Marine Sulfur Chemistry Studies in Support of MAGE/ASTEX

为参加一项国际海洋大气化学实验，提出了一套七项提案和两项补充请求。1992年6月北大西洋东部的大西洋层积云过渡是一项多国努力，旨在提高我们研究云化学相互作用和影响它们的空气/海洋通量的能力。ASTEX的MAGE大气化学实验的具体目标包括：1)开发和测试拉格朗日策略，用于研究标记气团中的化学和气象演变，使用船只、气球和飞机；2)通过与传统方法的比较，开发和测试估算空气/海洋界面上痕量气体和气溶胶通量的新技术；3)评估海洋和大陆气溶胶的影响以及层积云的形成和消散；4)比较自然和人为的硫、卤素和碳氢化合物对海洋气溶胶化学的影响；5)使用多国、多机构的实地实验作为解决对流层化学问题的手段。在这一MAGE提案中，PIs计划进行SO2和DMS的测量以及从海洋表面到大气的DMS通量的测量，并研究云顶海洋边界层中云凝结核的来源以及与海洋云相关的云凝结核的产生。拟议的测量将从华盛顿大学的Convair C-131研究飞机上获得，拟议的研究将与同时进行的海洋-大气相互作用研究（包括船上、地面和空中测量）密切协调，作为多机构ASTEX计划的一部分进行。

A set of seven proposals and two supplement requests was submitted for participation in an international marine atmospheric chemistry experiment. The Atlantic Stratocumulus Transition in the eastern North Atlantic during June 1992, is a multinational effort designed to improve our capability for studying cloud-chemistry interactions and the air/sea fluxes that affect them. The specific goals of the MAGE atmospheric chemistry experiment in ASTEX include: 1) develop and test a Lagrangian strategy for studying chemical and meteorological evolution in a tagged airmass, using ships, balloons, and aircraft; 2) develop and test new techniques for estimating trace-gas and aerosol fluxes across the air/sea interface by comparison with traditional approaches; 3) evaluate the impact of marine and continental aerosols and the formation and dissipation of stratocumulus clouds; 4) compare the impacts of natural and anthropogenic sulfur, halogens, and hydrocarbons on marine aerosol chemistry; and 5) use a multinational, multi-agency field experiment as a means for addressing tropospheric chemistry issues. In this MAGE proposal, the PIs plan to conduct measurements of SO2 and DMS and measurements of DMS fluxes from the ocean surface to the atmosphere, and to investigate the sources of cloud condensation nuclei in the cloud-topped marine boundary layer and cloud condensation nucleus production associated with marine clouds. The proposed measurements will be obtained from the University of Washington Convair C-131 research aircraft, and the proposed studies will be closely coordinated with simultaneous studies (involving shipboard, ground-based, and airborne measurements) of ocean-atmosphere interactions to be carried out as part of the multi-agency ASTEX program.