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ERDDAP > info > CBP_CB2_1

Title Sum-
Institution Dataset ID
   set  data   graph     CBP Water Quality Monitoring Subset (1984-2018), CB2 1    ?   F   I   M   background (external link) RSS Subscribe Penn State CBP_CB2_1

The Dataset's Variables and Attributes

Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL acknowledgement String CBP data hub ( 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
attribute NC_GLOBAL cdm_data_type String TimeSeriesProfile
attribute NC_GLOBAL cdm_profile_variables String time
attribute NC_GLOBAL cdm_timeseries_variables String station_id
attribute NC_GLOBAL contributor_email String marjy at
attribute NC_GLOBAL contributor_name String Marjy Friedrichs
attribute NC_GLOBAL contributor_role String principalInvestigator
attribute NC_GLOBAL contributor_role_vocabulary String (external link)
attribute NC_GLOBAL contributor_url String (external link)
attribute NC_GLOBAL Conventions String CF-1.7, ACDD-1.3, IOOS-1.2
attribute NC_GLOBAL creator_address String 405a Walker Building
attribute NC_GLOBAL creator_city String University Park
attribute NC_GLOBAL creator_country String USA
attribute NC_GLOBAL creator_email String mxh367 at
attribute NC_GLOBAL creator_institution String Penn State
attribute NC_GLOBAL creator_name String Maria Herrmann
attribute NC_GLOBAL creator_phone String 814-865-0478
attribute NC_GLOBAL creator_postalcode String 16802
attribute NC_GLOBAL creator_sector String academic
attribute NC_GLOBAL creator_state String PA
attribute NC_GLOBAL creator_type String person
attribute NC_GLOBAL creator_url String (external link)
attribute NC_GLOBAL date_created String 2021-08-26T18:47:09Z
attribute NC_GLOBAL date_issued String 2021-08-26T18:47:09Z
attribute NC_GLOBAL date_metadata_modified String 2021-08-26T18:47:09Z
attribute NC_GLOBAL date_modified String 2021-08-26T18:47:09Z
attribute NC_GLOBAL Easternmost_Easting double -76.02599
attribute NC_GLOBAL featureType String TimeSeriesProfile
attribute NC_GLOBAL geospatial_bounds String POINT(39.44149 -76.02599)
attribute NC_GLOBAL geospatial_bounds_crs String EPSG:4326
attribute NC_GLOBAL geospatial_bounds_vertical_crs String EPSG:4297
attribute NC_GLOBAL geospatial_lat_max double 39.44149
attribute NC_GLOBAL geospatial_lat_min double 39.44149
attribute NC_GLOBAL geospatial_lat_units String degrees_north
attribute NC_GLOBAL geospatial_lon_max double -76.02599
attribute NC_GLOBAL geospatial_lon_min double -76.02599
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL geospatial_vertical_max double 7.0
attribute NC_GLOBAL geospatial_vertical_min double 0.3
attribute NC_GLOBAL geospatial_vertical_positive String down
attribute NC_GLOBAL geospatial_vertical_units String m
attribute NC_GLOBAL gts_ingest String False
attribute NC_GLOBAL history String [2021-08-26] Created NetCDF4 file from maracoos_set98.mat
attribute NC_GLOBAL id String CB2.1
attribute NC_GLOBAL infoUrl String (external link)
attribute NC_GLOBAL institution String Penn State
attribute NC_GLOBAL keywords String 'Oceans > Ocean Chemistry > Alkalinity''Oceans > Ocean Chemistry > Chlorophyll''Oceans > Salinity/Density > Salinity''Oceans > Ocean Temperature > Water Temperature''Oceans > Ocean Chemistry > Oxygen'
attribute NC_GLOBAL keywords_vocabulary String GCMD Science Keywords
attribute NC_GLOBAL license String 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.
attribute NC_GLOBAL naming_authority String edu.psu.met
attribute NC_GLOBAL nodc_template_version String NODC_TimeSeriesProfile_Template_v2.0
attribute NC_GLOBAL Northernmost_Northing double 39.44149
attribute NC_GLOBAL platform String fixed
attribute NC_GLOBAL platform_id String cbp_CB2.1
attribute NC_GLOBAL platform_name String Chesapeake Bay Buoy - CB2.1
attribute NC_GLOBAL platform_vocabulary String (external link)
attribute NC_GLOBAL processing_level String For temperature, salinity, pH, alkalinity, oxygen, and chlorophyll: QA/QC of the open-source Chesapeake Bay Program water quality monitoring data (; model output for all other variables
attribute NC_GLOBAL project String NSF OCE‐1537013 OCE‐1536996; NOAA OAP: NA18OAR0170430; PI: Marjorie Friedrichs (
attribute NC_GLOBAL publisher_address String PO BOX 4610
attribute NC_GLOBAL publisher_city String Newark
attribute NC_GLOBAL publisher_country String USA
attribute NC_GLOBAL publisher_email String devops at
attribute NC_GLOBAL publisher_institution String MARACOOS
attribute NC_GLOBAL publisher_name String MARACOOS
attribute NC_GLOBAL publisher_phone String (401) 789-6224
attribute NC_GLOBAL publisher_postalcode String 19715
attribute NC_GLOBAL publisher_state String DE
attribute NC_GLOBAL publisher_type String institution
attribute NC_GLOBAL publisher_url String (external link)
attribute NC_GLOBAL references String (external link)
attribute NC_GLOBAL source String Data from maracoos_set98.mat file created by PSU/VIMS
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL Southernmost_Northing double 39.44149
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL subsetVariables String station_id, depth
attribute NC_GLOBAL summary String 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.
attribute NC_GLOBAL time_coverage_duration String PT78060S
attribute NC_GLOBAL time_coverage_end String 2018-12-13T10:29:00Z
attribute NC_GLOBAL time_coverage_resolution String PT4800S
attribute NC_GLOBAL time_coverage_start String 1984-07-12T15:30:00Z
