ERDDAP > info > bcodmo_dataset_768577

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Acces- sible	Title	Sum- mary	ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
		data	graph		files	public	Discrete bottle sample measurements for carbonate chemistry from samples collected in the Sage Lot Pond salt marsh tidal creek in Waquoit Bay, MA from 2012 to 2015		I   M	background			BCO-DMO	bcodmo_dataset_768577

The Dataset's Variables and Attributes

Row Type	Variable Name	Attribute Name	Data Type	Value
attribute	NC_GLOBAL	access_formats	String	.htmlTable,.csv,.json,.mat,.nc,.tsv
attribute	NC_GLOBAL	acquisition_description	String	Samples were collected from the Sage Lot Pond salt marsh tidal creek in Waquoit Bay, MA at approx. 41.5546N, 70.5071W. Discrete bottle samples were collected at ~30 cm above the bottom of the tidal creek every 1-2 h at the sampling site using a peristaltic or diaphragm pump for periods of a full tidal cycle (~12\u201314 h). DIC collection and analysis followed standard best practice procedures outlined by Dickson et al. (2007). Samples were collected through purgeable capsule filters with 0.45 \u03bcm pore size (Farrwest Environmental Supply, Texas, USA) into 250 mL borosilicate bottles, poisoned with 100 uL saturated mercuric chloride, sealed with a glass stopper coated with APIEZON\u00ae \u2013 L grease, and se- cured with a rubber band. DIC was analyzed using an Apollo SciTech DIC auto-analyzer (Model AS-C3), which uses a nondispersive infrared (NDIR) method. The sample is acidified with a 10% phosphoric acid in 10% sodium chloride solution, and CO2 is purged with high purity nitrogen gas and measured by a LI-COR 7000 infrared analyzer (LI-COR Environmental, Nebraska, USA). Certified Reference Material (CRM) from Dr. A. Dickson at Scripps Institution of Oceanography was used to calibrate the DIC auto-analyzer at least once daily. In addition, CRM was measured as a sample every few hours to gauge and correct any potential drift. The precision and accuracy of the instrument was ~ \u00b12.0 \u03bcmol kg-1. TA was measured with an Apollo SciTech alkalinity auto-titrator (Model AS- ALK2), a Ross combination pH electrode and a pH meter (ORION 3 Star) to perform a modified Gran titration [Wang and Cai, 2004]. The electrode and concentration of hydrochloric acid was calibrated every day. The CRMs were also measured as samples every few hours to correct any potential small drift. The accuracy and precision of the instrument was about \u00b1 2.0 \u03bcmol kg-1. An EXO2 Multiparameter Sonde (YSI Inc., Yellow Springs, OH) was submerged in the tidal creek to measure temperature and salinity. The YSI EXO2 recorded at intervals ranging from 2 min to 8 min. Reported YSI EXO2 sensor accuracy specifications are: 1% of the reading for salinity and 0.05 \u00b0C for temperature.
attribute	NC_GLOBAL	awards_0_award_nid	String	765031
attribute	NC_GLOBAL	awards_0_award_number	String	OCE-1459521
attribute	NC_GLOBAL	awards_0_data_url	String	http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1459521
attribute	NC_GLOBAL	awards_0_funder_name	String	NSF Division of Ocean Sciences
attribute	NC_GLOBAL	awards_0_funding_acronym	String	NSF OCE
attribute	NC_GLOBAL	awards_0_funding_source_nid	String	355
attribute	NC_GLOBAL	awards_0_program_manager	String	Henrietta N Edmonds
attribute	NC_GLOBAL	awards_0_program_manager_nid	String	51517
attribute	NC_GLOBAL	cdm_data_type	String	Other
attribute	NC_GLOBAL	comment	String	Salt marsh carbonate chemistry from discrete bottle samples PI: Zhaohui Aleck Wang (WHOI) Co-PIs: Kevin Kroeger & Meagan Gonneea (USGS) Version date: 23-May-2019
attribute	NC_GLOBAL	Conventions	String	COARDS, CF-1.6, ACDD-1.3
attribute	NC_GLOBAL	creator_email	String	info at bco-dmo.org
attribute	NC_GLOBAL	creator_name	String	BCO-DMO
attribute	NC_GLOBAL	creator_type	String	institution
attribute	NC_GLOBAL	creator_url	String	https://www.bco-dmo.org/
attribute	NC_GLOBAL	data_source	String	extract_data_as_tsv version 2.3 19 Dec 2019
attribute	NC_GLOBAL	date_created	String	2019-05-24T17:09:22Z
attribute	NC_GLOBAL	date_modified	String	2019-05-29T15:34:32Z
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
attribute	NC_GLOBAL	doi	String	10.1575/1912/bco-dmo.768577.1
attribute	NC_GLOBAL	infoUrl	String	https://www.bco-dmo.org/dataset/768577
attribute	NC_GLOBAL	institution	String	BCO-DMO
