limndin.dat English utf8 dataset McMurdo Dry Valleys LTER http://mcmlter.org/ 2014-11-04 ISO 19115-2 Geographic Information - North American Profile Metadata - Data with Biological Extensions ISO 19115-2:2009(E) Dissolved Inorganic Nitrogen Concentrations in Lakes 2014-11-04 publication John Priscu Montana State University http://www.montana.edu/ jpriscu@montana.edu pointOfContact documentDigital 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. Name: Amy Chiuchiolo Role: associated researcher Name: Kathleen A. Welch Role: lab crew Name: Chris Gardner Role: data manager Name: Inigo San Gil Role: data manager completed McMurdo Dry Valleys LTER http://mcmlter.org/ unknown 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. English ground condition 1993-10-10 2014-10-31 https://mcm.lternet.edu/sites/default/files/data/LIMNO_DIN_0.csv limndin eng; US McMurdo Dry Valleys LTER limndin Record Delimiter : \n Number of Header Lines : 28 Number of Footer Lines : 1 Orientation : Column Quote Character : "Field Delimiter : , false DATASET_CODE Code to designate the table name LIMNO_RUN Code for lake's sampling location and date Location Name Name of lake where measurement was made Location Code Code for site where measurement was made DATE_TIME Date on which sample was gathered Date Time Format: mm/dd/yyyy Depth (m) Distance below the piezometric water level from which sample was drawn. DIN (uM) Dissolved inorganic nitrogen concentration found at lake depth DIN Comments Helpful hints about the DIN sample File Name Name of file in which data was submitted DEPTH MASL Depth referred to the Sea level. Distance below Mean Average Sea wa ter level reference from which sample was drawn DBF https://mcm.lternet.edu/sites/default/files/data/LIMNO_DIN_0.csv dataset 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. Metadata Access Constraints: none Metadata Use Constraints: none annually McMurdo Dry Valleys LTER http://mcmlter.org/ pointOfContact