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Conditions of Use

The re-use of scientific data has the potential to greatly increase communication, collaboration and synthesis within and among disciplines, and thus is fostered, supported and encouraged. Permission to use this dataset is granted to the Data User free of charge subject to the following terms:

1) Acceptable use. Use of the dataset will be restricted to academic, research, educational, government, recreational, or other not-for-profit professional purposes. The Data User is permitted to produce and distribute derived works from this dataset provided that they are released under the same license terms as those accompanying this Data Set. Any other uses for the Data Set or its derived products will require explicit permission from the dataset owner.
2 ) Redistribution. The data are provided for use by the Data User. The metadata and this license must accompany all copies made and be available to all users of this Data Set. The Data User will not redistribute the original Data Set beyond this collaboration sphere.
3 ) Citation. It is considered a matter of professional ethics to acknowledge the work of other scientists. Thus, the Data User will properly cite the Data Set in any publications or in the metadata of any derived data products that were produced using the Data Set. Citation should take the following general form: Creator, Year of Data Publication, Title of Dataset, Publisher, Dataset identifier. For example:

Shaver, G. 1989. Above ground biomass in acidic tussock tundra experimental site, 1989, Arctic LTER, Toolik, Alaska. Arctic LTER, Marine Biological Lab, Woods Hole, Ma 02543. 1989gsttbm http://ecosystems.mbl.edu/arc/terrest/biomass/index.shtml 

4 ) Acknowledgement. The Data User should acknowledge any institutional support or specific funding awards referenced in the metadata accompanying this dataset in any publications where the Data Set contributed significantly to its content. Acknowledgements should identify the supporting party, the party that received the support, and any identifying information such as grant numbers. For example:

Data sets were provided by the Arctic LTER. This material is based upon work supported by the National Science Foundation under Grants #DEB-981022, 9211775, 8702328; #OPP-9911278, 9911681, 9732281, 9615411, 9615563, 9615942, 9615949, 9400722, 9415411, 9318529; #BSR 9019055, 8806635, 8507493.

5 ) Notification. The Data User will notify the Data Set Contact when any derivative work or publication based on or derived from the Data Set is distributed. The Data User will provide the data contact with two reprints of any publications resulting from use of the Data Set and will provide copies, or on-line access to, any derived digital products. Notification will include an explanation of how the Data Set was used to produce the derived work.
6 ) Collaboration. The Data Set has been released in the spirit of open scientific collaboration. Data Users are thus strongly encouraged to consider consultation, collaboration and/or co-authorship with the Data Set Creator.

By accepting this Data Set, the Data User agrees to abide by the terms of this agreement. The Data Owner shall have the right to terminate this agreement immediately by written notice upon the Data User's breach of, or non-compliance with, any of its terms. The Data User may be held responsible for any misuse that is caused or encouraged by the Data User's failure to abide by the terms of this agreement.

Disclaimer

While substantial efforts are made to ensure the accuracy of data and documentation contained in this Data Set, complete accuracy of data and metadata cannot be guaranteed. All data and metadata are made available "as is". The Data User holds all parties involved in the production or distribution of the Data Set harmless for damages resulting from its use or interpretation.

