Identification

Title

Recent decreasing trends in surface PM2.5 over East Asia in the winter-spring season: Different responses to emissions and meteorology between upwind and downwind regions

Abstract

This study developed and evaluated a WRF-Chem modeling system that reflects the effect of recent emission regulations on the PM2.5 above East Asia by utilizing an updated anthropogenic emission inventory for 2013-2018. This system accurately reproduced the monthly means, daily variations, and vertical profiles of PM2.5 during winter and spring over the Seoul Metropolitan Area (SMA) in South Korea and the North China Plain (NCP) and Yangtze River Delta (YRD) in China. Furthermore, it demonstrated that the decline in PM2.5 over the latter nation is attributable to control measures in China that have been in effect since 2013. The most polluted of the three target regions, the NCP, which is also upwind (in contrast to the downwind YRD and SMA), exhibited the largest decrease due to emission reduction. For example, the simulated mean PM2.5 concentration for February dropped by 39% over the NCP but by merely 17% over the YRD between 2013 and 2018. Additionally, the SMA displayed only minor changes in the concentration during winter and a weak decreasing trend during spring.

Resource type

document

Resource locator

Unique resource identifier

code

http://n2t.net/ark:/85065/d7tm7fj0

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

2021-06-01T00:00:00Z

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