Brewer algorithm sensitivity analysis

Presentación realizada para el: SAUNA workshop celebrado el 8 de noviembre de 2006 en Puerto de la Cruz, Tenerife

INM ozone measurements in the Antarctic region

Presentación realizada para el Sauna Workshop celebrado en Tenerife, España el día 10 de noviembre de 200

Regional Calibration Centers for Dobson and Brewer in Europe : a joint venture for highest quality in monitoring the ozone layer

Póster presentado en: Quadrennial Ozone Symposium 2012 celebrado del 27 al 31 de agosto de 2012 en Toronto, Canad

EuBrewNet – A European Brewer network (COST Action ES1207), an overview

COST Action ES1207, EuBrewNet, was proposed to coordinate Brewer spectrophotometer measurements of ozone, spectral UV and aerosol optical depth (AOD-UV) in the UV within Europe, and unite the ozone, UV and AOD communities, through a formally managed European Brewer Network capable of delivering a consistent, spatially homogeneous European data resource. With emphasis on the ozone measurements, an overview is given of new calibration and instrument characterization procedures, which are then incorporated into new algorithms for the determination of total column ozone taking account of non-linearities and stray light effects within the spectrometer. A new near real time database is described where all raw data are processed centrally and subjected to the same quality control criteria. Data products are produced in levels that reflect the stages of quality control applied from initial near real time to final archive quality for trend analysis. Work is ongoing to complete similar procedures for the UV and AOD-UV data products. Governance of the new network, which has already expanded beyond the boundaries of Europe, will be overseen directly by the WMO Scientific Advisory Groups

Ninth Intercomparison Campaign of the Regional Brewer Calibration Center Europe (RBCC-E): Lichtklimatisches Observatorium, Arosa, Switzerland, 14-26 July 2014

This ninth intercomparison campaign was a joint exercise of the Regional Brewer Calibration Center for Europe (RBCC-E) and the Arosa Lichtklimatisches Observatorium (LKO) of MeteoSwiss during the period 14-26 July 2014. Six Brewers managed by 11 experts from four countries participated in the campaign (Table 1). The Brewer instruments were compared with the RBCC-E travelling reference Brewer #185 for ozone

Observaciones del ozono total en el OAI 1991-2003: estimación de tendencias en la región subtropical

Ponencia presentada en: 1er Encuentro sobre Meteorología y Atmósfera de Canarias, celebrado en el Puerto de la Cruz, los días 12,13 y 14 de noviembre de 2003. El encuentro estuvo organizado por el Centro Meteorológico Territorial en Canarias Occidental, con la colaboración del Observatorio Atmosférico de Izaña y del Grupo de Física de la Atmósfera de la Facultad de Física (Universidad de La Laguna

Eighth Intercomparison Campaign of the Regional Brewer Calibration Center Europe (RBCC-E): El Arenosillo Atmospheric Sounding Station, Huelva, Spain, 10-20 June 2013

The eighth Regional Brewer Calibration Center for Europe (RBCC-E) intercomparison was held at El Arenosillo Atmospheric Sounding Station of the Instituto Nacional de Técnica Aeroespacial (INTA) during the period 10-20 June 2013. This campaign was organized in collaboration with the Area of Instrumentation and Atmospheric Research of INTA, with the support of the Global Atmosphere Watch (GAW) programme of the World Meteorological Organization (WMO) and a CEOS CALVAL project of the European Space Agency (ESA)

Investigating the long-term evolution of subtropical ozone profiles applying ground-based FTIR spectrometry

This study investigates the long-term evolution of subtropical ozone profile time series (1999–2010) obtained from ground-based FTIR (Fourier Transform InfraRed) spectrometry at the Izaña Observatory ozone super-site. Different ozone retrieval strategies are examined, analysing the influence of an additional temperature retrieval and different constraints. The theoretical assessment reveals that the FTIR system is able to resolve four independent ozone layers with a precision of better than 6% in the troposphere and of better than 3% in the lower, middle and upper stratosphere. This total error includes the smoothing error, which dominates the random error budget. Furthermore, we estimate that the measurement noise as well as uncertainties in the applied atmospheric temperature profiles and instrumental line shape are leading error sources. We show that a simultaneous temperature retrieval can significantly reduce the total random errors and that a regular determination of the instrumental line shape is important for producing a consistent long-term dataset. These theoretical precision estimates are empirically confirmed by daily intercomparisons with Electro Chemical Cell (ECC) sonde profiles. In order to empirically document the long-term stability of the FTIR ozone profile data we compare the linear trends and seasonal cycles as obtained from the FTIR and ECC time series. Concerning seasonality, in winter both techniques observe stratospheric ozone profiles that are typical middle latitude profiles (low tropopause, low ozone maximum concentrations) and in summer/autumn profiles that are typical tropical profiles (high tropopause, high maximum concentrations). The linear trends estimated from the FTIR and the ECC datasets agree within their error bars. For the FTIR time series, we observe a significant negative trend in the upper troposphere/lower stratosphere of about −0.2%yr−1 and a significant positive trend in the middle and upper stratosphere of about +0.3%yr−1 and +0.4%yr−1, respectively. Identifying such small trends is a difficult task for any measurement technique. In this context, super-sites applying different techniques are very important for the detection of reliable ozone trends

Thirteenth Intercomparison Campaign of the Regional Brewer Calibration Center Europe: Lichtklimatisches Observatorium, Arosa, Switzerland: 30 July–10 August 2018

Editado por Alberto Redondas y Stoyka NetchevaThis thirteenth campaign was a joint exercise of the Regional Brewer Calibration Center for Europe (RBCC-E) and the Regional Dobson Calibration Center (RDCC-E) with the support of MeteoSwiss and of the Global Atmosphere Watch (GAW) Programme of the World Meteorological Organization (WMO). The following operations were performed by the RBCC-E during the intercomparison: Ozone calibration against the RBCC-E travelling reference (B#185) ; Compilation of the calibration histories of the instruments ; Evaluation of the Level 2 Eubrewnet ozone data for the period between intercomparisons

Dispersion test results with multiple geometries at RBCC-E campaign AROSA 2014

Presentación realizada para el MC and WG meeting celebrado en Delft (Países Bajos) del 11 al 12 de noviembre de 201