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GLAD experiment CODE-style drifter trajectories (low-pass filtered, 15 minute interval records), northern Gulf of Mexico near DeSoto Canyon, July-October 2012Consortium for Advanced Research on Transport of Hydrocarbon in the Environment (CARTHE)
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Suggested Citation:
Özgökmen, Tamay. 2013. GLAD experiment CODE-style drifter trajectories (low-pass filtered, 15 minute interval records), northern Gulf of Mexico near DeSoto Canyon, July-October 2012. Distributed by: Gulf of Mexico Research Initiative Information and Data Cooperative (GRIIDC), Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/N7VD6WC8
Abstract:
297 trajectories from near-surface CODE-type ocean drifters (drogued at a depth of one meter) tracked in real-time using SPOT GPS units, launched in the northern Gulf of Mexico near DeSoto Canyon in July 2012 as part of the CARTHE Grand Lagrangian Deployment (GLAD) experiment. Most of these drifters were launched as triplets (separated by roughly 100 meters at launch) in an attempt to measure multi-scale near surface dispersion. Positions are low-pass filtered (one hour cutoff period) and interpolated to uniform 15 minute intervals starting on whole hours over the period July 20 through October 22, 2012. No temperature or salinity sensors were attached to these drifters. This dataset was created by the Consortium for Advanced Research on Transport of Hydrocarbon in the Environment (CARTHE). This research was made possible by a grant from BP/The Gulf of Mexico Research Initiative.
Purpose:
Triads of CODE style drifters (initially separated by roughly 100 meteres) were launched nearly simultaneously to measure near-surface relative dispersion over scales ranging from 100 meters to 100 km.
Theme Keywords:
drifters, dispersion, submesoscale, surface transport, CODE drifter, drifter, transport, oil spill, trajectories
File Format:
dat, txt
Filename:
GLAD_15min_filtered.zip (44.04 MB)
Dataset Downloads:
94
GLAD experiment CODE-style drifter trajectories (low-pass filtered, 15 minute interval records), northern Gulf of Mexico near DeSoto Canyon, July-October 2012
Identification Information
Distribution Information
Metadata Maintenance Information
Metadata:
File identifier:
R1.x134.073-0004-metadata.xml
Language:
eng; USA
Character set:
Character set code:
utf8
Hierarchy level:
Scope code:
dataset
Metadata author:
Responsible party:
Individual name:
Ed Ryan
Organisation name:
University of Miami / Rosenstiel School of Marine and Atmospheric Science
Position name:
Senior Research Associate
Contact info:
Contact:
Phone:
Telephone:
Voice:
3054214109
Facsimile:
Address:
Address:
Delivery point:
4600 Rickenbacker Cswy
City:
Miami
Administrative area:
Florida
Postal code:
33149
Country:
USA
Electronic mail address:
eryan@rsmas.miami.edu
Role:
Role code:
principalInvestigator
Date stamp:
2018-08-11T13:37:14+00:00
Metadata standard name:
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
Metadata standard version:
ISO 19115-2:2009(E)
Dataset URI:
https://data.gulfresearchinitiative.org/metadata/R1.x134.073:0004
Return To Index
Identification info:
Data identification:
Citation:
Citation:
Title:
GLAD experiment CODE-style drifter trajectories (low-pass filtered, 15 minute interval records), northern
Gulf of Mexico near DeSoto Canyon, July-October 2012
Alternate title:
GLAD experiment CODE-style drifter trajectories (low-pass filtered, 15 minute interval records)
Date:
Date:
Date:
2013-08-23
Date type:
Date type code:
publication
Identifier:
Identifier:
Code:
Anchor: xlink: https://dx.doi.org/10.7266/N7VD6WC8 title: DOI
doi:10.7266/N7VD6WC8
Abstract:
297 trajectories from near-surface CODE-type ocean drifters (drogued at a depth of one meter) tracked in
real-time using SPOT GPS units, launched in the northern Gulf of Mexico near DeSoto Canyon in July 2012 as
part of the CARTHE Grand Lagrangian Deployment (GLAD) experiment. Most of these drifters were launched as
triplets (separated by roughly 100 meters at launch) in an attempt to measure multi-scale near surface
dispersion. Positions are low-pass filtered (one hour cutoff period) and interpolated to uniform 15 minute
intervals starting on whole hours over the period July 20 through October 22, 2012. No temperature or
salinity sensors were attached to these drifters. This dataset was created by the Consortium for Advanced
Research on Transport of Hydrocarbon in the Environment (CARTHE). This research was made possible by a grant
from BP/The Gulf of Mexico Research Initiative.
