Parameter: sigma-theta

Short Description:

sigma-theta

Short Name:

sigma_0

Official Name:

sigma_0

Units:

various

Graphable:

Yes

No Data Value:

External Identifier:

» skos:closeMatch http://vocab.nerc.ac.uk/collection/P01/current/POTDENS0/

External Identifier:

» skos:closeMatch http://vocab.nerc.ac.uk/collection/P01/current/SIGTPR01/

Description

sigma-theta (potential density), often reported in kg/m^3. Sigma-theta is denoted 'sigma_0', where the last digit, a zero, is used to represent the Greek letter theta. This altered density which takes into account adiabatic heating/cooling with changes in pressure is called the 'potential density'. (See How do we measure the density of sea water?)

Datasets associated with this parameter

Dataset Name	Brief Description	Project	PI-Supplied Parameter Name
AE1918 CTD Profiles	Processed CTD (1 m binned) data from AE1918 cruise	Zooplankton Diel Rhythm	sigma_e00, sigma_e11
AE1918 MOCNESS Continuous	Continuous MOCNESS data files from AE1918	Zooplankton Diel Rhythm	theta, sigma
AE2207 Processed CTD with Thermodynamic Calculations	AE2207 Processed CTD with Thermodynamic Calculations	InVirT	density
AT18-02_CTD	CTD data from cruise AT18-02 in the Gulf of Mexico, Nov-Dec 2010.	DWH_Deep_Microbes	sigma_0
AT42-05 and FK190211 hydrography	water column geochemistry AT42-05	Guaymas Basin Interactions	sigma_e00, sigma_e11
BAIT Bottle Data from Trace-metal CTD Casts	BAIT Bottle Data from Trace-metal CTD Casts	BAIT	Sigma_theta
Baltic GasEx (2018) Helium isotopes and Neon	Baltic GasEx Helium isotopes and Neon	Baltic GasEx	Dens_pot
BATS discrete bottle data	BATS discrete bottle data	BATS	Sigma_theta
Biofloat_48 CSTAR transmissometer Profiles	Raw and derived parameters from WET Labs C-Star Beam Transmissometer	NAB 2008	sigma_0
Biofloat_48 CTD Profiles	Full-resolution profiles of salinity and temperature plus derived variables from Seabird SBE41 Salinity and temperature sensor; Druck pressure sensor	NAB 2008	sigma_0
Biofloat_48 Hyperspectral Downwelling Plane Irradiance - Ed - Profiles	Hyperspectral downwelling plane irradiance (Ed) from Trios ACC	NAB 2008	sigma_0
Biofloat_48 Hyperspectral Upwelling Plane Radiance - Lu - Profiles	Hyperspectral upwelling radiance (Lu) Profiles from Trios ARC	NAB 2008	sigma_0
Biofloat_48 LI-COR sensor PAR profiles	Photosynthetically available radiation (PAR) profiles from LI-COR 192-SA sensor	NAB 2008	sigma_0
Biofloat_48 Optode dissolved oxygen sensor Profiles	Dissolved oxygen concentration and oxygen saturation from Aanderaa 3835 Optode oxygen sensor	NAB 2008	sigma_0
Biofloat_48 Satlantic ISUS Nitrate profiles	Nitrate and Raw spectral profiles from Satlantic Nitrate Sensor	NAB 2008	sigma_0
Biofloat_48 Seabird dissolved oxygen sensor Profiles	Dissolved oxygen profile from Seabird SBE43 Oxygen sensor	NAB 2008	sigma_0
Biofloat_48 Wetlabs FLNTU chlorophyll sensor Profiles	Profiles of chlorophyll fluorescence and volume scattering function from WET Labs FLNTU sensor	NAB 2008	sigma_0
BIOS-SCOPE survey biogeochemical data		BIOSSCOPE	sig_theta
