Identification

Title

Evaluating the impact of emissions regulations on the emissions reduction during the 2015 China Victory Day Parade with an ensemble square root filter

Abstract

In order to guarantee good air quality for the 15th International Association of Athletics Federations World Championships (22-30 August) and the China Victory Day parade (3 September) in Beijing, a series of comprehensive emissions regulations were implemented in Beijing and the surrounding provinces from 20 August to 3 September 2015. During this period, the intensity of the emissions regulation was enhanced step by step in the run-up to the event. This period therefore allowed us to quantitatively estimate the reduction in emissions as a result of the emissions regulations under different intensity and strategy scenarios. The ensemble square root filter was employed to optimize the initial conditions and the emissions simultaneously. Numerical results showed that the variations of the anthropogenic emissions before, during, and after the emissions regulations were reasonably simulated. The updated emissions were about 80% and 50% of the prior anthropogenic emissions during the regular- and stringent-regulations periods, respectively. As a result, the PM2.5 concentrations consistently reduced during the regulations period, and the largest reduction occurred under the stringent-regulations period. Sensitivity simulations forced by the averaged emissions before the regulations and during the regular- and stringent-regulation periods further highlighted the valuable impacts of emissions regulations, under different strategy and intensity scenarios, on the improvement of air quality. More intense emissions regulation will lead to a greater reduction in PM2.5 concentrations.

Resource type

document

Resource locator

Unique resource identifier

code

http://n2t.net/ark:/85065/d7p271wr

codeSpace

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

geoscientificInformation

Keywords

Keyword set

keyword value

Text

originating controlled vocabulary

title

Resource Type

reference date

date type

publication

effective date

2016-01-01T00:00:00Z

Geographic location

West bounding longitude

East bounding longitude

North bounding latitude

South bounding latitude

Temporal reference

Temporal extent

Begin position

End position

Dataset reference date

date type

publication

effective date

2018-04-27T00:00:00Z

Frequency of update

Quality and validity

Lineage

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Limitations on public access

None

Responsible organisations

Responsible party

contact position

OpenSky Support

organisation name

UCAR/NCAR - Library

full postal address

PO Box 3000

Boulder

80307-3000

email address

opensky@ucar.edu

web address

http://opensky.ucar.edu/

name: homepage

responsible party role

pointOfContact

Metadata on metadata

Metadata point of contact