attribute	NC_GLOBAL	instruments_0_acronym	String	LI-COR LI-7000
attribute	NC_GLOBAL	instruments_0_dataset_instrument_nid	String	768593
attribute	NC_GLOBAL	instruments_0_description	String	The LI-7000 CO2/H2O Gas Analyzer is a high performance, dual cell, differential gas analyzer. It was designed to expand on the capabilities of the LI-6262 CO2/ H2O Gas Analyzer. A dichroic beam splitter at the end of the optical path provides radiation to two separate detectors, one filtered to detect radiation absorption of CO2 and the other to detect absorption by H2O. The two separate detectors measure infrared absorption by CO2 and H2O in the same gas stream. The LI-7000 CO2/ H2O Gas Analyzer is a differential analyzer, in which a known concentration (which can be zero) gas is put in the reference cell, and an unknown gas is put in the sample cell.
attribute	NC_GLOBAL	instruments_0_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/382/
attribute	NC_GLOBAL	instruments_0_instrument_name	String	LI-COR LI-7000 Gas Analyzer
attribute	NC_GLOBAL	instruments_0_instrument_nid	String	577
attribute	NC_GLOBAL	instruments_0_supplied_name	String	LI-COR 7000 infrared analyzer
attribute	NC_GLOBAL	instruments_1_acronym	String	Benchtop pH Meter
attribute	NC_GLOBAL	instruments_1_dataset_instrument_nid	String	768594
attribute	NC_GLOBAL	instruments_1_description	String	An instrument consisting of an electronic voltmeter and pH-responsive electrode that gives a direct conversion of voltage differences to differences of pH at the measurement temperature. (McGraw-Hill Dictionary of Scientific and Technical Terms) This instrument does not map to the NERC instrument vocabulary term for 'pH Sensor' which measures values in the water column. Benchtop models are typically employed for stationary lab applications.
attribute	NC_GLOBAL	instruments_1_instrument_name	String	Benchtop pH Meter
attribute	NC_GLOBAL	instruments_1_instrument_nid	String	681
attribute	NC_GLOBAL	instruments_1_supplied_name	String	ORION 3 Star pH meter
attribute	NC_GLOBAL	instruments_2_acronym	String	Automatic titrator
attribute	NC_GLOBAL	instruments_2_dataset_instrument_nid	String	768588
attribute	NC_GLOBAL	instruments_2_description	String	Instruments that incrementally add quantified aliquots of a reagent to a sample until the end-point of a chemical reaction is reached.
attribute	NC_GLOBAL	instruments_2_instrument_external_identifier	String	https://vocab.nerc.ac.uk/collection/L05/current/LAB12/
attribute	NC_GLOBAL	instruments_2_instrument_name	String	Automatic titrator
attribute	NC_GLOBAL	instruments_2_instrument_nid	String	682
attribute	NC_GLOBAL	instruments_2_supplied_name	String	Apollo SciTech alkalinity auto-titrator (Model AS-ALK2)
attribute	NC_GLOBAL	instruments_3_dataset_instrument_nid	String	768589
attribute	NC_GLOBAL	instruments_3_description	String	A pump is a device that moves fluids (liquids or gases), or sometimes slurries, by mechanical action. Pumps can be classified into three major groups according to the method they use to move the fluid: direct lift, displacement, and gravity pumps
attribute	NC_GLOBAL	instruments_3_instrument_name	String	Pump
attribute	NC_GLOBAL	instruments_3_instrument_nid	String	726
attribute	NC_GLOBAL	instruments_3_supplied_name	String	peristaltic or diaphragm pump
attribute	NC_GLOBAL	instruments_4_acronym	String	Apollo SciTech AS-C3
attribute	NC_GLOBAL	instruments_4_dataset_instrument_nid	String	768592
attribute	NC_GLOBAL	instruments_4_description	String	A Dissolved Inorganic Carbon (DIC) analyser, for use in aquatic carbon dioxide parameter analysis of coastal waters, sediment pore-waters, and time-series incubation samples. The analyser consists of a solid state infrared CO2 detector, a mass-flow controller, and a digital pump for transferring accurate amounts of reagent and sample. The analyser uses an electronic cooling system to keep the reactor temperature below 3 degrees Celsius, and a Nagion dry tube to reduce the water vapour and keep the analyser drift-free and maintenance-free for longer. The analyser can handle sample volumes from 0.1 - 1.5 millilitres, however the best results are obtained from sample volumes between 0.5 - 1 millilitres. It takes approximately 3 minutes per analysis, and measurement precision is plus or minus 2 micromoles per kilogram or higher for surface seawater. It is designed for both land based and shipboard laboratory use.
