| 周文利,向亚飞,祝海扬,巨秉中,王丽霞,马军.格尔木市低空逆温特征及其对空气污染物浓度的影响[J].沙漠与绿洲气象,2020,14(3):88~94 |
| 格尔木市低空逆温特征及其对空气污染物浓度的影响 |
| Characteristics of Temperature Inversion in Lower-air and its influence on concentration of air pollutants over Golmud |
| 投稿时间：2018-12-26 修订日期：2019-06-03 |
| DOI： |
| 中文关键词: 格尔木市 贴地逆温 悬浮逆温 气候区 空气污染物浓度 |
| 英文关键词:Golmud grounding inversion suspension inversion climate zone air pollutant concentration |
| 基金项目:青海省自然科学基金项目(2017-ZJ-944Q)资助。 |
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| 中文摘要: |
| 利用2015-2017年格尔木市L波段雷达探空站的探空资料，分析了格尔木市低空逆温的基本特征，并与不同气候区的西宁市、玉树市做了对比；结合2016-2017年格尔木市逐日空气污染物浓度（SO2、NO2、O3、PM2.5）资料，研究了低空逆温对空气污染物浓度的影响。结果表明：格尔木市年均逆温发生频率07时、19时分别为67%、24%，以贴地逆温为主，秋冬季发生频率高于春夏季；逆温厚度表现为早间高于晚间，冬季最厚、夏季最薄，07时各季节贴地逆温厚度高于悬浮逆温，19时秋冬季悬浮逆温厚度高于贴地逆温；逆温强度表现为贴地逆温大于悬浮逆温；07时悬浮逆温的起始高度和终止高度（分别为331m、571m）小于19时（分别为662m、851m），均在冬季达到最大；07时柴达木盆地逆温发生频率最高（67%）、强度最大（2.07℃/100m）、厚度最薄（267m），19时逆温发生频率少于河湟地区多于三江源地区（24%）、强度最小（2.18℃/100m）、厚度最厚（127m）；逆温对SO2、NO2、O3浓度有显著影响，对PM2.5的影响效果不明显。 |
| 英文摘要: |
| Based on the L-band radar data set from 2015 to 2017, this paper analyzed the characteristics of lower-air temperature inversion in Golmud and compared with Xining and Yushu which in different climate zones. Combined with the daily air pollutants concentration data (SO2, NO2, O3 and PM2.5) from 2016 to 2017 in Golmud, the impact of lower-air temperature inversion on the concentration of air pollutants was studied. The results showed that the annual average frequency of temperature inversion in Golmud was 67% at 07:00am and 24% at 19:00pm, mainly grounding inversion, the frequency in autumn and winter was higher than that in spring and summer. The thickness at 07:00am was much higher than at 19:00pm, and there was the thickest in winter, and the thinnest in summer. The thickness of the grounding inversion was higher than the suspension inversion at 07:00am of each season, the suspension inversion at 19:00pm in autumn and winter was higher than the grounding inversion. The intensity of the grounding inversion was stronger than the suspension inversion. The starting and ending height of suspension inversion at 07:00am (331m, 571m) were less than 19:00pm (662m, 851m), and reached the maximum in winter. At 07:00am, the Qaidam Basin had the highest frequency (67%), the strongest intensity (2.07℃/100m)and the thinnest thickness (267m). At 19:00pm, the frequency of the Qaidam Basin was less than the Hehuang area and more than the Three-River Source area (24%), the intensity was smallest (2.18℃/100m), and the thickness was thickest (127m). The temperature inversion had a significant effect on the SO2, NO2 and O3, and the unsignificant effect on PM2.5. |
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