Atmospheric trace gas measurements from the European Space Agency's Global Ozone Monitoring Experiment

1998 ◽  
Author(s):  
Kelly V. Chance ◽  
Robert J. D. Spurr ◽  
Thomas P. Kurosu
Keyword(s):  
Trace Gas ◽  
Ozone Monitoring ◽  
Gas Measurements ◽  
Atmospheric Trace Gas

Atmospheric trace gas measurements at Palmer Station, Antarctica: 1982?83

1984 ◽  
Vol 2 (1) ◽  
pp. 65-81 ◽  
Author(s):  
E. Robinson ◽  
W. L. Bamesberger ◽  
F. A. Menzia ◽  
A. S. Waylett ◽  
S. F. Waylett
Keyword(s):  
Trace Gas ◽  
Palmer Station ◽  
Gas Measurements ◽  
Atmospheric Trace Gas

scholarly journals Investigation of adsorption and desorption behavior of small-volume cylinders and its relevance for atmospheric trace gas analysis

2020 ◽  
Vol 13 (1) ◽  
pp. 101-117 ◽  
Author(s):  
Ece Satar ◽  
Peter Nyfeler ◽  
Bernhard Bereiter ◽  
Céline Pascale ◽  
Bernhard Niederhauser ◽  
...  
Keyword(s):  
Small Volume ◽  
Gas Analysis ◽  
Trace Gas ◽  
Steel Cylinder ◽  
Adsorption And Desorption ◽  
Quantum Cascade ◽  
Aluminum Cylinder ◽  
Gas Measurements ◽  
Spectrometer System ◽  
Atmospheric Trace Gas

Abstract. Atmospheric trace gas measurements of greenhouse gases are critical in their precision and accuracy. In the past 5 years, atmospheric measurement and gas metrology communities have turned their attention to possible surface effects due to pressure and temperature variations during a standard cylinder's lifetime. This study concentrates on this issue by introducing newly built small-volume aluminum and steel cylinders which enable the investigation of trace gases and their affinity for adsorption and desorption on various surfaces over a set of temperature and pressure ranges. The presented experiments are designed to test the filling pressure dependencies up to 30 bar and temperature dependencies from −10 ∘C up to 180 ∘C for these prototype cylinders. We present measurements of CO2, CH4, CO and H2O using a cavity ring-down spectroscopy analyzer under these conditions. Moreover, we investigated CO2 amount fractions using a novel quantum cascade laser spectrometer system enabling measurements at pressures as a low as 5 mbar. This extensive dataset revealed that for absolute pressures down to 150 mbar the enhancement in the amount fraction of CO2 relative to its initial value (at 1200 mbar absolute) is limited to 0.12 µmol mol−1 for the prototype aluminum cylinder. Up to 80 ∘C, the aluminum cylinder showed superior results and less response to varying temperature compared to the steel cylinder. For CO2, these changes were insignificant at 80 ∘C for the aluminum cylinder, whereas a 0.11 µmol mol−1 enhancement for the steel cylinder was observed. High-temperature experiments showed that for both cylinders irreversible temperature effects occur especially above 130 ∘C.

Four-laser airborne infrared spectrometer for atmospheric trace gas measurements

1996 ◽  
Vol 35 (36) ◽  
pp. 7075 ◽  
Author(s):  
J. Roths ◽  
T. Zenker ◽  
U. Parchatka ◽  
F. G. Wienhold ◽  
G. W. Harris
Keyword(s):  
Trace Gas ◽  
Infrared Spectrometer ◽  
Gas Measurements ◽  
Atmospheric Trace Gas

Atmospheric trace gas measurements with a new clean air sampling system

1981 ◽  
Vol 8 (10) ◽  
pp. 1079-1082 ◽  
Author(s):  
R. Leifer ◽  
K. Sommers ◽  
S. F. Guggenheim
Keyword(s):  
Air Sampling ◽  
Trace Gas ◽  
Sampling System ◽  
Clean Air ◽  
Gas Measurements ◽  
Atmospheric Trace Gas

scholarly journals Retrieval methods of effective cloud cover from the GOME instrument: an intercomparison

2004 ◽  
Vol 4 (1) ◽  
pp. 255-273 ◽  
Author(s):  
O. N. E. Tuinder ◽  
R. de Winter-Sorkina ◽  
P. J. H. Builtjes
Keyword(s):  
Recognition Algorithm ◽  
Cloud Fraction ◽  
Trace Gas ◽  
Actinic Flux ◽  
Fitting Algorithm ◽  
Retrieval Scheme ◽  
Ozone Monitoring ◽  
Radiative Scattering ◽  
Atmospheric Trace Gas ◽  
Surface Observations

Abstract. The radiative scattering by clouds leads to errors in the retrieval of column densities and concentration profiles of atmospheric trace gas species from satellites. Moreover, the presence of clouds changes the UV actinic flux and the photo-dissociation rates of various species significantly. The Global Ozone Monitoring Experiment (GOME) instrument on the ERS-2 satellite, principally designed to retrieve trace gases in the atmosphere, is also capable of detecting clouds. Four cloud fraction retrieval methods for GOME data that have been developed are discussed in this paper (the Initial Cloud Fitting Algorithm, the PMD Cloud Recognition Algorithm, the Optical Cloud Recognition Algorithm (an in-house version and the official implementation) and the Fast Retrieval Scheme for Clouds from the Oxygen A-band). Their results of cloud fraction retrieval are compared to each-other and also to synoptic surface observations. It is shown that all studied retrieval methods calculate an effective cloud fraction that is related to a cloud with a high optical thickness. Generally, we found ICFA to produce the lowest cloud fractions, followed by our in-house OCRA implementation, FRESCO, PC2K and finally the official OCRA implementation along four processed tracks (+2%, +10%, +15% and +25% compared to ICFA respectively). Synoptical surface observations gave the highest absolute cloud fraction when compared with individual PMD sub-pixels of roughly the same size.

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