Atmospheric nitrous acid amount fraction at Halley in January and February 2022 ...

• Main Authors: Bond, Amelia, Squires, Freya, Frey, Markus, Kaiser, Jan
• Format: Dataset
• Language: English
• Published: NERC EDS UK Polar Data Centre 2023
• Subjects: "EARTH SCIENCE","ATMOSPHERE","ATMOSPHERIC CHEMISTRY","TRACE GASES/TRACE SPECIES"; "EARTH SCIENCE","ATMOSPHERE","ATMOSPHERIC CHEMISTRY"; "EARTH SCIENCE","ATMOSPHERE","ATMOSPHERIC CHEMISTRY","NITROGEN COMPOUNDS"; atmospheric chemistry; nitrous acid; reactive nitrogen; trace gas; Antarctic; Antarc*
• Online Access: https://dx.doi.org/10.5285/94b2f348-d6cc-4bcd-b921-5c0928ab3c2d; https://data.bas.ac.uk/full-record.php?id=GB/NERC/BAS/PDC/01718

Atmospheric nitrous acid (HONO) amount fraction measured in the clean air sector at Halley VI Research Station between 22 January and 3 February 2022. The data was collected using a Long Path Absorption Photometer (LOPAP), the instrument inlet height above the snow was changed during the measurement period, this is indicated in the dataset. Temperature and wind speed data were collected are included to enable the HONO flux from the snow to be calculated. This work was supported by the Natural Environment Research Council and the ARIES Doctoral Training Partnership [grant number NE/S007334/1]. The fieldwork at Halley VI Research Station was funded by the Collaborative Antarctic Science Scheme (CASS). ... : 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 ...