Acceptance and utilization of LTER data requires that:
(1) The Principal Investigator be sent a notice stating reasons for acquiring any data and a description of the publication intentions.
(2) The Principal Investigator of the data set be sent a copy of the report or manuscript prior to submission and be adequately cited in any resultant publications.
(3) A copy of any resultant publications should be sent to:
Principal Investigator
Ecosystems Center
Marine Biological Laboratory
7 MBL St.
Woods Hole, MA 02543
| Dataset URLs: | METADATA: HTML, Rich Text, XML(EML compliant) DATA: Comma Delimited, Excel file with Metadata and data |
| Dataset ID: | WAT-VA-Inputs.03 |
| Dataset Title: | Dissolved nutrient and particulate concentrations of freshwater inputs to the Plum Island estuarine system, taken approximately monthly. |
| Investigator 1: | |
| First Name: | Chuck |
| Last Name: | Hopkinson |
| Address line 1: | Marine Biological Laboratory |
| Address line 2: | The Ecosystems Center |
| Address line 3: | 7 MBL Street |
| City: | Woods Hole |
| State: | MA |
| Zip Code: | 02543 |
| Country: | USA |
| Associate Investigators: | Hap Garritt, Aaron Strong, Christina Maki, William Lee, Emily Gaines,Corey Lawrence, John Logan, Josh Goldstein, Greg Peterson, Nat Weston, Ishi Buffam |
| Keywords: | Ipswich River, Parker River, Egypt River, dam, loading, nutrient, Plum Island Estuary, PIE LTER |
| Abstract: | Water chemistry including nutrient concentrations for various forms of N, P, C, as well as suspended sediments, was determined from monthly grab samples taken at watershed inputs to the Plum Island Sound Estuary. Sampling sites were the Ipswich River (Sylvania Dam, Ipswich, MA), Parker River Dam (Central St, Newbury, MA), Egypt River (Ipswich, MA) Mill River (Newbury, MA), Muddy Run (Rowley, MA). These nutrient concentrations are then used in conjunction with USGS discharge data (recorded at gages in the Parker River at Byfield, MA and the Ipswich River at Ipswich, MA) to calculate annual nutrient loading to the Estuary, coming over each dam. Annual yield is also calculated for both dams. Refer to file WAT-VA-Load for loading data. |
| Contact: | Plum Island Ecosystems LTER Information Manager The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole, MA 02543 Phone (508) 289 7485 Email: pie_im@mbl.edu Online URL: http://ecosystems.mbl.edu/PIE/ |
| DATA FILE INFORMATION: | |
| Data File URL | http://ecosystems.mbl.edu/PIE/data/WAT/data/WAT-VA-Inputs.dat |
| Data File Name | WAT-VA-Inputs |
| Beginning Date | 9/5/1993 |
| End Date | 8/8/2007 |
| Number of Data Records | 401 |
| Other Files to Reference | WAT-VA-Load |
| Availability Status | Type 1 |
| Quality Control Information | |
| Maintenance Description | Nutrient samples continue to be taken monthly. Monthly nutrient concentrations are updated annually in WAT-VA-Inputs. Every 2-3 years, WAT-VA-Load is updated with loading calculated from concentrations in WAT-VA-Inputs. |
| Log of Changes: | 01) 27-Sep-2006 EML metadata created level ~3.5 includes attribute information |
| 02) 13-Aug-2007 updated EML metadata to level 4-5 | |
| 03) 21-Sep-2007 updated data set to Aug 2007 data. | |
| RESEARCH LOCATION: | Site 1 |
| Geographic Description | Ipswich Dam, Sylvania Dam, Ipswich, MA |
| Location Bounding Box | |
| West Bounding Coordinate | -71.22 |
| East Bounding Coordinate | -70.75 |
| North Bounding Coordinate | 42.83 |
| South Bounding Coordinate | 42.5 |
| OR if single point location | |
| Latitude | 42.6777 |
| Longitude | -70.8378 |
