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| Titel |
Study of surface energy budget and test of a newly developed fast photoacoustic spectroscopy based hygrometer in field campaign Szeged (Hungary) |
| VerfasserIn |
Dávid Tátrai, Daniella Nikov, Ervin Zsolt Jász, Zoltan Bozoki, Gábor Szabó, Tamás Weidinger, Zénó András Gyöngyösi, Melinda Kiss, János Józsa, Gemma Simó Diego, Joan Cuxart Rodamilans, Burkhart Wrenger, Zsolt Bottyan |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250097734
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| Publikation (Nr.) |
 EGU/EGU2014-13345.pdf |
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| Zusammenfassung |
| A micrometeorological field measurement campaign dedicated to study the surface
energy budget and the structure of the boundary layer focusing on the transient
layer forming periods during night-time was organized in the period of 10th of
November to 3rd of December 2013 in the nearby of Szeged, Hungary. A temporary
micrometeorological measurement station was set up at the coordinates N:46.239943;
E:20.089758, approximately 1700 m far from a national meteorology station (N:46.255711;
E:20.09052).
In the experimental micrometeorological site different types of instruments were installed
to measure numerous parameters:
standard meteorological measurements (p, T, wet, wind speed and direction at
three different levels, relative humidity at two levels and absolute humidity at
one level)
radiation budget components
surface temperature and leaf wetness
soil temperature, moisture and heat flux into the deeper soil layer
eddy-covariance measurements (t, H, LE CO2) at 3 m level using Campbell
open-path IRGA (EC150) system.
At the national meteorology station (http://adatok.geo.u-szeged.hu/?lang=eng) besides
their standard measurement equipment and measurement routine a SODAR was installed and
continuously operated.
These ground based measurements were combined with and supported by UAV,
quadcopter and tethered balloon based vertical profile measurements of p, T, rh.
For this measurement campaign as a modification of a previously developed airborne
ready dual channel hygrometer, a fast photoacoustic spectroscopy based hygrometer was
developed for absolute humidity measurements. The estimated response time of the system is
faster than 15 Hz, which was achieved by the replacement of the data acquisition system and
by recording the raw photoacoustic signal sampled at rate of 48 kHz for post-processing.
During the campaign this new system was compared to a TDL system commercially available
at Li-COR Inc.
Besides the testing of the newly developed fast photoacoustic hygrometer the main goal
of the present study is the determination of the total energy budget and the accuracy
of its closure. Results and consequences of the measurements will be presented. |
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