Iberonesia

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

Comparative study between Brewer spectrophotometer networks

Comunicación presentada en el Meeting COST 1207 European Brewer Network, celebrado en Delft, los días 11-12 de November 2014

NeuBrew

Comunicación presentada en el Meeting WG3 Database Meeting in Arosa celebrado los días 23-24 de julio en Arosa, Suiza

Brewer-OMI validation

Presentación realizada en: Brewer Ozone Spectrophotometer/Metrology Open Workshop, celebrado en Ponta Delgada (Sao Miguel, Azores) del 17 al 20 de mayo de 2016

RBCC-E Triad

Comunicación presentada en: Brewer Ozone Spectrophotometer/Metrology Open Workshop celebrado del 17 al 20 de mayo de 2016 en Ponta Delgada, Azores, Portugal

Internal consistency of the Regional Brewer Calibration Centre for Europe triad during the period 2005–2016

Total ozone column measurements can be made using Brewer spectrophotometers, which are calibrated periodically in intercomparison campaigns with respect to a reference instrument. In 2003, the Regional Brewer Calibration Centre for Europe (RBCC-E) was established at the Izaña Atmospheric Research Center (Canary Islands, Spain), and since 2011 the RBCC-E has transferred its calibration based on the Langley method using travelling standard(s) that are wholly and independently calibrated at Izaña. This work is focused on reporting the consistency of the measurements of the RBCC-E triad (Brewer instruments #157, #183 and #185) made at the Izaña Atmospheric Observatory during the period 2005–2016. In order to study the long-term precision of the RBCC-E triad, it must be taken into account that each Brewer takes a large number of measurements every day and, hence, it becomes necessary to calculate a representative value of all of them. This value was calculated from two different methods previously used to study the long-term behaviour of the world reference triad (Toronto triad) and Arosa triad. Applying their procedures to the data from the RBCC-E triad allows the comparison of the three instruments. In daily averages, applying the procedure used for the world reference triad, the RBCC-E triad presents a relative standard deviation equal to σ = 0.41%, which is calculated as the mean of the individual values for each Brewer (σ157 = 0.362%, σ183 = 0.453% and σ185 = 0.428%). Alternatively, using the procedure used to analyse the Arosa triad, the RBCC-E presents a relative standard deviation of about σ = 0.5%. In monthly averages, the method used for the data from the world reference triad gives a relative standard deviation mean equal to σ = 0.3% (σ157 = 0.33%, σ183 = 0.34% and σ185 = 0.23%). However, the procedure of the Arosa triad gives monthly values of σ = 0.5%. In this work, two ozone data sets are analysed: the first includes all the ozone measurements available, while the second only includes the simultaneous measurements of all three instruments. Furthermore, this paper also describes the Langley method used to determine the extraterrestrial constant (ETC) for the RBCC-E triad, the necessary first step toward accurate ozone calculation. Finally, the short-term or intraday consistency is also studied to identify the effect of the solar zenith angle on the precision of the RBCC-E triad.This work has been supported by the European Metrology Research Programme (EMRP) within the joint research project ENV59 “Traceability for atmospheric total column ozone” (ATMOZ)

Brewer-OMI validation: a brief tutorial

Presentación realizada en: Brewer Ozone Spectrophotometer/Metrology Open Workshop, celebrado en Ponta Delgada (Sao Miguel, Azores) del 17 al 20 de mayo de 2016

The Regional Brewer Calibration Center - Europe: an overview of the X Brewer Intercomparison Campaign

Comunicación presentada en: TECO-2016 (Technical Conference on Meteorological and Environmental Instruments and Methods of Observation) celebrada en Madrid, del 27 al 30 de septiembre de 2016.The X Regional Brewer Calibration Center - Europe (RBCC-E) intercomparison campaign was held at El Arenosillo atmospheric sounding station of the Instituto Nacional de Tecnica Aeroespacial (INTA) during the period of May 25th – June 5th, 2015. This X Brewer intercomparison campaign was a joint effort of EUBREWNET and the Area of Instrumentation and Atmospheric Research of INTA, with the support of COST Action 1207. Twenty one Brewer instruments from eleven countries participated at the El Arenosillo campaign. In addition, the solar UV irradiance calibration was performed by the traveling reference standard QASUME of the World Calibration Center for UV (WCC-UV). This work shows a general overview of the ozone comparison focused on the correction of the stray light effect for the single-monochromator Brewer spectrophotometer derived by the comparison with a reference double-monochromator Brewer. At the beginning of the campaign, 16 out of the 21 participating Brewer instruments (76%) agreed to better than ± 1%, and 10 instruments (50%) agreed to better than ± 0.5%. After applying the final calibration that included the stray light correction, all working instruments agreed at the ± 0.5% level

Aerosol Optical Depth

Presentación realizada en: Quadrennial Ozone Symposium, celebrado en Edimburgo del 4 al 9 de septiembre de 2016

Stability of the RBCC-E Triad during the period 2005 - 2015

Póster elaborado para el Quadrennial Ozone Symposium celebrado en Edinburgh los días 4–9 de septiembre de 2016