Identification

Title

Unusual variation in nitric oxide radiative flux and neutral density over Hunga‐Tonga region caused by the volcanic eruption

Abstract

Large‐scale volcanic eruptions, such as the Hunga‐Tonga volcanic eruption that occurred in 2022, can impact the atmospheric structure and dynamics in a highly complex way. The response of Nitric oxide (NO) radiative emissions to the lower atmospheric forcing caused by the Hunga‐Tonga eruption has been examined in this study using Sounding of the Atmosphere using Broadband Emission Radiometry (SABER) measurements. On 15 January, neutral densities and NOIRF (Nitric Oxide Infrared Radiative Flux) were found to be depleted over the Hunga‐Tonga following the volcanic eruption, as observed by Swarm and SABER. Subsequently, the following day, a significant and highly localized enhancement in NOIRF is observed. Using TIEGCM (Thermosphere Ionosphere Electrodynamics General Circulation Model) simulations with gravity wave input, it has been established that wave‐induced lower atmospheric forcing is primarily responsible for the compositional and temperature changes. These changes influence the vibrational excitation mechanism of NO, resulting in the observed emission pattern during the Hunga‐Tonga event.

Resource type

document

Resource locator

Unique resource identifier

code

https://n2t.net/ark:/85065/d7ww7p3f

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

2025-04-16T00:00:00Z

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