Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 9 of 9 for “"sciamachy"”.
-
Quantifying Stratospheric Chlorine Chemistry by the Satellite Spectrometers GOME and SCIAMACHY
… of the satellite spectrometers GOME and SCIAMACHY were evaluated for the atmospheric trace gas chlorine dioxide (OClO) and analysed with respect to their relevance for the polar stratospheric ozone chemistry. OClO is an important indicator for stratospheric chlorine activation, the …
-
Retrieval of methane and carbon monoxide using near infrared spectra recorded by SCIAMACHY onboard ENVISAT : Algorithm Development and data analysis
… Onboard is, amongst others, the instrument SCIAMACHY that, for the first time in the history of space-borne remote sensing, features near infrared spectrometers measuring sunlight reflected and scattered back from the earth’s surface and atmosphere. In contrast to thermal emission sounders, …
-
Estimating source strengths and lifetime of Nitrogen Oxides from satellite data
… spectra of the satellite instruments GOME and SCIAMACHY were used to determine tropospheric column densities of NO2. The resulting dataset, comprising eight years with global coverage, allows the identification, characterization and quantification of the different sources of nitrogen oxides. In …
-
Investigation of Inorganic Stratospheric Bromine using Balloon-Borne DOAS Measurements and Model Simulations
… trajectories which match the balloon data with SCIAMACHY (SCanning Imaging Absorption spectroMeter for Atmospheric CHartographY) satellite observations in order to produce a set of BrO profiles suitable for SCIAMACHY validation. Furthermore, DOAS BrO observations were used to infer the trend of …
-
Band to Band Calibration and Relative Gain Analysis of Satellite Sensors Using Deep Convective Clouds
… calibrated reflective bands of Landsat 8 using SCIAMACHY Deep Convective Cloud (DCC) spectra. Second, a novel method to derive relative gains using DCCs and improve the image quality of cirrus band scenes was developed. DCCs are very cold, bright clouds located in the tropopause layer. At small …
-
Airborne Multi AXis DOAS instrument and measurements of two-dimensional tropospheric trace gas distributions
… vertical NO2 columns for AMAXDOAS and SCIAMACHY measurements will be derived, if the AMF calculation is based on independent observation. The linear correlation between the datasets results in a slope of 1 ± 0.07. Due to the measurement system the AMAXDOAS instrument is ideal for flux …
-
Case Studies of Stratospheric Nitrogen, Chlorine and Iodine Photochemistry Based on Balloon Borne UV/visible and IR Absorption Spectroscopy
… borne instruments and the satellite borne SCIAMACHY instrument yields reasonable agreement. The variety of trace gases measured by the LPMA/DOAS balloon payload allows for investigation of the budget and partitioning of stratospheric nitrogen and chlorine under several geophysical …
-
Modelling Mesopause OH* Emissions using a Global Circulation Model
… as SABER on board NASA’s TIMED satellite and SCIAMACHY on board the ESA’s ENVISAT. General Circulation Models (GCM’s) represent the best tools available to test our understanding of the physical, chemical and radiative processes of the middle atmosphere. In this thesis, a one-dimensional (1-D) …