uid=MCM,o=EDI,dc=edirepository,dc=org all public read limndin.dat Dissolved Inorganic Nitrogen Concentrations in Lakes John Priscu jpriscu@montana.edu https://orcid.org/0000-0001-5807-6364 McMurdo Dry Valleys LTER http://mcmlter.org/ Amy Chiuchiolo
LRES, 334 Leon Johnson Hall Bozeman MT 59717 US
(406) 994-2360 (406) 994-5863 achiuchiolo@montana.edu associated researcher
Kathleen Welch kathleen.welch@colorado.edu https://orcid.org/0000-0003-1028-3086 lab crew Chris Gardner gardner.177@osu.edu https://orcid.org/0000-0003-0400-3754 data manager Inigo San Gil
Department of Biology, MSC03 2020 University of New Mexico Albuquerque NM 87131 US
(505) 277-2625 (505) 277-2541 isangil@lternet.edu data manager
2015-10-08 English
The McMurdo Long Term Ecological Research (LTER) project monitors patterns of inorganic material transport in perennial ice-capped lakes. This data set addresses this core area of research and quantifies dissolved inorganic nitrogen concentrations at specific depths in McMurdo Dry Valley lakes.
Antarctica DIN inorganic lake limnology nitrogen Station Keywords dissolved inorganic nitrogen lakes LTER Controlled Vocabulary
Data Policies This data package is released under the Creative Commons Attribution 4.0 International License (CC BY 4.0; http://creativecommons.org/licenses/by/4.0/), which allows consumers (hereinafter referred to as “Data Users”) to freely reuse, redistribute, transform, or build on this work (even commercially) so long as appropriate credit is provided. Accordingly, Data Users are required to properly cite this data package in any publications or in the metadata of any derived products that result from its use (in whole or in part). A recommended citation is provided on the summary metadata page associated with this data package in the McMurdo Dry Valleys LTER Data Catalog (https://mcmlter.org/data), and a generic citation may be found on the summary metadata page in the repository where this data package was obtained. When these data contribute significantly to the contents of a publication, Data Users must also acknowledge that data were provided by the NSF-supported McMurdo Dry Valleys Long Term Ecological Research program (OPP-1637708). This data package has been released in the spirit of open scientific collaboration. Hence, Data Users are strongly encouraged to consider consultation, collaboration, and/or co-authorship (as appropriate) with the data package creator(s). Data Users should be aware these data may be actively used by others for ongoing research; thus, coordination may be necessary to prevent duplicate publication. Data Users should also recognize that misinterpretation of data may occur if they are used outside the context of the original study. Hence, Data Users are urged to contact the data package creator(s) if they have any questions regarding methodology or results. While substantial efforts are made to ensure the accuracy of this data package (with all its components), complete accuracy cannot be guaranteed. Periodic updates to this data package may occur, and it is the responsibility of Data Users to check for new versions. This data package is made available “as is” and comes with no warranty of accuracy or fitness for use. The creator(s) of this data package and the repository where these data were obtained shall not be liable for any damages resulting from misinterpretation, use, or misuse of these data. Finally, as a professional courtesy, we kindly request Data Users notify the primary contact referenced in the metadata when these data are used in the production of any derivative work or publication. Notification should include an explanation of how the data were used, along with a digital copy of the derived product(s). Thank you.
https://mcm.lternet.edu/content/dissolved-inorganic-nitrogen-concentrations-lakes 1993-10-10 2014-10-31 2015 - data and metadata now managed using the Drupal Ecological Information Management System.  Data created as derivative of LIMNO_NUTRIENTS -- the sum of NH4, NO2 and NO3.    Data from this table was submitted to INSTAAR by John Priscu's team at Montana State University. The raw data file listed under 'file name' is the name of the original file submitted. The 1996/97 and 1997/98 datasets are ascii text files. Upon arrival at INSTAAR, the data manager fine-tuned the location codes and limno runs to match those provided in the "locations, dates, codes for lake chemistry, biology samples" file. The file was imported into Microsoft Access on INSTAAR's Unix system, and can currently be found there. The file was then exported in ascii, comma delimited text and MS-DOS text (table layout) to present on the MCM LTER web site. Both of these files are linked to this web page above. Information for the metadata was obtained from the Metanut9697.rtf file. The file was called up using Microsoft Word version 6.0. Text from this file was used to create this page in html format. McMurdo Dry Valleys LTER http://mcmlter.org/ McMurdo Dry Valleys LTER http://mcmlter.org/ McMurdo Dry Valleys LTER
Lake water samples were collected at specific depths with a five-liter Niskin bottle during normal LTER limnological sampling. Sub-samples were decanted into three-1 L Nalgene bottles (2-light and 1-amber), two-500 mL amber Nalgene bottles, three-150 mL borosilicate glass bottles, two-20 mL scintillation vials, and one-30 mL serum vial. One-100 mL sub-sample was taken from the one-liter amber Nalgene bottle. The sample was filtered through a combusted (475 degrees C for 4 hours) Whatman 25 mm GF/F filter using a bell jar apparatus. The filtrate was collected in a 125 mL acid washed Nalgene bottle and stored at -20 degrees C until analysis by ASA analytical chemist performed the nutrient assays with a Lachat Quickchem AE Autoanalyzer using standard methods.
limndin LIMNO_DIN.csv 610183 28 1 \n column , " https://mcm.lternet.edu/sites/default/files/data/LIMNO_DIN_0.csv DATASET_CODE DATASET_CODE Code to designate the table name string Code to designate the table name LIMNO_RUN Limno Run Code for lake's sampling location and date string Code for lake's sampling location and date Location Name Location Name Name of lake where measurement was made string Name of lake where measurement was made Location Code Location Code Code for site where measurement was made string Code for site where measurement was made DATE_TIME Date Date on which sample was gathered date mm/dd/yyyy Depth (m) Depth (m) Distance below the piezometric water level from which sample was drawn. meter 1 real 1 45 DIN (uM) DIN (uM) Dissolved inorganic nitrogen concentration found at lake depth microM 0.01 real 0 1500 Null None given DIN Comments DIN Comments Helpful hints about the DIN sample string Helpful hints about the DIN sample File Name File Name Name of file in which data was submitted string Name of file in which data was submitted DEPTH MASL DEPTH MASL Depth referred to the Sea level. Distance below Mean Average Sea wa ter level reference from which sample was drawn meter 1 real