沙尘天气成因
Search documents
中国北方多城沙尘重度污染 专家解析成因
Xin Lang Cai Jing· 2026-02-22 07:37
中国环境监测总站监测显示,22日10时,石家庄、洛阳、安阳、鹤壁等多地空气质量出现重度及以上程 度污染。 分析本次沙尘天气成因,专家认为,一是近期沙源地降水量明显偏少。监测数据显示,蒙古国南部和中 蒙交界地区降水量相较于常年平均偏少50%以上,地表干燥疏松,为沙尘天气提供了充足原料。二是本 次冷空气强度较大。气象实况数据显示,西伯利亚冷高压叠加蒙古气旋,中国北方地区出现8级以上大 风,内蒙古中西部和山西北部局部出现11至12级大风。大风卷起沙尘的同时,将沙尘向东南方向传输, 形成大范围沙尘天气。 中新社北京2月22日电 (记者 阮煜琳)中国北方部分地区继续沙尘污染过程。监测显示,22日10时,银 川、徐州、运城等多个城市空气质量指数达到或超过500,出现爆表。 2月20日,受大风天气影响,蒙古国南部和中蒙交界地区起沙,中国北方地区大部出现沙尘天气,多地 出现可吸入颗粒物(PM10)短时重污染。中国国家大气污染防治攻关联合中心密切关注本次沙尘天气影 响,解读空气质量状况与发展趋势。 受沙尘天气影响,截至2月21日18时,中国北方地区55个地级及以上城市PM10浓度达到短时重度或严重 污染水平,其中内蒙古乌海、巴 ...
中国北方多城沙尘重度污染, 专家解析成因
Xin Lang Cai Jing· 2026-02-22 07:36
分析本次沙尘天气成因,专家认为,一是近期沙源地降水量明显偏少。监测数据显示,蒙古国南部和中 蒙交界地区降水量相较于常年平均偏少50%以上,地表干燥疏松,为沙尘天气提供了充足原料。二是本 次冷空气强度较大。气象实况数据显示,西伯利亚冷高压叠加蒙古气旋,中国北方地区出现8级以上大 风,内蒙古中西部和山西北部局部出现11至12级大风。大风卷起沙尘的同时,将沙尘向东南方向传输, 形成大范围沙尘天气。 专家表示,22日,受沙尘天气及传输影响,中国北方地区可能出现短时重度及以上污染。本轮沙尘天气 对中国中东部地区的影响预计于22日夜间基本结束。 中国北方部分地区继续沙尘污染过程。监测显示,22日10时,银川、徐州、运城等多个城市空气质量指 数达到或超过500,出现爆表。 2月20日,受大风天气影响,蒙古国南部和中蒙交界地区起沙,中国北方地区大部出现沙尘天气,多地 出现可吸入颗粒物(PM10)短时重污染。中国国家大气污染防治攻关联合中心密切关注本次沙尘天气影 响,解读空气质量状况与发展趋势。 受沙尘天气影响,截至2月21日18时,中国北方地区55个地级及以上城市PM10浓度达到短时重度或严重 污染水平,其中内蒙古乌海、巴彦 ...
专家解读本次沙尘天气从何而来
Xin Lang Cai Jing· 2026-02-21 15:13
【#专家解读本次沙尘天气从何而来#】21日上午,沙尘经由陕西北部进入河北西北部。21日下午,沙尘 前锋途经北京、天津后抵达河北东北部。大气污染防治攻关联合中心表示,此次沙尘天气的成因有两方 面,一方面是近期沙源地降水量明显偏少。气候监测数据显示,蒙古国南部和中蒙交界地区降水量相较 于常年平均(1991—2020年)偏少50%以上,地表干燥疏松,为沙尘天气提供了充足原料。另一方面原 因,是本次冷空气强度较大。气象实况数据显示,西伯利亚冷高压叠加蒙古气旋,北方地区出现8级以 上大风,内蒙古中西部和山西北部局部出现11至12级大风。大风卷起沙尘的同时,将沙尘向东南方向传 输,形成大范围沙尘天气。(@北京日报 记者 骆倩雯 视频内容为此前报道) ...
