Balloon-borne observations and dedicated simulations of the transitions between typical states of the Arctic atmospheric boundary layer (A02)

全球变暖在北极被各种反馈过程放大。一个典型的例子是北极冬季非常浅和稳定的低空带，其特征是明显的逆温，导致地表变暖加剧。然而，使用实际测量来量化这种所谓的递减率反馈是缺乏的。此外，模型在正确表征浅层ABL和低层明显的逆温和可能的反馈过程方面存在很大困难。在冬季结束时，我们在格陵兰岛东北部的Nord站使用系留气球测量，目的是更好地了解这些过程。

Global warming is amplified in the Arctic by various feedback processes. One example considers the typically very shallow and stable ABL in the Arctic winter characterized by a pronounced temperature inversion, leading to enhanced warming at the surface. However, the quantification of this so-called lapse rate feedback using actual measurements is lacking. Furthermore, models have major difficulties to correctly represent the shallow ABL and the low-level, distinct temperature inversion and the possible feedback processes. Using tethered balloon measurements at Station Nord in northeast Greenland at the end of winter, we aim to contribute to a better understanding of these processes.