BASIS 2001 - Baltic Air Sea Ice Study 2001


Brümmer, Burghard et al.

The field experiment BASIS 2001 took place in the Gulf of Bothnia of the Baltic Sea. The Finnish Research Vessel Aranda kept a fixed position in the pack ice and was a base for standard meteorological measurements and radiosonde ascents. Surface measurements were also taken at four land stations (Marjaniemi, Oulu, Kuivaniemi, Haparanda). The research aircraft DO-128 of the University Braunschweig performed 10 flight missions.

The BASIS experiments as well as ALKOR 2000 and 2001 are part of the research compound BALTIMOS (BALTic sea Integrated MOdel System). BALTIMOS in turn is part of the Baltic Sea Experiment (BALTEX).
The overall objective of all eight field experiments (BASIS and ALKOR) was to collect a comprehensive data set suited to validate the coupled model system BALTIMOS for the Baltic Sea region. The observations mainly focus on:

- the atmospheric boundary layer structure and processes and the air-sea-ice interaction over areas with inhomogeneous sea ice cover

- the atmospheric boundary layer structure over open water under different synoptic conditions such as cold-air advection, warm-air advection or frontal passages.

In addition to the published datasets several other measurements were performed during the experiment. Corresonding datasets will be published in the near future and are available on request.
Details about all used platforms and sensors and all performed measurements are listed in the fieldreport.
The following datasets are available on request: meteorological station Marjaniemi and Oulu airport, ground data at RV Aranda, 10 flights of research aircraft DO-128
UNI_HH_MI_fielddata (Field Data of the Meteorological Institute, University of Hamburg)
Dr. Gerd Müller (
Baltic Sea
Spatial Coverage
Longitude 22.5 to 25.5 Latitude 64.5 to 66
Temporal Coverage
2001-02-12 to 2001-02-23 (calendrical)
Use constraints
For scientific use only
Data Catalog
World Data Center for Climate
1.99 MiB (2088960 Byte)
completely archived
Creation Date
Cite as
Brümmer, Burghard; Müller, Gerd; Vihma, Timo; Wetzel, Christian (2012). BASIS 2001 - Baltic Air Sea Ice Study 2001: meteorological measurements of 2 autonomous buoys and radiosoundings at the research vessel Aranda. World Data Center for Climate (WDCC) at DKRZ.

[Entry acronym: UNI_HH_MI_BASIS2001] [Entry id: 2250980]
observation: Level2c
All presented data is observational. Accuracy and precision are dependent on sensors and platforms. Details to sensor types, error sources and quality checking are given in Additional Information accompanying each dataset.;All datasets passed several quality checks. Quality control took place during the field phase; data were controlled during their use for research and and again before publishing.
Data were processed with objective algorithms (e.g. to reject values out of range) and were controlled subjectively by experienced researchers. The processing is described in detail in the documentation of each dataset.
In addition the buoy dataset contains unprocessed raw data files as provided by ARGOS.
Data acquisition is completed.
Result Date
1. Number of data sets is correct and > 0: passed;
2. Size of every data set is > 0: passed;
3. The data sets and corresponding metadata are accessible: passed;
4. The data sizes are controlled and correct: passed;
6. The format is correct: passed;
7. Variable description and data are consistent: passed
WDCC-TQA checklist
Method Description
Checks performed by WDCC. The list of TQA metrics are documented in the 'WDCC User Guide for Data Publication' Chapter 8.1.1
Method Url
Result Date
Contact typePersonORCIDInstitute
Contact Dr. Gerd Müller-University of Hamburg (MI)
Author Prof. Dr. Burghard Brümmer-University of Hamburg (MI)
Author Dr. Gerd Müller-University of Hamburg (MI)
Author Timo Vihma-Finnish Institute of Marine Research
Author Christian Wetzel-University of Hamburg (MI)
Principal Investigator Prof. Dr. Burghard Brümmer-University of Hamburg (MI)
Investigator Jouko Launiainen-Finnish Institute of Marine Research
Originator Dr. Gerd Müller-University of Hamburg (MI)
Technical Michael Offermann-University of Hamburg (MI)
Contributor --Finnish Institute of Marine Research
Contributor --University of Hamburg (MI)
Metadata Christian Wetzel-University of Hamburg (MI)

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