Parameter: sigma-t

Short Description:

sigma-t

Short Name:

sigma_t

Official Name:

sigma-t

Units:

various

Graphable:

Yes

No Data Value:

External Identifier:

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

Description

Sigma-t density, often reported in kg/m^3 - 1000. 'Sigma-t' is density minus 1000 (without the effect of pressure). It is normally calculated from observations of temperature and salinity. (See How do we measure the density of sea water?)

Datasets associated with this parameter

Dataset Name	Brief Description	Project	PI-Supplied Parameter Name
Acartia tonsa mortality with CTD data: 5 daytrips	Acartia tonsa mortality from net tows and associated CTD data	CopesPopDynHypoZone	sigma_t00
Acartia tonsa mortality with CTD data: RV Sharp	Acartia tonsa mortality from Niskin and associated CTD data	CopesPopDynHypoZone	Sigma_t00
AE1620 bottles: Biogeochemical and Microbial data	bottle data AE1620	Bacterial DOC cycling	Sigma_theta
AE1703 bottles: Biogeochemical and Microbial data	bottle data AE1703	Bacterial DOC cycling	Sigma_theta
Ammonia-nitrite-nitrate assays	Ammonia-nitrite-nitrate assays	Marine Nitrogen Cycle	Sigma_t
Arabian Sea phytoplankton	Phytoplankton and nutrients from Northern Arabian Sea, 2009-2011	Arabian Sea Noctiluca	sigma_t
Bacteria	Bacterial abundance, thymidine & leucine incorporation	EDDIES	sigma_t
bottle	Merged hydrographic, nutrient and Carbon/Nitrogen	NABE	sigma_t
bottle	Niskin bottle data from cruise KN207-03 (NA-VICE).	NA-VICE	sigma_t, sigma_t_2
Bottle AR29	Bottle data April 2018	SPIROPA	sigmat, sigmat2
Bottle Data	CTD Bottle Data	DIAZOTROPHS	SigmaT
Bottle Data for EN665 Gulf of Maine	Bottle Data for EN665 Gulf of Maine	Calcite Saturometer	SIGMA_T
Bottle RB1904	Bottle dataset May 2019	SPIROPA	sigmat, sigmat2
Bottle TN368	Bottle data, July 2019	SPIROPA	sigmat, sigmat2
bottle_data	Bottle data from CTD Rosettes from 2 cruises to the Gulf of Mexico during 2010.	DWH_Deep_Microbes	sigma_t
bottle_KN207-01	Niskin bottle data from cruise KN207-01.	SargassoSeaLipids	sigma_t_2, sigma_t
bottle_merged	Merged bottle and nutrient data	EqPac	sigma_t_ctd
bottle_proc	Rosette Bottle Data (nutrients, chl), 2001 and 2003	NEP	sigma_t
Cariaco Meta-Omics Cruises CTD data	CTD profiles collected in support of molecular samples.	CariacoMetaOmics	sigma_t
Chemistry - May 2007	Chemistry - May 2007	Anammox Black Sea	Sigma_Tau
Chile - Glider - Dive Data	Chile - Glider - Dive Data	MI-LOCO	sigma_t
CTD	CTD profile data, including beam attenuation	Arabian Sea	sigma_t
CTD	Final version CTD, including beam attenuation optics	AESOPS	sigma_t
CTD	SOFeX project CTD profile data	SOFeX	sigma_t, sigma_t_S
CTD	CTD profile data	SEEDS I	Sigma_t00
CTD	continuous downcast profile data in 1m bins	CORSACS	sigma_t
CTD - BAG 1	CTD - BAG 1	C-MORE	sigma_t
CTD - Bottle	CTD Bottle Data (Preliminary)	TZEX	Sig_t
CTD - Bottle	CTD - Bottle	GoMX - NGOMEX	Sigma_t00_avg, Sigma_t00_sdev
CTD - Profiles	CTD Profile Data	ECOHAB-PNW	SIGMA_T, SIGMA_THETA
CTD - Profiles	CTD Profile Data	RISE	SIGMA_T, SIGMA_THETA
CTD - Profiles	CTD Profile Data	COPAS08	sigma0
CTD - Profiles	CTD - Profiles	GoMX - NGOMEX	sigma_t00
CTD - Profiles	CTD Profile Data	Northern Gulf of Alaska Phytoplankton	sigma_t00, sigma_t11
CTD Boothbay to Hague	CTD data from F/V Tenacious, Gulf of Maine, 2001-2003, associated with lobster larvae study	NEC-CoopRes	sigma_t
