INDOEX - Field Experiment in the Indian Ocean: Continuous Measurements of Aerosol Chemical, Physical, and Optical Properties in the Marine Boundary Layer at Male,Indian Ocean

9612895普罗斯佩罗印度洋实验(INDOEX)是一项由法国、德国、印度、荷兰和美国参与的国际实地实验。美国部分下的主要工作重点是评估硫酸盐和其他大陆气溶胶在全球辐射强迫中的作用，并得到能源部和国家科学基金会的联合支持。此外，其他联邦机构和其他国际伙伴的科学家将进行涉及各种相关化学和辐射过程调查的补充性研究。综合观测系统包括从船舶到飞机的各种平台，以及地面和气球测量系统以及卫星数据。三年工作的主要部分将是从1999年1月开始的为期四个月的密集实地阶段。该计划的最终目标是更好地了解十年和更长时间尺度的气候强迫。东北冬季季风季的赤道印度洋为这项实验提供了一个独特的天然实验室。实验区可能是世界上唯一一个被来自北半球的大陆气溶胶、人为痕量物种及其反应产物(如硫酸盐和臭氧)的强烈来源所改变的气团在热带辐合区与南半球原始空气接触的地方，南半球原始空气是通过跨赤道季风气流输送的。这两个非常不同的气团并列在一起，将使我们能够彻底检查气溶胶对大气辐射特性的直接和间接影响。普罗斯佩罗博士和他的同事将在马尔代夫的一个岛屿上，通过两年半的持续采样计划，开发一套关于INDOEX地区气溶胶的化学、物理和辐射特征的气候学数据集。随着这段时间内大气条件的预期范围，气溶胶的特性和种类的浓度也将有很大的变化。PI将试图将这些化学和物理变化与大气辐射特性的变化联系起来。

9612895 Prospero The Indian Ocean Experiment (INDOEX) is an international field experiment with participation from France, Germany, India, the Netherlands, and the United States. The main effort under the U.S. component focuses on assessing the role of sulfates and other continental aerosols in global radiative forcing and is being supported jointly by the Department of Energy and the National Science Foundation. In addition, complementary studies involving investigations of a variety of related chemical and radiative processes will be undertaken by scientists from other federal agencies and other international partners. The composite observing system consists of a wide range of platforms, from ships to aircraft, as well as surface-based and balloon measuring systems, and satellite data. The main part of the three year effort will be a four-month intensive field phase which begins January 1999. The ultimate goal of this program is to obtain a better understanding of the decadal and longer time scale climate forcing. The equatorial Indian Ocean during the northeast winter monsoon season provides a unique natural laboratory for this experiment. The experimental area is probably the only place in the world where an air mass which has been modified by intense sources of continental aerosols, anthropogenic trace species, and their reaction products (e.g., sulfates and ozone) from the northern hemisphere comes into contact with the pristine air of the southern hemisphere, which has been transported via cross equatorial monsoonal flow, at the Intertropical Convergence Zone. The juxtaposition of these two very distinct air masses will allow a thorough examination of both the direct and indirect effects of the aerosols on the radiative properties of the atmosphere. Dr. Prospero and colleagues will develop a climatological data set of the chemical, physical, and radiative characteristics of aerosols in the INDOEX region through a continuous sampling program over two and a half yea rs at an island site in the Maldives. With the expected range in atmospheric conditions over this time, the characteristics of and concentrations in species of aerosols will also vary greatly. The PIs will attempt to associate these chemical and physical variations with changes in atmospheric radiative properties.