Dataset: Water column CTD - Inside and outside kelp

Name: CTD casts paired with bi-weekly water sampling events at instrument mooring sites near the Monterey Peninsula, California, USA from June to August 2018 and 2019
Published: 2021-10-19
Keywords: oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.863637.1

Spatial Extent: N:36.63088 E:-121.897 S:36.61795 W:-121.9188

Temporal Extent: 2018-06-12 - 2019-08-02

Project:

Collaborative Research: RUI: Building a mechanistic understanding of water column chemistry alteration by kelp forests: emerging contributions of foundation species (Kelp forest biogeochemistry)

Principal Investigator:

Kerry J. Nickols (California State University Northridge, CSU-Northridge)

Co-Principal Investigator:

Robert B. Dunbar (Stanford University)

BCO-DMO Data Manager:

Shannon Rauch (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2021-10-19

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Data URL:

https://www.bco-dmo.org/dataset/863637/data

CTD casts paired with bi-weekly water sampling events at instrument mooring sites near the Monterey Peninsula, California, USA from June to August 2018 and 2019

Abstract:

These data were obtained from CTD casts paired with bi-weekly water sampling events at instrument mooring sites near the Monterey Peninsula, California, USA. Data were collected from June to August in 2018 and 2019.

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Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2021-10-19	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.863637.1	2022-08-23

Acquisition Description

Sampling Locations:
Sampling was conducted near the Monterey Peninsula near Pacific Grove and Monterey, California, USA. Kelp sites ranged from 8.8 to 10.3 meters deep and offshore sites ranged from 13.1 to 16.5 m deep.

Instrument moorings were deployed in 2018 in the following areas: a wave-protected kelp forest, ~100 meters offshore of the protected site, in a wave-exposed site devoid of kelp (historically has had kelp), and ~100 meters offshore of the exposed site.

Instrument moorings were deployed in 2019 in the following areas: a wave-protected kelp forest, ~175 meters offshore of the protected site, in a wave-exposed kelp site, and ~180 meters offshore of the exposed site.

Methodology:
CTD (SeaBird Electronics 19Plus V2 SeaCAT) casts were made at instrument moorings bi-weekly accompanied by discrete water sample collections. The CTD was first suspended ~1 meter below the surface for approximately 3 minutes to allow instruments to equilibrate. After 3 minutes, the CTD was raised to just below the surface and lowered to the seafloor at a rate of approximately 1 m/s. Once at the bottom, the CTD was pulled back up, pulled on the boat, and switched off. The CTD was thoroughly washed with fresh water after each day of use.

Processing Description

Data Processing:
Only the downcast data were used. Data have been binned by 0.5 meters.

BCO-DMO Processing:
- created date-time field in UTC;
- converted both date-time fields to ISO8601 format.

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1737176
NSF Division of Ocean Sciences	OCE-1737096

Deployments

None available yet

Instruments

CTD Sea-Bird SBE SEACAT 19plus

Supplied Name: SeaBird Electronics 19Plus V2 SeaCAT

Supplied Description:

Sensors: Temperature calibrated 14 Jan 2018,
Conductivity calibrated 14 Jan 2018,
Pressure calibrated 2 Jan 2018,
Oxygen calibrated 18 Jan 2018,
PAR log calibrated 30 Nov 2017,
Fluorometer calibrated 26 December 2017,
Turbidity calibrated 26 December 2017.

Instrument Type

Generic Name: CTD Sea-Bird SBE SEACAT 19plus

Acronym: Sea-Bird SEACAT 19 Plus

Generic Description:

Self contained self powered CTD profiler. Measures conductivity, temperature and pressure in both profiling (samples at 4 scans/sec) and moored (sample rates of once every 5 seconds to once every 9 hours) mode. Available in plastic or titanium housing with depth ranges of 600m and 7000m respectively. Minature submersible pump provides water to conductivity cell.

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
site	Site code: PK = Protected kelp 2018, PO = Protected offshore 2018, EK = Exposed kelp 2018, EO = Exposed offshore 2018, MK = Protected kelp 2019, MO = Protected offshore 2019, OK = exposed kelp 2019, OO = Exposed offshore 2019.	unitless	site
cast_time_PST	Cast time (PST) in ISO8601 format: YYYY-MM-DDThh:mm:ss Format: %Y-%m-%dT%H:%M:%S	unitless	ISO_DateTime_Local
cast_time_UTC	Cast time (UTC) in ISO8601 format: YYYY-MM-DDThh:mm:ssZ Format: %Y-%m-%dT%H:%M:%SZ	unitless	ISO_DateTime_UTC
time_zone	Indicates the local time zone (PST)	unitless	timezone
depth_0_tide	Depth of the site at at 0 tide	meters (m)	depth_w
latitude	Latitude	decimal degrees North	lat
longitude	Longitude	decimal degrees West	lon
location	Indicates if the location is Kelp or Offshore	unitless	site_descrip
timeJ	Time in Julian days	Julian days	julian_day
timeH	Time elapsed in hours	hours	time_elapsed
timeM	Time elapsed in minutes	minutes	time_elapsed
timeS	Time elapsed in seconds	seconds	time_elapsed
scan	Scan count	unitless	scan
depth	Depth (salt water)	meters	depth
pressure	Pressure	decibars	press
temperature	Temperature	degrees Celsius	temp
conductivity	Conductivity	Siemens per meter (S/m)	cond
salinity	Practical salinity	practical salinity units (PSU)	sal
density	Density	kilograms per cubic meter (kg/m^3)	density
oxygen	Oxygen in mg/L	milligrams per liter (mg/L)	O2
oxygen2	Oxygen in umol/kg	micromoles per kilogram (umol/kg)	O2
fluorescence	Fluorescence	milligrams per cubic meter (mg/m^3)	fluor
par_sat_log	Par/Logarithmic	unitless	PAR
turbidity	Turbidity	Nephelometric Turbidity unit (NTU)	turbidity
depth2	Depth (salt water)	meters (m)	depth
density2	Density	?	density
salinity2	Salinity	practical salinity units (PSU)	sal
flag	Inidicates issues with data: 0 = no issue, 1 = issue	unitless	q_flag

Database

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Dataset: Water column CTD - Inside and outside kelp