John C. Priscu 2014-11-04 tabular digitial data McMurdo Dry Valleys LTER McMurdo Dry Valleys LTER 10.6073/pasta/8a32b31bdf6daec942898461b31c77f0 https://mcm.lternet.edu/content/dissolved-inorganic-nitrogen-concentrations-lakes 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. 1993-10-10 2014-10-31 ground condition 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. As needed [term:vocabulary] None <cntorg>McMurdo Dry Valleys LTER</cntorg> <onlink>http://mcmlter.org/</onlink> <span property="dc:title" content="McMurdo Dry Valleys LTER" class="rdf-meta element-hidden"></span> 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 Not Applicable Not Applicable Field and/or Lab Methods 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. 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. unknown limndin DATASET_CODE Code to designate the table name The data provider Code to designate the table name Limno Run Code for lake's sampling location and date The data provider Code for lake's sampling location and date Location Name Name of lake where measurement was made The data provider Name of lake where measurement was made Location Code Code for site where measurement was made The data provider Code for site where measurement was made Date Date on which sample was gathered The data provider calendar date/time mm/dd/yyyy gregorian calendar Depth (m) Distance below the piezometric water level from which sample was drawn. The data provider 1 45 meter 1 DIN (uM) Dissolved inorganic nitrogen concentration found at lake depth The data provider 0 1500 microM 0.01 DIN Comments Helpful hints about the DIN sample The data provider Helpful hints about the DIN sample File Name Name of file in which data was submitted The data provider 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 The data provider meter 1 McMurdo Dry Valleys LTER The data distributor shall not be liable for innacuracies in the content http 1 0 \n 28 column , https://mcm.lternet.edu/sites/default/files/data/LIMNO_DIN_0.csv None 2014-11-04 2014-11-04 McMurdo Dry Valleys LTER http://mcmlter.org/ Biological Data Profile of the Content Standards for Digital Geospatial Metadata devised by the Federal Geographic Data Committee. Drupal Ecological information Management Systems, version D7, Biological Data Profile module