BLOOFINZ-GoM nutrients and isotopes	BLOOFINZ-GoM Nutrients, Nitrate isotopes, DON isotopes	BLOOFINZ-IO	SigmaTheta
BMP2-vpr ess	BiomaperII environmental data from VPR data stream	SOGLOBEC, Southern Ocean Krill	sigma_0
BMP2_ess	Biomaper-II environmental data from Georges Bank, 1997-1999	GB	sigma_0
BMP2_ess	BIOMAPERII environmental data from acoustics data stream	SOGLOBEC, Southern Ocean Krill	sigma_0
bottle	Niskin Bottle Data	VERTIGO	sigma_0
bottle	Niskin bottle data from cruise KN207-03 (NA-VICE).	NA-VICE	sigma_0, sigma_0_2
bottle	Niskin bottle data from EN524 cruise.	OA, Hypoxia and Warming	sigma_0, sigma_0_2
bottle	Niskin bottle data from RV/Pelagia-325	Basin-scale Protists	podens
Bottle	Bottle data from SR1805 cruise	N2O in ETNP	Sigma_E00, Sigma_E00_sdev
Bottle AR29 - Transect 24	Bottle data April 2018	SPIROPA	Sigma_e00_avg, Sigma_e11_avg
bottle base hydrography	Niskin bottle basic CTD hydrographic data	EDDIES	sigma_0, sigma_0_S
Bottle Data	Bottle data	WHCOHH Algal Bloom Dynamics	Sigma_00
Bottle data from trace-metal CTD casts	Bottle data from trace-metal CTD casts	PIPERS	Sigma_Theta
bottle_data	Bottle data from CTD Rosettes from 2 cruises to the Gulf of Mexico during 2010.	DWH_Deep_Microbes	sigma_0
bottle_KN207-01	Niskin bottle data from cruise KN207-01.	SargassoSeaLipids	sigma_0, sigma_0_2
bottle_merged	Merged bottle and nutrient data	EqPac	sigma_0_ctd
bottle_SIO	SIO-CTD Rosette bottle basic CTD hydrographic and nutrient data	SOFeX	sigma_0
bottle_summ	Niskin bottle summary product; basic hydrographic data, thorium-234, pigments and nutrients	VERTIGO	sigma_0
bottle_TM_RR	Trace Metal Clean Rosette bottle hydrographic and nutrient data	SOFeX	sigma_0
BVAL bottle data (BATS Validation cruises)	BATS Validation cruise bottle data	BATS	Sigma_theta
Carbonate Chemistry and CTD	Carbonate chemistry and CTD data along a North Pacific transect between Hawaii and Alaska	CDISK_4, CaCO3 dissolution	Sigma0
ccs_proc_CTD	CTD data from CCS Process/Mesoscale Cruises	NEP	sigma_0
Core	Core data	C-MORE	sigma_0
CR1994_met	Mooring meteorological data from the Georges Crest from 1994	GB	sigma_0
CR1994_T_S	Mooring temperature, salinity, fluor data from the Georges Crest, 1994	GB	sigma_0
CR1995_bio_opt	Mooring bio-optical data from the Georges Crest, 1995.	GB	sigma_0
CR1995_met	Mooring meteorological data from the Georges Crest, 1995.	GB	sigma_0
CR1995_T_S	Mooring temperature, salinity, fluor data from the Georges Crest, 1995.	GB	sigma_0
crest	Mooring data from the Georges Crest, 1994-1995	GB	sigma_0
CTD	CTD profile data, including beam attenuation	Arabian Sea	sigma_0
CTD	CTD data with beam attenuation and fluorescence	NABE	sigma_0
CTD	Final version CTD, including beam attenuation optics	AESOPS	sigma_0
CTD	SOFeX project CTD profile data	SOFeX	sigma_0_S, sigma_0
CTD	CTD profile data	SEEDS I	Sigma_e00
CTD	CTD station profile data	VERTIGO	sigma_0
CTD	CTD Profiles	C-MORE	sigma_0
CTD	Processed hydrography data from Metzyme cruise (KM1128) collected using the ship's CTD packages	MetZyme	sigma_theta
CTD - Profiles	CTD Profile Data	SOIREE	sigma_0
CTD - Profiles	CTD Profile Data	COPAS08	sigma0_2
