Solar radiative forcing of mixed-phase boundary layer clouds in the Arctic

北极混合相边界层云的太阳辐射强迫

• 批准号: 5420098
• 负责人: Professor Dr. Manfred Wendisch
• 金额: --
• 依托单位: Institut für Meteorologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2004
• 资助国家: 德国
• 起止时间: 2003-12-31 至 2008-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5420098?language=en
• 关键词: Solar; radiative; forcing; mixed; phase

This project is embebbed in an international effort to study climate effects of aerosols and clouds in the Arctic (VALHALA). The specific goals of the project suggested here are to evaluate the influence on the ice phase of Arctic boundary layer mixed-phase clouds on their radiative properties, and to quantify the spectral solar radiative forcing of this type of clouds. These topics have only poorly been studied in the past, although their importance for the climate system is well recognized. To reach these goals a combination of airborne radiation measurements and sophisticated single scattering an 1-D/3-D radiative transfer calculations is suggested, both in close collaboration with the partners of VALHALA. The measurements include down- and upwelling spectral irradiances with a unique instrument - the so-called albedometer. To interpret the data radiation calculations will be performed on the basis of the mixed-phase cloud microphysical properties and the spectral surface albedo determined over the Arctis ice/snow or sea surfaces. On the basis of closure between measured and calculated radiation the radiative forcing of mixed-phase clouds will be calculated.

该项目是为了研究北极(瓦尔哈拉)地区气溶胶和云层的气候影响而开展的一项国际努力。该项目的具体目标是评估北极边界层混合相云的冰相对其辐射特性的影响，并量化这类云的光谱太阳辐射强迫。过去对这些主题的研究很少，尽管它们对气候系统的重要性得到了很好的认识。为了实现这些目标，建议将航空辐射测量和复杂的单次散射相结合，并与Valhala的合作伙伴密切合作，进行一维/三维辐射传输计算。这些测量包括使用一种独特的仪器--所谓的反照率计--向下和向上的光谱辐照度。为了解释数据，将根据混合相云的微物理性质和在北极冰雪或海面上确定的光谱表面反照率进行辐射计算。根据辐射实测值与计算值之间的闭合关系，计算混合相云的辐射强迫。