M01_corrected_nitrate_csv
eng
UTF8
dataset
service
Ru Morrison
NERACOOS
603-319-1785
195 New Hampshire Ave.
Portsmouth
NH
03801
USA
info@neracoos.org
pointOfContact
2024-03-18
ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
4
column
row
vertical
temporal
M01 SUNA - Nitrate Observations Corrected
2024-03-18
creation
www.neracoos.org
M01_corrected_nitrate_csv
David Townsend
University of Maine School of Marine Sciences
davidt@maine.edu
http://www.neracoos.org/nutrientobservatory
information
web browser
Background Information
Background information from the source
information
originator
Various nitrate sensors including the SUNA V1, SUNA V2 and ISUS (Sea-Bird Scientific) were deployed on NERACOOS Buoy M (Latitude: 43° 29.44'N and Longitude: 67° 52.79'W) from June 23, 2013 to March 23, 2021. This time period corresponds to University of Maine buoy deployments M0124, M0125, M0126, M0127, M0129, and M130 (http://gyre.umeoce.maine.edu/data/gomoos/buoy/html/M01.html). These sensors were placed at the surface, 1m, 50m, 100m, 150m and 250m and programmed to collect nitrate measurements six times per day (0045, 0445, 0845, 1245, 1645 and 2045 GMT) over a fixed sampling window of 30 seconds at approximately 1.4 readings per second. The number of sensors and their depths varied for each deployment depending on the number of available sensors. Five measurements recorded in the middle of the 30 second data stream were transmitted back to the University of Maine Physical Oceanography Group via cell phone. The mean concentration and standard deviation were calculated for each specific sampling time. If the standard deviation for a mean was greater than 2µM, the values were eliminated. Surviving data were then quality controlled (QCed) by removing outliers assessed as values less than -0.5µM and greater than 30µM. Whenever possible at the time of buoy deployment and recovery, a standard CTD cast was conducted with a carousel water sampler equipped with Niskin bottles. Ground truth water samples were collected at the same depth as the nitrate sensors. These samples were analyzed for nitrate concentrations at the University of Maine using a Bran Luebbe AA3 Autoanalyzer and standard techniques. Ground truth corrections were added or subtracted as an offset only if the difference between the nitrate concentration of the water sample collected and the mean nitrate sensor reading at approximately the same time was greater than 2 µM. Upon recovery of the instruments, the data was processed using the software provided by Sea-Bird (UCI.com) and compared with the real-time measurements as a check for accuracy. In the event that the sensor was not able to transmit in real-time, the processed data was QCed. Please contact David Townsend, davidt@maine.edu, University of Maine, School of Marine Sciences if you have any questions.
David Townsend
University of Maine School of Marine Sciences
davidt@maine.edu
http://www.neracoos.org/nutrientobservatory
information
web browser
Background Information
Background information from the source
information
pointOfContact
buoy
chemistry
concentration
data
day
desc
deviation
dissolved
dissolved nutrients
e01
earth
hour
identifier
maine
minute
mole
month
mooring
n02
nitrate
no3
nutrients
ocean
oceans
science
sea
seawater
second
site
standard
station
statistics
suna
two
umol
university
water
year
theme
Earth Science > Oceans > Ocean Chemistry > Nitrate
theme
GCMD Science Keywords
University of Maine School of Marine Sciences
project
time
mole_concentration_of_nitrate_in_sea_water
mole_concentration_of_nitrate_in_sea_water
latitude
longitude
depth
theme
CF Standard Name Table v29
The data may be used and redistributed for free but is not intended
for legal use, since it may contain inaccuracies. Neither the data
Contributor, ERD, NOAA, nor the United States Government, nor any
of their employees or contractors, makes any warranty, express or
implied, including warranties of merchantability and fitness for a
particular purpose, or assumes any legal liability for the accuracy,
completeness, or usefulness, of this information.
