• 关键词：珠江三角洲  OMI卫星  土地利用类型  臭氧生成敏感性

• 基金项目：国家自然科学基金（No.41605092）；国家重点研发计划项目（No.2017YFC0212801）

• 庄立跃
• 华南理工大学环境与能源学院, 广州 510006

• 陈瑜萍
• 华南理工大学环境与能源学院, 广州 510006

• 范丽雅
• 1. 华南理工大学环境与能源学院, 广州 510006;2. 广东省大气环境与污染控制重点实验室, 广州 510006;3. 挥发性有机物污染治理技术与装备国家工程实验室, 广州 510006

• 叶代启
• 1. 华南理工大学环境与能源学院, 广州 510006;2. 广东省大气环境与污染控制重点实验室, 广州 510006;3. 挥发性有机物污染治理技术与装备国家工程实验室, 广州 510006

• 摘要：基于OMI卫星数据和MODIS土地覆盖分类产品，研究了珠江三角洲地区2005-2016年不同土地利用类型臭氧敏感性的时空变化特征.结果表明，采用MODIS数据产品建立的土地利用类型（发达区、较发达区和欠发达区）具有一定的科学性和适用性.臭氧生成受到VOCs控制的地区主要集中在珠三角中部，包括广州南部、佛山、中山、深圳和江门的部分地区，其面积占比不断缩小，在2015年达到最低值5.05%，2016年有所回升.受到NO_x控制的地区主要分布在珠三角边缘地带，包括惠州东北部、广州北部、肇庆西北部和江门西南部，其面积不断增大，在2016年达到最大面积占比42.60%.协同控制区集中在这两种控制区之间.分析不同土地利用类型的敏感性，结果发现，发达区主要为VOCs/协同控制区，较发达区主要为协同控制区，欠发达区为NO_x控制区.根据不同城市臭氧控制区面积占比的年际变化，可将珠三角9个城市分为3类：第1类以广州为代表，其面积较大，土地利用类型丰富，3种臭氧控制区均有出现；第2类以深圳为代表，集中在珠三角中心区，仅有VOCs控制/协同控制两种控制区；第3类只有惠州，仅有NO_x/协同控制两种控制区.

• Abstract：Based on OMI satellite data and MODIS land cover type products, the temporal and spatial variations of ozone formation sensitivity on different land use types in the Pearl River Delta from 2005 to 2016 were studied. The results show that the land use types (developed, comparatively developed and less-developed areas) established by using MODIS data products were scientific and applicable. The areas where surface ozone is controlled by VOCs-limited regime are mainly located in the central part of the Pearl River Delta, including southern Guangzhou, Foshan, Zhongshan, Shenzhen and parts of Jiangmen. The area proportion of VOCs-limited area has been shrinking, reaching a minimum of 5.05% in 2015, and rose again in 2016. The areas controlled by NO_x-limited regime were mainly distributed on the edge of the Pearl River Delta, including northeastern Huizhou, northern Guangzhou, northwestern Zhaoqing and southwestern Jiangmen. The area proportion of NO_x-limited area is increasing, reaching a maximum of 42.60% in 2016. The transitional regime area is mainly distributed between VOCs-limited and NO_x-limited areas. The ozone sensitivity regimes on different land use types were also analyzed. The results show that the developed areas were mainly under VOCs-limited/transitional regimes; the comparatively developed areas were mainly under transitional regime; the less developed areas were controlled by NO_x. According to the interannual variations of the area proportion of ozone sensitivity regimes in different cities, nine cities in the Pearl River Delta can be divided into three categories:the first category, represented by Guangzhou, has a large area and multiple land use types with three ozone sensitivity regimes emerged. The second category, represented by Shenzhen, is concentrated in the central area of the Pearl River Delta with only VOCs/transitional regimes. The third category only consists of Huizhou, with only NO_x/transitional regimes.

• Key words：Pearl River Delta  ozone monitoring instrument (OMI)  land use type  ozone sensitivity

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