Dataset URLs:METADATA: HTML, Rich Text, XML(EML compliant)
DATA: Comma Delimited, Excel file with Metadata and data, Dataset via LTER Data Poral
Dataset ID:2002_ArcticLTER_Lakes_nuts.04
Dataset Title:Nutrient and chemical data for various lakes near Toolik Research Station, Arctic LTER, Summer 2002.
Investigator 1: 
First Name:Anne
Last Name:Giblin
Organization:Marine Biological Laboratory
Address line 2:Ecosystems Center
Address line 3:7 MBL Street
City:Woods Hole
State:MA
Zip Code:02543
Country:United States of America
Investigator 2: 
First Name:Christopher
Last Name:Luecke
Organization:Utah State University
Address line 2:Department of Watershed Science
Address line 3:
City:Logan
State:UT
Zip Code:84322-5210
Country:United States of America
Investigator 3: 
First Name:George
Last Name:Kling
Organization:University of Michigan
Address line 2:Department of Ecology and Evolutionary Biology
City:Ann Arbor
State:MI
Zip Code:48109-1048
Country:United States of America
Investigator 4: 
First Name:Chris
Last Name:Crockett
Organization:
Address line 2:
Address line 3:
City:
State:
Zip Code:
Country:
Associate Investigators:
Keywords:alkalinity, ammonium, anions, aquatic ecosystems, arctic, bacteria, bacterial abundance, biogeochemistry, carbon, carbon to nitrogen ratio, chemistry, chlorophyll, chlorophyll a, depth, dissolved nutrients, dissolved organic carbon, freshwater, inorganic nutrients, lakes, limnology, long term monitoring, monitoring, nitrate, nitrite, nitrate plus nitrite, nitrogen, nitrogen compounds, nutrients, organic carbon, organic nitrogen, particulates, particulate carbon, particulate nitrogen, particulate phosphorus, phaeophytin, phaeopigments, phosphate, phosphorus, soluble reactive phosphorus, total nitrogen, total phosphorus, tundra, water, water chemistry, water column, water quality, arctic lakes
Abstract:Yearly file describing the physical/chemical values recorded at various lakes near Toolik Research Station. Sample site descriptors include site, date, time, depth. Depth profiles of physical measures collected in situwith Hydrolab Datasonde in the field include temperature, conductivity, pH, dissolved oxygen in both percent saturation and mg/l, SCUFA chlorophyll-a values in both volts and g/l, and PAR.
For questions about the Metadata and data contact the Investigators.
For information about this web site 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 URL http://metacat.lternet.edu/das/dataAccessServlet?docid=knb-lter-arc.10091&urlTail=lakes/nutrients/data/2002_ArcticLTER_Lakes_nuts.csv
Data File Name 2002_ArcticLTER_Lakes_nuts
Beginning Date 6/17/2002
End Date 8/12/2002
Number of Data Records 305
Other Files to Reference
Availability Status
Quality Control Information
Maintenance Description
Log of Changes: Entered metadata into new metadata form.
Version 2: Updated metadata form to newer version (without site sheet). BD (below dection limit) entries changed to 0, indicated in Notes column. Meta rows from I-series deleted, samples never collected so no data exists for these samples. 12Feb2013 CH.
Version 3: Updated metadata form to newer version with site sheet. CH March 2013.
Version 4: Checked keywords against the LTER network preferred list and replaced non-preferred terms. Jim L 27Jan14
 
RESEARCH LOCATION:                                                          
Location Name Toolik Central E 01 E 05 E 06 I1 I2 I3 I4 I5 I6 I6 headwater lake I7 I8 I swamp I Minus N 02 S 06 S 07 S 11 NE 12 Fog lake 2 Fog lake 4 LTER 321 LTER 349 LTER 362 GTH 83 GTH 85 GTH 86  
Geographic Description Toolik Lake, Main Station Lake E1 Lake E5 Lake E6 Lake I1 Lake I2 Lake I3 Lake I4 Lake I5 Lake I6 Lake I6 Headwaters Lake I7 Lake I8 Lake ISwamp I Minus Lake N2 Lake S6 Lake S7 Lake S11 Lake NE12 Fog 2 Fog 4 LTER 321, GTH 33 LTER 349, Ox creekhead 2, GTH 61 LTER 362, Ox creekhead 1, GTH 74 Lake is called GTH 83 Lake is called GTH 85 Lake is called GTH 86  
Location Bounding Box                                                          
West Bounding Coordinate                                                          
East Bounding Coordinate                                                          
North Bounding Coordinate                                                          
South Bounding Coordinate                                                          
OR if single point location                                                          
Latitude 68.629961 68.6261956028 68.642611 68.6434270583 68.5687130789 68.5713195633 68.5755366301 68.57956715 68.5873874391 68.5965924039 68.582062 68.6008747982 68.6101575207 68.610781 68.55634 68.6409472345 68.6293797816 68.6300627447 68.630148049 68.65 68.6833333333333 68.68 68.5812154042 68.6387235983 68.6179342325 68.5688832145 68.6004190154 68.6324246102  
Longitude -149.612633 -149.555347706 -149.458079 -149.440564592 -149.58807625 -149.565881618 -149.583644456 -149.58405938 -149.589625877 -149.59264335 -149.622932 -149.596582063 -149.582211513 -149.600742 -149.56628 -149.625086307 -149.641623295 -149.644441789 -149.650579145 -149.616666666667 -149.1 -149.071666666667 -149.178742058 -149.178624264 -149.185945853 -149.432996798 -149.438677388 -149.418740628  
Elevation In Meters 762 800 792 785 785 774 770 767 754 806 742 744 736 801 724 731 731 750 699 785 754 891            
Link to Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map View on Google Map  
                                                           
 
TAXONOMIC COVERAGE:
Organisms studied
 
Methods:For field work and sampling protocols see "Sampling and Field Methods Protocol" on The Arctic LTER webpage (http://ecosystems.mbl.edu/ARC/) specific link found below.

All measurements were taken with a DS5 Hydrolab Datasonde. Depth reading on sonde was calibrated in the field so that a depth of 0m was the water surface. For profiles, measurements were taken at surface (~0m), at ~0.5m depth, at ~1m of depth, then at 1m intervals until bottom. Measurements were recorded on a Surveyor 4a datalogger and also recorded in a field book. Values recovered from the Surveyor 4a datalogger were used except where values were either missing or highly suspect, in which case values from the fieldbook were used and noted under the "Notes" column.

