About Careers MedBlog Contact us
Medindia LOGIN REGISTER
Advertisement

Understanding the Mechanism of Heavy Air Pollution in Beijing

by Dr. Trupti Shirole on January 9, 2017 at 11:13 PM
Font : A-A+

 Understanding the Mechanism of Heavy Air Pollution in Beijing

Beijing has for many years suffered from serious air pollution. The Chinese capital's latest smog alert has dragged on into the first week of 2017.

In fact, the joint prevention and control policy for atmospheric pollution in the Beijing-Tianjin-Hebei region was announced after the heavy haze event occurred on 1 January 2013. But it is still uncertain about what or where to control and prevent in detail.

Advertisement


The research group led by WANG Yuesi from the Institute of Atmospheric Physics (IAP) has monitored the evolution of regional atmospheric mixing layer height (MLH) and attenuated backscattering coefficient in the Beijing-Tianjin-Hebei region for years. Combined with the particle's chemical component online analysis, some highlighted results about the regional heavy haze formation mechanism are obtained.

"Beijing is located to the north of the North China Plain. During the initial polluted period, it is affected by southerly transport at the latitude of 500-1000 m." WANG find, "Once the pollution is formed, the MLH will decrease quickly to 500m even lower and increase the pollutant concentration rapidly with compression mechanism. Meanwhile, the hygroscopic growth and heterogeneous chemical processes enhancement under the circumstance of high relative humidity will facilitate the explosive growth of secondary particulate matters."
Advertisement

The co-existence of those factors can further exacerbate the pollution degree. At this time, although the impact of regional transport is less important, the local emitted (such as motor vehicles) pollutants are unable to diffuse, thus will result in a consistent increase of the pollutant concentrations in the MLH.

The heavy haze formation in Beijing is therefore depicted as "initiate by the regional transport mainly from the coal burning in surrounding areas, and intensified by the local secondary formation originated from the motor vehicles". This conclusion is presented in papers written by TANG Guiqian, LIU Zirui, WANG Lili, HU Bo, XIN Jinyuan and ZHU Xiaowan and is confirmed consistently by some new experimental researches.

According to these researches, suggestions are proposed to the environmental protection administration: Pre-warning should be implemented two or three days ahead of the heavy haze coming, and the regional stationary emissions especially the elevated sources should be controlled and reduced in advance. Once the pollution formed, the local emissions should be controlled, thus the peak values of contaminant can be efficiently restrained.

Source: Eurekalert
Advertisement

Advertisement
News A-Z
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
What's New on Medindia
World Disability Day 2022 - The Role of Innovative Transformation
Diet and Oral Health: The Sugary Connection May Become Sour
World AIDS Day 2022 - Equalize!
View all
Recommended Reading
News Archive
Date
Category
Advertisement
News Category

Medindia Newsletters Subscribe to our Free Newsletters!
Terms & Conditions and Privacy Policy.

More News on:
Pollution Air Pollution Breathing Dirty Air may Lead to Kidney Failure 

Most Popular on Medindia

Nutam (400mg) (Piracetam) Daily Calorie Requirements How to Reduce School Bag Weight - Simple Tips Vent Forte (Theophylline) Selfie Addiction Calculator Diaphragmatic Hernia The Essence of Yoga Blood Donation - Recipients Find a Hospital Calculate Ideal Weight for Infants
This site uses cookies to deliver our services.By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Use  Ok, Got it. Close
×

Understanding the Mechanism of Heavy Air Pollution in Beijing Personalised Printable Document (PDF)

Please complete this form and we'll send you a personalised information that is requested

You may use this for your own reference or forward it to your friends.

Please use the information prudently. If you are not a medical doctor please remember to consult your healthcare provider as this information is not a substitute for professional advice.

Name *

Email Address *

Country *

Areas of Interests