Dataset: alongtrack

Name: Alongtrack data from ship's Data Acquisition System (DAS) from R/V Thomas G. Thompson cruise TN277 in the Eastern North Pacific Ocean in 2012 (POWOW project)
Published: 2021-06-16
Keywords: oceans

Cite This Dataset

DOI:10.1575/1912/bco-dmo.3758.1

Spatial Extent: N:32.70665 E:-117.225355 S:21.247275 W:-158.342478

Temporal Extent: 2012-03-01 - 2012-03-11

Project:

Seasonal and decadal changes in temperature drive Prochlorococcus ecotype distribution patterns (POWOW)

Chief Scientist:

Zackary I. Johnson (Duke University)

Co-Chief Scientist:

Erik Zinser (University of Tennessee Knoxville, UTK)

Contact:

Zackary I. Johnson (Duke University)

BCO-DMO Data Manager:

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

Version:

Version Date:

2021-06-16

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Alongtrack data from ship's Data Acquisition System (DAS) from R/V Thomas G. Thompson cruise TN277 in the Eastern North Pacific Ocean in 2012 (POWOW project)

Abstract:

Alongtrack data from ship's Data Acquisition System (DAS) from R/V Thomas G. Thompson cruise TN277 in the Eastern North Pacific Ocean in 2012. Data were collected along the cruise track from the ship's IMET sensors, thermosalinograph, Knudesn, and GPS.

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Archival Copy

Version Date	Archive	Persistent Identifier (PID)	Date PID Issued
2012-10-24	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.1575/1912/bco-dmo.3758.1	2019-03-15

Description

Data collected along the cruise track from the ship's IMET sensors, thermosalinograph, Knudesn, and GPS. Unprocessed ADCP, gravity, and multibeam underway data are also available from BCO-DMO upon request by emailing info@bco-dmo.org. These are raw data that cannot be served online in their current format.

Methods & Sampling

The DAS system collects data at an operator selected interval; this interval is usually set at 1 sample every 5 seconds. The data are collected from IMET sensors, SBE-21 Thermosalinagraph, EM302 or Knudsen, C-Nav GPS and Winch systems. The data are time, date and position tagged. A new file is started each day at GMT 0:00 and ends at 23:59:55 (depending on the data storage interval). Filename extensions are Julian Day. (From University of Washington vessel information)

Thermosalinograph calibration data for DAS data follows:
Conductivity calibration coefficients:
m = 4.6
a = 0.00000523250085
b = 0.49686504
c = -4.21206317
d = -0.0000877310216

Temperature calibration coefficients:
f = 2610.082
a = 0.00364763429
b = 0.000596620785
c = 0.0000159326489
d = 0.00000120111676

External Temperature calibration coefficients:
f = 2676.423
a = 0.00368121106
b = 0.00058938925
c = 0.0000151014632
d = 0.00000122956892

PAR sensor calibration coefficient:
dry = 1.63E-17

Data Processing Description

BCO-DMO made the following modifications:
- Parameter names were changed to conform to BCO-DMO conventions.
- Blanks were replaced with 'nd'.
- + signs preceding latitude values were removed.
- lat and lon values that were obviously erroneous were replaced with 'nd' (e.g. negative latitude values, longitude values of -500).
- humidity and sea surface temperature columns were removed because all values were nd (humidity) and -9.999, or -2 (sea surface temp).
- Values containing unreadable characters were replaced with 'nd'.

* Data Version 2 (2021-06-09) replaces version 1 (2012-10-24). There was an unsupported characters in the dataset source files which are assumed to be a corrupt value after trying to read them in over 900 different encoding types. The "bad" characters were changed to "nd" the default missing data identifier.

Below are the line changes between versions 1 and 2. The lines starting with plus sign are the new lines in version 2, the lines starting with a minus are the version 1 lines.

