Dataset: Nutrients - OPA NH4 Data

Name: Nutrients: OPA NH4+ Analysis from R/V New Horizon cruise NH1008 in Monterey Bay, near MBARI buoy M1 (36.747?N, 122.022?W); 2010 (GATEKEEPERS project)
Published: 2012-09-20
Keywords: oceans

Cite This Dataset

Spatial Extent: N:36.770333 E:-122.006833 S:36.454833 W:-123.351

Project:

Zooplankton feeding at the base of the particle maximum: Gatekeepers of the Vertical Flux? (GATEKEEPERS)

Principal Investigator:

David M. Checkley (University of California-San Diego, UCSD-SIO)

Co-Principal Investigator:

Michael Dagg (Louisiana Universities Marine Consortium, LUMCON)

George A. Jackson (Texas A&M University, TAMU)

Contact:

David M. Checkley (University of California-San Diego, UCSD-SIO)

BCO-DMO Data Manager:

Stephen R. Gegg (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

20 September 2012

Version Date:

2012-09-20

Validated:

Current State:

Final no updates expected

Nutrients: OPA NH4+ Analysis from R/V New Horizon cruise NH1008 in Monterey Bay, near MBARI buoy M1 (36.747?N, 122.022?W); 2010 (GATEKEEPERS project)

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Description

Nutrients - OPA NH4+ Analysis

Methods & Sampling

OPA Method for NH4+ Analysis

Data Processing Description

OPA Method for NH4+ Analysis

BCO-DMO Processing/Edits
- Generated from original file "NH4_OPA_27Aug2012_JFB.xls" contributed by Jessica Forrest-Baldini
- CTD UTC Date, UTC Time, Lat, Lon inserted from CTD station data (CTD headers)
- PDT Date reformatted to YYYYMMDD
- Parameter names modified to conform to BCO-DMO conventions (blanks to underscores, etc.)
- "nd" (no data) inserted in black cells

Data Files

File
Nuts_OPA_NH4.csv (Comma Separated Values (.csv), 3.23 KB) MD5:9aeafd9852ea66fe028825d40fbb0b2c Primary data file for dataset ID 3723

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-0927863
NSF Division of Ocean Sciences	OCE-0928139
NSF Division of Ocean Sciences	OCE-0928425

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
NH1008	GATEKEEPERS	2010-07-08	R/V New Horizon	David M. Checkley (Chief Scientist)	data info

Instruments

CTD Sea-Bird SBE 911plus

Supplied Description:

Instrument Type

Generic Name: CTD Sea-Bird SBE 911plus

Acronym: CTD SBE 911plus

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0058/

Generic Description:

The Sea-Bird SBE 911 plus is a type of CTD instrument package for continuous measurement of conductivity, temperature and pressure. The SBE 911 plus includes the SBE 9plus Underwater Unit and the SBE 11plus Deck Unit (for real-time readout using conductive wire) for deployment from a vessel. The combination of the SBE 9 plus and SBE 11 plus is called a SBE 911 plus. The SBE 9 plus uses Sea-Bird's standard modular temperature and conductivity sensors (SBE 3 plus and SBE 4). The SBE 9 plus CTD can be configured with up to eight auxiliary sensors to measure other parameters including dissolved oxygen, pH, turbidity, fluorescence, light (PAR), light transmission, etc.). more information from Sea-Bird Electronics

Niskin bottle

Supplied Description:

Instrument Type

Generic Name: Niskin bottle

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0412/

Generic Description:

A Niskin bottle (a next generation water sampler based on the Nansen bottle) is a cylindrical, non-metallic water collection device with stoppers at both ends. The bottles can be attached individually on a hydrowire or deployed in 12, 24, or 36 bottle Rosette systems mounted on a frame and combined with a CTD. Niskin bottles are used to collect discrete water samples for a range of measurements including pigments, nutrients, plankton, etc.

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
Time	CTD Time from Header File (UTC)	HHMMSS	time
NH4	Ammonia	umol/L	NH4
Longitude	CTD Longitude from Header File (West is negative)	decimal degrees	lon
Latitude	CTD Latitude from Header File (South is negative)	decimal degrees	lat
ISO_DateTime_UTC	CTD Date/Time from Header File (UTC) ISO formatted	YYYY-MM-DDTHH:MM:SS.xxZ	ISO_DateTime_UTC
Depth	Sample Depth	meters	depth
Date	CTD Date from Header File (UTC)	YYYYMMDD	date
CTD_Start_Time	CTD Start Time (PDT)	HHMM	time_begin
CTD_Start_Date	CTD Start Date (PDT)	YYYYMMDD	date_begin
CTD_Cast	CTD Cast Number/Id	Dimensionless	cast

Status message

Database

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Dataset: Nutrients - OPA NH4 Data