attribute	NC_GLOBAL	instruments_4_instrument_name	String	Apollo SciTech AS-C3 Dissolved Inorganic Carbon (DIC) analyser
attribute	NC_GLOBAL	instruments_4_instrument_nid	String	768590
attribute	NC_GLOBAL	instruments_4_supplied_name	String	Apollo SciTech DIC auto-analyzer (Model AS-C3)
attribute	NC_GLOBAL	instruments_5_acronym	String	YSI EXO
attribute	NC_GLOBAL	instruments_5_dataset_instrument_nid	String	768597
attribute	NC_GLOBAL	instruments_5_description	String	Comprehensive multi-parameter, water-quality monitoring sondes designed for long-term monitoring, profiling and spot sampling. The EXO sondes are split into several categories: EXO1 Sonde, EXO2 Sonde, EXO3 Sonde. Each category has a slightly different design purpose with the the EXO2 and EXO3 containing more sensor ports than the EXO1. Data are collected using up to four user-replaceable sensors and an integral pressure transducer. Users communicate with the sonde via a field cable to an EXO Handheld, via Bluetooth wireless connection to a PC, or a USB connection to a PC. Typical parameter specifications for relevant sensors include dissolved oxygen with ranges of 0-50 mg/l, with a resolution of +/- 0.1 mg/l, an accuracy of 1 percent of reading for values between 0-20 mg/l and an accuracy of +/- 5 percent of reading for values 20-50 mg/l. Temp ranges are from-5 to +50 degC, with an accuracy of +/- 0.001 degC. Conductivity has a range of 0-200 mS/cm, with an accuracy of +/-0.5 percent of reading + 0.001 mS/cm and a resolution of 0.0001 - 0.01 mS/cm.
attribute	NC_GLOBAL	instruments_5_instrument_name	String	YSI EXO multiparameter water quality sondes
attribute	NC_GLOBAL	instruments_5_instrument_nid	String	768595
attribute	NC_GLOBAL	instruments_5_supplied_name	String	EXO2 Multiparameter Sonde (YSI Inc., Yellow Springs, OH)
attribute	NC_GLOBAL	keywords	String	bco, bco-dmo, biological, chemical, data, dataset, date, density, dic, dmo, earth, Earth Science > Oceans > Salinity/Density > Salinity, erddap, iso, management, ocean, oceanography, oceans, office, practical, preliminary, salinity, science, sea, sea_water_practical_salinity, seawater, temperature, time, water
attribute	NC_GLOBAL	keywords_vocabulary	String	GCMD Science Keywords
attribute	NC_GLOBAL	license	String	https://www.bco-dmo.org/dataset/768577/license
attribute	NC_GLOBAL	metadata_source	String	https://www.bco-dmo.org/api/dataset/768577
attribute	NC_GLOBAL	param_mapping	String	{'768577': {'ISO_DateTime_UTC': 'flag - time'}}
attribute	NC_GLOBAL	parameter_source	String	https://www.bco-dmo.org/mapserver/dataset/768577/parameters
attribute	NC_GLOBAL	people_0_affiliation	String	Woods Hole Oceanographic Institution
attribute	NC_GLOBAL	people_0_affiliation_acronym	String	WHOI
attribute	NC_GLOBAL	people_0_person_name	String	Zhaohui Aleck Wang
attribute	NC_GLOBAL	people_0_person_nid	String	51347
attribute	NC_GLOBAL	people_0_role	String	Principal Investigator
attribute	NC_GLOBAL	people_0_role_type	String	originator
attribute	NC_GLOBAL	people_1_affiliation	String	United States Geological Survey
attribute	NC_GLOBAL	people_1_affiliation_acronym	String	USGS
attribute	NC_GLOBAL	people_1_person_name	String	Meagan Gonneea
attribute	NC_GLOBAL	people_1_person_nid	String	768545
attribute	NC_GLOBAL	people_1_role	String	Co-Principal Investigator
attribute	NC_GLOBAL	people_1_role_type	String	originator
attribute	NC_GLOBAL	people_2_affiliation	String	United States Geological Survey
attribute	NC_GLOBAL	people_2_affiliation_acronym	String	USGS
