Published on McMurdo Dry Valleys LTER (http://mcm.lternet.edu)

Summary

Abstract: 

We installed dissolved oxygen sensors in three locations on a supraglacial stream network on Canada Glacier in Taylor Valley, Antarctica in conjunction with a series of nutrient tracer injection experiments. This data collection was intended to provide context for respiration and primary productivity via dissolved oxygen dynamics during our nutrient tracer injections. Sensors were deployed a day before the start of the tracer series and collected on the last day of experiments. Over the course of their deployment, two of the three locations had issues with freezing around the sensor and produced large artifacts (swings) in the data. 

Date Range: 

January 13, 2019 to January 20, 2019
Dataset(s)

Description: 

Supraglacial Dissolved Oxygen Data

Variables (click to expand): 

DATASET_CODE
  • Label: Dataset code
  • Definition: Internal dataset code.
  • Type: Nominal
  • Missing values: None specified
DATE_TIME
  • Label: Date and time
  • Definition: Date and time of measurement (GMT+13).
  • Type: Date/time
  • Date format: MM/DD/YYYY HH:MM:SS
  • Missing values: None specified
DO_RAWCONC_MGL_R1
  • Label: Raw dissolved oxygen concentration in reach 1
  • Definition: Uncorrected dissolved oxygen concentration in Reach 1.
  • Type: Physical quantity
  • Unit: milligramsPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • BLANK = missing
TEMP_C_R1
  • Label: Temperature in reach 1
  • Definition: Water/air temperature in Reach 1.
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • BLANK = missing
DO_ADJ_CONC_MGL_R1
  • Label: Adjusted dissolved oxygen concentration in reach 1
  • Definition: Post-processed dissolved oxygen concentration in Reach 1.
  • Type: Physical quantity
  • Unit: milligramsPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • BLANK = missing
DO_PERCENT_SAT_R1
  • Label: Percent saturation of dissolved oxygen in reach 1
  • Definition: Percent saturation of dissolved oxygen in Reach 1.
  • Type: Physical quantity
  • Unit: percent
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • BLANK = missing
DO_RAWCONC_MGL_R2
  • Label: Raw dissolved oxygen concentration in reach 2
  • Definition: Uncorrected dissolved oxygen concentration in Reach 2.
  • Type: Physical quantity
  • Unit: milligramsPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • BLANK = missing
TEMP_C_R2
  • Label: Temperature in reach 2
  • Definition: Water/air temperature in Reach 2.
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • BLANK = missing
DO_ADJ_CONC_MGL_R2
  • Label: Adjusted dissolved oxygen concentration in reach 2
  • Definition: Post-processed dissolved oxygen concentration in Reach 2.
  • Type: Physical quantity
  • Unit: milligramsPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • BLANK = missing
DO_PERCENT_SAT_R2
  • Label: Percent saturation of dissolved oxygen in reach 2
  • Definition: Percent saturation of dissolved oxygen in Reach 2.
  • Type: Physical quantity
  • Unit: percent
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • BLANK = missing
DO_RAWCONC_MGL_R3
  • Label: Raw dissolved oxygen concentration in reach 3
  • Definition: Uncorrected dissolved oxygen concentration in Reach 3.
  • Type: Physical quantity
  • Unit: milligramsPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • BLANK = missing
TEMP_C_R3
  • Label: Temperature in reach 3
  • Definition: Water/air temperature in Reach 3.
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • BLANK = missing
DO_ADJ_CONC_MGL_R3
  • Label: Adjusted dissolved oxygen concentration in reach 3
  • Definition: Post-processed dissolved oxygen concentration in Reach 3.
  • Type: Physical quantity
  • Unit: milligramsPerLiter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • BLANK = missing
DO_PERCENT_SAT_R3
  • Label: Percent saturation of dissolved oxygen in reach 3
  • Definition: Percent saturation of dissolved oxygen in Reach 3.
  • Type: Physical quantity
  • Unit: percent
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values:
    • BLANK = missing

File: 

GLACIER_SUPRA_DO.csv [1] (176.46 KB)

...or query the dataset by variables and dates of interest:

