CLOUD-AEROSOL INTERACTION AND ITS INFLUENCES ON THE SURFACE RADIATION BUDGETS IN EAST ASIA.

云-气溶胶相互作用及其对东亚表面辐射预算的影响。

基本信息

批准号：
16030215
负责人：
HAYASAKA Tadahiro
金额：
$ 2.56万
依托单位：
RESEARCH INSTITUTE FOR HUMANITY AND NATURE
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research on Priority Areas
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2005
项目状态：
已结题

项目摘要

In the present study, the comparison and analysis of surface shortwave irradiance over China were carried out by using pyranometer data, satellite-derived data, and parameterized data with meteorological factors. The new quality control method was developed to check the pyranometer data obtained for the past several decades. The application of the quality control method showed that the pyranometer data used in this study, which were obtained by the Chinese Meteorological Administration, were reliable for long-term trend analysis. The comparison of the pyranometer data with the satellite-derived data such as ISCCP-FD and GEWEX-SRB indicated systematic bias particularly in the urban and desert areas. It is suggested from radiative transfer calculations that the bias is ascribed to aerosols in the satellite-derived data even under the cloudy sky conditions.The surface shortwave irradiance pyranometer data analysis suggested a decreasing trend for the period 1960-1990. The decreasing trend may be ascribed to changes in optical thickness of aerosols and that of clouds while the cloud amount was decreasing in this period. It is also suggested that the surface shortwave irradiance appears to change from decrease to increase around 1990. It is consistent with the previous studies for the North America and Europe, that is, so-called "global dimming and brightening" phenomena. The study on this matter will be more important in the future climate studies.

在本研究中，通过使用卫星衍生的数据以及具有气象因素的参数化数据，对中国的表面短波辐照度进行了比较和分析。开发了新的质量控制方法来检查过去几十年获得的金字化计数据。质量控制方法的应用表明，这项研究中使用的金字计计数据是由中国气象管理获得的，可用于长期趋势分析。将金字化计数据与卫星衍生的数据（例如ISCCP-FD和GEWEX-SRB）进行比较表明有系统的偏见，尤其是在城市和沙漠地区。从辐射转移计算中提出的，即使在云层的天空条件下，偏差也归因于卫星衍生数据中的气溶胶。表面短波辐照度金色计数据分析表明，1960 - 1990年期间的趋势下降。降低的趋势可能归因于气溶胶的光学厚度的变化和云的变化，而在此期间，云量正在减少。还提出，表面短波辐照度似乎从减少到1990年左右变化。这与先前对北美和欧洲的研究一致，即所谓的“全球变型和增强”现象。关于此问题的研究将在未来的气候研究中更为重要。