Upper air soundings during POLARSTERN cruise ANT-XXVI/2@en

The upper air soundings are normally performed once a day to measure vertical profiles of air pressure, temperature, relative humidity and the wind vector. Helium filled balloons (TOTEX 600 g, 800 g) were used to carry Vaisala RS92-SGPW radiosondes. Whenever possible, the launches were performed about 10 UTC. Condensed measurements (TEMP Format FM-35) were transferred without delay into the Global Telecommunication System GTS were they contribute for the world wide weather forecasts. The profile data were taken every 5-10 seconds which result in a vertical profile resolution of about 25-50 meter. The profiles start at the helideck 10 m above sea level and terminate at the burst level of the balloons, normally at heights between 25 and 37 km.高空探测通常每日开展一次，用于获取气压、气温、相对湿度与风矢量的垂直廓线。本次观测采用充氦气球（TOTEX 600 g、800 g）搭载维萨拉RS92-SGPW型无线电探空仪（radiosondes）。在条件允许的情况下，探空发射均安排在协调世界时（UTC）10时左右。经压缩的观测数据（采用TEMP格式FM-35）会无延迟地传输至全球电信系统（Global Telecommunication System，GTS），为全球天气预报业务提供数据支撑。观测廓线的采样间隔为5~10秒，对应垂直分辨率约为25~50米。探测廓线的起始高度为海拔10米的直升机甲板，终止于气球的爆裂高度，通常作业高度区间介于25至37千米之间。