Horizontal km Scale Variability of Arctic Sea Ice and Atmospheric Dynamics, Aerosol, Trace Gases and Radiation for Investigating Interaction Processes of the Earth System Compartments during the Melting Season (HELiPOD4ArtofMelt)

北极海冰水平公里尺度变化和大气动力学、气溶胶、微量气体和辐射，用于研究融化季节期间地球系统分区的相互作用过程 (HELiPOD4ArtofMelt)

• 批准号: 510976112
• 负责人: Professorin Dr. Astrid Lampert
• 金额: --
• 依托单位: Department of Meteorology
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/510976112?language=en
• 关键词: Horizontal; km; Scale; Variability; Arctic

The project HELiPOD4ArtofMelt has the overall aims to contribute to understanding the impact of warm-air intrusions on the Arctic atmosphere, and to understanding processes and feedback mechanisms determining the spatially inhomogeneous onset of Arctic sea ice melt. The method consists in the analysis of airborne field data obtained during the expedition Art of Melt of the Swedish ice breaker Oden in the Atlantic sector of the Arctic Ocean in May/June 2023. The helicopter borne sonde HELiPOD is deployed with a multitude of sensors for characterising the spatial distribution and properties of the sea ice surface, atmospheric dynamics, aerosol, trace gases and radiation budget within a range of up to 100 km around the Oden. Additional complementary sensors of the international participants of the Oden expedition are included in the HELiPOD, e.g. for investigating the water vapour isotopes to study evaporation, for determining ice nucleation particles to relate the observations to cloud properties, for measuring the carbon monoxide concentration, the soot concentration, and filter samplers for subsequent microscopic laboratory analyses. Long flight legs are performed at low altitudes in the range of 15-20 m to study the ocean-sea ice-air exchange processes, and vertical profiles are done to investigate atmospheric stability and the vertical distribution and variability of the parameters. The simultaneous data sets of the different parameters allow quantifying relations and interactions, e.g. an area of increased melt pond fraction can be related directly to changes in sensible and latent heat fluxes, modifications in aerosol particle size distribution and number concentration, and subsequent alteration of the surface energy balance on small spatial scales. In addition to the continuous measurements on the Oden, the HELiPOD data provide information on the spatial variability. After final postprocessing of the large data set, the spatial variability of the different parameters is determined to derive a three-dimensional picture on the scale from below 1 km to 100 km. A special focus of the analyses with the international partners is on the characterisation of so-called „atmospheric rivers“, circulation patterns that advect warm and moist air masses in the Arctic dome, to quantify properties and modification of the atmospheric boundary layer, e.g. changes in the vertical temperatue profiles and heat fluxes, which finally impact melting. Further, the processes and interactions contributing to the spatially and temporally inhomogeneous sea ice melting onset are investigated based on the airborne observations, continuous measurements aboard Oden, and taking into account the pan-Arctic measurement network of observatories in Svalbard, Greenland and northern Scandinavia.

Helipod4Artof-Melt的项目的总体目的是有助于理解温暖空气入侵对北极气氛的影响，并了解确定北极海冰融化的空间不均匀发作的过程和反馈机制。该方法在于2023年5月/2023年5月在北极海洋大西洋地区的瑞典冰破冰船融化探险艺术中获得的空气传播现场数据的分析。直升机阳离子的直升机启用Sonde Helipod是用众多传感器部署的，用于表征100个传感器，以表征100层的速度，并在海上冰层的空间层面和辐射层的速度，大气层的动态，大气层的动态，大气层的动态，大气层的动态，大气层的动态，在奥登周围的公里。 Helipod包括Oden探险队国际参与者的其他完整传感器，例如用于研究水蒸气同位素以研究蒸发，以确定与云特性相关的冰核颗粒，以测量一氧化碳浓度，烟灰浓度和过滤样品，以进行随后的显微镜实验室分析。长飞行腿在15-20 m的低海拔范围内进行，以研究海洋冰水交换过程，并进行垂直轮廓以研究大气稳定性以及参数的垂直分布和可变性。不同参数的简单数据集允许量化关系和相互作用，例如融化池分数增加的面积可以直接与明智和潜在热通量的变化，气溶胶粒径分布和数量浓度的修饰以及随后在小空间尺度上的表面能平衡的变化。除了在ODEN上进行连续测量外，Helipod数据还提供了有关空间可变性的信息。在大型数据集的最终后处理后，确定不同参数的空间可变性，以从1 km以下至100 km的尺度上得出三维图片。与国际合作伙伴分析的特别重点是表征所谓的“大气河”，北极圆顶中冒险温暖和水分空气的循环模式，以量化大气边界层的特性和修改，例如。垂直温度曲线和热通量的变化，最终影响熔化。此外，根据空中的观察，Oden上的持续测量以及考虑到Svalbard，Greenland和Northern Scandinavia的泛极测量网络，研究了对空间和暂时不均匀的海冰融化发作的过程和相互作用。