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Found 6 results.

S-VELD - Sentinel-5P Surface NO2 - Germany, Daily/Orbit

This collection contains surface NO2 concentrations for Germany derived from Sentinel-5P/TROPOMI data. The Sentinel-5P NO2 data is generated by DLR and provided in the framework of the mFUND-Project "S-VELD". The surface NO2 data are concentrations with the unit "µg/m3". Sentinel-5P observes Germany once per day at ~12:00 UTC. These daily observations are gridded onto a regular UTM grid. The day and measurement time are included in the netCDF data file. Only surface NO2 data for cloud-free Sentinel-5P measurements are provided (cloud fraction less than ~0.2). Sentinel-5P cloud fraction data is included in this collection as well.

S-VELD - Sentinel-5P NO2 - Germany, Daily/Orbit

This collection contains tropospheric NO2 columns for Germany and surrounding areas derived from Sentinel-5P/TROPOMI Level-1B data. The Sentinel-5P tropospheric NO2 data is generated by DLR and provided in the framework of the mFUND-Project "S-VELD". The tropospheric NO2 data are vertical column densities with the unit "µmol/m2". Sentinel-5P observes Germany once per day at ~12:00 UTC. These daily observations are gridded onto a regular UTM grid. The day and measurement time are included in the netCDF data file. Only tropospheric NO2 data for cloud-free Sentinel-5P measurements are provided (cloud fraction < ~0.2). Sentinel-5P cloud fraction data is included in this collection as well.

S-VELD - Sentinel-5P Surface NO2 - Germany, Monthly

This collection contains monthly mean surface NO2 concentrations for Germany derived from Sentinel-5P/TROPOMI data. The Sentinel-5P NO2 data is generated by DLR and provided in the framework of the mFUND-Project "S-VELD". The surface NO2 data are concentrations with the unit "μg/m3". Sentinel-5P observes Germany once per day at ~12:00 UTC and only cloud-free measurements (cloud fraction less than ~0.2) are used. The Sentinel-5P surface NO2 data within each month are averaged and gridded onto a regular UTM grid. The number of measurements used in the calculation of the averaged value are included in this collection as well.

S-VELD - Sentinel-5P NO2 - Germany, Monthly

This collection contains monthly mean tropospheric NO2 columns for Germany and surrounding areas derived from Sentinel-5P/TROPOMI Level-1B data. The Sentinel-5P tropospheric NO2 data is generated by DLR and provided in the framework of the mFUND-Project "S-VELD". The tropospheric NO2 data are vertical column densities with the unit "μmol/m2". Sentinel-5P observes Germany once per day at ~12:00 UTC and only cloud-free measurements (cloud fraction < ~0.2) are used. The Sentinel-5P tropospheric NO2 data within each month are averaged and gridded onto a regular UTM grid. The number of measurements used in the calculation of the averaged value are included in this collection as well.

Beyond Europe - X-panda: Improving global air quality measurements: Extending the Pandonia network to Argentina

Das Projekt "Beyond Europe - X-panda: Improving global air quality measurements: Extending the Pandonia network to Argentina" wird/wurde gefördert durch: Österreichische Forschungsförderungsgesellschaft mbH (FFG). Es wird/wurde ausgeführt durch: LuftBlick OG.Global networks of ground based measurements of trace gases and aerosols are essential for monitoring atmospheric changes and the validation of satellite observations. These data are the key for improving the scientific understanding of the earth's atmosphere with respect to climate change and air quality. The goal of this project is the establishment of a scalable infrastructure for an innovative worldwide measurement network for atmospheric constituents. The new network is based on the existing small scale Pandonia network consisting of six Pandora instruments. The Pandora is a next generation type diode array spectroradiometer for solar irradiance and sky radiance measurements in a broad spectral range which allows the combined retrieval of multiple trace gases and aerosols. The necessary infrastructure for scalability of Pandonia includes calibration, data management and visualization routines. So within this project a mobile calibration system will be designed, characterized and incorporated into a homogeneous calibration procedure to ensure a longer term radiometric stability of network instruments. Furthermore, the data management will be improved and streamlined for all instruments. This implies that the calibration procedure, data analysis and quality control are performed in a homogeneous way. The users will be able to easily access and visualize the data from a single source, in near real time. Two Pandora instruments will then be set up at new locations in Argentina. These two instruments will be calibrated and integrated into the Pandonia network and will show case the scalability of the network. The successful project will then allow the incorporation of existing Pandora instruments at worldwide locations and create an incentive for new instruments to be ordered from the scientific community and national institutions. The Austrian company LuftBlick Earth Observation Technology will be able to expand its relationships beyond Europe and benefit not only from the larger market for Pandora instruments but also from the long term commitment in the global measurement network operation and maintenance. This will firmly establish them on the international level and constitute a sustainable business basis for the future.

Laser photo-acousitc spectroscopy of gases

Das Projekt "Laser photo-acousitc spectroscopy of gases" wird/wurde gefördert durch: Eidgenössische Technische Hochschule Zürich / Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung. Es wird/wurde ausgeführt durch: Eidgenössische Technische Hochschule Zürich, Institut für Quantenelektronik, Laboratorium für Laserspektroskopie und Umweltanalytik.This project is aimed at the development of laser-photoacoustic spectroscopy to trace gas monitoring. Part A involves a home-made mobile CO2 laser photoacoustic system whose potential is further extended by the implementation of several new features such as the use of laser isotopes, photoacoustic Stark cell, multipass cells, etc. The regional field studies focus on VOC, ozone and ammonia monitoring in different environments. In collaboration with FAW Waedenswil the emission of key substances of fruits that are stored under different and varying atmospheres is investigated. Compounds of interest for the fermentation process include ethanol, acetaldehyde, ethyl acetate and others. The second part concerns our high-pressure CO2 laser photoacoustic setup. Thanks to the continuous, rather than only discrete, wavelength tunability and the narrow linewidth of the laser source, this device is particularly suited for the analysis of multicomponent trace gas mixtures. Furthermore, time-resolved monitoring of the generated acoustic pulses and photothermal beam deflection signals is performed. These results yield new insights into molecular relaxation processes and reaction kinetics. Leading Questions: - How versatile are laser spectroscopic detection schemes with respect to atmospheric trace gas monitoring? - Which levels of detection sensitivity and selectivity can be achieved and how do they compare with more conventional techniques? - How suitable are laser techniques for field applications? - How could novel laser developments further improve the potential for environmental sensing?

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