CBP_CB5_4W eng UTF8 dataset service TBD MARACOOS 401-789-6224 55 Village Square South Kingstown RI 02879 USA devops@rpsgroup.com pointOfContact 2025-11-12 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) 4 column row vertical temporal CBP Water Quality Monitoring Subset (1984-2018), CB5 4W 2021-08-26 creation 2021-08-26 issued erddap.maracoos.org CBP_CB5_4W Maria Herrmann Penn State mxh367@psu.edu https://www.chesapeakebay.net/what/downloads/cbp_water_quality_database_1984_present information web browser Background Information Background information from the source information originator Marjy Friedrichs marjy@vims.edu contributor This product was developed as part of the project supported by the grant from and the National Oceanic and Atmospheric Administration’s Ocean Acidification Program under award NA18OAR0170430 to the Virginia Institute of Marine Science. The data product consists of water quality data for tidal 98 stations for 1984­­–2018. The source data used to generate this product were downloaded from the Chesapeake Bay Program’s (CBP) data hub. Out of the total of 255 monitoring stations in the Tidal Monitoring Program, we selected 98 with the long monitoring record (30 years or longer). The following variables were downloaded from the data hub at the native temporal and vertical resolution (between one and four cruises per month and approximately 10 depth levels sampled between 0 and 37 m) for 1984–2018: water temperature (T), salinity (S), pH, total alkalinity (TA), dissolved oxygen (DO) , and chlorophyll (Chl). All pH data prior to 1998 were removed because of the data quality concerns (Herrmann et al., 2020). Briefly, we found a dramatic difference in long-term trends between stations measured by institutions in the state of Virginia and stations measured by the state of Maryland, particularly from late spring to early fall. The boundary between the station groups runs east–west within the mesohaline portion of the bay, where the Potomac River estuary intersects the mainstem bay. The boundary separates strong negative linear trends to the south (Virginia stations) from neutral and weakly positive linear trends to the north (Maryland stations). For all variables, data entries marked with CBP’s “Problem” and “Qualifier” flags were removed. Additionally, all variables were scanned for extreme outliers: for each variable, data from all stations, depths, and times were combined into a single composite sample for which the 75th and 25th percentiles (i.e., the upper and lower quantiles) and the interquartile range (the difference between the upper and lower quantiles) were calculated. Extreme outliers were defined as the values falling outside of a certain number (censoring criterion) of interquartile ranges from the upper and lower quantiles. CBP data hub (https://www.chesapeakebay.net/what/data) and NOAA OA Program funding: "RVA-OA2017: Vulnerability of the largest U.S. estuary to acidification: Implications of declining pH for shellfish hatcheries in the Chesapeake Bay Maria Herrmann Penn State mxh367@psu.edu https://www.chesapeakebay.net/what/downloads/cbp_water_quality_database_1984_present information web browser Background Information Background information from the source information pointOfContact 'Oceans > Ocean Chemistry > Alkalinity''Oceans > Ocean Chemistry > Chlorophyll''Oceans > Salinity/Density > Salinity''Oceans > Ocean Temperature > Water Temperature''Oceans > Ocean Chemistry > Oxygen' theme GCMD Science Keywords NSF OCE‐1537013 OCE‐1536996; NOAA OAP: NA18OAR0170430; PI: Marjorie Friedrichs (marjy@vims.edu) project time platform_name latitude longitude depth mass_concentration_of_chlorophyll_in_sea_water sea_water_practical_salinity sea_water_temperature mass_concentration_of_oxygen_in_sea_water sea_water_ph_reported_on_total_scale theme CF Standard Name Table v55 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. NSF OCE‐1537013 OCE‐1536996; NOAA OAP: NA18OAR0170430; PI: Marjorie Friedrichs (marjy@vims.edu) largerWorkCitation project Unidata Common Data Model TimeSeriesProfile largerWorkCitation project eng geoscientificInformation 1 -76.29467 -76.29467 37.81347 37.81347 seconds 2018-02-15T09:38:00Z 2018-12-12T16:15:00Z -6.0 -0.0 CBP Water Quality Monitoring Subset (1984-2018), CB5 4W 2021-08-26 creation 2021-08-26 issued Maria Herrmann Penn State mxh367@psu.edu https://www.chesapeakebay.net/what/downloads/cbp_water_quality_database_1984_present information web browser