Purpose:
Triads of CODE style drifters (initially separated by roughly 100 meteres) were launched nearly simultaneously
to measure near-surface relative dispersion over scales ranging from 100 meters to 100 km.
Status:
Progress code:
completed
Point of contact:
Responsible party:
Individual name:
Brian Haus
Organisation name:
University of Miami / Rosenstiel School of Marine and Atmospheric Science
Position name:
Professor
Contact info:
Contact:
Phone:
Telephone:
Voice:
3054214932
Facsimile:
Address:
Address:
Delivery point:
4600 Rickenbacker Causeway
City:
Miami
Administrative area:
Florida
Postal code:
33149
Country:
USA
Electronic mail address:
bhaus@rsmas.miami.edu
Role:
Role code:
principalInvestigator
Descriptive keywords:
Keywords:
Keyword:
drifters
Keyword:
dispersion
Keyword:
submesoscale
Keyword:
surface transport
Keyword:
CODE drifter
Keyword:
drifter
Keyword:
transport
Keyword:
oil spill
Keyword:
trajectories
Type:
Keyword type code:
theme
Descriptive keywords:
Keywords:
Keyword:
Gulf of Mexico
Keyword:
De Soto Canyon
Type:
Keyword type code:
place
Resource constraints: title: Cite As
Constraints:
Use limitation:
Özgökmen, Tamay. 2013. GLAD experiment CODE-style drifter trajectories (low-pass filtered, 15 minute
interval records), northern Gulf of Mexico near DeSoto Canyon, July-October 2012. Distributed by: Gulf
of Mexico Research Initiative Information and Data Cooperative (GRIIDC), Harte Research Institute, Texas
A&M University–Corpus Christi. doi:10.7266/N7VD6WC8
Resource constraints: title: CC0 License
Legal constraints:
Use constraints:
Restriction code:
licenceUnrestricted
Other constraints:
This information is released under the Creative Commons license - No Rights Reserved - CC0 1.0 Universal
(https://creativecommons.org/publicdomain/zero/1.0/). The person who associated a work with this deed
has dedicated the work to the public domain by waiving all of his or her rights to the work worldwide
under copyright law, including all related and neighboring rights, to the extent allowed by law. You can
copy, modify, distribute and perform the work, even for commercial purposes, all without asking
permission.
Resource constraints: title: Liability and Warranty
Legal constraints:
Other constraints:
All materials on this website are made available to GRIIDC and in turn to you "as-is." Content may only be
submitted by an individual who represents and warrants that s/he has sufficient rights to be able to
make the content available under a CC0 waiver. There is no warranty (expressed or implied) to these
materials, their title, accuracy, non-infringement of third party rights, or fitness for any particular
purpose, including the performance or results you may obtain from their use. Use these materials at your
own risk. Under no circumstances shall GRIIDC be liable for any direct, incidental, special,
consequential, indirect, or punitive damages that result from the use or the inability to use either
this website or the materials available via this website. If you are dissatisfied with any website
feature, content, or terms of use, your sole and exclusive remedy is to discontinue use.
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Language:
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Topic category:
Topic category code:
oceans
Topic category:
Topic category code:
environment
Extent:
Extent:
Geographic element:
Geographic bounding box:
West bound longitude:
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East bound longitude:
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South bound latitude:
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North bound latitude:
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-84.6372 24.0332 -84.1116 24.5299 -83.4966 24.2857 -82.8662 24.2288 -82.4289 24.2315 -82.2385
24.4316 -83.1649 24.6959 -83.2792 25.2287 -83.9684 26.0197 -85.1509 26.2678 -84.9802 26.4406
-85.036 26.7152 -85.1428 26.7707 -84.8704 26.8126 -84.8145 27.0031 -84.5725 27.0425 -84.4541
26.7961 -84.4616 26.7886 -84.4 26.8963 -84.0853 26.9578 -83.9541 27.2019 -83.9043 27.3727
-83.9149 27.6121 -83.94 27.8806 -83.9829 28.1455 -83.9299 28.5458 -84.1643 28.7557 -84.2419
28.8762 -84.2232 28.8769 -84.2237 29.131 -84.4609 29.179 -84.5163 29.1795 -84.517 29.1897
-84.5549 28.9535 -84.7369 28.9992 -84.7559 29.0068 -84.7628 29.0333 -84.8041 29.0177 -84.9858
29.0773 -84.9474 29.1177 -84.9877 29.1185 -85.0127 29.0882 -85.0534 29.0552 -85.052 28.9537
-84.9913 28.9198 -85.0042 29.1768 -85.281 29.274 -85.4083 29.3012 -85.3878 29.3744 -85.3659
