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Instrument: Secchi Disc

Acronym: Secchi Disc

External Identifier: skos:closeMatch: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0430/

Description

Typically, a 16 inch diameter white/black quadrant disc used to measure water optical clarity

Datasets (13)

Dataset Name	PI-Supplied Description	PI-Supplied Name
Microbial abundance, activity, and nutrient concentrations in Delaware Bay from R/V Hugh R. Sharp HRS090706DK in the Delaware Bay from July 2009 (Active bacteria in surface waters project)		Secchi Disc
Ammonia and urea-derived-N oxidation rates measured using 15N additions from San Pedro Ocean Time-series (SPOT) measured between 2014 to 2016		secchi disk
Winter survey data from Lake Erie from Mar 2023 to May 2024	A Secchi disc with measurement indicators every 10 centimeters will then be deployed and recordings will be taken on both the upcast and downcast.	Secchi disc
Effects of Hurricane Harvey in San Antonio Bay-Hydrography data, Feb. 2017 - July 2019
Biological, chemical, and physical water quality indicators of the Neuse River, North Carolina from 2008 through 2013	The secchi disk was deployed off of the sunlit side of the research vessel. The depth (in meters) at which the secchi disk was no longer visible by the naked eye was recorded as the secchi depth.	secchi disk
N2O concentrations from San Pedro Ocean Time-series (SPOT) measured between 2014 to 2016		secchi disk
CTD data, bottle nutrients, and chlorophyll-a from phytoplankton taxa from R/V Pelican PE08-54, PE09-12, PE10-01 in the Northwest Florida shelf off Panama City FL. from 2008-2009 (BenDiM project)		Secchi Disc
Primary production from the San Pedro Ocean Time-series (SPOT) measured between 2014 to 2016		secchi disk
Compilation of primary productivity measurements collected from 1983-2006 from the Ross Sea	Irradiance was determined largely using an in situ PAR sensor, but earlier cruises also used a Secchi disk.	Secchi disk
Secchi depth optical clarity from the R/V Kilo Moana KM0701 cruise in the South Pacificduring 2007 (WP2 project)	At approximately local noon, a 16 inch diameter white/black quadrant disc was lowered from the ship’s deck until no longer visible and this depth (in meters) recorded as the Secchi depth	Secchi Disc
Secchi depth measurements from the PICO time-series station (34.7181 deg N, 76.6707 deg W) from 2010-2012 (PICO project)	A 20 cm secchi disk with four alternating white and black quadrants was used.	Secchi Disc
Time series observations: hydrography, nutrients, and microbial, phytoplankton and zooplankton communities from the Skidaway River Estuary on the southeastern Atlantic coast of Georgia from 1986-2011 (SRiMP project)	Since early 2011, weekly Secchi depth measurements were included in the SRiMP program	Secchi Disc
Sample logs from the Fixed Station cruises of the TRANSPORT program on R/V Hugh R. Sharp (HRS110714EN, HRS120711EN) in the Choptank River, Chesapeake Bay during 2011-2012 (TRANSPORT project)