CTD 1m averaged profiles	CTD 1m averaged profiles	NAB 2008	sigma_0
CTD AR29, RB1904 and TN3638	CTD Casts New England Shelfbreak in 2018 and 2019	SPIROPA	sigma_e00, sigma_e11
CTD casts - Pelican 17-02	Depth-binned CTD casts from Methane Cycling OMZs from Pelican 17-02 in July-August 2016	Methane cycling in OMZs	sigma_0
CTD casts: time-binned - Pelican 17-02	CTD casts from Methane Cycling OMZs from Pelican 17-02 in July-August 2016	Methane cycling in OMZs	sigma_0
CTD Composite Profiles	CARIACO time series composite CTD profiles	CARIACO	sigma_0
CTD full resolution profiles	CTD full resolution profiles	NAB 2008	sigma_0
CTD full resolution profiles	Full resolution CTD profiles from project "Marine Nitrogen Cycling by Stable Isotope Probing"	Marine Nitrogen Cycling by Stable Isotope Probing	sigma_0, sigma_0_2
CTD profiles	CTD pressure, temperature, salinity profiles	EDDIES	sigma_0
CTD profiles	CTD cast profile data from MedFlux EN402 cruise	MedFlux	sigma_0
CTD profiles	One decibar-averaged CTD profile data from OC443	LipidCycling	sigma_0
CTD profiles	One decibar-averaged CTD profile data from cruise CB934	Quorum-sensing and the Carbon Cycle	sigma_0
CTD Profiles	One decibar-averaged CTD profiles from cruise AE-X1103	SargassoSeaLipids	sigma_0
CTD Profiles	CTD profile data from EN524 cruise.	OA, Hypoxia and Warming	sigma_0, sigma_0_2
CTD Profiles	CTD profiles	WHCOHH Algal Bloom Dynamics	SigmaA
CTD profiles - IC1	CTD profiles from GEOTRACES cruise KN193-06 for Intercalibration of sensors.	GEOTRACES IC	sigma_0, sigma_0
CTD profiles 2009	CTD cast temperature, salinity, oxygen, etc from OC454-02	Pickled Protists	sigma_0
CTD-ML	High resolution CTD and beam attenuation data	NABE	sigma_0
CTD-SIO	High resolution CTD and beam attenuation data	NABE	sigma_0
CTD_BC_PS	SeaBird SeaCat SBE-19 CTD profiler data from bottle casts (BC)	SOFeX	sigma_0
CTD_cg	CTD data from R/V Endeavor and R/V Oceanus, Gulf of Maine, 1997-1999.	GB	sigma_0
CTD_fv	Fishing vessel CTD data, Gulf of Maine, 1998	GB	sigma_0
CTD_ji	CTD for long term mooring cruises, GLOBEC Georges Bank, 1994-1999	GB	sigma_0
CTD_Klink_one_meter	Processed one meter(decibar) CTD data	SOGLOBEC	sigma_0
CTD_Klink_std_depth	Processed standard depth (pressure) CTD data from SOGLOBEC survey cruises	SOGLOBEC	sigma_0
CTD_KM1301	Processed CTD data from POWOW2 cruise (KM1301).	POWOW	sigma_0, sigma_0_2
CTD_KM1312	Processed CTD data from POWOW3 cruise (KM1312).	POWOW	sigma_0, sigma_0_2
CTD_MOCNESS.25	CTD data from the CMarZ 0.25m2 MOCNESS tows - includes ancillary tow info	CMarZ_2004-2010	sigma_0
CTD_MOCNESS.25	CTD data collected during MOCNESS hauls, Georges Bank, 1993-1997	GB	sigma_0
CTD_MOCNESS1	CTD data collected during MOCNESS hauls, Georges Bank, 1993-1999	GB	sigma_0
CTD_MOCNESS1	CTD data from the CMarZ 1m2 MOCNESS tows - includes ancillary tow infomation	CMarZ_2004-2010	sigma_0
CTD_MOCNESS1	CTD data collected during MOCNESS hauls	SOGLOBEC	sigma_0
CTD_MOCNESS1	CTD data collected during MOCNESS-1 deployments, Southern Ocean, 2006	SouthernSalps	sigma_0
CTD_MOCNESS1	CTD data collected during 1 meter2 MOCNESS hauls	OAPS	sigma_0
