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A study of the theory and operation of a resonance fluorescence water vapour sensor for upper tropospheric humidity measurements
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Titel: |
A study of the theory and operation of a resonance fluorescence water vapour sensor for upper tropospheric humidity measurements |
In: | Meteorological Applications, 9, 2002, 4, S. 443-453 |
veröffentlicht: |
Wiley
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Umfang: | 443-453 |
ISSN: |
1350-4827 1469-8080 |
DOI: | 10.1017/s1350482702004073 |
Zusammenfassung: | <jats:title>Abstract</jats:title><jats:p>In‐situ methods for measuring upper tropospheric humidity are important for two reasons: (i) they can be used as accurate spot measurements with which to calibrate more extensive data from satellites and other sensors; (ii) they can provide high accuracy measurements from aircraft or balloon with which individual processes of transport, phase change or chemistry can be studied.</jats:p><jats:p>In either case the accuracy of the in‐situ measurement is of paramount importance. This study compares the performance and accuracy of a resonance fluorescence type of sensor (the Fluorescence Water Vapour Sensor) with a standard frost‐point hygrometer.</jats:p><jats:p>An intercomparison of these two hygrometers has confirmed a long‐standing difference between these two types of sensors (the FWVS overestimates the water vapour volume mixing ratio by 10–20%, depending on pressure). Testing the FWVS experimentally in the laboratory, along with a modelling study of the sensor has revealed that a significant source of error is due to contamination of the FWVS source emission, and the subsequent underestimation of the oxygen absorption cross‐section. Copyright © 2002 Royal Meteorological Society.</jats:p> |
Format: | E-Article |
Quelle: | Wiley (CrossRef) |
Sprache: | Englisch |