High resolution atmospheric measurements during low-level horizontal flight leg SP50317h03 with POLAR 5

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航空探测数据，相关探测工作于2013年3月的三次飞行任务中开展，主要覆盖区域为斯瓦尔巴群岛（Svalbard）以及该群岛北侧的海冰边缘附近海域，所属科研航次为“春季大气边界层实验（SpringTime Atmospheric Boundary Layer Experiment, STABLE）”。本次航缘由阿尔弗雷德·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，探测搭载于POLAR 5号科研飞机，所有时长5至6小时的科研飞行均以朗伊尔城机场作为起降点。STABLE实验期间，观测重点聚焦于对流层低层的垂直结构以及边界层的变化特征，例如海洋冷气团爆发过程以及海冰冰间湖对流活动引发的边界层扰动。本次公开的数据集主体数据采集于维杰峡湾（Wijdefjorden）——该峡湾呈南北走向，位于斯匹次卑尔根岛北部，全长超过100千米。本次探测旨在研究该峡湾内的大气边界层结构，并分析地形对大气环境的影响作用。峡湾南部区域在距峡湾顶端以北约72.5千米范围内被固定海冰覆盖，而峡湾北部则存在开阔水域。