Lake Bonney Autonomous Lake Profiler and Samplers (ALPS): Dissolved CO2 Concentrations

Summary

Abstract: 

Knowledge of the McMurdo Dry Valley (MDV) lakes is limited by winter access, a period which is most relevant in understanding the habitability of other icy worlds and critical to understanding the overall function of these lakes. Owing to the lack of winter access, data that normally require human presence are incomplete. Our goal was to conduct the first year-round investigation of the biogeophysics of these unique lakes. An important part of the McMurdo Long Term Ecological Research (LTER) is evaluating carbon and nitrogen budgets in perennial ice-covered lakes. This data set addresses this core area of research and quantifies the dissolved CO 2 concentrations found at specific depths in McMurdo Dry Valley lakes.

Date Range: 

Friday, December 13, 2013 to Sunday, December 14, 2014

Description of the units and the details about the CO2 high range data container.

Download ALPS_ELB_CO2_highrange.csv (15.63 MB)

Variables (click to expand): 

DATE_TIME
  • Label:
  • Definition: Date and time when this data point was acquired
  • Type: Date/time
  • Date format: MM/DD/YYYY HH24:Mi:s
  • Missing values: None specified
co2_value_highrange
  • Label:
  • Definition: CO2 concentration from high-range sensor (0-2%)
  • Type: Physical quantity
  • Unit: partsPerHundred
  • Maximum: 2
  • Minimum: 0
  • Precision: .01
  • Missing values: None specified
Sensor Internal Temperature
  • Label: internal_temp
  • Definition: Internal sensor temperature
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: 10
  • Minimum: 0
  • Precision: .01
  • Missing values: None specified

Description of the units and the details about the CO2 low range data container.

Download ALPS_ELB_CO2_lowrange.csv (15.17 MB)

Variables (click to expand): 

DATE_TIME
  • Label:
  • Definition: Date and time when this data point was acquired
  • Type: Date/time
  • Date format: MM/DD/YYYY HH24:Mi:s
  • Missing values: None specified
CO2 Concentration Low Range
  • Label: co2_value_lowrange
  • Definition: CO2 concentration from low-range sensor (0-2000 ppm)
  • Type: Physical quantity
  • Unit: partsPerMillion
  • Maximum: 4000
  • Minimum: 0
  • Precision: .1
  • Missing values: None specified
Sensor Internal Temperature
  • Label: internal_temp
  • Definition: Internal sensor temperature
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: 10
  • Minimum: 0
  • Precision: .01
  • Missing values: None specified

Description of the units and the details about the CO2 low range data container.

Download ALPS_WLB_CO2_lowrange.csv (15.17 MB)

Variables (click to expand): 

DATE_TIME
  • Label:
  • Definition: Date and time when this data point was acquired
  • Type: Date/time
  • Date format: MM/DD/YYYY HH24:Mi:s
  • Missing values: None specified
CO2 Concentration Low Range
  • Label: co2_value_lowrange
  • Definition: CO2 concentration from low-range sensor (0-2000 ppm)
  • Type: Physical quantity
  • Unit: partsPerMillion
  • Maximum: 4000
  • Minimum: 0
  • Precision: .1
  • Missing values: None specified
Sensor Internal Temperature
  • Label: internal_temp
  • Definition: Internal sensor temperature
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: 10
  • Minimum: 0
  • Precision: .01
  • Missing values: None specified

Description of the units and the details about the CO2 high range data container.

Download ALPS_WLB_CO2_highrange.csv (15.63 MB)

Variables (click to expand): 

DATE_TIME
  • Label:
  • Definition: Date and time when this data point was acquired
  • Type: Date/time
  • Date format: MM/DD/YYYY HH24:Mi:s
  • Missing values: None specified
co2_value_highrange
  • Label:
  • Definition: CO2 concentration from high-range sensor (0-2%)
  • Type: Physical quantity
  • Unit: partsPerHundred
  • Maximum: 2
  • Minimum: 0
  • Precision: .01
  • Missing values: None specified
Sensor Internal Temperature
  • Label: internal_temp
  • Definition: Internal sensor temperature
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: 10
  • Minimum: 0
  • Precision: .01
  • Missing values: None specified

DOI: 

10.6073/pasta/928ab7198ef209d76ea7ab4004ec6be7

Short name: 

ALPS_CO2

Dataset ID: 

303
People

Principal Investigator(s): 

Peter T. Doran
Louisiana State University
Cristina D. Takacs-Vesbach
University of New Mexico
John C. Priscu
Montana State University

Contact: 

McMurdo Dry Valleys LTER

Associated Personnel: 

Field Crew
Luke Winslow
Field Crew
Heather Buelow
Field Crew
Jeff Patriarche
Field Crew
Maciej K. Obryk
Lab Crew
Amy Chiuchiolo
Lab Crew
Jeff Patriarche
Data Manager
Luke Winslow
Data Manager
Inigo San Gil
Related

Related publications: 

Autonomous Year-Round Sampling and Sensing to Explore the Physical and Biological Habitability of Permanently Ice-Covered Antarctic Lakes
Methodology

Methods: 

Through the ice, wire-walking profilers (McLane Labs Ice Tethered Profilers [ITPs]) were deployed in both lobs of Lake Bonney. Attached to the ITPs were sensors for dissolved CO2 (Pro-Oceanus XXX). The ITPs were programmed to profile once daily around regional solar noon. A profile consisted of one downward and one upward movement to the furthest reach of the profilers possible movement, or the bottom of the lake or bottom of the ice, whichever limit came first. During the profiles, CO2 concentration was recorded every XXX seconds. Because the CO2 sensor did not contain its own pressure sensor, pressure from the CTD endcap was matched with dissolved CO2 observations based on time.

Maintenance: 

Metadata and data prepared by Luke Winslow and Inigo San Gil, Oct 2016

Metadata Download
EML, ISO Not for humans
Categories

MCM Keywords: 

Research Section: 

Keywords: