ERDDAP > info > SPI_10_5281_zenodo_3843375

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Title	Sum- mary	FGDC, ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
		data	graph		files	SPI - Iodine monoxide (IO) measurements made using a MAX-DOAS (Multi-AXis Differential Optical Absorption Spectroscopy) instrument in the austral summer of 2016/17 during the Antarctic Circumnavigation Expedition (ACE).		M	background			SPI	SPI_10_5281_zenodo_3843375

The Dataset's Variables and Attributes

Row Type	Variable Name	Attribute Name	Data Type	Value
attribute	NC_GLOBAL	_NCProperties	String	version=2,netcdf=4.7.2,hdf5=1.10.5
attribute	NC_GLOBAL	cdm_data_type	String	Other
attribute	NC_GLOBAL	citation	String	Benavent, N., Garcia-Nieto, D., Cuevas, C.A. and Saiz-Lopez, A. (2020). Iodine monoxide (IO) measurements made using a MAX-DOAS (Multi-Axis Differential Optical Absorption Spectroscopy) instrument in the austral summer of 2016/17 during the Antarctic Circumnavigation Expedition (ACE). (Version 1.0) [Data set]. Zenodo. https://doi.org/10.5281/zenodo.3843376
attribute	NC_GLOBAL	contributors	String	[{'title': 'Nuria Benavent', 'path': 'https://orcid.org/0000-0003-3473-0629', 'role': 'author', 'organisation': 'Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, Consejo Superior de Investigaciones Científicas, Spain'}, {'title': 'David Garcia-Nieto', 'path': 'https://orcid.org/0000-0002-0884-5978', 'role': 'author', 'organisation': 'Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, Consejo Superior de Investigaciones Científicas, Spain'}, {'title': 'Carlos Alberto Cuevas', 'path': 'https://orcid.org/0000-0002-9251-5460', 'role': 'author', 'organisation': 'Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, Consejo Superior de Investigaciones Científicas, Spain'}, {'title': 'Alfonso Saiz-Lopez', 'path': 'https://orcid.org/0000-0002-0060-1581', 'email': 'a.saiz@csic.es', 'role': 'author', 'organisation': 'Department of Atmospheric Chemistry and Climate, Institute of Physical Chemistry Rocasolano, Consejo Superior de Investigaciones Científicas, Spain'}]
attribute	NC_GLOBAL	Conventions	String	COARDS, CF-1.6, ACDD-1.3
attribute	NC_GLOBAL	creator_name	String	Nuria Benavent
attribute	NC_GLOBAL	creator_type	String	institution
attribute	NC_GLOBAL	creator_url	String	https://orcid.org/0000-0003-3473-0629
attribute	NC_GLOBAL	DOI	String	https://doi.org/10.5281/zenodo.3843376
attribute	NC_GLOBAL	infoUrl	String	https://doi.org/10.5281/zenodo.3843376
attribute	NC_GLOBAL	institution	String	SPI
attribute	NC_GLOBAL	keywords	String	ACE, Antarctic Circumnavigation Expedition, Antarctica, atmosphere, halogens, IO, iodine monoxide, MAX-DOAS
attribute	NC_GLOBAL	license	String	CC-BY-4.0
attribute	NC_GLOBAL	platform_code	String	UBXH3_ACE_3843375
attribute	NC_GLOBAL	platform_name	String	R/V Akademik Tryoshnikov
attribute	NC_GLOBAL	sourceUrl	String	(local files)
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	summary	String	To achieve the objectives of the project, we installed a MAX-DOAS (Multi-AXis Differential Optical Absorption Spectroscopy) instrument on the vessel “Akademik Tryoshnikov”. This instrument is based on the DOAS technique, which is used to measure trace gas concentrations in the atmosphere. The method consists of the analysis of the spectral absorption lines that each trace gas produces in the solar spectra. The DOAS technique uses the narrowband features that every trace gas has in their spectral absorption coefficients. This differential cross section is unique and acts like a fingerprint for the trace gases, allowing to differentiate between them and to estimate their concentrations (for further details see Platt and Stutz, 2008). In the past decades, atmospheric chemists have come to realize that halogen species (like Cl, Br or I and their oxides ClO, BrO and IO) exert a powerful influence on the chemical composition of the troposphere and through that influence affect the evolution of pollutants, hence having a significant impact on climate. These reactive halogen species are potent oxidizers for organic and inorganic compounds throughout the troposphere. In particular, halogen cycles can act on several compounds (such as methane, ozone, particles…), all of which are climate forcing agents through direct and indirect radiative effects. Dynamic exchange of halogens between ocean, sea ice, snowpack and atmosphere is the main driver for the frequent occurrence of Ozone Depletion Events (ODEs) and Atmospheric Mercury Depletion Events (AMDEs) (Saiz-Lopez and von Glasow, 2012). In this dataset we present the mixing ratio and vertical column density of iodine monoxide (IO) recorded in the austral summer of 2016/2017 in the Southern Ocean and Atlantic Ocean, averaged over one-hour time periods.
attribute	NC_GLOBAL	title	String	SPI - Iodine monoxide (IO) measurements made using a MAX-DOAS (Multi-AXis Differential Optical Absorption Spectroscopy) instrument in the austral summer of 2016/17 during the Antarctic Circumnavigation Expedition (ACE).
attribute	NC_GLOBAL	type	String	ferrybox/ship
variable	datetime		double
attribute	datetime	_ChunkSizes	uint	512
attribute	datetime	_CoordinateAxisType	String	Time
attribute	datetime	actual_range	double	1.4861484E9, 1.4916708E9
attribute	datetime	axis	String	T
attribute	datetime	description	String	time
attribute	datetime	ioos_category	String	Time
attribute	datetime	long_name	String	Time
attribute	datetime	standard_name	String	time
attribute	datetime	time_origin	String	01-JAN-1970 00:00:00
attribute	datetime	units	String	seconds since 1970-01-01T00:00:00Z
variable	io_mixing_ratio		double
attribute	io_mixing_ratio	_ChunkSizes	uint	512
attribute	io_mixing_ratio	actual_range	double	0.156, 5.558
attribute	io_mixing_ratio	description	String	Quotient between the number density of iodine monoxide (IO) and the number density of the air or atmosphere at that same height, expressed in units of parts per trillion (1 out every 1e12 air molecules) or pptv [parts per trillion]
attribute	io_mixing_ratio	spi_original_name	String	io_mixing_ratio (pptv)
attribute	io_mixing_ratio	units	String	parts per trillion
variable	io_mixing_ratio_unc		double
attribute	io_mixing_ratio_unc	_ChunkSizes	uint	512
attribute	io_mixing_ratio_unc	actual_range	double	0.029, 1.347
attribute	io_mixing_ratio_unc	description	String	Uncertainty in the iodine monoxide (IO) mixing ratio [parts per trillion]
attribute	io_mixing_ratio_unc	spi_original_name	String	io_mixing_ratio_unc (pptv)
attribute	io_mixing_ratio_unc	units	String	parts per trillion
variable	io_vcd		double
attribute	io_vcd	_ChunkSizes	uint	512
attribute	io_vcd	actual_range	double	1.73E11, 2.23E13
attribute	io_vcd	description	String	Vertical column density of iodine monoxide (IO) representing the vertical integration of the trace gas concentration profile [molecules per cm^2]
attribute	io_vcd	spi_original_name	String	io_vcd (molec/cm^2)
variable	io_vcd_unc		double
attribute	io_vcd_unc	_ChunkSizes	uint	512
attribute	io_vcd_unc	actual_range	double	2.78E11, 3.16E12
attribute	io_vcd_unc	description	String	Uncertainty in the vertical column density of iodine monoxide (IO) [molecules per cm^2]
attribute	io_vcd_unc	spi_original_name	String	io_vcd_unc (molec/cm^2)

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.