Dataset: TI668 alongtrack

Name: Alongtrack data from RV/Tioga cruise TI668, full water-column to the Wilkinson Basin, Gulf of Maine, May 2013 (Gulf of Maine Pteropods project, GoME OA Pteropods project)
Published: 2021-06-10
Keywords: oceans

Cite This Dataset

Spatial Extent: N:42.7249 E:-69.5719 S:41.5194 W:-70.6945

Project:

Acidification of the Coastal Ocean: Are deep waters of the Gulf of Maine already corrosive to pteropods? (GoME OA Pteropods)

Seasonal and Ontogenetic Effects of Ocean Acidification on Pteropods in the Gulf of Maine (Gulf of Maine Pteropods)

Program:

Science, Engineering and Education for Sustainability NSF-Wide Investment (SEES): Ocean Acidification (formerly CRI-OA) (SEES-OA)

Chief Scientist:

Zhaohui Aleck Wang (Woods Hole Oceanographic Institution, WHOI)

BCO-DMO Data Manager:

Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2021-06-10

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Alongtrack data from RV/Tioga cruise TI668, full water-column to the Wilkinson Basin, Gulf of Maine, May 2013 (Gulf of Maine Pteropods project, GoME OA Pteropods project)

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Description

This alongtrack data set contains information on environmental conditions for each day of the RV/Tioga cruise TI668 to the Gulf of Maine, May 2013.

Methods & Sampling

Alongtrack measurements were made continuously during the course of the cruise. Data collection was handled by a number of computers and custom software programs, including Calliope, the central program which collects, logs, and distributes the data. Sea surface temperature, salinity, and fluorescence data were collected once per minute upon leaving port. Atmospheric measurements of air temperature, barometric pressure, wind speed and direction, and other meteorological variables were also collected along with time, latitude, and longitude once per minute. These data were saved on the ship’s server on a daily basis.

Data Processing Description

BCO-DMO Processing Notes and Edits: Parameter names were modified to conform to BCO-DMO convention. Replaced 'nan' and '-999' with 'nd', where applicable. Leading spaces in front of values were deleted. [Time was converted from HH:MM:SS format to GMT format. day_gmt, month_gmt, year, and yrday_new were added (computed based on date column).]

The following parameters were removed from display:
- GPS_UT - redundant with date and time
- secondary wind speed (WX_TS) - no good values reported; only a few 4.3 values
- secondary wind direction (WX_TSD) - no good values reported; only a few 255 values
- HdChkSum=6 - column used for QC only

BCO-DMO data manager processing notes:
* Parameter info removed for "temp_hull" which is not a column in the dataset.
* Added parameter info for date_gps

Version 2 (2021-06-10) replaces version 1 (2013-11-20).
* Made the following changes in source file "TI130520_00.csv" line 651.
* Values for wind_speed and wind_dir were replaced with missing data value "nd" since the values were "bad" characters not numeric values. Converted to utf-8.

Data Files

File
alongtrack_TI668.csv (Comma Separated Values (.csv), 1.60 MB) MD5:f24be8098d506c9cf0ac549119cc321c Primary data file for dataset ID 472104

More Information about this dataset

Funding Sources

Funding Source	Award Number
WHOI	COI-2012: Wang,Lawson,Maas

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
TI668		2013-05-21	R/V Tioga	Zhaohui Aleck Wang (Chief Scientist) Gareth Lawson (Co-Chief Scientist) Amy Maas (Co-Chief Scientist) Amy Maas (Contact)	data info

Instruments

Fluorometer

Supplied Description:

Instrument Type

Generic Name: Fluorometer

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/113/

Generic Description:

A fluorometer or fluorimeter is a device used to measure parameters of fluorescence: its intensity and wavelength distribution of emission spectrum after excitation by a certain spectrum of light. The instrument is designed to measure the amount of stimulated electromagnetic radiation produced by pulses of electromagnetic radiation emitted into a water sample or in situ.

Global Positioning System Receiver

Supplied Name: GPS

Supplied Description:

Instrument Type

Generic Name: Global Positioning System Receiver

Acronym: GPS

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/POS03/

Generic Description:

The Global Positioning System (GPS) is a U.S. space-based radionavigation system that provides reliable positioning, navigation, and timing services to civilian users on a continuous worldwide basis. The U.S. Air Force develops, maintains, and operates the space and control segments of the NAVSTAR GPS transmitter system. Ships use a variety of receivers (e.g. Trimble and Ashtech) to interpret the GPS signal and determine accurate latitude and longitude.

MicroTSG Thermosalinograph

Supplied Name: MicroTSG

Supplied Description:

Sea-Bird SBE45

Instrument Type

Generic Name: MicroTSG Thermosalinograph

Acronym: MicroTSG

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/133/

Generic Description:

An externally powered, high-accuracy instrument, designed for shipboard determination of sea surface (pumped-water) conductivity and temperature. Salinity and sound velocity can also be computed.

Sea-Bird SBE 48 Hull Temperature Sensor

Supplied Name: SBE48

Supplied Description:

Instrument Type

Generic Name: Sea-Bird SBE 48 Hull Temperature Sensor

Acronym: SBE 48

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/134/

Generic Description:

The SBE 48 is a high-accuracy temperature recorder with non-volatile memory, designed for shipboard determination of sea surface temperature. Installed with magnets just below the water line, the SBE 48's temperature sensor is in contact with the inside of the ship's hull. For more information, see the SBE48 Manual.

