| 南海夏季风撤退期的气候特征I——40年平均 |
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| 引用本文： | 冯瑞权,王安宇,梁建茵,林建恒,李江南,吴池胜.南海夏季风撤退期的气候特征I——40年平均[J].热带气象学报,2007,23(1):7-13. |
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| 作者姓名： | 冯瑞权 王安宇 梁建茵 林建恒 李江南 吴池胜 |
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| 作者单位： | 中国气象局广州热带海洋气象研究所，中国气象局广州热带海洋气象研究所，中国气象局广州热带海洋气象研究所，中国气象局广州热带海洋气象研究所，中国气象局广州热带海洋气象研究所，中山大学环境科学与工程学院大气科学系 广东广州510080，中山大学环境科学与工程学院大气科学系，广东广州510275，广东广州510080，广东广州510080，广东广州510080，广东广州510080，广东广州510275 |
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| 基金项目： | 国家重点基础研究发展计划(973计划);广东省自然科学基金;广东省科技攻关项目;广东省广州市应用基础研究项目 |
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| 摘 要： | 近年来广州地区的气溶胶污染日趋严重,灰霾天气主要出现在10月～次年4月。大气灰霾导致能见度恶化。自1980年代初开始,该地区的能见度急剧恶化,灰霾天气显著增加,其中有3次大的波动,分别代表广州地区经济发展相伴随的粉尘污染、硫酸盐加粉尘污染、光化学过程的细粒子加硫酸盐加粉尘的复合污染时期。雾和轻雾造成的低能见度的长期变化趋势,没有由于人类活动影响或经济发展影响带来的趋势性变化,其波动主要反映了气候波动固有的年际和年代际变化。广州地区能见度的恶化主要与细粒子有关,PM10有一半季均值超过国家二级标准的日均值浓度限值,而PM2.5季均值全部超过美国国家标准的日均值浓度限值,细粒子浓度甚高。另外PM2.5占PM10的比重非常高,可达62%～69%,尤其是旱季比雨季更高。
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| 关 键 词： | 广州地区 气溶胶云 灰霾天气 能见度恶化 细粒子污染 |
| 文章编号： | 1004-4965(2007)01-0001-06 |
| 收稿时间： | 2005/12/19 0:00:00 |
| 修稿时间： | 2005-07-18 |
STUDY ON THE VISIBILITY REDUCTION CAUSED BY ATMOSPHERIC HAZE IN GUANGZHOU AREA |
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| FONG Soi-kun,WANG An-yu,LIANG Jian-yin,LAM Kin-hang,LI Jiang-nan and WU Chi-sheng.STUDY ON THE VISIBILITY REDUCTION CAUSED BY ATMOSPHERIC HAZE IN GUANGZHOU AREA[J].Journal of Tropical Meteorology,2007,23(1):7-13. |
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| Authors: | FONG Soi-kun WANG An-yu LIANG Jian-yin LAM Kin-hang LI Jiang-nan and WU Chi-sheng |
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| Institution: | 1. Institute of Tropical and Marine Meteorology, CMA, Guangzhou 510080, China; 2. Department of Atmospheric Science, School of Environmental Science and Engineer, Sun Yai-sen University,Guangzhou 510275, China |
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| Abstract: | Analyses are made on climatic characteristics of the retreat of South China Sea(SCS) summer monsoon using the 40-year NCAR/NCEP data between 1958 and 1997.We believe that the Siberian cold air starts to pledge southwards in the first 10 days of August and,with the blocking effect of the Tibetan Plateau,the cold air progresses quickly in eastern China and continues to move to the south,resulting in the retreat of SCS summer monsoon.Among individual years,the earliest retreat happens in mid-August while the latest in mid-October,with a difference of two months.The retreat process and the onset process of SCS summer monsoon are quite different;both the South China Sea Summer Monsoon and the rain establish abruptly and cover almost the whole region,while the retreat process happens slowly from north to south in about one month.During the retreat,the rainfall pattern has little change;but after the retreat,the ITCZ rain replaces SCS summer monsoon rain,with the respective rain region following the south-moving Sun.The 30 to 60-day oscillations of SCS rainfall weaken obviously while the quasi-two-week oscillations are still active. |
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| Keywords: | Guangzhou area aerosol cloud haze weather visibility deterioration fine particles pollution |
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