Identification

Title

Effect of nitryl chloride chemistry on air quality in South Korea during the KORUS-AQ campaign

Abstract

Nitryl chloride (ClNO2) can play an important role in determining ozone and particulate matter (PM) chemistry as a nighttime reservoir of NOX and a source of chlorine radical (Cl BULL; ) in the daytime in polluted environments. We present a quantitative evaluation of the impact of tropospheric ClNO2 chemistry on air quality in South Korea using extensive observations during the Korea-United States Air Quality (KORUS-AQ) field study and a 3-D chemical transport model (CTM). We first estimated anthropogenic emissions of reactive chlorine in South Korea to implement it along with the latest Chinese emissions in the model. A comparison between the simulated and observed ClNO2 concentrations during the KORUS-AQ campaign shows that the model captures the observed spatial and temporal variations, including local and transboundary transport of ClNO2 and its precursors. The model simulation highlights that ClNO2 plays a significant role in nighttime NOX chemistry by efficiently converting NO to NO2. In addition, it causes a noticeable acceleration of the NOX-O3 cycle. When averaged over the campaign, adding ClNO2 chemistry into the model leads to an increase of O3 (1.1%), NOX (3.1%), BULL; OH (2.0%), HO2 BULL; (0.8%), and Cl BULL; (507.8%) and a decrease of TNO3 (HNO3 + aerosol nitrate, 1.7%).

Resource type

document

Resource locator

Unique resource identifier

code

https://n2t.org/ark:/85065/d7dz0dbz

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

2023-11-01T00:00:00Z

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