海南岛北部地区酸雨的天气影响因素及污染源分析

Contributing Weather Conditions and Pollutant Sources of Acid Rain in Northern Hainan Province

根据2005年7月—2006年12月海口市发生的19个酸雨个例,对海南岛北部地区酸雨发生的天气背景、致酸物的源地及输送方式进行了天气学分析.结果表明:海南岛北部地区酸雨的发生无明显季节性;影响海南岛北部地区酸雨形成的天气系统主要有6种,其中冷空气偏东型及热带气旋型2类天气系统产生的酸雨次数最多;致酸物多属远距离输送所致,主要来源于华南地区,部分来源于越南,海南岛本地污染物导致酸雨的个例很少.海南岛北部地区酸雨的形成不仅与气象条件有关,而且与海南岛的地形地貌有关.

Based on observed acid rain data from 19 cases in Haikou during July 2005 to December 2006, the background weather of acid rain days in the northern region of Hainan and the source and transport mode of acid-causing pollutants were analyzed in this paper. The analysis showed that acid rain occurred with no seasonal characteristics, and there were mainly six kinds of synoptic systems influencing the occurrence of acid rain in the northern region of Hainan. Most acid-causing pollutants came from long-distance transport, mainly from southern China, some from Vietnam, and a little due to local pollution. Additionally, the formation of acid rain relates not only to meteorological conditions, but also to the topography of Hainan Island.