The STABLE experiments provided
some information on the surface energy balance at Halley, but
they were designed as short-term process studies, concentrating
on the Antarctic winter. In order to develop a climatology of the
year-round surface energy balance at Halley, instruments for
monitoring the surface energy balance on a long-term basis
were deployed at the station early in 1995.
The instrumentation is shown schematically in the diagram
below and comprises:
- A Kaijo-Denki DAT-100 sonic anemometer for eddy-
correlation flux measurements
- Vaisala HMP35A temperature/humidity probes in
ventilated radiation shields at three levels
- A Porton cup anemometer and vane for additional wind
measurements
- A precision frost-point hygrometer (MBW Elektronik DP3-
D/SH) with a heated sample inlet tube for accurate humidity
measurements
- A Heimann KT19 infra-red thermometer for snow surface
temperature measurement
- Platinum resistance probes for snow temperature
measurement
- A net radiometer
In January 1997, additional instrumentation was added as part
of the EC-funded project "POLAR SNOW". This included:
- Kipp and Zonen solarimeters for direct, diffuse and
relected solar radiation
- A Kipp and Zonen pyrgeometer for incoming longwave
radiation
- Additional snow temperature probes to provide a profile to
10 m depth
Enquiries should be directed to
Phil Anderson
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