CTD_MOCNESS1	MOCNESS CTD data from the Gulf of Maine Krill project	Krill GoME	sigma_0
CTD_MOCNESS1	CTD data from MOCNESS tows taken in the Antarctic in 2011	Salp_Antarctic	sigma_0
CTD_MOCNESS10	CTD data collected during MOCNESS hauls, Georges Bank, 1994-1999.	GB	sigma_0
CTD_MOCNESS10	CTD data collected during MOCNESS hauls	SOGLOBEC	sigma_0
CTD_MOCNESS10	CTD data from the CMarZ 10m2 MOCNESS tows - includes ancillary tow info	CMarZ_2004-2010	sigma_0
CTD_MOCNESS10	CTD data collected during MOCNESS-10 deployments, Southern Ocean, 2006	SouthernSalps	sigma_0
CTD_MOCNESS_1_10	CTD data collected during MOCNESS tows with both 1m2 and 10m2 mouth openings	Antarctic_micronek	sigma_0
CTD_Profiles	CTD Profiles from cruise KN207-03 (NA-VICE).	NA-VICE	sigma_0, sigma_0_2
CTD_Profiles_KN207-01	CTD Profiles from cruise KN207-01.	SargassoSeaLipids	sigma_0, sigma_0_2
CTD_ps	BIO CTD Data from Eastern Gulf of Maine/Scotian Shelf, 1993-1999.	GB	sigma_0
CTD_TMR_SFX_RR	TMR CTD pressure, temperature, salinity profiles	SOFeX	sigma_0
CTD_TN277	Processed CTD data from POWOW1 cruise (TN277).	POWOW	sigma_0
CTD_transect_PS	CTD profile data from Polar Star Transect 1	SOFeX	sigma_0
d15N_nitrate	d15N and d18O isotopic analysis of nitrate samples	VERTIGO	sigma_0
Discrete bottle data from Hydrostation S	Hydrostation S bottle data	Hydrostation S	Sigma_theta
EN614 Hydrography	Hydrographic data collected during casts with a CTD-rosette system on R/V Endeavor cruise EN614 from May to June 2018	Amazon River Plume Nitrogen	Sigma_00, Sigma_11
EN614 Nutrients	EN614 Nutrients	Amazon River Plume Nitrogen	Sigma_t00, Sigma_t11
EN616 CTD hydrography		Cocco-Mix	Sigma_Primary, Sigma_Secondary
EN640 Bottle Data	EN640 Bottle Data	Amazon River Plume Nitrogen	Sigma_t00, Sigma_t11
EN640 Hydrographic Profiles	EN640 Hydrographic Profiles	Amazon River Plume Nitrogen	Sigma_t00, Sigma_t11
EN640 Nutrients	EN640 Nutrients	Amazon River Plume Nitrogen	Sigma_t11, Sigma_t00
ETSP N2O	ETSP N2O	Microbial Nitrification	sigma_theta
Exp and Survey Biogeochem and Microbial data	Experimental and survey biogeochemical and microbial data from SBDOM cruises in the Santa Barbara Channel.	SBDOM, SBC LTER	sigma_0, sigma_0_2
GOVARS SG502	GOVARS SG502	GOVARS	sigma_0
GOVARS SG503	GOVARS SG503	GOVARS	sigma_0
GP15 Bottle Leg 1	Bottle file from US GEOTRACES PMT (GP15) Leg 1 (RR1814)	U.S. GEOTRACES PMT	Sigma0
GP15 Bottle Leg 2	Bottle file from US GEOTRACES PMT (GP15) Leg 2	U.S. GEOTRACES PMT	Sigma0
HOT Niskin bottle samples	Niskin bottle water samples and CTD measurements at water sample depths from the Hawaii Ocean Time-Series (HOT)	HOT	SIGMA
HRR 2017 CTD	HRR ctd	HRR	sigma_e00
hydrocast Cesium isotopes	137Cs and 134Cs concentrations from Fukushima Radionuclide Project	Fukushima Radionuclide Levels	sigma_0
Hydrography, nutrients, and mean N2 fixation rates (SPIROPA, July 2019)	Hydrography, nutrients, and uptake rates (SPIROPA, July 2019)	SPIROPA	SigmaTheta
inventory	Inventory of U.S. GLOBEC Southern Ocean data	SOGLOBEC	sigma_0
KM1919-KM1920 hydrography and nutrients	KM1919-KM1920 hydrographic and nutrient data	ETNP_ParticleOmics, ETNP OMZ Denitrification	Sigma_theta