--- dataset_3758_v1.tsv
+++ dataset_3758_v2.tsv
@@ -54464,7 +54464,7 @@
-064 03 04 2012 0757.92 04-03-2012 25.831145 -145.675022 21.468 4.9915 35.400 5247.1 0.076 4.696 0001.0 0000.8 1ù—37 1017.9 11.2 106.3 22.5 014.3 10.9 107.5 1526.0 074.5 074.2 08.7 12.5 02 000.0 -008.9 00095.5 2012-03-04T07:57:55Z
+064 03 04 2012 0757.92 04-03-2012 25.831145 -145.675022 21.468 4.9915 35.400 5247.1 0.076 4.696 0001.0 0000.8 nd 1017.9 11.2 106.3 22.5 014.3 10.9 107.5 1526.0 074.5 074.2 08.7 12.5 02 000.0 -008.9 00095.5 2012-03-04T07:57:55Z
@@ -65557,7 +65557,7 @@
-064 03 04 2012 2325.58 04-03-2012 26.571587 -142.663568 20.504 4.8893 35.378 4759.5 0.072 4.689 1270.0 0885.4 ñ7.85 1015.3 07.6 124.9 18.4 018.7 08.5 131.0 1523.4 076.2 075.6 05.7 12.4 02 000.0 -009.2 00120.3 2012-03-04T23:25:35Z
+064 03 04 2012 2325.58 04-03-2012 26.571587 -142.663568 20.504 4.8893 35.378 4759.5 0.072 4.689 1270.0 0885.4 nd 1015.3 07.6 124.9 18.4 018.7 08.5 131.0 1523.4 076.2 075.6 05.7 12.4 02 000.0 -009.2 00120.3 2012-03-04T23:25:35Z
@@ -71913,7 +71913,7 @@
-065 03 05 2012 0815.25 05-03-2012 26.146975 -140.810162 20.923 4.9380 35.422 4720.9 0.074 4.691 0001.0 1þ5 18.9 1017.7 11.3 134.4 23.6 011.6 11.8 132.2 1524.5 110.5 110.1 09.1 12.9 02 000.0 -009.2 00091.0 2012-03-05T08:15:15Z
+065 03 05 2012 0815.25 05-03-2012 26.146975 -140.810162 20.923 4.9380 35.422 4720.9 0.074 4.691 0001.0 nd 18.9 1017.7 11.3 134.4 23.6 011.6 11.8 132.2 1524.5 110.5 110.1 09.1 12.9 02 000.0 -009.2 00091.0 2012-03-05T08:15:15Z
@@ -87281,7 +87281,7 @@
-066 03 06 2012 0542.58 06-03-2012 24.848662 -136.652917 20.132 4.8288 35.195 5032.6 0.076 4.696 0001.0 à-0.7 17.9 1019.7 13.8 076.6 25.3 343.0 14.6 081.7 1522.1 110.6 111.0 08.0 12.5 02 000.0 -009.9 00112.8 2012-03-06T05:42:35Z
+066 03 06 2012 0542.58 06-03-2012 24.848662 -136.652917 20.132 4.8288 35.195 5032.6 0.076 4.696 0001.0 nd 17.9 1019.7 13.8 076.6 25.3 343.0 14.6 081.7 1522.1 110.6 111.0 08.0 12.5 02 000.0 -009.9 00112.8 2012-03-06T05:42:35Z
@@ -105902,7 +105902,7 @@
-067 03 07 2012 0734.33 07-03-2012 23.781255 -132.425820 19.106 4.6547 34.614 nd 0.073 4.703 0001.0 H1.4 17.0 1018.4 21.8 058.8 28.7 003.1 20.4 061.3 1518.6 055.8 057.1 06.4 06.9 02 000.0 -010.4 00074.7 2012-03-07T07:34:20Z
+067 03 07 2012 0734.33 07-03-2012 23.781255 -132.425820 19.106 4.6547 34.614 nd 0.073 4.703 0001.0 nd 17.0 1018.4 21.8 058.8 28.7 003.1 20.4 061.3 1518.6 055.8 057.1 06.4 06.9 02 000.0 -010.4 00074.7 2012-03-07T07:34:20Z
@@ -149559,7 +149559,7 @@
-069 03 09 2012 2012.42 09-03-2012 30.263440 -122.986535 14.635 4.0720 33.315 3947.6 0.078 4.626 1131.0 0798.2 ð13.64 1021.9 11.4 000.7 11.7 359.7 11.5 000.4 1503.6 000.2 113.9 00.1 00.1 02 -061.0 1742.5 01723.5 2012-03-09T20:12:25Z
+069 03 09 2012 2012.42 09-03-2012 30.263440 -122.986535 14.635 4.0720 33.315 3947.6 0.078 4.626 1131.0 0798.2 nd 1021.9 11.4 000.7 11.7 359.7 11.5 000.4 1503.6 000.2 113.9 00.1 00.1 02 -061.0 1742.5 01723.5 2012-03-09T20:12:25Z
@@ -167691,7 +167691,7 @@
-070 03 10 2012 2123.42 10-03-2012 31.680522 -119.604473 14.455 4.0676 33.430 3666.6 0.095 4.470 1187.0 0915.5 ð12.26 1015.3 19.4 306.0 17.3 268.8 19.8 307.4 1503.2 062.3 067.6 08.3 08.8 02 000.0 -010.5 00087.1 2012-03-10T21:23:25Z
+070 03 10 2012 2123.42 10-03-2012 31.680522 -119.604473 14.455 4.0676 33.430 3666.6 0.095 4.470 1187.0 0915.5 nd 1015.3 19.4 306.0 17.3 268.8 19.8 307.4 1503.2 062.3 067.6 08.3 08.8 02 000.0 -010.5 00087.1 2012-03-10T21:23:25Z

Data Files

File
alongtrack_TN277.csv (Comma Separated Values (.csv), 38.99 MB) MD5:56b0feffbf9c1a8236d09f32dfc5bcc6 Primary data file for dataset ID 3758

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-1031064
NSF Division of Ocean Sciences	OCE-1030518

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
TN277	POWOW1	2012-02-29	R/V Thomas G. Thompson	Zackary I. Johnson (Chief Scientist) Erik Zinser (Co-Chief Scientist) Zackary I. Johnson (Contact)	data info

Instruments

Fluorometer

Supplied Description:

See the WetLabs ECO Fluorometer chacterization sheet (PDF) from TN277 (POWOW1) cruise.

