Plum Island Ecosystems LTER Database

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-Rainfall.01
Dataset Title:Solute data of wet deposition for the Ipswich River basin from May 2000 to June 2001
Investigator 1: 
First Name:Charles
Last Name:Hopkinson
Address line 1:Ecosystems Center
Address line 2:MBL
Address line 3:7 MBL St
City:Woods Hole
State:MA
Zip Code:02543
Country:USA
Associate Investigators:Ed Rastetter, Joe Vallino, Michael Williams, Solange Filoso, Jeff Evans
Keywords:PIE LTER, inorganic nutrients, Ipswich, Massachusetts, ammonium, base cations, chloride, dissolved, hydrogen ion, nitrate, nitrogen, nutrient, organic, phosphate, pH, phosphorus, sulfate, total
Abstract:Solute data of wet deposition for the Ipswich River basin. Samples were collected on an event basis when possible, and otherwise collected on a weekly basis. Samplings are from May 2000 to June 2001, and were collected and analyzed by MBL.
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-rainfall.dat
Data File Name WAT-VA-rainfall
Beginning Date 5/18/2000
End Date 6/22/2001
Number of Data Records 43
Other Files to Reference
Availability Status Type 1
Quality Control Information
Maintenance Description
Log of Changes: Ver 01, Excel EML upgrade
 
RESEARCH LOCATION: Site 1 Site 2 Site 3
Geographic Description Ipswich River Wildlife Sanctuary GDA weather station  
Location Bounding Box      
West Bounding Coordinate      
East Bounding Coordinate      
North Bounding Coordinate      
South Bounding Coordinate      
OR if single point location      
Latitude 42.631645 42.75148419  
Longitude -70.920144 -70.9024065  
Elevation      
       
       
 
TAXONOMIC COVERAGE:
Taxonomic Protocols
Organisms studied
 
Methods:Event and cumulative atmospheric wet deposition on a weekly to biweekly basis from an open field at a wildlife refuge for one year (May 2000 through April 2001). Deposition was collected with an Aerochem Metrics precipitation collector. A total of 42 wet events and cumulative deposition (i.e., multiple storms combined) samples were collected and analyzed for N fractions as described below. Wet deposition in this study was filtered immediately upon collection using 47 mm Nuclepore polycarbonate filters (0.4 mm) held in plastic filter holders, and filtered with 120 cc syringes under manual pressure. No deposition samples were frozen prior to analysis.

Ammonium, NO3 (NO2 + NO3), total dissolved N (TDN), and particulate N (PN) were determined using standard colorometric methods. Ammonium was determined using an indophenol method. Nitrate was usually analyzed colorimetrically following cadmium reduction on a Lachat autoanalyzer. Concentrations of NO2 were determined to be negligible (<0.2 mM) and, therefore samples were also run on a Dionex ion chromatograph (model 2010i) from May 2000 through June 2001 to determine NO3, SO4, and Cl.
Nitrate concentrationsdetermined by the two methods were not significantly different (t test, p < 0.01). Persulfate oxidation
followed by NO3 analysis was done to quantify total dissolvednitrogen (TDN) using the method of Valderrama [1981]. Dissolved organic nitrogen (DON) was calculated as the difference between TDN and DIN (NH4+NO2+NO3).

Data Table

Variable Name Variable Description Units Measurement Scale Code Information Number Type DateTime Format Missing Value Code Missing Value Code Explanation
Start date Start date of collection   datetime     dd-mmm-yyyy   blank cell
End date End date of collection   datetime     dd-mmm-yyyy   blank cell
Sample site Location where samples were taken   nominal         blank cell
Volume Volume collected liter ratio   real     blank cell
Depth Depth in Aerochem collector millimeter ratio   real     blank cell
Duration Indicates sampling for an "event" vs "cumulative"   nominal         blank cell
pH negative logarithm of the hydrogen ion concentration of an aqueous solution dimensionless ratio   real     blank cell
H Hydrogen ion concentration as H microMolesPerLiter ratio   real     blank cell
NO3 nitrate + nitrite concentration as N microMolesPerLiter ratio   real     blank cell
NH4 ammonium concentration as N microMolesPerLiter ratio   real     blank cell
DIN dissolved inorganic nitrogen concentration as N microMolesPerLiter ratio   real     blank cell
TDN total dissolved nitrogen concentration as N microMolesPerLiter ratio   real     blank cell
DON dissolved organic nitrogen concentration as N microMolesPerLiter ratio   real     blank cell
PO4 soluble reactive phosphorus concentration as P microMolesPerLiter ratio   real     blank cell
TDP total dissolved phosphorus concentration as P microMolesPerLiter ratio   real     blank cell
Cl chloride concentration as Cl microMolesPerLiter ratio   real     blank cell
SO4 sulfate concentration as S microMolesPerLiter ratio   real     blank cell
Ca calcium concentration as Ca microMolesPerLiter ratio   real     blank cell
Mg magnesium concentration as Mg microMolesPerLiter ratio   real     blank cell
K potassium concentration as K microMolesPerLiter ratio   real     blank cell
Na sodium concentration as Na microMolesPerLiter ratio   real     blank cell
COMMENTS additional information pertaining to individual samples   nominal         blank cell