成都28日启动重污染天气黄色预警 车辆限行有变 中新网成都11月27日电 (记者 张浪)记者27日从成都市生态环境局获悉，根据省级生态环境和气象部门 空气质量联合会商意见，预计2025年11月28日起盆地大部气象条件转差，成都平原、川南及川东北部分 城市有颗粒物轻度至中度污染风险。按照省生态环境保护和督察工作领导小组办公室启动重污染天气预 警和联防联控的要求，以及《成都市重污染天气应急预案(2024年修订)》相关规定，成都市决定于2025 年11月28日零时启动重污染天气黄色预警。 此次预警期间，四川盆地有受源自蒙古国西南部的沙尘气团传输影响风险，川东北及成都平原偏北城市 可能出现PM10小时轻度至中度污染。后续冷空气强度及路径存在不确定性，"成都生态环境"官方微信 公众号将持续跟踪更新。 此外，在机动车限行方面，在工作日6:00至22:00时段内，禁止在四环路(成都绕城高速公路，不含)环线 内区域通行的车辆包括：初次注册登记日期在2007年1月1日(不含)以前的国三排放标准的汽油车；国三 及以下排放标准的柴油车；国四排放标准的柴油货车(特殊车辆除外)；其他车辆(含临时号牌车辆)按机 动车号牌最后一位阿拉伯数 ...

Core Viewpoint - The PM2.5 pollution in the Beijing-Tianjin-Hebei region and surrounding areas has intensified since October 23, with a significant increase in pollution levels due to high emissions and adverse meteorological conditions [1][2][3]. Group 1: Pollution Trends - The region experienced a transition from "good air quality" to the first regional PM2.5 pollution event of the autumn-winter season, with PM2.5 concentrations peaking at 123 micrograms per cubic meter in Baoding on October 25 [2][5]. - The pollution spread from northern Henan to cities along the Taihang Mountains, with Baoding and Langfang reaching moderate pollution levels [2][3]. - As of October 28, the hourly PM2.5 concentration in Hebi reached 174 micrograms per cubic meter, indicating severe pollution [2][3]. Group 2: Causes of Pollution - High levels of regional pollution emissions have been maintained, with heavy-duty truck traffic increasing by 6% compared to the previous year, and 253 fire points detected in the region [3][4]. - The composition of PM2.5 during high pollution periods showed that over 40% was nitrate, indicating that industrial and diesel vehicle emissions are significant contributors [3][4]. Group 3: Meteorological Conditions - Adverse meteorological conditions, including stagnant air, high humidity, and temperature inversions, have exacerbated pollution levels, leading to a "cumulative - brief relief - intensification" pattern [4][5]. - The region experienced weak southerly winds and high relative humidity, which contributed to the accumulation of pollutants [4][5]. Group 4: Future Outlook - Air quality is expected to gradually improve starting October 30, with cities in the region implementing pollution alerts and control measures [5][6]. - The forecast indicates that from October 30 to November 2, air quality will improve to good levels due to the influence of cold air [6].