Project Description
The ASTAR 2000 campaign, a joint German (AWI Potsdam) - Japanese (NIPR Tokyo) campaign with participation from NASA LaRC Hampton, VA (USA), took place from March 12, 2000 until April 24, 2000 with flight operations from March 13, 2000 to April 20, 2000. In addition to AWI, NIPR, and NASA LaRC the following institutions contributed to the project: Hokkaido University (Japan), Nagoya University (Japan), Norwegian Polar Institute Tromsoe/
Longyearbyen (Norway), NILU Kjeller (Norway), MISU Stockholm (Sweden), NOAA-CMDL Boulder, CO (USA) and Max Planck Institute for Aeronomy Katlenburg-Lindau (Germany).
We performed aircraft measurements with the German Research aircraft POLAR 4 of the Alfred Wegener Instiute for Polar and Marine Research in the vicinity of Svalbard. The aircraft operation have been performed from the airport Longyearbyen. Simultaneous ground-based measurements have been performed in Ny-Aalesund. Flight operation and the maintenance of on board instrumentation was realised by Deutsche Luft und Raumfahrt Oberpfaffenhofen/Braunschweig (Germany) and Aerodata Braunschweig (Germany).
For the Arctic spring a set of 18 extinction profiles were collected by the aircraft, covering background and various haze conditions. 12 extinction profiles were collected close to Ny-Aalesund with additional ground-based measurements. During the campaign new systems were used, like ground based Raman-Lidar, Star Photometer, Tethered balloon and an absorption photometer (PSAP), which was installed in the research aircraft. Based on these measurements the tropospheric Arctic aerosols and their climate impact will be analysed.
Main Goals of the Project
The main goals of the project are
- to measure aerosol parameters of climate relevance, like extinction coefficient, absoprtion coefficients, and phase function.
- to create and Arctic Aerosol Data Set to apply for climate impact investigation, by using the regional climate model HIRHAM.
to carried out comparison measurements with the SAGE II (Stratospheric Aerosol and Gas Experiment) ant the ground based Raman-Lidar.