...
首页> 外文期刊>Geophysical Research Letters >Decreasing trends in sunshine duration over China for 1954-1998: Indication of increased haze pollution? - art. no. 2042
【24h】

Decreasing trends in sunshine duration over China for 1954-1998: Indication of increased haze pollution? - art. no. 2042

机译:1954-1998年中国日照时间的减少趋势:雾霾污染增加的征兆? - 艺术。没有。 2042

获取原文
获取原文并翻译 | 示例
           

摘要

Analysis of meteorological data made available by the China Meteorological Administration (CMA) reveals significant decreases in sunshine duration over the latter half of the 20th century over much of China, especially in the eastern half of the country. Most of the decrease has occurred since about 1980, and appears to be related to large increases in atmospheric anthropogenic aerosol loading that have increased the aerosol extinction coefficient (AEC), as calculated from observations of (decreasing) visual range. A finding of particular interest is a significant decrease in summertime maximum temperature over this time period for a large portion of southeastern China near the Sichuan Basin (while the rest of China- and indeed most of the northern hemisphere-has warmed). This same region of southeastern China shows the largest decreases in sunshine duration and largest increases in AEC. The consistent spatial and temporal patterns of change in these variables seem to support the theory that aerosol loading has decreased the duration and intensity of sunshine in this region and thus lowered summertime maximum temperatures. [References: 23]
机译:对中国气象局(CMA)提供的气象数据的分析表明,在20世纪下半叶,中国大部分地区,特别是在该国东部,日照持续时间明显减少。减少的大部分时间是在1980年左右开始发生的,这似乎与大气人为气溶胶负荷的大量增加有关,这增加了气溶胶的消光系数(AEC),这是根据(减小的)视觉范围的观测结果得出的。特别令人感兴趣的发现是,在这段时间内,中国东南部靠近四川盆地的大部分地区,夏季最高温度显着下降(而中国其他地区,乃至北半球的大部分地区,都在变暖)。在中国东南部的同一地区,日照持续时间的减少最大,而日增幅最大。这些变量变化的一致的时空格局似乎支持以下理论:气溶胶加载已减少了该区域日照的持续时间和强度,从而降低了夏季最高温度。 [参考:23]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号