atmospheric Measurement Techniques DOI 10.5194/amt-5-2723-2012 15 November 2012 In this study, we propose a new data processing method to improve single scattering albedo retrievals for the SKYNET sky radiometer network, which is one of the growing number of networks of sun-sky photometers, such as NASA AERONET and others. SKYNET sky radiometer observations">Read more
First middle-atmospheric zonal wind profile measurements with a new ground-based microwave Doppler-spectro-radiometer Atmospheric Measurement Techniques DOI 10.5194/amt-5-2647-2012 7 November 2012 We report on the wind radiometer WIRA, a new ground-based microwave Doppler-spectro-radiometer specifically designed for the measurement of middle-atmospheric horizontal wind by observing ozone emission spectra at 142.17504 GHz. Read more
Combined wind measurements by two different lidar instruments in the Arctic middle atmosphere Atmospheric Measurement Techniques DOI 10.5194/amt-5-2433-2012 19 October 2012 The comparison of winds derived by RMR and sodium lidar is excellent for long integration times of 10 h as well as shorter ones of 1 h. Combination of data from both lidars allows identifying wavy structures between 30 and 110 km altitude, whose amplitudes increase with height. Read more