Background Information Background information from the source information originator Marjy Friedrichs marjy@vims.edu contributor This product was developed as part of the project supported by the grant from and the National Oceanic and Atmospheric Administration’s Ocean Acidification Program under award NA18OAR0170430 to the Virginia Institute of Marine Science. The data product consists of water quality data for tidal 98 stations for 1984­­–2018. The source data used to generate this product were downloaded from the Chesapeake Bay Program’s (CBP) data hub. Out of the total of 255 monitoring stations in the Tidal Monitoring Program, we selected 98 with the long monitoring record (30 years or longer). The following variables were downloaded from the data hub at the native temporal and vertical resolution (between one and four cruises per month and approximately 10 depth levels sampled between 0 and 37 m) for 1984–2018: water temperature (T), salinity (S), pH, total alkalinity (TA), dissolved oxygen (DO) , and chlorophyll (Chl). All pH data prior to 1998 were removed because of the data quality concerns (Herrmann et al., 2020). Briefly, we found a dramatic difference in long-term trends between stations measured by institutions in the state of Virginia and stations measured by the state of Maryland, particularly from late spring to early fall. The boundary between the station groups runs east–west within the mesohaline portion of the bay, where the Potomac River estuary intersects the mainstem bay. The boundary separates strong negative linear trends to the south (Virginia stations) from neutral and weakly positive linear trends to the north (Maryland stations). For all variables, data entries marked with CBP’s “Problem” and “Qualifier” flags were removed. Additionally, all variables were scanned for extreme outliers: for each variable, data from all stations, depths, and times were combined into a single composite sample for which the 75th and 25th percentiles (i.e., the upper and lower quantiles) and the interquartile range (the difference between the upper and lower quantiles) were calculated. Extreme outliers were defined as the values falling outside of a certain number (censoring criterion) of interquartile ranges from the upper and lower quantiles. ERDDAP tabledap 1 -76.29467 -76.29467 37.81347 37.81347 seconds 2018-02-15T09:38:00Z 2018-12-12T16:15:00Z -6.0 -0.0 tight ERDDAPtabledapDatasetQueryAndAccess https://erddap.maracoos.org/erddap/tabledap/CBP_CB5_4W 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 CBP Water Quality Monitoring Subset (1984-2018), CB5 4W 2021-08-26 creation 2021-08-26 issued Maria Herrmann Penn State mxh367@psu.edu https://www.chesapeakebay.net/what/downloads/cbp_water_quality_database_1984_present information web browser Background Information Background information from the source information originator Marjy Friedrichs marjy@vims.edu contributor This product was developed as part of the project supported by the grant from and the National Oceanic and Atmospheric Administration’s Ocean Acidification Program under award NA18OAR0170430 to the Virginia Institute of Marine Science. The data product consists of water quality data for tidal 98 stations for 1984­­–2018. The source data used to generate this product were downloaded from the Chesapeake Bay Program’s (CBP) data hub. Out of the total of 255 monitoring stations in the Tidal Monitoring Program, we selected 98 with the long monitoring record (30 years or longer). The following variables were downloaded from the data hub at the native temporal and vertical resolution (between one and four cruises per month and approximately 10 depth levels sampled between 0 and 37 m) for 1984–2018: water temperature (T), salinity (S), pH, total alkalinity (TA), dissolved oxygen (DO) , and chlorophyll (Chl). All pH data prior to 1998 were removed because of the data quality concerns (Herrmann et al., 2020). Briefly, we found a dramatic difference in long-term trends between stations measured by institutions in the state of Virginia and stations measured by the state of Maryland, particularly from late spring to early fall. The boundary between the station groups runs east–west within the mesohaline portion of the bay, where the Potomac River estuary intersects the mainstem bay. The boundary separates strong negative linear trends to the south (Virginia stations) from neutral and weakly positive linear trends to the north (Maryland