Dissolved Inorganic Nitrogen Concentrations in Lakes

Summary

Abstract: 

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.

Date Range: 

October 10, 1993 to October 31, 2014
Data Citation
Priscu, J.C. 2015. Dissolved Inorganic Nitrogen Concentrations in Lakes. Environmental Data Initiative. DOI: 10.6073/pasta/8a32b31bdf6daec942898461b31c77f0. Dataset accessed 13 September 2024.
Dataset(s)

Variables (click to expand): 

DATASET_CODE
  • Label:
  • Definition: Code to designate the table name
  • Type: Nominal
  • Missing values: None specified
LIMNO_RUN
  • Label: Limno Run
  • Definition: Code for lake's sampling location and date
  • Type: Nominal
  • Missing values: None specified
Location Name
  • Label:
  • Definition: Name of lake where measurement was made
  • Type: Nominal
  • Missing values: None specified
Location Code
  • Label:
  • Definition: Code for site where measurement was made
  • Type: Nominal
  • Missing values: None specified
DATE_TIME
  • Label: Date
  • Definition: Date on which sample was gathered
  • Type: Date/time
  • Date format: mm/dd/yyyy
  • Missing values: None specified
Depth (m)
  • Label:
  • Definition: Distance below the piezometric water level from which sample was drawn.
  • Type: Physical quantity
  • Unit: meter
  • Maximum: 45
  • Minimum: 1
  • Precision: 1
  • Missing values: None specified
DIN (uM)
  • Label:
  • Definition: Dissolved inorganic nitrogen concentration found at lake depth
  • Type: Physical quantity
  • Unit: microM
  • Maximum: 1500
  • Minimum: 0
  • Precision: 0.01
  • Missing values:
    • Null = None given
DIN Comments
  • Label:
  • Definition: Helpful hints about the DIN sample
  • Type: Nominal
  • Missing values: None specified
File Name
  • Label:
  • Definition: Name of file in which data was submitted
  • Type: Nominal
  • Missing values: None specified
DEPTH MASL
  • Label:
  • Definition: Depth referred to the Sea level. Distance below Mean Average Sea wa ter level reference from which sample was drawn
  • Type: Physical quantity
  • Unit: meter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: 1
  • Missing values: None specified

File: 

LIMNO_DIN.csv (595.88 KB)

Short name: 

limndin.dat

Dataset ID: 

58
People

Principal Investigator(s): 

John C. Priscu

Contact: 

McMurdo Dry Valleys LTER

Associated Personnel: 

Associated Researcher
Amy Chiuchiolo
Lab Crew
Kathleen A. Welch
Data Manager
Chris Gardner
Data Manager
Inigo San Gil
Related
Methodology

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.

Maintenance: 

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.

Additional information: 

Categories

Research Section: 

MCM Keywords: 

Keywords: 

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