LOPC	LOPC data: microplankton size spectra from 0.1 to 35 mm	BenDiM	sigma_0
Luminoxyscape environmental	Luminoxyscape environmental	Vision under hypoxia	SigTheta
Luminoxyscape maximum depth	Luminoxyscape maximum depth	Vision under hypoxia	SigTheta
MOCNESS CTD tows	MOCNESS tow CTD data	EDDIES	sigma_0
MOCNESS Deployment Summary	Summary deployment data for MOCNESS 1m2 and 10m2 tows	SuspendSinkPart	sigma
MOCNESS_tabs	MOCNESS Summary Data from Gulf of Maine Krill Cruises	Krill GoME	sigma_0_min, sigma_0_max, sigma_0_avg, sigma_0
MOCNESS_tabs_PS24	MOCNESS Summary Data from Polarstern Cruise PS24-1 (ANTXXIV/I)	CMarZ_2004-2010	sigma_0
moorings_CTD 2001	Southern Ocean 2001 moorings: temp., salinity, density data (SLOW to LOAD)	SOGLOBEC	sigma_0
moorings_CTD 2001 -lowpass	Southern Ocean 2001 moorings: LOW PASS temp., salinity, density data	SOGLOBEC	sigma_0
moorings_CTD 2002	Southern Ocean 2002 moorings: temp., salinity, density data (SLOW to LOAD)	SOGLOBEC	sigma_0
moorings_CTD 2002 -lowpass	Southern Ocean 2002 moorings: LOW PASS temp., salinity, density data	SOGLOBEC	sigma_0
moorings_GSC	Great South Channel Mooring Data, Jan. - Aug. 1997	GB	sigma_0
moorings_ice profile 2001 -lowpass	Southern Ocean 2001 moorings: LOW PASS ice profiler data	SOGLOBEC	sigma_0
MV1110 CTD Nutrient and Particle Data		ANACONDAS	Sigma_theta, Average_Sigma_theta
N and O isotopes	Nitrate (d15N and d18O) and nitrite (d15N) isotopic data, and corresponding hydrographic data.	N2O Cycling	sigma_0
N2O Natural Abundance Isotopomers	N2O Natural Abundance Isotopomers in ETNP	N2O in ETNP	Sigma_theta
NBP1201 CTD Profiles	NBP1201 CTD Profiles	PRISM-RS	sigma_e00, sigma_e11
nep CTD	CTD data from CCS LTOP Cruises	NEP	sigma_0
NEP1995_bio_opt	Data from mooring deployed 1995 on Northeast Peak	GB	sigma_0
NEP1995_met	Data from mooring deployed 1995 on Northeast Peak	GB	sigma_0
NEP1995_T_S	Data from mooring deployed 1995 on Northeast Peak	GB	sigma_0
NEP1996_bio_opt	Data from mooring deployed 1996 on Northeast Peak	GB	sigma_0
NEP1996_met	Data from mooring deployed 1996 on Northeast Peak	GB	sigma_0
NEP1996_T_S	Data from mooring deployed 1996 on Northeast Peak	GB	sigma_0
NEP1997_bio_opt	Data from mooring deployed 1997 on Northeast Peak	GB	sigma_0
NEP1997_met	Data from mooring deployed 1997 on Northeast Peak	GB	sigma_0
NEP1997_T_S	Data from mooring deployed 1997 on Northeast Peak	GB	sigma_0
NEP1998_bio_opt	Data from mooring deployed 1998 on Northeast Peak	GB	sigma_0
NEP1998_met	Data from mooring deployed 1998 on Northeast Peak	GB	sigma_0
NEP1998_T_S	Data from mooring deployed 1998 on Northeast Peak	GB	sigma_0
NEP1999_bio_opt	Data from mooring deployed 1999 on Northeast Peak	GB	sigma_0
NEP1999_met	Data from mooring deployed 1999 on Northeast Peak	GB	sigma_0
NEP1999_T_S	Data from mooring deployed 1999 on Northeast Peak	GB	sigma_0
Niskin Bottle Hydrography	Niskin Bottle Hydrography from CTD Rosette	NAB 2008	sigma_0
Niskin bottle samples	Calibrated CTD measurements of salinity and oxygen and Niskin bottle water samples	Fukushima Radionuclide Levels	sigma_0