This file was created from a working file titled "2009AKLakes". History of the file is listed below:

Date User Changes/Corrections
4-Jul-2005 Dan White Created 2009AKLAKES file from 2008AKLAKES file
4-Jul-2005 Dan White Added first few Toolik Hydrolab cast upto 3Jul in physchem09 and Chl and PO4 data to Nutrients
24-Jul-2005 Dan White Added NH4 data upto 24Jul, and Chl-a data upto 20Jul
25-Jul-2005 Dan White Added Hydrolab casts up to present
27-Jul-2005 Dan White Added PO4 data upto 24Jul
30-Aug-2005 Dan White Added the remainder of the seasons Chl-a values and PO4 values to the Nutrients09 tab
31-Aug-2005 Dan White Added the remainder of the seasons hydrolab casts to the Physchem09 tab
1-Sep-2005 Dan White Added the remainder of the seasons NH4 values to the Nutrients09 tab
6-Oct-2005 Dan White Added in missing date (29 Jul09) hydrolab cast for E5 and E6 on Physchem09 page
6-Oct-2005 Dan White Added missing depth (6m) to hydrolab cast for Lake I8 on 5Aug09 from fieldbook
7-Oct-2005 Dan White Resorted Physchem09 page to put hydrolab casts in order by date
1-Nov-2005 Dan White Added Late-season Toolik hydrolab cast to Physcem09 tab supplied by Christie Haupert

Data Table

Variable Name Variable Description Data Type Units DateTime Format Code Information Missing Value Code
SortChem_# A unique number assigned to each sample collected at a specific site at a specific date and time. The year that the sample was collected is followed by a dash and then a sequential number. For example, if 600 samples were collected in 2002, then the first sample collected is 2002-0001 and the last sample is 2002-0600. text       .=Missing or Not Measured
Site Site Name: Name of the lake where measurements were taken. There are discrete sampling sites defined by water depth, generally they are at the point of maximum depth. text     Toolik Main= the main sampling station on Toolik Lake's largest basin| E= lakes of the E-Series| I=lakes of the I-Series| N=lakes of the N-Series| S=lakes of the S-Series| Fog=lakes of the Fog-Series  
Date Date readings were taken on. datetime   dd-mmm-yyyy    
Dep_m Depth of water sample taken at starting from the surface as 0. number meter   Dup= Duplicate sample  
Chl_ug/l Pheaophytin corrected chlorophyll a concentration from fluorometric analysis of chlorophyll extracted in acetone from 47mm GFF fiter number microgramPerLiter     .=Missing or Not Measured
Pheo_ug/l Pheaophytin concentrations from fluorometric analysis of chlorophyll extracted in acetone from 47mm GFF fiter number microgramPerLiter     .=Missing or Not Measured
NH4OPA_uM Ammonium concentrations from OPA fluorometric analysis number micromolePerLiter     .=Missing or Not Measured
PO4_uM phosphate concentrations from colormetric analysis number micromolePerLiter     .=Missing or Not Measured
NO3_uM nitrate+nitrite concentrations from colormetric analysis number micromolePerLiter     .=Missing or Not Measured
TDN_uM Total dissolved nitrogen number micromolePerLiter     .=Missing or Not Measured
TN_uM Total nitrogen. This value is the sum of TDN and particulate nitrogen number micromolePerLiter     .=Missing or Not Measured
TP_uM Total phosphorus. This value is the sum of TDP and particulate phosphorus number micromolePerLiter     .=Missing or Not Measured
TDP_uM Total dissolved phosphorus number micromolePerLiter     .=Missing or Not Measured
PP-ug/l Particulate phosphorus number microgramPerLiter     .=Missing or Not Measured
PP_uM Particulate phosphorus number micromolePerLiter     .=Missing or Not Measured
PN-ug/l Particulate nitrogen number microgramPerLiter     .=Missing or Not Measured
PN_uM Particulate nitrogen number micromolePerLiter     .=Missing or Not Measured
PC-ug/l Particulate carbon number microgramPerLiter     .=Missing or Not Measured
PC_uM Particulate carbon number micromolePerLiter     .=Missing or Not Measured
Bact_cells/ml Bacteria counts from flow cytometer cells /ml number numberPerMilliliter     .=Missing or Not Measured
UncorChl_ug/l Uncorrected chlorophyll a number microgramPerLiter     .=Missing or Not Measured
Cl_uM Dissolved chloride concentration number micromolePerLiter     .=Missing or Not Measured
SO4_uM Dissolved sulfate concentration number micromolePerLiter     .=Missing or Not Measured
Notes Any additional information pertaining to measurments made for a particular depth, place and time. text       .=Missing or Not Measured
NH4 Indol_uM Ammonium concentrations from indol/ phenol analysis number micromolePerLiter     .=Missing or Not Measured

Please contact arc_im@mbl.edu with questions, comments, or for technical assistance regarding this web site.