[2]

Short name: 

GLACIER_SUPRA_DO

Dataset ID: 

2018
People

Principal Investigator(s): 

Anna J. Bergstrom [3]
Michael N. Gooseff [4]

Contact: 

McMurdo Dry Valleys LTER Information Manager [5]

Associated Personnel: 

Field Technician
Joel Singley [6]
Associated Researcher
Matthew J. Cohen [7]
Data Manager
Renée F. Brown [8]
Methodology

Methods: 

We calibrated 3 dissolved oxygen and temperature loggers immediately prior to deployment and placed them in three reaches to record on a 5 min interval. The three stream reaches were located on the lower Canada Glacier ablation zone in Taylor Valley, Antarctica (Reach 1: -77.62767, 163.96059; Reach 2: -77.6281, 163.957583; Reach 3: -77.629258, 163.964103). Sensors used were HOBO Dissolved Oxygen Logger U26-001, In-Situ Inc. During the course of time that the loggers were deployed, tracers were released in Reach 1 at 10:20:00 on 1/17/19 (NaNO3- and NaCl) and 10:20:00 on 1/18/19 (NaNO3- , KH2PO4-  and NaCl); in Reach 2 at 13:00:00 on 1/14/19 (NaNO3- and NaCl), at 10:40:00 on 1/15/19 (NaNO3- , KH2PO4-  and NaCl), at 10:20:00 on 1/16/19 (NaNO3- , KH2PO4-, glucose, and NaCl), and at 12:25:00 on 1/19/19 (NaNO3-, glucose, and NaCl); and in Reach 3 at 12:45:00 on 1/17/19 (NaNO3- and NaCl) and 12:15:00 on 1/18/19 (NaNO3- , KH2PO4-  and NaCl). Over the course of their deployment, two of the three locations had issues with freezing around the sensor and produced large artifacts (swings) in the data. In addition, the sensor located in Reach 3 was removed from the water briefly and repositioned around 11:00 on 1/15/19. Raw dissolved oxygen concentrations were post-processed and corrected for atmospheric pressure. Pressure timeseries was measured using a barometer (HOBO Water Level (13 ft) Data Logger- U20L-04, In-Situ Inc.) co-located with the dissolved oxygen sensor on Reach 2. The tracer experiment data collected concurrently are also available on the MCM LTER database and provide further information on the tracer methods and data. 

Categories

Research Section: 

Core Areas: 

MCM Keywords: 

Keywords: 

Source URL: http://mcm.lternet.edu/content/dissolved-oxygen-measurements-supraglacial-streams-canada-glacier-antarctica-january-2019

Links
[1] http://mcm.lternet.edu/file/6257/download?token=ptjlI0f35ErL9hDeneD-671D58OoMTc6wKRkq46UH6s
[2] http://mcm.lternet.edu/node/4400/data
[3] http://mcm.lternet.edu/people/anna-j-bergstrom
[4] http://mcm.lternet.edu/people/michael-n-gooseff
[5] http://mcm.lternet.edu/people/mcmurdo-dry-valleys-lter-information-manager
[6] http://mcm.lternet.edu/people/joel-singley
[7] http://mcm.lternet.edu/people/matthew-j-cohen
[8] http://mcm.lternet.edu/people/ren%C3%A9e-f-brown
[9] http://mcm.lternet.edu/section/glaciers
[10] http://mcm.lternet.edu/core-areas/primary-production
[11] http://mcm.lternet.edu/station-keywords/antarctica
[12] http://mcm.lternet.edu/station-keywords/glacier
[13] http://mcm.lternet.edu/station-keywords/ice
[14] http://mcm.lternet.edu/station-keywords/primary-productivity
[15] http://mcm.lternet.edu/station-keywords/respiration
[16] http://mcm.lternet.edu/lter-controlled-vocabulary/dissolved-oxygen
[17] http://mcm.lternet.edu/lter-controlled-vocabulary/ice
[18] http://mcm.lternet.edu/lter-controlled-vocabulary/metabolism
[19] http://mcm.lternet.edu/lter-controlled-vocabulary/respiration