attribute	NC_GLOBAL	people_2_person_name	String	Kevin Kroeger
attribute	NC_GLOBAL	people_2_person_nid	String	768544
attribute	NC_GLOBAL	people_2_role	String	Co-Principal Investigator
attribute	NC_GLOBAL	people_2_role_type	String	originator
attribute	NC_GLOBAL	people_3_affiliation	String	Woods Hole Oceanographic Institution
attribute	NC_GLOBAL	people_3_affiliation_acronym	String	WHOI BCO-DMO
attribute	NC_GLOBAL	people_3_person_name	String	Shannon Rauch
attribute	NC_GLOBAL	people_3_person_nid	String	51498
attribute	NC_GLOBAL	people_3_role	String	BCO-DMO Data Manager
attribute	NC_GLOBAL	people_3_role_type	String	related
attribute	NC_GLOBAL	project	String	Salt Marsh Paradox
attribute	NC_GLOBAL	projects_0_acronym	String	Salt Marsh Paradox
attribute	NC_GLOBAL	projects_0_description	String	NSF Award Abstract: Carbon production in vegetated coastal systems such as marshes is among the highest in the biosphere. Resolving carbon production from marshes and assessing their impacts on coastal carbon cycling are critical to determining the long-term impacts of global change such as ocean acidification and eutrophication. In this project, researchers will use new methods to improve the assessment of carbon production from salt marshes. The overarching goals are to understand the role of coastal wetlands in altering carbonate chemistry, alkalinity, and carbon budgets of the coastal ocean, as well as their capacity to buffer against anthropogenically driven chemical changes, such as ocean acidification. This project will involve training for undergraduate, graduate, and postdoctoral researchers, and will provide educational opportunities for students from a local Native American tribe. Tidal water, after exchange with intertidal salt marshes, contains higher total alkalinity (TA), higher carbon dioxide, but lower pH. These highly productive, vegetated wetlands are deemed to export both alkalinity and dissolved inorganic carbon (DIC) to the ocean. This creates an apppartent paradox in that salt marshes are both an acidifying and alkalizing source to the ocean. Limited studies suggest that marsh DIC and alkalinity export fluxes may be a significant player in regional and global carbon budgets, but the current estimates are still far too uncertain to be conclusive. Unfortunately, tidal marsh ecosystems have dramatically diminished in the recent past, and are likely to diminish further due to sea level rise, land development, eutrophication, and other anthropogenic pressures. To assess the potential impacts of this future change, it is imperative to understand its current status and accurately evaluate its significatce to other parts of the carbon cycle. Similarly, little is know about the distinct sources of DIC and alkalinity being exported from marshes via tidal exchange, although aerobic and various anaerobic respiration processes have been indicated. In this study, researchers will undertake an in-depth study using new methods to vastly improve export fluxes from intertidal salt marshes through tidal exchange over minutes to annual scales, characterize and evaluate the compostiion (carbonate versus non-carbonate alkalinity) of marsh exported TA, the role and significance of the DOC pool in altering carbonate chemistry and export fluxes, identify sources of DIC being exported in tidal water, and investigate how marsh export of TA and DIC impacts carbonate chemistry and the carbon and alkalinity budgets in coastal waters.