| Methods: | Sample Collection: Grab samples are collected monthly at the Parker and Ipswich dams, and Egypt Rive. Samples at Mill River and Muddy Run were taken in 1999. Water is filtered and/or partitioned for analysis for suspended solids, particulate organic nitrogen (PON), total dissolved nitrogen (TDN), ammonium (NH4), nitrate (NO3), dissolved inorganic nitrogen (DIN), dissolved organic nitrogen (DON), particulate phosphorus (PPO4), total dissolved phosphorus (TDP), phosphate (PO4), particulate organic carbon (POC), dissolved organic carbon (DOC). Occasionally chlorophyll and phaeopigments in addition to stable isotopes of dissolved and particulate forms of nitrogen and carbon are analyzed. Analyses are conducted according to PIE-LTER protocols (http://ecosystems.mbl.edu/pie/data/method.htm). |
| Variable Name | Variable Description | Units | Measurement Scale | Code Infomation | Number Type | DateTime Format | Missing Value Code | Missing Value Code Explanation |
| STATION | Water sampling station | nominal | blank | no data | ||||
| DATE | Date of water collection day | datetime | dd-mmm-yyyy | blank | no data | |||
| TIME | Time of water collection, 24 hour | datetime | hh:mm | blank | no data | |||
| STATE X | x coordinates (meters) in MA state plane NAD 83 | meter | ratio | real | blank | no data | ||
| STATE Y | y coordinates (meters) in MA state plane NAD 83 | meter | ratio | real | blank | no data | ||
| LAT | Latitude in NAD 83 geographic coordinates (decimal degrees) | degree | interval | real | blank | no data | ||
| LON | Longitude in NAD 83 geographic coordinates (decimal degrees) | degree | interval | real | blank | no data | ||
| TEMP | temperature (Celsius) | celsius | ratio | real | blank | no data | ||
| SAL | salinity | partsPerThousand | ratio | real | blank | no data | ||
| NH4 | Ammonium concentration as NH4-N | microMolesPerLiter | ratio | real | blank | no data | ||
| NO3 | Nitrate concentration as NO3-N | microMolesPerLiter | ratio | real | blank | no data | ||
| PO4 | Phosphate concentration as PO4-P | microMolesPerLiter | ratio | real | blank | no data | ||
| TDN | Total nitrogen concentration as N | microMolesPerLiter | ratio | real | blank | no data | ||
| DON | Dissolved organic nitrogen concentration as N | microMolesPerLiter | ratio | real | blank | no data | ||
| TDP | Total dissolved phosphorus concentration as P | microMolesPerLiter | ratio | real | blank | no data | ||
| DOP | Dissolved organic phosphorus concentration as N | microMolesPerLiter | ratio | real | blank | no data | ||
| DOC | Dissolve organic carbon concentration as C | microMolesPerLiter | ratio | real | blank | no data | ||
| SS | Suspended sediment concentration | milligramsPerLiter | ratio | real | blank | no data | ||
| PP | Particulate phosphorus concentration as P | microMolesPerLiter | ratio | real | blank | no data | ||
| PON | Particulate organic phosphorus concentration as N | microMolesPerLiter | ratio | real | blank | no data | ||
| POC | Particulate organic carbon concentration as C | microMolesPerLiter | ratio | real | blank | no data | ||
| PO13C | d13C (per mil) vs PDB of the particulate organic carbon | partsPerThousand | ratio | real | blank | no data | ||
| PO15N | d15N (per mil) vs air of the particulate organic nitrogen | partsPerThousand | ratio | real | blank | no data | ||
| CHLA | Chlorophyll a concentration | microgramsPerLiter | ratio | real | blank | no data | ||
| PHAEO | Phaeopigment concentration | microgramsPerLiter | ratio | real | blank | no data | ||
| 15NH4 | d15N (per mil) vs air of the dissolved ammonium | partsPerThousand | ratio | real | blank | no data | ||
| 15NO3 | d15N (per mil) vs air of the dissolved nitrate | partsPerThousand | ratio | real | blank | no data | ||
| 15TDN | d15N (per mil) vs air of the total dissolved nitrogen | partsPerThousand | ratio | real | blank | no data | ||
| 15DON | d15N (per mil) vs air of the of the dissolved organic | partsPerThousand | ratio | real | blank | no data | ||
| COMMENTS | Additional information pertaining to the sample | nominal | 1= TDP less than PO4 TDP set equal to PO4 | blank | no data |