Weather Transmitter

Supplied Name: WXT520

Supplied Description:

Instrument Type

Generic Name: Weather Transmitter

Acronym: WXT520

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/102/

Generic Description:

The ship-mounted Vaisala Weather Transmitter WXT520 measures: Wind speed and direction; Liquid precipitation: rainfall, duration, intensity; Barometric pressure; Air temperature and Relative humidity. (for more information see http://www.vaisala.com/en/products/multiweathersensors/Pages/WXT520.aspx)

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
cruise_id	cruise identification	unitless	cruise_id
date	date as year/month/day (GMT time)	yyyymmdd	date
time	Time GMT; 24 hour clock. [Values converted from HH:MM:SS format to HHMM.SS format.]	HH:MM:SS	time
lat	Latitude; negative = South.	decimal degrees	lat
lon	Longitude; negative = West.	decimal degrees	lon
temp_air_port	Air temperature in degrees C. Obtained from Vaisala WXT520 mounted on port side forward mast xx m above waterline. Name changed from 'WXTP_Ta' during processing.	degrees C	temp_air
press_bar_port	Barometric pressure obtained from WXT520 mounted on the port side forward mast xx m above sea level. Data has been corrected for sensor altitude. Name changed from 'WXTP_Pa' during processing.	hPa	press_bar
depth_w	Depth in meters obtained from the Knudsen 200 kHz channel. x meter transducer depth correction has been applied.??? Name changed from 'Depth200' during processing.	m	depth_w
cog	Course over ground (true); best source; obtained from a Garmin GPS receiver.	degrees (azimuth)	cog
sog	Speed over ground (best source) obtained from a Garmin GPS receiver. Name changed from 'SOG' during processing.	knots	sog
precip_port	Rain accumulation in mm. Data obtained from Vaisala WXT520 mounted on port side forward mast xx m above waterline.The accumulation value is reset only when the sensor power is reset. Name changed from 'WXTP_Rc' during processing.	mm	precip_level
precip_rate_port	Rain intensity in mm/hour obtained from Vaisala WXT520 mounted on port side forward mast xx m above waterline. Name changed from 'WXTP_Ri' during processing.	mm/hr	precip_rate
humidity_port	Relative humidity (%) obtained from Vaisala WXT520 mounted on port side forward mast at xx m above water line. Name changed from 'WXTP_Ua' during processing.	%	humidity
wind_dir_r_port	Relative wind direction from port side. Data obtained from Vaisala WXT520 and has not been corrected for sensor mounting alignment error. A 0-degree wind comes over the bow; 90-degree wind comes over the stbd side. Name changed from 'WXTP_Dm' during processing.	degrees	wind_dir_r
wind_speed_r_port	Relative wind speed from port side obtained from Vaisala WXT520. Wind speed average in m/s (2 Hz; 10 sec sample period). Name changed from 'WXTP_Sm' during processing.	m/s	wind_speed_r
cond_mS	Surface conductivity from the SBE45 thermosalinograph. Name changed from 'SBE45C' during processing.	mS/cm	cond_mS
flr	Fluorescence measured by WetLabs Wet-Star fluorometer located in the Wet Lab clean seawater piping. Units are counts (1 volt dc = 1000).	counts	flr
sal_ss	Sea surface salinity measured by SBE45 thermosalinograph. Name changed from 'SBE45S' during processing.	PSU	sal_ss
sound_vel	Surface sound velocity from the SBE45 thermosalinograph. Name changed from 'SBE45SV' during processing.	m/s	sound_vel
temp_ss	Sea surface temperature measured by SBE45T thermosalinograph sensor. Name changed from 'SBE45T' during processing.	degrees C	SST
head	The ship's heading obtained from true heading source (gyro). Name changed from 'HDT' during processing.	degrees(azimuth)	heading
wind_direction	Wind direction. Name changed from 'WXWnd_dir' during processing.	degrees	wind_dir
wind_speed	Wind speed. Name changed from 'WXWnd_spd' during processing.	m/s	wind_speed
wind_dir_c_port	True wind direction in degrees from port side. Values are calculated from the Vaisala WXT520. Raw data corrected for sensor alignment error and combined with the ship's gyro heading and sog and cog values. A 0-degree wind comes from the north. Name changed from 'WXTP_TD' during processing.	degrees	wind_dir_c
wind_speed_c_port	True wind speed from port side. Values calculated from the Vaisala WXT520. Raw data corrected for sensor alignment error and combined with the ship's heading and sog and cog values.Name changed from "WXTP_TS" during processing.	m/s	wind_speed_c
yrday_gmt	GMT day and decimal time, as 326.5 for the 326th day of the year, or November 22 at 1200 hours (noon).		yrday_gmt
day	day, UTC		day
month	month, UTC		month
year	year		year
ISO_DateTime_UTC	Date/Time (UTC) ISO formatted, based on ISO 8601:2004(E).		ISO_DateTime_UTC
date_gps	GPS date in format ddmmyy (e.g. 180513 for May 18th, 2013).	unitless	date

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Dataset: TI668 alongtrack