attribute	NC_GLOBAL	projects_0_end_date	String	2019-02
attribute	NC_GLOBAL	projects_0_geolocation	String	Sage Lot Pond salt marsh tidal creek in Waquoit Bay, MA at approx. 41.5546N, -70.5071W
attribute	NC_GLOBAL	projects_0_name	String	Collaborative Research: The Paradox of Salt Marshes as a Source of Alkalinity and Low pH, High Carbon Dioxide Water to the Ocean: A First In-depth Study of A Diminishing Source
attribute	NC_GLOBAL	projects_0_project_nid	String	765032
attribute	NC_GLOBAL	projects_0_start_date	String	2015-03
attribute	NC_GLOBAL	publisher_name	String	Biological and Chemical Oceanographic Data Management Office (BCO-DMO)
attribute	NC_GLOBAL	publisher_type	String	institution
attribute	NC_GLOBAL	sourceUrl	String	(local files)
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v55
attribute	NC_GLOBAL	summary	String	Discrete bottle sample measurements for carbonate chemistry from samples collected in the Sage Lot Pond salt marsh tidal creek in Waquoit Bay, MA from 2012 to 2015.
attribute	NC_GLOBAL	time_coverage_end	String	2015-12-16T19:32:00Z
attribute	NC_GLOBAL	time_coverage_start	String	2012-04-09T13:04:00Z
attribute	NC_GLOBAL	title	String	Discrete bottle sample measurements for carbonate chemistry from samples collected in the Sage Lot Pond salt marsh tidal creek in Waquoit Bay, MA from 2012 to 2015
attribute	NC_GLOBAL	version	String	1
attribute	NC_GLOBAL	xml_source	String	osprey2erddap.update_xml() v1.3
variable	time		double
attribute	time	_CoordinateAxisType	String	Time
attribute	time	actual_range	double	1.33397664E9, 1.45029432E9
attribute	time	axis	String	T
attribute	time	bcodmo_name	String	ISO_DateTime_UTC
attribute	time	description	String	Date and time (UTC) formatted to ISO 8601 standard. Format: yyyy-mm-ddTHH:MM:SS
attribute	time	ioos_category	String	Time
attribute	time	long_name	String	ISO Date Time UTC
attribute	time	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/DTUT8601/
attribute	time	source_name	String	ISO_DateTime_UTC
attribute	time	standard_name	String	time
attribute	time	time_origin	String	01-JAN-1970 00:00:00
attribute	time	time_precision	String	1970-01-01T00:00:00Z
attribute	time	units	String	seconds since 1970-01-01T00:00:00Z
variable	DIC		float
attribute	DIC	_FillValue	float	NaN
attribute	DIC	actual_range	float	1366.85, 2548.9
attribute	DIC	bcodmo_name	String	DIC
attribute	DIC	description	String	Dissolved inorganic carbon (DIC)
attribute	DIC	long_name	String	DIC
attribute	DIC	units	String	micromoles per kilogram (umol kg-1)
variable	TA		float
attribute	TA	_FillValue	float	NaN
attribute	TA	actual_range	float	1330.34, 2279.87
attribute	TA	bcodmo_name	String	TALK
attribute	TA	description	String	Total alkalinity
attribute	TA	long_name	String	TA
attribute	TA	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/MDMAP014/
attribute	TA	units	String	micromoles per kilogram (umol kg-1)
variable	TEMPERATURE		float
attribute	TEMPERATURE	_FillValue	float	NaN
attribute	TEMPERATURE	actual_range	float	4.41, 29.54
attribute	TEMPERATURE	bcodmo_name	String	temperature
attribute	TEMPERATURE	description	String	Water temperature
attribute	TEMPERATURE	long_name	String	TEMPERATURE
attribute	TEMPERATURE	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/TEMPP901/
attribute	TEMPERATURE	units	String	degrees Celsius
variable	SALINITY		float
attribute	SALINITY	_FillValue	float	NaN
attribute	SALINITY	actual_range	float	8.84, 31.96
attribute	SALINITY	bcodmo_name	String	sal
attribute	SALINITY	colorBarMaximum	double	37.0
attribute	SALINITY	colorBarMinimum	double	32.0
attribute	SALINITY	description	String	Water salinity
attribute	SALINITY	long_name	String	Sea Water Practical Salinity
attribute	SALINITY	nerc_identifier	String	https://vocab.nerc.ac.uk/collection/P01/current/PSALST01/
attribute	SALINITY	units	String	practical salinity scale

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.