Identification

Title

Investigating an unusually large 28‐day oscillation in mesospheric temperature over Antarctica using ground‐based and satellite measurements

Abstract

The Utah State University Advanced Mesospheric Temperature Mapper was deployed at the Amundsen-Scott South Pole Station in 2010 to measure OH temperature at similar to 87 km as part of an international network to study the mesospheric dynamics over Antarctica. During the austral winter of 2014, an unusually large amplitude similar to 28-day oscillation in mesospheric temperature was observed for similar to 100 days from the South Pole Station. This study investigates the characteristics and global structure of this exceptional planetary-scale wave event utilizing ground-based mesospheric OH temperature measurements from two Antarctic stations (South Pole and Rothera) together with satellite temperature measurements from the Microwave Limb Sounder on the Aura satellite and the Solar Occultation For Ice Experiment on the Aeronomy of Ice in the Mesosphere satellite. Our analyses have revealed that this large oscillation is a wintertime, high-latitude phenomenon, exhibiting a coherent zonal wave #1 structure below 80-km altitude. At higher altitudes, the wave was confined in longitude between 180 degrees E and 360 degrees E. The amplitude of this oscillation reached similar to 15 K at 85 km, and it was observed to grow with altitude as it extended from the stratosphere into the lower thermosphere in the Southern Hemisphere. The satellite data further established the existence of this oscillation in the Northern Hemisphere during the boreal wintertime. The main characteristics and global structure of this event as observed in temperature are consistent with the predicted 28-day Rossby Wave (1,4) mode.

Resource type

document

Resource locator

Unique resource identifier

code

http://n2t.net/ark:/85065/d77947d6

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

2019-08-16T00:00:00Z

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

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