Date (Creation)

2023-03-10

Date (Revision)

2023-03-10

Date (Publication)

2023-03-10

Date (released)

2023-03-10

Edition

1.0

Unique resource identifier

https://doi.org/10.5285/94b2f348-d6cc-4bcd-b921-5c0928ab3c2d

Codespace

doi

Unique resource identifier

GB/NERC/BAS/PDC/01718

Codespace

https://data.bas.ac.uk/

Unique resource identifier

NE/S007334/1

Codespace

award

Other citation details

Please cite this item as: Bond, A., Squires, F., Frey, M., & Kaiser, J. (2023). Atmospheric nitrous acid amount fraction at Halley in January and February 2022 (Version 1.0) [Data set]. NERC EDS UK Polar Data Centre. https://doi.org/10.5285/94b2f348-d6cc-4bcd-b921-5c0928ab3c2d

Credit

No credit.

Status

Completed

Point of contact

Organisation name	Individual name	Electronic mail address	Role
British Antarctic Survey	Bond, Amelia		Author
British Antarctic Survey	Squires, Freya		Author
British Antarctic Survey	Frey, Markus		Author
University of East Anglia	Kaiser, Jan		Author
NERC EDS UK Polar Data Centre		PDCServiceDesk@bas.ac.uk	Point of contact

Maintenance and update frequency

As needed

Maintenance note

Completed

Global Change Master Directory (GCMD) Science Keywords

• EARTH SCIENCE > Atmosphere > Atmospheric Chemistry > Trace Gases/Trace Species
• EARTH SCIENCE > Atmosphere > Atmospheric Chemistry
• EARTH SCIENCE > Atmosphere > Atmospheric Chemistry/Nitrogen Compounds

Theme

• atmospheric chemistry

• nitrous acid

• reactive nitrogen

• trace gas

Place

• Halley VI Research Station Antarctica

GEMET - INSPIRE themes, version 1.0

• Atmospheric conditions

Access constraints

Other restrictions

Other constraints

no limitations to public access

Access constraints

Other restrictions

Other constraints

no limitations

Use constraints

License

Other constraints

Open Government Licence v3.0

Use constraints

Other restrictions

Other constraints

Data supplied under Open Government Licence v3.0

Use constraints

Other restrictions

Other constraints

None

Unique resource identifier

url

Codespace

url

Association Type

Cross reference

Unique resource identifier

doi

Codespace

doi

Association Type

Cross reference

Spatial representation type

Text, table

Language

English

Character set

UTF8

Topic category

• Climatology, meteorology, atmosphere

Begin date

2022-01-22

End date

2022-02-03

Supplemental Information

It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk.

Title

European Petroleum Survey Group (EPSG) Geodetic Parameter Registry

Date (Publication)

2008-11-12

Cited responsible party

Organisation name	Individual name	Electronic mail address	Role
European Petroleum Survey Group		EPSGadministrator@iogp.org	Publisher

Unique resource identifier

urn:ogc:def:crs:EPSG::3031

Version

6.18.3

Hierarchy level

Dataset

Statement

Methodology:

The nitrous acid (HONO) amount fraction was measured at 1 minute resolution using a Long Path Absorption Photometer (LOPAP). Data has been processed to remove interferences and account for time delays in the instrument. Regular baseline measurements (blanks) and calibrations were carried out and have been applied to the data; the blanks and calibration periods have been removed from the dataset. The HONO amount fraction is given in pmol mol-1. The inlet height column relates to the height of the inlet of the LOPAP above the snow. A value of 0 represents inlet in transit and we recommend ignoring this data. The temperature measurements were collected at 1.26 and 0.05 m above the snow surface (indicated in column headings). The data was collected at 5 second intervals and are given in oC. U and V wind vectors were collected at 1 m above the snow at 5 second intervals and are given in ms-1. The temperature and wind data were collected to allow calculation of the HONO flux from the snow by the flux gradient method. All times are UTC.

Data collection:

Instruments:

a. HONO: LOng Path Absorption Photometer (LOPAP, QUMA Elektronik & Analytik GmbH)

b. Wind: Gill Wind Observer 70

c. Temperature: TME Ethernet Thermometer

Data quality:

HONO: During the campaign the LOPAP was calibrated every 5 days using nitrite solutions of known concentration (2 x 10^-3 and 8 x 10^-4 mg L-1). The gas flow rate was set to 2 L min-1 (298 K, 1 atm) with the internal mass flow controller and checked frequently using a flow meter (DryCal DC-Lite), and the liquid flow rate through the stripping coil for each channel was regularly measured volumetrically and was between 0.15 and 0.18 mL min-1 during the measurement period. Baseline measurements were made every 6 hours using a flow of pure nitrogen (99.998 %, BOC) at the instrument inlet. The detection limit (3 sigma-blank) was 0.26 pmol mol-1 for the measurement period. Any missing values and gaps in the time series correspond to blanks and calibrations that have now been removed from the dataset.

Wind and temperature: data has not been calibrated. Missing values are caused by issues with the instruments/data collection.

Metadata

File identifier

94b2f348-d6cc-4bcd-b921-5c0928ab3c2d XML

Metadata language

English

Character set

UTF8

Hierarchy level

Dataset

Hierarchy level name

dataset

Date stamp

2023-03-10

Metadata standard name

ISO 19115 Geographic Information - Metadata

Metadata standard version

ISO 19115:2003(E)

Metadata author

Organisation name	Individual name	Electronic mail address	Role
NERC EDS UK Polar Data Centre		polardatacentre@bas.ac.uk	Point of contact