ACSYS 2003 - Arctic Atmospheric Boundary Layer and Sea Ice Interaction Study north of Spitsbergen: meteorological measurements of the research aircraft Falcon, 11 autonomous ice buoys and radiosoundings at the research vessels Aranda and Polarstern

From 26 March to 22 April 2003, Germany and Finland carried out a joint expedition (ABSIS - Arctic Atmospheric Boundary Layer and Sea Ice Interaction Study) to test and improve the description of the ocean-ice-atmosphere interaction processes. ABSIS was part of the German ACSYS (Arctic Climate System Study) contribution supported by the Ministry of Education and Research and was connected with the RV Polarstern Winter Arctic Polynia Study expedition. The main objectives of ABSIS were to collect data sets to quantify and study: (a) the thermodynamic and dynamic interaction processes at the ice-atmosphere interface and (b) the vertical structure of the atmospheric boundary layer, particularly the Arctic inversion. The latter is a nearly permanent feature over the sea ice. The Arctic inversion is particularly low and strong in winter and effects the exchange between the boundary layer and the free atmosphere as well as the interaction processes at the ice surface.

To achieve the above-mentioned objectives various platforms were applied and placed within a 200 km2 area north of Spitsbergen during the expedition period 26 March to 22 April 2003: RV Polarstern and RV Aranda, a research aircraft (Falcon-20 of the German Aerospace Center), 11 automatic ice buoys, and one ice camp station close to RV Polarstern (8-18 April 2003 only).

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: ground data at RV Aranda, ground data at RV Polarstern, ice station near RV Polarstern

自2003年3月26日至4月22日，德国与芬兰联合开展了一次（ABSIS - 北极大气边界层与海冰相互作用研究）联合探险，旨在检验与提升海洋-冰-大气相互作用过程的描述。ABSIS项目是德国ACSYS（北极气候系统研究）贡献的一部分，由教育部和科研部支持，并与“极星”号破冰船在冬季北极多边形海域的研究探险相连接。ABSIS的主要目标是为以下内容收集数据集以进行量化研究：（a）冰-大气界面处的热力学与动力学相互作用过程；（b）大气边界层的垂直结构，特别是北极逆温层。该逆温层在海洋冰面上几乎是一种永久性的特征，尤其在冬季，其逆温层尤为低且强烈，影响边界层与自由大气之间的交换以及冰面处的相互作用过程。

为达成上述目标，在2003年3月26日至4月22日的探险期间，在斯匹次卑尔根岛北部约200平方公里区域内部署了多种平台：极星号破冰船和阿拉达号研究船、一架德国航空航天中心的Falcon-20研究飞机、11个自动冰浮标以及一个靠近极星号破冰船的冰站（仅于2003年4月8日至18日使用）。

除了已发布的数据库外，实验期间还进行了其他测量。相应的数据集将在近期内发布，并可应要求提供。所有使用的平台和传感器以及所有进行的测量均在现场报告中详细列出。以下数据集可供请求：阿拉达号地面的数据、极星号地面的数据、靠近极星号的冰站数据。