Niskin CTD hydrography	One decibar-averaged CTD values at bottle sample depths	Quorum-sensing and the Carbon Cycle	sigma_0
Niskin CTD hydrography	Niskin bottle basic hydrography from CTD	LipidCycling	sigma_0
Niskin CTD hydrography	Niskin bottle basic hydrography from CTD	SargassoSeaLipids	sigma_0
Niskin CTD hydrography - IC1	Niskin bottle basic hydrography from CTD from first GEOTRACES Intercalibration cruise.	GEOTRACES IC	sigma_0, sigma_0
Northern Gulf of Mexico Bottle Data	Northern Gulf of Mexico Bottle Data	GOMP	Sigma_t00, Sigma_t11
Northern Gulf of Mexico CTD Profiles	Northern Gulf of Mexico CTD Profile Data	GOMP	Sigma_e00, Sigma_e11
Penguin glider	Glider data from southern Ross Sea, 2012	Penguin Glider	sigma_0
phytoplankton chl-a	CTD data, bottle nutrients, and the contribution to total Chlorophyl-a by phytoplankton taxa	BenDiM	sigma_0
Prochlorococcus HOT/BATS	Five year time series of Prochlorococcus ecotype abundance at HOT and BATS sites	Prochlorococcus , C-MORE	sigma_0
Prochlorococcus_narB	Abundance of Prochlorococcus cells containing gene narB at HOT and BATS	Prochloro_ecology	sigma_0
RR1804/1805 hydrographic and nutrient data		ETNP_ParticleOmics	Sigma_0, Sigma_11
RR2004 CTD Data	RR2004 CTD Data	Conditioning_SAMW	sigma_e00, sigma_e11
RR2311 Bottle Data	RR2311 Bottle Data	NO2Ox_OMZs	SigmaTheta
SCCS Diazotroph Abundances	qPCR abundance data	BSUCS	potential_density
Seaglider Profiles	CTD, oxygen, and optic profile measurements from glider dives	NAB 2008	sigma_0
SeaSoar	SeaSoar CTD and Fluorometer	AESOPS	sigma_0
seasoar_CTD	SeaSoar CTD observations	GB	sigma_0_ctd
SEEPC MOCNESS-CTD	MOCNESS-CTD data from R/V Atlantis AT26-15 and AT21-02 in the Gulf of Mexico and Barbados seeps, from 2012 and 2014	SEEPC	sigma
SF6 - ctdin	SF6 Data from CTD In Casts	SOIREE	sigma_0
SF6 - ctdout	SF6 Data from CTD Out Casts	SOIREE	sigma_0
Speciation of Iodine-129 and Iodine-127	Speciation of I129 and I127 from Fukushima water samples	Fukushima Radionuclide Levels	sigma_0
Synthesis Product for Ocean Time Series (SPOTS)	Time-series data synthesis pilot product	METS RCN, EuroSea	SIGMA0
TMCTD	Processed CTD data from TM casts	AESOPS	sigma_0
TMR Hydrography	Hydrography data from Metzyme cruise (KM1128) collected using the Trace Metal Rosette (TMR)	MetZyme	Sigma_00
Trace metal and organic iron ligand data	Trace metal and organic iron ligand data	PLUME RAIDERS	Sigma_Theta_kg_m3
trawl catch CTD - CGoA	CTD data collected during CGOA Trawl cruises	NEP	sigma_0
VPR_ashjian_alt_SO	Display of Video Plankton Recorder data where taxa are not diplayed in separate columns	SOGLOBEC, Southern Ocean Krill	sigma_0
VPR_ashjian_nonzero_SO	Video Plankton Recorder data where values reported as zero or nd have been removed from display	SOGLOBEC, Southern Ocean Krill	sigma_0
VPR_ashjian_orig_SO	Video Plankton Recorder data from 2001, fall and winter.	Southern Ocean Krill, SOGLOBEC	sigma_0

Programs associated with this parameter

U.S. GLOBal ocean ECosystems dynamics

U.S. Joint Global Ocean Flux Study

Status message

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Parameter: sigma-theta