1月出现沙尘天气并不罕见 专家分析为何较常年偏早
Xin Lang Cai Jing· 2026-01-27 08:30
来源:央视新闻客户端 最近几天,青海、甘肃多地出现沙尘暴天气,部分地区能见度不足百米。据气象部门统计,今年我国北方地区首场沙尘天气出现在1月8日,而常年首场天气 发生时间是2月14日,偏早了36天。原因是什么?专家作出了分析。 沙源地干燥疏松、冷空气助力是主因 中央气象台首席预报员饶晓琴介绍,这主要有两方面原因: 首先,1月以来我国西北沙源区基本无降水、地表无积雪覆盖;加之沙源区气温较常年同期偏高1℃至4℃,不利于地表冻结,导致地表干燥疏松,为沙源区 起沙提供了物质条件。 另一方面,统计显示,我国在冬季的1月出现沙尘天气并不罕见,像2021年、2023年的1月,我国北方也都有沙尘天气发生。虽然近年来1月沙尘频次偏多, 但整体强度在减弱,主要是扬沙过程,并且沙尘影响范围也主要集中在西北地区,不像春季沙尘天气往往影响范围会更广。 另一个原因就是1月影响我国的冷暖气团交替频繁,冷空气、寒潮天气时有发生,为起沙提供了动力条件。1月的几次沙尘过程都伴随地面冷锋活动,当冷空 气过境且恰好经过西北沙源地时,大风天气就极易扬起沙尘。 据专家介绍,今年1月的沙尘天气主要来源是我国新疆的塔克拉玛干沙漠和内蒙古的巴丹吉林沙漠、腾格 ...
造成今年沙尘天气较多的原因有哪些?生态环境部解读
Zhong Guo Xin Wen Wang· 2025-05-27 07:56
Core Insights - The Ministry of Ecology and Environment reported a significant increase in sandstorm days in China, with 2060 days recorded from January to April, an increase of 497 days compared to the previous year [1][2] - The main causes of the increased sandstorms include reduced precipitation, higher temperatures, and strong winds, with April experiencing a 43.5% decrease in rainfall compared to the same month last year [1] - The impact of sandstorms on air quality has been substantial, with a 5.1 percentage point loss in the proportion of good air quality days, and a 1.2 percentage point increase in heavy pollution days compared to the previous year [2] Environmental Impact - The proportion of good air quality days in China from January to April was 84.3%, while heavy pollution days accounted for 1.9% [2] - The sandstorm conditions are expected to improve with the onset of summer winds, which will reduce the long-distance transmission of sand and increase precipitation, thereby enhancing the ground's ability to retain sand [2] Future Outlook - The Ministry of Ecology and Environment is committed to implementing pollution control measures to improve air quality, emphasizing the need for both natural and human efforts in combating air pollution [2]
新闻分析:为何沙尘天气近期频频“返场”?
Xin Hua She· 2025-05-13 22:00
Core Viewpoint - The frequency of dust storms in Northwest China, particularly in regions like Xinjiang, Inner Mongolia, and Gansu, has increased this spring, raising public concern about the normalcy and causes of such weather patterns [2][5]. Group 1: Causes of Dust Storms - The frequent cold air activity this spring has contributed to the increased occurrence of dust storms, with Gansu experiencing the highest number of cold wave events in nearly 30 years, totaling 193 occurrences by mid-April [2][5]. - Enhanced wind speeds at various altitudes have created conditions favorable for dust storms, with wind speeds at 12,000 meters and 5,000 meters above ground level exceeding historical averages by 2 to 8 meters per second and 1 to 6 meters per second, respectively [3]. - Local soil conditions have worsened due to below-average precipitation and warming trends, leading to drier soil that is more susceptible to dust lifting [3][5]. Group 2: Trends and Future Outlook - Despite the current increase in dust storms, long-term trends indicate a decrease in the frequency of such events over the past 50 years [5]. - The potential for strong dust storms is expected to rise from April to May due to rapid temperature increases and dry conditions in the Northwest, which can lead to severe convective weather [5]. - Recent years have seen dust storms occurring more frequently in summer and autumn, attributed to global climate change and its impact on weather patterns [5]. Group 3: Mitigation Efforts - Long-term efforts in desertification prevention have shown positive results in improving the environment of dust source areas, which can help reduce the frequency of dust storms [6].