Identification

Title

An integrated analysis of ozone and carbon monoxide over the western Pacific using satellite and aircraft measurements during the ACCLIP summer campaign 2022

Abstract

The western Pacific exhibited a complex interplay of monsoonal dynamics and transport during the Asian Summer Monsoon Chemical & Climate Impact Project (ACCLIP) airborne field campaign in summer 2022. We analyze in situ observations of ozone (O 3 ) and carbon monoxide (CO) from 29 research flights—profiling over South Korea and cruising over the western Pacific —and balloon soundings in South Korea and Taiwan. In the upper troposphere (UT), a twofold enhancement in CO was observed across the mid‐latitudes of the western Pacific, driven by large‐scale uplift and outflow associated with the Asian Summer Monsoon (ASM) system. Observational evidence of enhanced UT O 3 in conjunction with its primary precursor, nitrogen dioxide (NO 2 ), was also presented. Satellite observations from the TROPOspheric Monitoring Instrument (TROPOMI) and Microwave Limb Sounder (MLS) were integrated with two selected flight cases to explore transport events and to provide broader spatial context. On July 31, the ASM anticyclone manifested in two distinct modes, South Asia High (SAH) and Western Pacific High (WPH). The SAH was filled with polluted air masses uplifted from the Asian boundary layer while the WPH was sustained by deep maritime convection. Both flight and satellite data captured polluted air parcels over the tropical western Pacific that had detached from the “main” anticyclonic eddy. By examining the case on August 6, we observed that the western Pacific was strongly modulated by low‐level westerlies and the eastward extension of the ASM anticyclone and isentropic mixing near the tropopause.

Resource type

document

Resource locator

Unique resource identifier

code

https://n2t.net/ark:/85065/d7r78kpd

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

2025-06-28T00:00:00Z

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

<span style="font-family:Arial;font-size:10pt;font-style:normal;" data-sheets-root="1">Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.</span>

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