CTD Composite Profiles	CARIACO time series composite CTD profiles	CARIACO	sigma_t
CTD data from LMG1110	CTD downcasts from LMG-1110 in the Antarctic in November, 2011.	Salp_Antarctic	sigma_t
CTD Individual Profiles	CARIACO time series individual CTD profiles	CARIACO	sigma_t00
CTD KN195-03	CTD data from KN195-03 in the equatorial and north Pacific.	Subseafloor Microbial Life	sigma_t_2
CTD Log	CTD Log	IronExI	Sigma_t
CTD profiles	CTD pressure, temperature, salinity profiles	EDDIES	sigma_t
CTD Profiles	CTD Profiles	DIAZOTROPHS	SigmaT
CTD profiles	CTD cast profile data from MedFlux EN402 cruise	MedFlux	sigma_t
CTD profiles	CTD cast profile data from MedFlux EN416 cruise	MedFlux	sigma_t
CTD profiles - IC1	CTD profiles from GEOTRACES cruise KN193-06 for Intercalibration of sensors.	GEOTRACES IC	sigma_t
CTD TM_Rosette Nutrients Chl	CTD, TM Rosette CTD, nutrients and chlorophyll data	IronExII	Sigmat
CTD_ak_ltop	AK-LTOP CTD cast data	NEP	sigma_t
CTD_BC_PS	SeaBird SeaCat SBE-19 CTD profiler data from bottle casts (BC)	SOFeX	sigma_t
CTD_bottle	CTD hydrography data from bottle casts for euphotic zone experiments	CRD FLUZiE	sigma_t
CTD_cg	CTD data from R/V Endeavor and R/V Oceanus, Gulf of Maine, 1997-1999.	GB	sigma_t
CTD_cgoa process cruises	CTD data from process cruises	NEP	sigma_t
CTD_Cokelet eco FOCI cruises	CTDs from one cruise per year from the NE Pacific	NEP	sigma_t
CTD_cruise	CTD data from the Cruise CD-ROMS	SOGLOBEC	sigma_t
CTD_dg	CTD data from EN321 and EN325, Georges Bank, 1999.	GB	sigma_t
CTD_dh	Seward Johnson CTD casts, Georges Bank, 1995	GB	sigma_t
CTD_MOCNESS1	CTD MOCNESS data including calibrated oxygen from the Arabian Sea.	Arabian Sea	sigma
CTD_pmel FOCI cruises	CTD files (netcdf format originally) from NOAA/PMEL FOCI cruises	NEP	sigma_t
CTD_sbe_dh	Seward Johnson CTD casts - from Seabird CTD, Georges Bank, 1995.	GB	sigma_t
CTD_transect_PS	CTD profile data from Polar Star Transect 1	SOFeX	sigma_t
CTD_Weicker	CTD data from 5 stations in Fisher's Island Sound	CiliateSequencing	sigma_t
Database Profile Data Products	Database Profile Data Products	ON DEQUE	Density_sigma_t
DeZoZoo CTD Data	Processed CTD data from all six cruises of the DeZoZoo project	DeZoZoo	sigma_t, density_diff
Digitized Nutrient profiles from the Warm Core Ring Program		Warm Core Rings	sigmaT
Dissolved O2 and Potential Density	Dissolved Oxygen potential density measurements from 3 cruises.	Lophelia OA	potential_density
Doliolid diet: CTD casts	CTD data from SAV-15-10, SAV-15-19, SAV-15-31	Doliolid Diet	Density_sigma_t_kg_m3
dye_bh	Scanfish data from dye injection, OC342, Georges Bank, 1999	GB	sigma_t
ETSP N2O	ETSP N2O	Microbial Nitrification	sigma_T
fishlarvae_Bon_bss	Georges Bank Fish Larvae, Growth Rates, Protein Content and Otolith Data Collected from BONGO Nets, 1995-1999.	GB	sigma_t_avg
fishlarvae_Bon_pro	Georges Bank Fish Larvae, Growth Rates, Protein Content and Otolith Data Collected from BONGO Nets, 1993-1999.	GB	sigma_t_avg
fishlarvae_M1	Georges Bank Fish Larvae, Growth Rates, Protein Content and Otolith Data Collected from MOCNESS Tows, 1992-1999.	GB	sigma_t_avg
hydrography	Nutrient data from the western Gulf of Maine (bottles)	REACH	sigma_t
McMurdo Sound CTDs	CTD casts in McMurdo Sound	McMurdo Predator Prey	sigma_t
microstructd06	microstructure data SJ9506 deep site	GB	sigma_t
