Antarctic ice topography and 150 mb circulation from the Nimbus-6 TWERL ExperimentMany TWERLE balloons floating at an altitude of about 12.5 km, traversed the Antarctic during its 1975/6 summer. The balloons' positions were accurately determined by the Nimbus-6 satellite, which also received their sensors' data: radio altimeter, pressure and temperature. Subtracting the altimeter readings from the calculated balloon altitude above sea-level (a.s.l.) provides the Antarctic surface elevation at the balloon subtrack. The balloon altitude a.s.l. is calculated from daily synoptic maps covering latitudes south of 45 deg S. These maps are prepared using the regular radiosonde network supplemented by four times as many TWERLE balloons.
Document ID
19770062969
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Levanon, N. (Tel Aviv University Tel Aviv, Israel)
Julian, P. R. (National Center for Atmospheric Research Boulder, Colo., United States)
Suomi, V. E. (Wisconsin, University Madison, Wis., United States)