相关实验视频

Updated: Jul 20, 2025

Measuring Carbon Content in Airway Macrophages Exposed to Carbon-Containing Particulate Matters

Measuring Carbon Content in Airway Macrophages Exposed to Carbon-Containing Particulate Matters

Published on: July 12, 2024

在2020年COVID-19封锁控制下,北京空气污染物的周末影响在变化2020年COVID-19封锁控制下

Lingyun Wu¹, Junfei Xie², Keyu Kang³

¹State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029 China.

npj urban sustainability

|July 31, 2023

概括

由于COVID-19的封锁,北京的空气污染物每周周期发生了重大变化. 颗粒物 (PM2.5),二氧化 (NO2),二氧化硫 (SO2) 和臭氧 (O3) 的减少表明人类活动模式发生了变化.

科学领域:

环境科学环境科学
大气化学大气化学
公共卫生公共卫生

背景情况:

随着COVID-19大流行,全球各地实施了封锁,大大减少了人类活动和相关排放.
了解这些非药物干预对空气质量的影响对于环境政策至关重要.
北京是一个主要的城市中心,在2020年经历了活动的实质性变化.

研究的目的:

调查COVID-19封锁措施对北京主要空气污染物的每周循环的影响.
为了比较2020年的空气污染物每周循环与疫情前 (2018-2019) 的情况.
为了确定在封锁期间人类活动的变化是否影响了白天和周的排放模式.

主要方法:

对PM2.5,NO2,SO2,CO和O3度的每周周期的分析.
利用来自北京32个监测站的观测数据.
2020年的污染物数据与2018年和2019年的基线数据进行了比较.

主要成果:

2018年观察到PM2.5,NO2,SO2和CO的明显每周周期,2020年改变了周末效应.
与2018年 (29.60-69.26%) 和2019年 (4.49-47.21%) 相比,PM2.5,NO2,SO2和O3的每周周期大小在2020年显著下降.
周末每周周期大小的减少更为明显,这表明对典型的周末排放模式的影响更大.

结论:

北京的COVID-19封锁控制明显改变了主要空气污染物的每周循环.
封锁期间人类工作和生活方式模式的变化与减少人为排放密切相关,特别是在周末.
这些发现凸显了城市空气质量对人类活动的敏感性和减排战略的有效性.

关键词:

气候科学气候科学环境科学环境科学环境社会科学环境社会科学

更多相关视频

Quantification and Whole Genome Characterization of SARS-CoV-2 RNA in Wastewater and Air Samples

Quantification and Whole Genome Characterization of SARS-CoV-2 RNA in Wastewater and Air Samples

Published on: June 30, 2023

Setup of Consumer Wearable Devices for Exposure and Health Monitoring in Population Studies

Setup of Consumer Wearable Devices for Exposure and Health Monitoring in Population Studies

Published on: February 3, 2023

相关概念视频

Chronic Obstructive Pulmonary Disease-II: Pathophysiology

Chronic Obstructive Pulmonary Disease-II: Pathophysiology

Chronic Obstructive Pulmonary Disease (COPD) pathophysiology is intricate and multifaceted, involving a complex interplay of physiological processes. Understanding these mechanisms is crucial for effectively managing and treating COPD. Here is an in-depth look at the critical elements in the pathophysiology of COPD:
Chronic Inflammation

Factors Affecting Pulmonary Ventilation

Factors Affecting Pulmonary Ventilation

Besides the pressure difference between the external environment and the lungs, the airflow rate and ease of pulmonary ventilation are also influenced by three other factors: surface tension of the fluid in the alveoli, compliance of the lungs, and airway resistance.
Alveolar Surface Tension
The alveolar fluid lines the luminal surface of the alveoli and exerts a force called surface tension. This force is caused by the polar water molecules in the liquid being more strongly attracted to each...