The Baltic Air–Sea–Ice Study (BASIS) is a field experiment of the Baltic Sea Experiment (BALTEX) in the Baltic Sea basin. The objective of BASIS is to create and analyze an experimental data set for optimization and verification of coupled atmosphere– ice–ocean models.
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The specific objectives are:
- investigation of water budget, momentum and thermal interaction at air–ice, air–sea and sea–ice boundaries;
- investigation of the atmospheric boundary layer (ABL);
- investigation of the ocean boundary layer (OBL); and
- validation of coupled atmosphere–ice–ocean models.
The intensive field phase of BASIS took place in the Gulf of Bothnia in the Baltic Sea in a boundary zone between the open sea and the ice–covered sea from February 16 to March 7, 1998. Ships used included the Swedish RV Argos and the Finnish RV Aranda.