Please wait, while we are loading the content...
Please wait, while we are loading the content...
| Content Provider | Directory of Open Access Journals (DOAJ) |
|---|---|
| Author | Ahmad Hasnain Muhammad Zaffar Hashmi Uzair Aslam Bhatti Basit Nadeem Geng Wei Yong Zha Yehua Sheng |
| Abstract | A unique illness, the coronavirus disease 2019 (COVID-19), emerged in Wuhan, People's Republic of China, in December 2019. To reduce the spread of the virus, strict lockdown policies and control measures were put in place all over the world. Due to these enforced limitations, a drastic drop in air pollution and an improvement in air quality were observed. The present study used six air pollutants $(PM_{10}$, $PM_{2.5}$, $SO_{2}$, $NO_{2}$, CO and $O_{3}$) to observe trends before, during and after the COVID-19 lockdown period in Nanjing, China. The data were divided into six phases: P1–P3, pre-lockdown (1 October–31 December 2019), lockdown (1 January–31 March 2020), after lockdown (1 April–30 June 2020), P4–P6: the same dates as the lockdown but during 2017, 2018 and 2019. The results indicate that compared with the pre-lockdown phase, the $PM_{10}$ and $PM_{2.5}$ average concentrations decreased by –27.71% and –5.09%. Compared with the previous three years, 2017–2019, the reductions in $PM_{10}$ and $PM_{2.5}$ were –37.99% and –33.56%, respectively. Among other pollutants, concentrations of $SO_{2}$ (–32.90%), $NO_{2}$ (–34.66%) and CO (–16.85%) also decreased during the lockdown, while the concentration of $O_{3}$ increased by approximately 25.45%. Moreover, compared with the pre- and during lockdown phases, $PM_{10}$, $PM_{2.5}$ and $NO_{2}$ showed decreasing trends while $SO_{2}$, CO and $O_{3}$ concentrations increased. These findings present a road map for upcoming studies and provide a new path for policymakers to create policies to improve air quality. |
| e-ISSN | 20734433 |
| DOI | 10.3390/atmos12060743 |
| Journal | Atmosphere |
| Issue Number | 743 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI AG |
| Publisher Date | 2021-01-01 |
| Publisher Place | Switzerland |
| Access Restriction | Open |
| Subject Keyword | Meteorology. Climatology Covid-19 Lockdown Air Pollution Air Quality Improvement Nanjing China |
| Content Type | Text |
| Resource Type | Article |
National Digital Library of India (NDLI) is a virtual repository of learning resources which is not just a repository with search/browse facilities but provides a host of services for the learner community. It is sponsored and mentored by Ministry of Education, Government of India, through its National Mission on Education through Information and Communication Technology (NMEICT). Filtered and federated searching is employed to facilitate focused searching so that learners can find the right resource with least effort and in minimum time. NDLI provides user group-specific services such as Examination Preparatory for School and College students and job aspirants. Services for Researchers and general learners are also provided. NDLI is designed to hold content of any language and provides interface support for 10 most widely used Indian languages. It is built to provide support for all academic levels including researchers and life-long learners, all disciplines, all popular forms of access devices and differently-abled learners. It is designed to enable people to learn and prepare from best practices from all over the world and to facilitate researchers to perform inter-linked exploration from multiple sources. It is developed, operated and maintained from Indian Institute of Technology Kharagpur.
Learn more about this project from here.
NDLI is a conglomeration of freely available or institutionally contributed or donated or publisher managed contents. Almost all these contents are hosted and accessed from respective sources. The responsibility for authenticity, relevance, completeness, accuracy, reliability and suitability of these contents rests with the respective organization and NDLI has no responsibility or liability for these. Every effort is made to keep the NDLI portal up and running smoothly unless there are some unavoidable technical issues.
Ministry of Education, through its National Mission on Education through Information and Communication Technology (NMEICT), has sponsored and funded the National Digital Library of India (NDLI) project.
| Sl. | Authority | Responsibilities | Communication Details |
|---|---|---|---|
| 1 | Ministry of Education (GoI), Department of Higher Education |
Sanctioning Authority | https://www.education.gov.in/ict-initiatives |
| 2 | Indian Institute of Technology Kharagpur | Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project | https://www.iitkgp.ac.in |
| 3 | National Digital Library of India Office, Indian Institute of Technology Kharagpur | The administrative and infrastructural headquarters of the project | Dr. B. Sutradhar bsutra@ndl.gov.in |
| 4 | Project PI / Joint PI | Principal Investigator and Joint Principal Investigators of the project |
Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon |
| 5 | Website/Portal (Helpdesk) | Queries regarding NDLI and its services | support@ndl.gov.in |
| 6 | Contents and Copyright Issues | Queries related to content curation and copyright issues | content@ndl.gov.in |
| 7 | National Digital Library of India Club (NDLI Club) | Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach | clubsupport@ndl.gov.in |
| 8 | Digital Preservation Centre (DPC) | Assistance with digitizing and archiving copyright-free printed books | dpc@ndl.gov.in |
| 9 | IDR Setup or Support | Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops | idr@ndl.gov.in |
|
Loading...
|