stations). For all variables, data entries marked with CBP’s “Problem” and “Qualifier” flags were removed. Additionally, all variables were scanned for extreme outliers: for each variable, data from all stations, depths, and times were combined into a single composite sample for which the 75th and 25th percentiles (i.e., the upper and lower quantiles) and the interquartile range (the difference between the upper and lower quantiles) were calculated. Extreme outliers were defined as the values falling outside of a certain number (censoring criterion) of interquartile ranges from the upper and lower quantiles. OPeNDAP 1 -76.29467 -76.29467 37.81347 37.81347 seconds 2018-02-15T09:38:00Z 2018-12-12T16:15:00Z -6.0 -0.0 tight OPeNDAPDatasetQueryAndAccess https://erddap.maracoos.org/erddap/tabledap/CBP_CB5_4W 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 CBP Water Quality Monitoring Subset (1984-2018), CB5 4W 2021-08-26 creation 2021-08-26 issued Maria Herrmann Penn State mxh367@psu.edu https://www.chesapeakebay.net/what/downloads/cbp_water_quality_database_1984_present information web browser Background Information Background information from the source information originator Marjy Friedrichs marjy@vims.edu contributor This product was developed as part of the project supported by the grant from and the National Oceanic and Atmospheric Administration’s Ocean Acidification Program under award NA18OAR0170430 to the Virginia Institute of Marine Science. The data product consists of water quality data for tidal 98 stations for 1984­­–2018. The source data used to generate this product were downloaded from the Chesapeake Bay Program’s (CBP) data hub. Out of the total of 255 monitoring stations in the Tidal Monitoring Program, we selected 98 with the long monitoring record (30 years or longer). The following variables were downloaded from the data hub at the native temporal and vertical resolution (between one and four cruises per month and approximately 10 depth levels sampled between 0 and 37 m) for 1984–2018: water temperature (T), salinity (S), pH, total alkalinity (TA), dissolved oxygen (DO) , and chlorophyll (Chl). All pH data prior to 1998 were removed because of the data quality concerns (Herrmann et al., 2020). Briefly, we found a dramatic difference in long-term trends between stations measured by institutions in the state of Virginia and stations measured by the state of Maryland, particularly from late spring to early fall. The boundary between the station groups runs east–west within the mesohaline portion of the bay, where the Potomac River estuary intersects the mainstem bay. The boundary separates strong negative linear trends to the south (Virginia stations) from neutral and weakly positive linear trends to the north (Maryland stations). For all variables, data entries marked with CBP’s “Problem” and “Qualifier” flags were removed. Additionally, all variables were scanned for extreme outliers: for each variable, data from all stations, depths, and times were combined into a single composite sample for which the 75th and 25th percentiles (i.e., the upper and lower quantiles) and the interquartile range (the difference between the upper and lower quantiles) were calculated. Extreme outliers were defined as the values falling outside of a certain number (censoring criterion) of interquartile ranges from the upper and lower quantiles. ERDDAP Subset 1 -76.29467 -76.29467 37.81347 37.81347 seconds 2018-02-15T09:38:00Z 2018-12-12T16:15:00Z -6.0 -0.0 tight ERDDAP_Subset https://erddap.maracoos.org/erddap/tabledap/CBP_CB5_4W.subset search Subset Web page to facilitate selecting subsets of the dataset download physicalMeasurement time double time of observation station_id String Platform Name chl double chlorophyll salt double salinity temp double Water Temperature oxy double Dissolved Oxygen pH double sea_water_ph_reported_on_NBS_scale TBD MARACOOS 401-789-6224 55 Village Square South Kingstown RI 02879 USA devops@rpsgroup.com distributor OPeNDAP DAP/2.0 https://erddap.maracoos.org/erddap/tabledap/CBP_CB5_4W.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 https://erddap.maracoos.org/erddap/tabledap/CBP_CB5_4W.graph order Make-A-Graph Form ERDDAP's Make-A-Graph .html web page for this dataset. Create an image with a map or graph of a subset of the data. mapDigital dataset [2021-08-26] Created NetCDF4 file from maracoos_set98.mat This record was created from dataset metadata by ERDDAP Version 2.25_1