microstructd08	microstructure data SJ9508 deep site	GB	sigma_t
microstructs06	microstructure data SJ9506 shallow site	GB	sigma_t
microstructs08	microstructure data SJ9508 shallow site	GB	sigma_t
Mixed Layer	Mixed Layer	BLOOFINZ-IO	Sigma_t
MOCNESS plankton composition and CTD data	Species composition via MOCNESS and associated CTD information	CopesPopDynHypoZone	CTD_sigma_t
mooring_ef	Mooring data from the Eastern Flank Mooring (EF) deployed by R. Limeburner	GB	sigma_t
MUSiCC OC1504A - CTD Data	CTD data from the OC1504A cruise	Diatom Silicification	sigma_theta00, sigma_theta11
MV1405 Q Incubations	Q incubation data from MV1405	Diatom Iron Storage	relative_sigma
NH1208_alongtrack	underway data from RV/New Horizon 1208	OAPS	sigma_t
Niskin bottle hydrography	hydrographic measurements from Niskin bottle samples	CORSACS	sigma_t
Niskin bottle samples	Niskin bottle and CTD data; nutrients, oxygen, DIC, POC, PON	EDDIES	sigma_t
Niskin bottle samples	CARIACO time series Niskin bottle sample data	CARIACO	Sigma_t
Niskin CTD hydrography - IC1	Niskin bottle basic hydrography from CTD from first GEOTRACES Intercalibration cruise.	GEOTRACES IC	sigma_t
Niskin plankton composition and CTD data	Species composition via niskin and associated CTD information	CopesPopDynHypoZone	sigma_t00
nmfs_CTDsb	Seabird 911 CTD	GB	sigmat
Nutrient and hydrology data	Nutrient and hydrology CTD data	WHCOHH Algal Bloom Dynamics	Density
nutrients	Nutrient pump observations	NABE	sigma_t
Nutrients and pigments	Nutrients and pigments	FADCO	Sigma_Theta
OC1703A CTD	CTD	Deep Sediment N Fix	sigma_t
ODV and CTD	ODV and CTD	TRACERS	sigmatheta, max_sigmatheta_change
PF_CTD	Pre Fertilization (PF) CTD profile data	SEEDS I	Sigma_t00
PULSE CTD data	CTD data from the PULSE project, 2003-2008, Gulf of Maine	NEC-CoopRes	density
R/V Falkor 160115 ProteOMZ Trace Metal Rosette Data	Hydrographic data files from the SeaBird SBE19 CTD mounted on the trace metal rosette (TMR).	ProteOMZ (Proteomics in an Oxygen Minimum Zone)	Sigma-E00
SAB CTD Profiles for STP, DO, pH	Vertical profiles of water quality parameters at sampling stations in the South Atlantic Bight during 2015-2020.	SAB BMA	Sigma_t
scanfish	Scanfish data	GB	sigma_t
SeaSoar	SeaSoar CTD and Fluorometer	AESOPS	sigma_t
seasoar_CTD	SeaSoar CTD observations	GB	sigma_t_ctd
SF6 Discrete - Station/Niskin Sort	SF6 Discrete - Station/Niskin Sort	SO_GasEx	sigma_t
Species composition with CTD data: 5 daytrips	Species composition with CTD data: 5 daytrips	CopesPopDynHypoZone	sigma_t00
st2mooring	ST2 mooring parameters	GB	sigma_t
TMCTD	Processed CTD data from TM casts	AESOPS	sigma_t
Underway - MET	Underway - MET	GATEKEEPERS	SD
underway_met_NH	underway MET data collected on GLOBEC LTOP cruises aboard R/V New Horizon	NEP	sigma_t
VPR_ashjian_alt	Display of Video Plankton Recorder data where taxa are not diplayed in separate columns	GB	sigma_t
VPR_ashjian_nonzero	Video Plankton Recorder data where abundances of zero have been removed from dipslay	GB	sigma_t
VPR_ashjian_orig	Video Plankton Recorder data	GB	sigma_t
winter nitrate isotopes - hydrocast	Wintertime nitrate delta 15N and delta 18O from hydrocasts in the Southern Ocean south of Africa.	Diatom-bound_N_Isotopes	sigma_t
WS1010_CTD	CTD data from cruise WS1010 in the Gulf of Mexico, May-June 2010.	DWH_Deep_Microbes	sigma_t

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-t