University of Maine School of Marine Sciences
largerWorkCitation
project
Unidata Common Data Model
Point
largerWorkCitation
project
eng
geoscientificInformation
1
-67.88
-67.8798
43.4907
43.491
seconds
2013-06-23T16:45:00Z
2021-03-24T00:45:00Z
-250.0
-1.0
M01 SUNA - Nitrate Observations Corrected
2024-03-18
creation
David Townsend
University of Maine School of Marine Sciences
davidt@maine.edu
http://www.neracoos.org/nutrientobservatory
information
web browser
Background Information
Background information from the source
information
originator
Various nitrate sensors including the SUNA V1, SUNA V2 and ISUS (Sea-Bird Scientific) were deployed on NERACOOS Buoy M (Latitude: 43° 29.44'N and Longitude: 67° 52.79'W) from June 23, 2013 to March 23, 2021. This time period corresponds to University of Maine buoy deployments M0124, M0125, M0126, M0127, M0129, and M130 (http://gyre.umeoce.maine.edu/data/gomoos/buoy/html/M01.html). These sensors were placed at the surface, 1m, 50m, 100m, 150m and 250m and programmed to collect nitrate measurements six times per day (0045, 0445, 0845, 1245, 1645 and 2045 GMT) over a fixed sampling window of 30 seconds at approximately 1.4 readings per second. The number of sensors and their depths varied for each deployment depending on the number of available sensors. Five measurements recorded in the middle of the 30 second data stream were transmitted back to the University of Maine Physical Oceanography Group via cell phone. The mean concentration and standard deviation were calculated for each specific sampling time. If the standard deviation for a mean was greater than 2µM, the values were eliminated. Surviving data were then quality controlled (QCed) by removing outliers assessed as values less than -0.5µM and greater than 30µM. Whenever possible at the time of buoy deployment and recovery, a standard CTD cast was conducted with a carousel water sampler equipped with Niskin bottles. Ground truth water samples were collected at the same depth as the nitrate sensors. These samples were analyzed for nitrate concentrations at the University of Maine using a Bran Luebbe AA3 Autoanalyzer and standard techniques. Ground truth corrections were added or subtracted as an offset only if the difference between the nitrate concentration of the water sample collected and the mean nitrate sensor reading at approximately the same time was greater than 2 µM. Upon recovery of the instruments, the data was processed using the software provided by Sea-Bird (UCI.com) and compared with the real-time measurements as a check for accuracy. In the event that the sensor was not able to transmit in real-time, the processed data was QCed. Please contact David Townsend, davidt@maine.edu, University of Maine, School of Marine Sciences if you have any questions.
ERDDAP tabledap
1
-67.88
-67.8798
43.4907
43.491
seconds
2013-06-23T16:45:00Z
2021-03-24T00:45:00Z
-250.0
-1.0
tight
ERDDAPtabledapDatasetQueryAndAccess
http://www.neracoos.org/erddap/tabledap/M01_corrected_nitrate_csv
ERDDAP:tabledap
ERDDAP-tabledap
ERDDAP's tabledap service (a flavor of OPeNDAP) for tabular (sequence) data. Add different extensions (e.g., .html, .graph, .das, .dds) to the base URL for different purposes.
download
M01 SUNA - Nitrate Observations Corrected
2024-03-18
creation
David Townsend
University of Maine School of Marine Sciences
davidt@maine.edu
http://www.neracoos.org/nutrientobservatory
information
web browser
Background Information
Background information from the source
information
originator
Various nitrate sensors including the SUNA V1, SUNA V2 and ISUS (Sea-Bird Scientific) were deployed on NERACOOS Buoy M (Latitude: 43° 29.44'N and Longitude: 67° 52.79'W) from June 23, 2013 to March 23, 2021. This time period corresponds to University of Maine buoy deployments M0124, M0125, M0126, M0127, M0129, and M130 (http://gyre.umeoce.maine.edu/data/gomoos/buoy/html/M01.html). These sensors were placed at the surface, 1m, 50m, 100m, 150m and 250m and programmed to collect nitrate measurements six times per day (0045, 0445, 0845, 1245, 1645 and 2045 GMT) over a fixed sampling window of 30 seconds at approximately 1.4 readings per second. The number of sensors and their depths varied for each deployment depending on the number of available sensors. Five measurements recorded in the middle of the 30 second data stream were transmitted back to the University of Maine Physical Oceanography Group via cell phone. The mean concentration and standard deviation were calculated for each specific sampling time. If the standard deviation for a mean was greater than 2µM, the values were eliminated. Surviving data were then quality controlled (QCed) by removing outliers assessed as values less than -0.5µM and greater than 30µM. Whenever possible at the time of buoy deployment and recovery, a standard CTD cast was conducted with a carousel water sampler equipped with Niskin bottles. Ground truth water samples were collected at the same depth as the nitrate sensors. These samples were analyzed for nitrate concentrations at the University of Maine using a Bran Luebbe AA3 Autoanalyzer and standard techniques. Ground truth corrections were added or subtracted as an offset only if the difference between the nitrate concentration of the water sample collected and the mean nitrate sensor reading at approximately the same time was greater than 2 µM. Upon recovery of the instruments, the data was processed using the software provided by Sea-Bird (UCI.com) and compared with the real-time measurements as a check for accuracy. In the event that the sensor was not able to transmit in real-time, the processed data was QCed. Please contact David Townsend, davidt@maine.edu, University of Maine, School of Marine Sciences if you have any questions.
