High resolution atmospheric measurements during descending profile SP50317t25 with POLAR 5@en

The data set consists of high resolution airborne measurements that were obtained mainly over Svalbard and near the sea ice edge north of Svalbard on three days in March 2013 during the campaign \"SpringTime Atmospheric Boundary Layer Experiment (STABLE). STABLE was led by the Alfred Wegener Institue (AWI) and by the Finnish Meteorological Institute (FMI). The measurements were performed using the POLAR 5 research aircraft, where all research flights of 5-6 hours duration started and ended at Longyearbyen airport. During STABLE, observations focused on the vertical structure of the lower troposphere as well as boundary layer modifications, e.g. during marine cold-air outbreaks and by convection over leads in sea ice. The data set presented here predominantly consists of measurements that were obtained over the Wijdefjorden, which is a North-South oriented fjord with a length of more than 100km in the northern part of Spitsbergen. The measurements were carried out to study the boundary layer structure in the fjord as well as for analyses of the role of the topography on the atmospheric conditions. In its southern part, the fjord was covered by land-fast sea ice until about 72.5km north of the fjord's head. In its northern part, there was open water.本数据集包含高分辨率机载观测数据，采集工作于2013年3月的三次飞行任务中完成，观测区域以斯瓦尔巴群岛（Svalbard）为主，同时覆盖该群岛北侧的海冰边缘附近海域，隶属于“春季大气边界层实验（SpringTime Atmospheric Boundary Layer Experiment, STABLE）”科考项目。该项目由阿尔弗雷德·魏格纳研究所（Alfred Wegener Institute, AWI）与芬兰气象研究所（Finnish Meteorological Institute, FMI）联合主导。观测任务搭载POLAR 5号科研飞机执行，所有单次时长5至6小时的科研飞行均以朗伊尔城机场（Longyearbyen airport）作为起降基点。本次科考的观测重点聚焦于对流层（troposphere）低层的垂直结构，以及大气边界层（atmospheric boundary layer）的改造特征，例如海洋性冷空气爆发期间，或是海冰裂缝（leads in sea ice）上方对流活动引发的边界层变化。本数据集收录的核心观测数据主要采集自维德菲约伦（Wijdefjorden）：该峡湾位于斯匹次卑尔根岛（Spitsbergen）北部，呈南北走向，全长超过100千米。开展本次观测的目的为研究该峡湾内的大气边界层结构，同时分析地形对大气环境的调控作用。该峡湾南部区域在湾头以北约72.5千米范围内均被固定海冰（land-fast sea ice）覆盖，而峡湾北部则分布有开阔水域。