Easier access to realtime and historic NERACOOS buoy observations.
Brought to you by NOAA IOOS NERACOOS
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ERDDAP
Easier access to realtime and historic NERACOOS buoy observations. |
Brought to you by NOAA IOOS NERACOOS |
| griddap | Subset | tabledap | Make A Graph | wms | files | Title | Summary | FGDC | ISO 19115 | Info | Background Info | RSS | Institution | Dataset ID |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| http://www.neracoos.org/erddap/tabledap/E01_corrected_nitrate_csv.subset | http://www.neracoos.org/erddap/tabledap/E01_corrected_nitrate_csv | http://www.neracoos.org/erddap/tabledap/E01_corrected_nitrate_csv.graph | E01 SUNA - Nitrate Observations Corrected | Nitrate SUNA V2 sensors (Sea-Bird Scientific) were deployed on NERACOOS Buoy E (Latitude: 43 deg 42.87'N and Longitude: 69 deg 21.36'W) at 50m from June 6, 2015 to November 26, 2018. This time period corresponds to University of Maine buoy deployments E0133, E0134, E0135, E0136, E0137 and E0138 (http://gyre.umeoce.maine.edu/data/gomoos/buoy/html/E01.html). The sensors were programmed to collect nitrate measurements three times per day (0045, 0845 and 1645 GMT) and more recently, eight times day (0045, 0345, 0645, 0945, 1245, 1545, 1845, and 2145 GMT) over a fixed sampling window of 30 seconds at approximately 1.4 readings per second. 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 2uM, the values were eliminated. Surviving data were then quality controlled (QCed) by removing outliers assessed as values less than -0.5uM and greater than 15uM. Whenever possible at the time of buoy deployment and recovery, a standard CTD cast was conducted with a carrousel water sampler equipped with Niskin bottles. Ground truth water samples were collected at the same depth as the nitrate sensor. 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 uM. Upon recovery of the instruments, the data was processed using the software provided by Sea-Bird (UCI) 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, University of Maine, School of Marine Sciences if you have any questions.\n\ncdm_data_type = Point\nVARIABLES:\nstation\ntime (seconds since 1970-01-01T00:00:00Z)\nYear\nMonth\nDay\nHour\n... (10 more variables)\n | http://www.neracoos.org/erddap/metadata/fgdc/xml/E01_corrected_nitrate_csv_fgdc.xml | http://www.neracoos.org/erddap/metadata/iso19115/xml/E01_corrected_nitrate_csv_iso19115.xml | http://www.neracoos.org/erddap/info/E01_corrected_nitrate_csv/index.htmlTable | http://www.neracoos.org/nutrientobservatory | http://www.neracoos.org/erddap/rss/E01_corrected_nitrate_csv.rss | University of Maine School of Marine Sciences | E01_corrected_nitrate_csv | |||
| http://www.neracoos.org/erddap/tabledap/I01_corrected_nitrate_csv.subset | http://www.neracoos.org/erddap/tabledap/I01_corrected_nitrate_csv | http://www.neracoos.org/erddap/tabledap/I01_corrected_nitrate_csv.graph | I01 SUNA - Nitrate Observations Corrected | Nitrate SUNA V2 sensors (Sea-Bird Scientific) were deployed on NERACOOS Buoy I (Latitude: 44 deg 6.10'N and Longitude: 68 deg 6.73'W) at 50m from November 6, 2015 to December 3, 2018. This corresponds to University of Maine buoy deployments I0130, I0131, I0132, I0133 and I0134 (http://gyre.umeoce.maine.edu/data/gomoos/buoy/html/I01.html). The sensors were programmed to collect nitrate measurements three times per day (0045, 0845 and 1645 GMT) and more recently, eight times day (0045, 0345, 0645, 0945, 1245, 1545, 1845, and 2145 GMT) over a fixed sampling window of 30 seconds at approximately 1.4 readings per second. 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 2uM, the values were eliminated. Surviving data were then quality controlled (QCed) by removing outliers assessed as values less than -0.5uM and greater than 15uM. Whenever possible at the time of buoy deployment and recovery, a standard CTD cast was conducted with a carrousel water sampler equipped with Niskin bottles. Ground truth water samples were collected at the same depth as the nitrate sensor. 