Arctic LTER Database

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 ID:	2004AKLakes_nuts.03
Dataset Title:	Nutrient and chemical data for various lakes near Toolik Research Station, Arctic LTER, Summer 2004.
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, 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 ecological research, long term monitoring, monitoring, nitrate, nitrite, nitrate + nitrite, nitrogen, nitrogen compounds, nutrients, organic carbon, organic nitrogen, particulate, particulate carbon, particulate nitrogen, particulate phosphorus, phaeophytin, phaeopigments, phosphate, phosphorus, profiles, sampling, soluble reactive phosphorus, total nitrogen, total phosphorus, tundra, water, water chemistry, water column, water quality,
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 µg/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.10081&urlTail=lakes/nutrients/data/2004_ArcticLTER_Lakes_nuts.csv
Data File Name	2004_ArcticLTER_Lakes_nuts
Beginning Date	6/16/2004
End Date	8/23/2004
Number of Data Records	376
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. 12Feb13 CH.
	Version 3: Updated metadata form to newer version with site sheet. Note: Need site coordinates for Pump Station 3/ Hidden Lake. CH March 2013.

RESEARCH LOCATION:
Location Name	Toolik Central	Toolik Inlet	Toolik inlet bay	E 01	E 05	E 06	I1	I2	I3	I4	I5	I6	I6 headwater lake	I7	I8	I swamp	N 01	N 02	S 06	S 07	S 11	NE 9B	Fog lake 2	Fog lake 4	Green Cabin Lake	I Minus 01
Geographic Description	Toolik Lake, Main Station	Toolik Lake inlet	Toolik inlet bay	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	Lake N1	Lake N2	Lake S6	Lake S7	Lake S11	Lake NE9B	Fog 2	Fog 4	Green Cabin Lake	I Minus 1
Location Bounding Box
West Bounding Coordinate
East Bounding Coordinate
North Bounding Coordinate
South Bounding Coordinate
OR if single point location
Latitude	68.629961	68.629961	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	68.6398939358	68.6409472345	68.6293797816	68.6300627447	68.630148049	68.6526454831	68.6833333333333	68.68	68.53698	68.55361
Longitude	-149.612633	-149.612633	-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	-149.606965643	-149.625086307	-149.641623295	-149.644441789	-149.650579145	-149.599473662	-149.1	-149.071666666667	-149.2374	-149.53397
Elevation	719	719	719	762	800	792	785	785	774	770	767	754	806	742	744	736	731	724	731	731	750	747	785	754	883	820
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

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	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.