Weather at Toolik

Arctic 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

Older Metadata: Attribute table not in XML (EML) file

Dataset URLs:	METADATA: HTML, Rich Text, XML(EML compliant) DATA: Comma Delimited, Excel file with Metadata and data
Dataset ID:	96boht02
Dataset Title:	Bromide concentrations within the hyporheic zone of Oksrukuyik Creek, June 26, 1996, as a result of a continuos addition of the conservative tracer, sodium bromide, to the channel at an upstream site, Arctic LTER 1996.
Investigator 1:
First Name:	William
Last Name:	Bowden
Address line 1:
Address line 2:
Address line 3:
City:
State:
Zip Code:
Country:
Associate Investigators:	Kenneth Edwardson
Keywords:	Oksrukuyik Creek, hyporheic, bromide, tracer, phosphate, nitrate, ammonium, dissolved oxygen, specific, conductivity, methane, and carbon dioxide.
Abstract:	Bromide concentrations within the hyporheic zone of Oksrukuyik Creek, June 26, 1996, as a result of a continuos addition of the conservative tracer, sodium bromide, to the channel at an upstream site. Additionally, the concentration of one or more of the following, associated with a given hyporheic well but not necessarily on the exact same date, exists within the file; phosphate, nitrate, dissolved oxygen, specific conductivity, methane, and carbon dioxide.
Contact:	Arctic LTER Information Manager The Ecosystems Center Marine Biological Lab 7 MBL St Woods Hole, MA 02543 Phone (508) 289 7496 Email: arc_im@mbl.edu Online URL: http://ecosystems.mbl.edu/ARC/
DATA FILE INFORMATION:
Data File Name	96boht02
Beginning Date	5/1/1996
End Date	9/1/1996
Number of Data Records
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes:	Log of changes: For Archival Use: DATA RECEIVED: June 1997 DATA FILE ENTERED BY: Karie Slavik DATA FILE VALIDATION: NAME: DATA:



RESEARCH LOCATION:
Geographic Description	Oksrukuyik Creek Fertilized Zone
Location Bounding Box
West Bounding Coordinate
East Bounding Coordinate
North Bounding Coordinate
South Bounding Coordinate
OR if single point location
Latitude
Longitude



TAXONOMIC COVERAGE:
Organisms studied

Methods:	Hyporheic samplers were installed to a pool-riffle-pool sequence 550 meters downstream of the fertilization point. Well Construction/Installation: Hyporheic samplers consisted of a 1/8 inch O.D. stainless steel (S.S.) tube housed in a 3/4 inch CPVC pipe. At the lower end of the CPVC a rubber stopper was inserted with the S.S tube protruding ten centimeters. A coupler was then used to attach a length of well screen to protect the S.S. tube. Tygon tubing was slid onto the top end of the S.S tubing and a three-way Pharmaseal stopcock was inserted into the tubing. Samplers were inserted into the stream bed by forcing a pry bar into the stream bed to a depth of the maximum depth allowed, typically 30-60 centimeters. The sampler was then worked down into the hole and the pry bar removed, allowing the hole to cave in onto the sampler. The length of the sampler, still above the substrate, was measured and subtracted from the total length to find the depth of the sampler in the substrate. Samplers were allowed to settle before any testing occurred. Sample collection: Samples were collected via a 60 mL syringe directly from the sampler after drawing 30 mL out to purge the interior of the sampler. Samples were filtered through a 25 mm diameter 0.45 um cellulose acetate syringe filter in the field. Sample analysis: Specific conductivity was measured in the field on a VWR model 2052 conductivity meter. All sample analysis was done within 24 hours of collection and stored cold during the interim period. Ammonia-nitrogen concentrations were determined by the phenate method. Nitrate-nitrogen was determined by cadmium reduction. Phosphate-phosphorous was determined by the ascorbic acid method. Samples were analyzed for their bromide concentration by HPLC on a Dionex AS4A Anion column. Carbon dioxide and methane were measured directly by equilibration of the sample with ambient air. The head-space air was then analyzed by thermal conductivity for CO2 and flame ionization for CH4. Concentrations were corrected for ambient concentrations, depth, temperature, and pH. Notes: The variable, D/D for River distance is in reference to the top of the riffle and the established river markings. Use the X and Y coordinates (river right to left and distance downstream) for more detailed positions. (11) VARIABLE DESCRIPTIONS: Precision Coded? Missing Variable Variable Description Units (Y/N) Values Site River y n D/D River Distance meters n n Series Sampler set ID y y Number Sampler ID number/letter y y X X-coordinate meters n y Y Y-coordinate meters n y ET Elapsed Time minutes n y Date Date dd-mmm-yy n n Br Bromide concentration mg/L n y Depth Depth of Sampler cm n y SPC Conductivity mmhos n y PO4 Phosphate umoles/L n y NO3 Nitrate umoles/L n y Comments Reference Citations: American Public Health Association. 1989. Standard methods for the examination of water and wastewater. 17th ed. American Public Health Association, American Water Works Association, and Water Pollution Control Federation, Washington, DC. Kling,G.W., Kipphut, G.W., and Miller, M.C. 1992. The Flux of CO2 and CH4 from lakes and rivers in arctic Alaska. Hydrobiologia, 240:23-36. Sampling Description. None

Data Table

Site		River							y	n
D/D 		River Distance				meters	n	n
Series	Sampler set ID						y	y
Number	Sampler ID number/letter				y	y
X		X-coordinate				meters	n	y
Y		Y-coordinate				meters	n	y
ET 		Elapsed Time				minutes	n	y
Date		Date						dd-mmm-yy	n	n
Br		Bromide concentration		mg/L		n	y
Depth	Depth of Sampler			cm		n	y
SPC		Conductivity				mmhos	n	y
PO4 		Phosphate 				umoles/L	n	y
NO3		Nitrate 					umoles/L	n	y
Comments