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 uM. Upon recovery of the instruments, the data was processed using the software provided by Sea-Bird (UCI) 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, University of Maine, School of Marine Sciences if you have any questions.\n\ncdm_data_type = Point\nVARIABLES:\nstation\ntime (seconds since 1970-01-01T00:00:00Z)\nYear\nMonth\nDay\nHour\n... (10 more variables)\n | http://www.neracoos.org/erddap/metadata/fgdc/xml/I01_corrected_nitrate_csv_fgdc.xml | http://www.neracoos.org/erddap/metadata/iso19115/xml/I01_corrected_nitrate_csv_iso19115.xml | http://www.neracoos.org/erddap/info/I01_corrected_nitrate_csv/index.htmlTable | http://www.neracoos.org/nutrientobservatory | http://www.neracoos.org/erddap/rss/I01_corrected_nitrate_csv.rss | University of Maine School of Marine Sciences | I01_corrected_nitrate_csv | |||
| http://www.neracoos.org/erddap/tabledap/M01_corrected_nitrate_csv.subset | http://www.neracoos.org/erddap/tabledap/M01_corrected_nitrate_csv | http://www.neracoos.org/erddap/tabledap/M01_corrected_nitrate_csv.graph | M01 SUNA - Nitrate Observations Corrected | 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, [email protected], University of Maine, School of Marine Sciences if you have any questions.\n\ncdm_data_type = Point\nVARIABLES:\nstation\ntime (seconds since 1970-01-01T00:00:00Z)\nYear\nMonth\n... (12 more variables)\n | http://www.neracoos.org/erddap/metadata/fgdc/xml/M01_corrected_nitrate_csv_fgdc.xml | http://www.neracoos.org/erddap/metadata/iso19115/xml/M01_corrected_nitrate_csv_iso19115.xml | http://www.neracoos.org/erddap/info/M01_corrected_nitrate_csv/index.htmlTable | http://www.neracoos.org/nutrientobservatory | http://www.neracoos.org/erddap/rss/M01_corrected_nitrate_csv.rss | University of Maine School of Marine Sciences | M01_corrected_nitrate_csv | |||
| http://www.neracoos.org/erddap/tabledap/N01_corrected_nitrate_csv.subset | http://www.neracoos.org/erddap/tabledap/N01_corrected_nitrate_csv | http://www.neracoos.org/erddap/tabledap/N01_corrected_nitrate_csv.graph | N01 SUNA - Nitrate Observations Corrected | One SUNA V2 and two ISUS (Sea-Bird Scientific) were deployed on NERACOOS Buoy N (Latitude: 42 deg 19.48'N and Longitude: 65 deg 54.55'W) at 50m, 100m and 180m, respectively, from July 26, 2016 to July 15, 2017. This corresponds to University of Maine buoy deployment N0120 (http://gyre.umeoce.maine.edu/data/gomoos/buoy/html/N01.html). The sensors were programmed to collect nitrate measurements three times per day (0045, 0845 and 1645 GMT) over a fixed sampling window of 30 seconds at approximately 1.4 readings per second. 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 2uM, the values were eliminated. Surviving data were then quality controlled (QCed) by removing outliers assessed as values less than -0.5uM and greater than 30uM. At the time of buoy deployment, a standard CTD cast was conducted with a carrousel 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 uM. Upon recovery of the instruments, the data was processed using the software provided by Sea-Bird (UCI and ISUS.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, University of Maine, School of Marine Sciences if you have any questions.\n\ncdm_data_type = Point\nVARIABLES:\nstation\ntime (seconds since 1970-01-01T00:00:00Z)\nYear\nMonth\nDay\nHour\nMinute\n... (9 more variables)\n | http://www.neracoos.org/erddap/metadata/fgdc/xml/N01_corrected_nitrate_csv_fgdc.xml | http://www.neracoos.org/erddap/metadata/iso19115/xml/N01_corrected_nitrate_csv_iso19115.xml | http://www.neracoos.org/erddap/info/N01_corrected_nitrate_csv/index.htmlTable | http://www.neracoos.org/nutrientobservatory | http://www.neracoos.org/erddap/rss/N01_corrected_nitrate_csv.rss | University of Maine School of Marine Sciences | N01_corrected_nitrate_csv |