CBP Water Quality Monitoring Subset (1984-2018), CB1 1


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.

Data and Resources

Metadata Date

Metadata Tags

GCMD Keywords

CF Standard Names

Online Access

OPeNDAP (DAP Client Access)

These data are available for access with an OPeNDAP client

ERDDAP (DAP Client Access)

These data are available for access with an ERDDAP client

Distribution Formats
  • OPeNDAP (Version: DAP/2.0 )
Distributor Penn State
Point of Contact Maria Herrmann
Penn State
mxh367@psu.edu
Background Information (Background information from the source)
Originator Maria Herrmann
Penn State
mxh367@psu.edu
Background Information (Background information from the source)
contributor Marjy Friedrichs
marjy@vims.edu
Dataset Point of Contact TBD
MARACOOS
401-789-6224
devops@rpsgroup.com
General Documentation
Associated Documentation NSF OCE‐1537013 OCE‐1536996; NOAA OAP: NA18OAR0170430; PI: Marjorie Friedrichs (marjy@vims.edu)
Date(s) creation: 2021-08-26
issued: 2021-08-26
creation: 2021-08-26
issued: 2021-08-26
creation: 2021-08-26
issued: 2021-08-26
creation: 2021-08-26
issued: 2021-08-26
Use Limitations 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.
Time Period 1984-07-12T16:20:00Z to 2018-12-13T11:06:00Z
Spatial Bounding Box Coordinates N: 39.54794° S: 39.54794° E: -76.08481° W: -76.08481°
Theme keywords GCMD Science Keywords
  • 'Oceans > Ocean Chemistry > Alkalinity''Oceans > Ocean Chemistry > Chlorophyll''Oceans > Salinity/Density > Salinity''Oceans > Ocean Temperature > Water Temperature''Oceans > Ocean Chemistry > Oxygen'

CF Standard Name Table v55
  • 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

Project keywords Uncategorized
  • NSF OCE‐1537013 OCE‐1536996; NOAA OAP: NA18OAR0170430; PI: Marjorie Friedrichs (marjy@vims.edu)

Use Constraints 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.
Lineage Statement [2021-08-26] Created NetCDF4 file from maracoos_set98.mat
Platforms
platform fixed
platform_id cbp_CB1.1
platform_name Chesapeake Bay Buoy - CB1.1
platform_vocabulary https://mmisw.org/ont/ioos/platform
Ingestion Attributes
gts_ingest False
Instrument Attributes
Attribution Information
contributor_email marjy@vims.edu
contributor_name Marjy Friedrichs
contributor_url http://www.vims.edu/people/friedrichs_ma/
creator_address 405a Walker Building
creator_city University Park
creator_country USA
creator_phone 814-865-0478
creator_sector academic
creator_state PA
creator_postalcode 16802
creator_url http://www.met.psu.edu
publisher_address PO BOX 4610
publisher_city Newark
publisher_country USA
publisher_phone (401) 789-6224
publisher_state DE
publisher_postalcode 19715
infoUrl https://www.chesapeakebay.net/what/downloads/cbp_water_quality_database_1984_present
CF related
standard_name_vocabulary CF Standard Name Table v55