attribute NC_GLOBAL title String CBP Water Quality Monitoring Subset (1984-2018), CB2 1
attribute NC_GLOBAL Westernmost_Easting double -76.02599
variable time   double  
attribute time _CoordinateAxisType String Time
attribute time actual_range double 4.58494200000003E8, 1.544696940000004E9
attribute time axis String T
attribute time cf_role String profile_id
attribute time ioos_category String Time
attribute time long_name String time of observation
attribute time standard_name String time
attribute time time_origin String 01-JAN-1970 00:00:00
attribute time units String seconds since 1970-01-01T00:00:00Z
variable station_id   String  
attribute station_id cf_role String timeseries_id
attribute station_id ioos_category String Identifier
attribute station_id long_name String Platform Name
attribute station_id short_name String edu_vims_CB2.1
attribute station_id standard_name String platform_name
attribute station_id type String fixed
variable latitude   double  
attribute latitude _CoordinateAxisType String Lat
attribute latitude actual_range double 39.44149, 39.44149
attribute latitude axis String Y
attribute latitude colorBarMaximum double 90.0
attribute latitude colorBarMinimum double -90.0
attribute latitude ioos_category String Location
attribute latitude long_name String station latitude
attribute latitude standard_name String latitude
attribute latitude units String degrees_north
variable longitude   double  
attribute longitude _CoordinateAxisType String Lon
attribute longitude actual_range double -76.02599, -76.02599
attribute longitude axis String X
attribute longitude colorBarMaximum double 180.0
attribute longitude colorBarMinimum double -180.0
attribute longitude ioos_category String Location
attribute longitude long_name String station longitude
attribute longitude standard_name String longitude
attribute longitude units String degrees_east
variable depth   double  
attribute depth _CoordinateAxisType String Height
attribute depth _CoordinateZisPositive String down
attribute depth actual_range double 0.3, 7.0
attribute depth axis String Z
attribute depth colorBarMaximum double 8000.0
attribute depth colorBarMinimum double -8000.0
attribute depth colorBarPalette String TopographyDepth
attribute depth ioos_category String Location
attribute depth long_name String Depth
attribute depth positive String down
attribute depth standard_name String depth
attribute depth units String m
variable chl   double  
attribute chl _FillValue double -9999.0
attribute chl actual_range double 0.299, 77.2
attribute chl colorBarMaximum double 30.0
attribute chl colorBarMinimum double 0.03
attribute chl colorBarScale String Log
attribute chl coverage_content_type String physicalMeasurement
attribute chl ioos_category String Ocean Color
attribute chl long_name String chlorophyll
attribute chl missing_value double -9999.0
attribute chl platform String station_id
attribute chl standard_name String mass_concentration_of_chlorophyll_in_sea_water
attribute chl units String ug/L
variable salt   double  
attribute salt _FillValue double -9999.0
attribute salt actual_range double 0.0, 8.5
attribute salt colorBarMaximum double 37.0
attribute salt colorBarMinimum double 32.0
attribute salt coordinates String time lat lon depth
attribute salt coverage_content_type String physicalMeasurement
attribute salt ioos_category String Salinity
attribute salt long_name String salinity
attribute salt missing_value double -9999.0
attribute salt platform String station_id
attribute salt standard_name String sea_water_practical_salinity
attribute salt units String PSU
variable temp   double  
attribute temp _FillValue double -9999.0
attribute temp actual_range double 0.1, 30.6
attribute temp colorBarMaximum double 32.0
attribute temp colorBarMinimum double 0.0
attribute temp coordinates String time lat lon depth
attribute temp coverage_content_type String physicalMeasurement
attribute temp ioos_category String Temperature
attribute temp long_name String Water Temperature
attribute temp missing_value double -9999.0
attribute temp platform String station_id
attribute temp standard_name String sea_water_temperature
attribute temp units String degree_C
variable oxy   double  
attribute oxy _FillValue double -9999.0
attribute oxy actual_range double 2.4, 14.7
attribute oxy colorBarMaximum double 500.0
attribute oxy colorBarMinimum double 0.0
attribute oxy coordinates String time lat lon depth
attribute oxy coverage_content_type String physicalMeasurement
attribute oxy ioos_category String Dissolved O2
attribute oxy long_name String Dissolved Oxygen
attribute oxy missing_value double -9999.0
attribute oxy platform String station_id
attribute oxy standard_name String mass_concentration_of_oxygen_in_sea_water
attribute oxy units String mg/L
variable pH   double  
attribute pH _FillValue double -9999.0
attribute pH actual_range double 6.8, 9.3
attribute pH colorBarMaximum double 9.0
attribute pH colorBarMinimum double 7.0
attribute pH coordinates String time lat lon depth
attribute pH coverage_content_type String physicalMeasurement
attribute pH ioos_category String Salinity
attribute pH long_name String sea_water_ph_reported_on_NBS_scale
attribute pH missing_value double -9999.0
attribute pH platform String station_id
attribute pH standard_name String sea_water_ph_reported_on_total_scale

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.

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