Identification

Title

Global and regional effects of the photochemistry of CH₃O₂NO₂: Evidence from ARCTAS

Abstract

Using measurements from the NASA Arctic Research of the Composition of the Troposphere from Aircraft and Satellites (ARCTAS) experiment, we show that methyl peroxy nitrate (CH₃O₂NO₂) is present in concentrations of ~5 - 15 pptv in the springtime arctic upper troposphere. We investigate the regional and global effects of CH₃O₂NO₂ by including its chemistry in the GEOS-Chem 3-D global chemical transport model. We find that at temperatures below 240 K inclusion of CH₃O₂NO₂ chemistry results in decreases of up to ~20 % in NOx, ~20 % in N2O5, ~5 % in HNO₃, ~2 % in ozone, and increases in methyl hydrogen peroxide of up to ~14 %. Larger changes are observed in biomass burning plumes lofted to high altitude. Additionally, by sequestering NOx at low temperatures, CH₃O₂NO₂ decreases the cycling of HO₃ to OH, resulting in a larger upper tropospheric HO₃ to OH ratio. These results may impact some estimates of lightning NOx; sources as well as help explain differences between models and measurements of upper tropospheric composition.

Resource type

document

Resource locator

Unique resource identifier

code

https://n2t.org/ark:/85065/d7b858nq

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

2011-05-06T00:00:00Z

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