OPeNDAP
1
-67.88
-67.8798
43.4907
43.491
seconds
2013-06-23T16:45:00Z
2021-03-24T00:45:00Z
-250.0
-1.0
tight
OPeNDAPDatasetQueryAndAccess
http://www.neracoos.org/erddap/tabledap/M01_corrected_nitrate_csv
OPeNDAP:OPeNDAP
OPeNDAP
An OPeNDAP service for tabular (sequence) data. Add different extensions (e.g., .html, .das, .dds) to the base URL for different purposes.
download
M01 SUNA - Nitrate Observations Corrected
2024-03-18
creation
David Townsend
University of Maine School of Marine Sciences
davidt@maine.edu
http://www.neracoos.org/nutrientobservatory
information
web browser
Background Information
Background information from the source
information
originator
Various nitrate sensors including the SUNA V1, SUNA V2 and ISUS (Sea-Bird Scientific) were deployed on NERACOOS Buoy M (Latitude: 43° 29.44'N and Longitude: 67° 52.79'W) from June 23, 2013 to March 23, 2021. This time period corresponds to University of Maine buoy deployments M0124, M0125, M0126, M0127, M0129, and M130 (http://gyre.umeoce.maine.edu/data/gomoos/buoy/html/M01.html). These sensors were placed at the surface, 1m, 50m, 100m, 150m and 250m and programmed to collect nitrate measurements six times per day (0045, 0445, 0845, 1245, 1645 and 2045 GMT) over a fixed sampling window of 30 seconds at approximately 1.4 readings per second. The number of sensors and their depths varied for each deployment depending on the number of available sensors. Five measurements recorded in the middle of the 30 second data stream were transmitted back to the University of Maine Physical Oceanography Group via cell phone. The mean concentration and standard deviation were calculated for each specific sampling time. If the standard deviation for a mean was greater than 2µM, the values were eliminated. Surviving data were then quality controlled (QCed) by removing outliers assessed as values less than -0.5µM and greater than 30µM. Whenever possible at the time of buoy deployment and recovery, a standard CTD cast was conducted with a carousel water sampler equipped with Niskin bottles. Ground truth water samples were collected at the same depth as the nitrate sensors. These samples were analyzed for nitrate concentrations at the University of Maine using a Bran Luebbe AA3 Autoanalyzer and standard techniques. Ground truth corrections were added or subtracted as an offset only if the difference between the nitrate concentration of the water sample collected and the mean nitrate sensor reading at approximately the same time was greater than 2 µM. Upon recovery of the instruments, the data was processed using the software provided by Sea-Bird (UCI.com) and compared with the real-time measurements as a check for accuracy. In the event that the sensor was not able to transmit in real-time, the processed data was QCed. Please contact David Townsend, davidt@maine.edu, University of Maine, School of Marine Sciences if you have any questions.
ERDDAP Subset
1
-67.88
-67.8798
43.4907
43.491
seconds
2013-06-23T16:45:00Z
2021-03-24T00:45:00Z
-250.0
-1.0
tight
ERDDAP_Subset
http://www.neracoos.org/erddap/tabledap/M01_corrected_nitrate_csv.subset
search
Subset
Web page to facilitate selecting subsets of the dataset
download
physicalMeasurement
station
String
Station
time
double
Time
Year
short
Year
Month
byte
Month
Day
byte
Day
Hour
byte
Hour
Minute
byte
Minute
Second
byte
Second
Nitrate_umol
float
Mole Concentration Of Nitrate In Sea Water
Standard_Deviation
float
Standard Deviation(umol)
Nitrate
float
Mole Concentration Of Nitrate In Sea Water
mooring_site_desc
String
Mooring Site Desc
water_depth
float
Water Depth
Ru Morrison
NERACOOS
603-319-1785
195 New Hampshire Ave.
Portsmouth
NH
03801
USA
info@neracoos.org
distributor
OPeNDAP
DAP/2.0
http://www.neracoos.org/erddap/tabledap/M01_corrected_nitrate_csv.html
order
Data Subset Form
ERDDAP's version of the OPeNDAP .html web page for this dataset. Specify a subset of the dataset and download the data via OPeNDAP or in many different file types.
download
http://www.neracoos.org/erddap/tabledap/M01_corrected_nitrate_csv.graph
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This record was created from dataset metadata by ERDDAP Version 1.82