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:	91bohypo
Dataset Title:	Hyporheic nutrients and chemistry for samples were collected from control pool and riffle sites in both the Kuparuk River and Oksrukuyik Creek, Arctic LTER 1991.
Investigator 1:
First Name:	William
Last Name:	Bowden
Address line 1:
Address line 2:
Address line 3:
City:
State:
Zip Code:
Country:
Associate Investigators:	Jacques Finlay
Keywords:	hyporheic, nutrients, Kuparuk River, Oksrukuyik Creek, control, chemistry, pool, riffle
Abstract:	Hyporheic nutrients and chemistry for samples were collected from control pool and riffle sites in both the Kuparuk River and Oksrukuyik Creek.
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	91bohypo
Beginning Date	5/1/1991
End Date	9/1/1991
Number of Data Records
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes:	Log of changes: For Archival Use: DATE RECEIVED: June 97 DATA FILE ENTERED BY: Karie Slavik DATA FILE VALIDATION: NAME: Karie Slavik DATE: 03Sept97



RESEARCH LOCATION:
Geographic Description	Kuparuk River Control: Riffles, runs, and pools from approximately 0.0 to -1.0 km NOTE: The actual sites for these installations were poorly documented. KH1 is apparently above "Lysimeter Corner"(perhaps -0.8 to -1 k); KH2 is at "Lysimeter Corner" (perhaps -0.7 to -0.8k); KH3 is probably at about -0.2 to -0.3 k; KH1 is probably at about -0.1 to -0.2k. Oksrukuyik Creek Control: Riffle, runs, and pools from approximately -1.1 to -1.4 km
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:	To sample the hyporheic zones of the Kuparuk River and Oksrukuyik Creek we used a combination of stainless steel (SS) and PVC wells. A description of the SS wells and their sampling protocol is contained in the LTER file "90BOHYPO.DOC". The PVC wells were constructed from 6 ft. lengths of 1/2 in. O.D. PVC tubing. A polypropylene wellpoint was fixed to the bottom end of each well. Above this wellpoint 4 in. of the PVC tube was slotted every 1/4 in. Slot width was 0.006 in. PVC wells were inserted by using a pry bar to create a narrow gap in the streambed cobbles. As the pry bar was removed, the PVC well was quickly inserted in much the same manner as the SS wells were installed. Wells were installed to the deepest depth possible. PVC wells were sampled with a length of 1/8 in. I.D X 1/16 in. wall Tygon tubing lowered into the well. All water was removed by drawing up slowly with a 60 cc B.D. syringe. This water was discarded and the well was allowed to refill; refill time was variable, ranging from minutes to hours. After refilling, wells were sampled a second time. Well water was withdrawn into a syringe and a 0.45 um pore size, 25 mm diameter syringe filter attached to the syringe tip. The filter was rinsed with 10 ml of sample and the remaining sample filtered into an acid-washed 125 ml polypropylene bottle. Samples were refrigerated at Toolik Camp until nutrient analysis could be completed on the autoanalyzer. We noted that adult insects (dead) collected in the wells and so all PVC wells were removed, cleaned, and reinstalled. Nutrient concentrations from PVC wells on the first two sampling dates of both rivers are suspect because of contamination of the insects. Notes: These data should not be released to any party without the written permission of William B. Bowden. See note on first sampling date in both rivers, above. (11) VARIABLE DESCRIPTIONS: Precis. Coded? Missing Variable Variable description Units (Y/N) Values SITE site of measurement y D/D distance from K or O dripper 0.05 km n . DATE date ddmmyy n LOCATION location (CONTROL, +P) n SUBSITE typically POOL, RIFFLE, or RUN n WELLID Identification of well n WELLTYPE SS or PVC n WELLZ Depth of well in streambed cm n NO3 Concentration of NO3 umoles/liter n . NH4 Concentration of NH4 umoles/liter n . PO4 Concentration of PO4 umoles/liter n . Calculations: Concentrations determined from linear regressions of absorbance versus known standards. Sampling Description. None

Data Table

SITE        site of measurement                           y
DATE        Date                           DD-MMM-YY      n
STATION        station relative to the dripper site                         n
EXP         experiment  Cont=control, Fert = fertilized   y
PO4         phospate (SRP)                 uM/L           n
NO3         nitrate/nitrite                uM/L           n
NH4         ammonia                        uM/L           n