Dataset: CTD cast log for mussel study

Name: CTD cast log from casts before and after larval vertical distribution sampling from R/V C-Hawk day cruises in the Eastern Gulf of Maine from 2012 to 2014
Published: 2019-12-16
Keywords: oceans

Cite This Dataset

DOI:10.1575/1912/bco-dmo.783749.1

Spatial Extent: N:44.6609108 E:-67.3390943 S:44.4050113 W:-67.653471

Temporal Extent: 2012-08-01 - 2014-08-07

Project:

Intertidal community assembly and dynamics: Integrating broad-scale regional variation in environmental forcing and benthic-pelagic coupling (GOMEPRO)

Principal Investigator:

Philip O. Yund (Downeast Institute for Applied Marine Research and Education, DEI)

BCO-DMO Data Manager:

Amber D. York (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2019-12-16

Restricted:

Validated:

Yes

Current State:

Final no updates expected

CTD cast log from casts before and after larval vertical distribution sampling from R/V C-Hawk day cruises in the Eastern Gulf of Maine from 2012 to 2014

Abstract:

CTD cast log from casts before and after larval vertical distribution sampling from R/V C-Hawk day cruises in the Eastern Gulf of Maine from 2012 to 2014.

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Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2019-12-16	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.1575/1912/bco-dmo.783749.1	2020-01-03

Description

CTD cast log from casts before and after larval vertical distribution sampling from R/V C-Hawk day cruises in the Eastern Gulf of Maine from 2012 to 2014. These data were presented in Weinstock et al., 2018 (see Fig 1 and 2).

Related Datasets: CTD casts were conducted immediately before and after the associated larval vertical distribution sampling (separate dataset description) and on both flood and ebb tides.
* CTD data for mussel study: https://www.bco-dmo.org/dataset/783736
* Mussel Larvae Vertical Distribution: https://www.bco-dmo.org/dataset/783755

Methods & Sampling

Conductivity, temperature, and depth were sampled via an instrument cast from a small boat. Casts were conducted immediately before and after the associated larval vertical distribution sampling (see ) and on both flood and ebb tides. For more information see the open-access publication Weinstock et al., 2018.

Each cast_name includes the date and tidal phase combination with names including “mm_dd_yy tidephase cast”. The first cast was conducted immediately before the larval vertical distribution sampling described in the accompanying dataset file, and the second cast was conducted immediately after larval sampling. An additional descriptor stating the site name (e.g. MB1) is included in the cast_name from 8/16/12 onwards when two different sites were sampled on the same date.

CTD sampling information

Device: CC1223007
Sample type: Cast
Default latitude: 32
Default altitude: 0
Pressure calibration date: 2012-05-31
Temperature calibration date: 2012-06-01
Conductivity calibration date: 2012-06-01
Samples per second: 5

C-Hawk cruise date/site combinations

Date Site
8/1/12 MB1
8/16/12 MB1 & MB2
8/22/12 WB1
7/31/13 WB2
7/22/14 WB3
8/5/14 WB3
8/6/14 WB3
8/7/14 WB3

BCO-DMO Processing

* 25 csv files for each cast combined into one tabular dataset (see CTD dataset https://www.bco-dmo.org/dataset/783736). The information in the comment lines in each file was extracted and turned into this CTD cast log dataset.
* "cast_name" column added which contains information in the original filenames which included "mm_dd_yy_tidephase_cast.csv"
* added a conventional header with dataset name, PI name, version date
* modified parameter names to conform with BCO-DMO naming conventions (spaces, +, and - changed to underscores). Units in parentheses were removed and added to the Parameter Description metadata section.
* blank values in this dataset are displayed as "nd" for "no data." nd is the default missing data identifier in the BCO-DMO system.
* Start and end altitude, GPS horizontal and vertical error rounded to two decimal places
* Data sorted by time
* Electronics calibration date column was removed because it is not a valid date 0001-01-01
* The following column values were added to Methods & Sampling metadata instead of a data column because they are all the same value.

Data Files

File
ctd_larvae_log.csv (Comma Separated Values (.csv), 6.42 KB) MD5:d501320a83ae326cdfa74c7d7660a6b1 Primary data file for dataset ID 783749

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1458188

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
Yund_GoME		2012-08-01	R/V C-HAWK	Philip O. Yund (Principal Investigator)	data info

Instruments

None available yet

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
Start_latitude	Cast start latitiude	decimal degrees	lat
Start_longitude	Cast start longitude	decimal degrees	lon
End_latitude	Cast end latitiude	decimal degrees	lat
End_longitude	Cast end longitude	decimal degrees	lon
End_GPS_horizontal_error	Cast end GPS horizontal error	meters	sample_descrip
End_GPS_vertical_error	Cast end GPS vertical error	meters	sample_descrip
Start_altitude	Cast start altitude	meters	altitude
Start_GPS_horizontal_error	Cast start GPS horizontal error	meters	sample_descrip
Start_GPS_vertical_error	Cast start GPS vertical error	meters	sample_descrip
End_altitude	Cast end altitude	meters	altitude
End_GPS_number_of_satellites	Number of GPS satellites at end of cast	per satellite	sample_descrip
Start_GPS_number_of_satellites	Number of GPS satellites at start of cast	per satellite	sample_descrip
Cast_duration	Cast duration (seconds between start and end of cast)	seconds	time_elapsed
cast_name	Cast name. Name includes the date/tidal phase combination, with file names formatted mm_dd_yy_tidephase_cast. Site name is added where multiple sites sampled in one day.	unitless	cast
File_name	File name CTD data originally recorded to.	unitless	file_name
Cast_time_UTC	Cast date and time (UTC) in ISO 8601 format yyyy-mm-ddTHH:MM:SSZ	unitless	ISO_DateTime_UTC
Cast_time_local	Cast date and time (local,UTC-4) in format yyyy-mm-dd HH:MM:SS	unitless	DateTime
Cast_data	Cast data (Raw or Down)	unitless	sample_descrip
Location_source	GPS location source (GPS or Manual)	unitless	sample_descrip