29.4413 -85.3802 29.4629 -85.331 29.4704 -85.3061 29.5524 -85.3312 29.578 -85.3415 29.5935
-85.3633 29.6477 -85.4079 29.6585 -85.4185 29.6588 -85.4191 29.884 -85.9419 29.8848 -85.9437
29.8855 -85.9455 29.8862 -85.9473 29.8924 -85.9638 29.893 -85.9657
Temporal element:
Temporal extent:
Extent:
Time period:
Description:
ground condition
Begin date:
2012-07-20
End date:
2012-10-22
Supplemental Information:
Column 1: drifter ID string (like CARTHE_XXX, XXX=3 digit integer) Column 2: date (yyyy-mm-dd) Column 3: time
(HH:MM:SS.SS) Column 4: latitude (decimal degrees) Column 5: longitude (decimal degrees) Column 6: estimated
position error (meters) Column 7: u (east-west) velocity (m/sec) Column 8: v (north-south) velocity (m/sec)
Column 9: estimated velocity error (m/sec) |GLAD CODE drifter positions were reported in real-time roughly
every five minutes via the Globalstar satellite network. Positions reported by the SPOT handheld GPS units
inside each drifter were nominally accurate to within seven meters. Occasionally, position errors much
larger than this nominal value are found. These may be due to errors in GPS baselines (due to poor satellite
reception), data dropout, and, in some cases, drifters that were picked up by small boats. Each drifter
record ends when the drifter was known to be picked up by a boat, when the signal was lost for more than 24
hours, or when the drifter traveled more than 80 km in a 12 hours period (implying a mean speed of 1.85
m/sec over 12 hours). For each record, positions that imply an instantaneous drifter speed greater than 3
m/sec were deleted. Also, positions that imply the drifter track rotated through more than 360 compass
degrees within three hours were deleted. Next, outliers were identified as positions that were more than 100
meters away from estimated positions at the same times interpolated from a set of both past and future
positions. These outliers were deleted. All valid positions were then interpolated to uniform, five-minute
time intervals using spline interpolation. These five-minute records were used to compute finite difference
estimates of u (east-west) and v (north-south) velocities. Finally, the five-minute position and velocity
records were filtered using a Butterworth fourth-order low-pass filter with a one hour period cutoff. These
low-pass filtered records were then interpolated to uniform 15-minute intervals beginning on whole hours.
Crude estimates of position error are also provided for each position in the final 15-minute interval
records. The error was set to 10 meters (a nominal value) for positions recorded at times for which there
were no gaps in the five-minute raw data records over the previous hour. The error was increased according
to the ratio of the average sample time interval for the previous 12 raw data positions to the nominal
sample interval of 5 minutes, multiplied by the 10 meter nominal error value. Velocity errors were computed
by dividing the sum of two consecutive position errors by the corresponding time interval.|CODE II drifter
body with SPOT Satellite GPS Messenger (orange).|Raw drifter positions were low-pass filtered (one hour
cutoff period) and interpolated to uniform 15 minute intervals starting on whole hours.||
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Distribution info:
Distribution:
Distributor:
Distributor:
Distributor contact:
Responsible party:
Organisation name:
Gulf of Mexico Research Initiative Information and Data Cooperative (GRIIDC)
Contact info:
Contact:
Phone:
Telephone:
Voice:
3618253604
Address:
Address:
Delivery point:
6300 Ocean Drive
City:
Corpus Christi
Administrative area:
TX
Postal code:
78412
Country:
USA
Electronic mail address:
griidc@gomri.org
Online Resource:
Online Resource:
Linkage:
URL:
https://data.gulfresearchinitiative.org
Role:
Role code:
distributor
Distributor format:
Format:
Name:
dat, txt
Version:
inapplicable
File decompression technique:
zip
Distributor transfer options:
Digital transfer options:
Transfer size:
44.0409
Online:
Online Resource:
Linkage:
URL:
https://data.gulfresearchinitiative.org/data/R1.x134.073:0004
Protocol:
https
Name:
Data Landing Page
Description:
GRIIDC dataset landing page
Function:
Online function code:
information
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Metadata maintenance:
Maintenance information:
Maintenance and update frequency:
unknown
Maintenance note:
This ISO metadata record was automatically generated from information provided to GRIIDC for dataset:
R1.x134.073:0004 on 2020-12-01T11:52:10-06:00
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