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.

Thermosalinograph

Supplied Description:

SBE 21 SeaCAT Thermosalinograph measured conductivity and temperature. Refer to the following (PDFs) from the TN277 (POWOW1) cruise:
Temperature calibration data
Temperature calibration report
Conductivity calibration data
Conductivity calibration report

Instrument Type

Generic Name: Thermosalinograph

Acronym: TSG

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

Generic Description:

A thermosalinograph (TSG) is used to obtain a continuous record of sea surface temperature and salinity. On many research vessels the TSG is integrated into the ship's underway seawater sampling system and reported with the underway or alongtrack data.

WET Labs {Sea-Bird WETLabs} C-Star transmissometer

Supplied Name: Wet Labs CSTAR Transmissometer

Supplied Description:

See the WetLabs C-Star calibration sheet (PDF) from the TN277 (POWOW1) cruise.

Instrument Type

Generic Name: WET Labs {Sea-Bird WETLabs} C-Star transmissometer

Acronym: WL CSTAR Trans

Community Identifier: http://vocab.nerc.ac.uk/collection/L22/current/TOOL0160/

Generic Description:

The C-Star transmissometer has a novel monolithic housing with a highly intgrated opto-electronic design to provide a low cost, compact solution for underwater measurements of beam transmittance. The C-Star is capable of free space measurements or flow-through sampling when used with a pump and optical flow tubes. The sensor can be used in profiling, moored, or underway applications. Available with a 6000 m depth rating.

More information on Sea-Bird website: https://www.seabird.com/c-star-transmissometer/product?id=60762467717

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
yrday	Yearday (GMT).	unitless	yrday
month_gmt	Month of year (GMT).	mm (01 to 12)	month_gmt
day_gmt	Day of month (GMT).	dd (01 to 31)	day_gmt
year	4-digit year. in YYYY format	unitless	year
time_gmt	Nav computer GMT time.	HH:MM:SS	time_gmt
date_gmt	Nav computer GMT date. format: dd-mm-YYYY	unitless	date
lat	Nav computer latitude; positive = north.	decimal degrees	lat
lon	Nav computer longitude; positive = east.	decimal degrees	lon
temp	Thermosalinograph temperature.	degrees Celsius	temp
cond	Thermosalinograph conductivity.	Seimens/meter	cond
sal	Thermosalinograph salinity.	PSU	sal
depth_w	Water depth.	meters	depth_w
chl_raw	Thermosalinograph chlorophyll.	volts	chl_raw
light_trans_v	Thermosalinograph light transmission.	volts	trans_v
PAR	PAR in microEinsteins per square meter per second.	uE/m^2/sec	PAR
radiation_s	IMET short wave radiation.	watts/square meter	radiation_s
temp_air	IMET air temperature.	degrees Celsius	temp_air
press_bar	IMET barometric pressure	millibars	press_bar
wind_speed	True wind speed.	knots	wind_speed
wind_dir	True wind direction.	degrees	wind_dir
wind_speed_r	Relative wind speed.	knots	wind_speed_r
wind_dir_r	Relative wind direction.	degrees	wind_dir_r
wind_speed_avg	Average true wind speed.	knots	no_bcodmo_term
wind_dir_avg	Average true wind direction.	degrees	no_bcodmo_term
sound_vel	Sound velocity.	meters/second	sound_vel
head	Gyro compass heading	degrees true	heading
cog	Nav computer course over ground.	degrees true	cog
speedlog	Doppler speed log.	knots	no_bcodmo_term
sog	Nav computer speed over ground.	knots	sog
winch_no	Winch ID number: 0 = Hydro Winch 1; 1 = Trawl Winch; 2 = Hydro Winch 2.	unitless	no_bcodmo_term
wire_out	Number of meters of wire out.	meters	wire_out
wire_rate	Wire rate.	meters/minute	no_bcodmo_term
wire_tension	Wire tension in pounds.	lbs	no_bcodmo_term
ISO_DateTime_UTC	Date/Time (UTC) ISO8601 formatted. T indicates start of time string; Z indicates UTC.	yyyy-MM-dd'T'HH:mm:ss'Z'	ISO_DateTime_UTC

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Dataset: alongtrack