Dataset: TI725 alongtrack
Deployment: TI725

Alongtrack data from RV/Tioga cruise TI725 to the Gulf of Maine, January 2014

Principal Investigator:

Amy Maas (Woods Hole Oceanographic Institution, WHOI)

BCO-DMO Data Manager:

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

Project:

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

Current State:

Final no updates expected

Version Date:

2014-02-17

Data URL:

https://www.bco-dmo.org/dataset-deployment/511487/data

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Description

This alongtrack data set contains information on environmental conditions for each day of the RV/Tioga cruise TI725 to the Gulf of Maine, 10 January 2014.

This cruise was part of an ongoing seasonal time series of carbonate chemistry measurements in the Gulf of Maine. It was also an auxiliary cruise for the collection of the local population of thecosome pteropod, Limacina retroversa.

Methods & Sampling

Dataset acquisition description

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

Dataset 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).]

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1316040	NSF Division of Ocean Sciences

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:

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.

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

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. e.g. 326.5 is the 326th day of the year or November 22 at 1200 hours (noon).	unitless	yrday_gmt
day	day UTC	unitless	day
month	month UTC	unitless	month
year	year	unitless	year
ISO_DateTime_UTC	Date/Time (UTC) ISO formatted; based on ISO 8601:2004(E).	unitless	ISO_DateTime_UTC

Database

Contribute Data

Dataset: TI725 alongtrack
Deployment: TI725

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: TI725 alongtrackDeployment: TI725

Dataset acquisition description

Dataset Processing Description

Dataset: TI725 alongtrack
Deployment: TI725