Dissolved oxygen measurements in supraglacial streams on Canada Glacier, Antarctica, January 2019

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 (176.46 KB)

Short name:

GLACIER_SUPRA_DO

Dataset ID:

2018

People

Principal Investigator(s):

Anna J. Bergstrom

Michael N. Gooseff

Contact:

McMurdo Dry Valleys LTER Information Manager

Associated Personnel:

Field Technician

Associated Researcher

Data Manager

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.