ALPS_CO2 English utf8 dataset McMurdo Dry Valleys LTER http://mcmlter.org/ 2016-09-29 ISO 19115-2 Geographic Information - North American Profile Metadata - Data with Biological Extensions ISO 19115-2:2009(E) Lake Bonney Autonomous Lake Profiler and Samplers (ALPS): Dissolved CO2 Concentrations 2016-09-29 publication Peter Doran Louisiana State University http://lsu.edu pdoran@lsu.edu https://www.lsu.edu/science/geology/people/faculty/doran.php pointOfContact Cristina Takacs-Vesbach University of New Mexico https://www.unm.edu/ cvesbach@unm.edu http://www.wildmicrobiome.org pointOfContact John Priscu Montana State University http://www.montana.edu/ jpriscu@montana.edu pointOfContact documentDigital 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. Name: Luke Winslow Role: field crew Name: Heather Buelow Role: field crew Name: Jeff Patriarche Role: field crew Name: Maciej K. Obryk Role: field crew Name: Amy Chiuchiolo Role: lab crew Name: Jeff Patriarche Role: lab crew Name: Luke Winslow Role: data manager Name: Inigo San Gil Role: data manager completed McMurdo Dry Valleys LTER http://mcmlter.org/ unknown Metadata and data prepared by Luke Winslow and Inigo San Gil, Oct 2016 English Lake Bonney is a saline lake with permanent ice cover at the western end of Taylor Valley in the McMurdo Dry Valleys of Victoria Land, Antarctica. It is 7 kilometres or 4.3 mi long and up to 900 metres or 3,000 ft wide. A narrow channel only 50 metres or 160 ft wide. Lake Bonney at Narrows separates the lake into East Lake Bonney 3.32 square kilometres or 1.28 sq mi and West Lake Bonney, 0.99 square kilometres or 0.38 sq mi. Valley: Taylor Distance to Sea : 28 Maximum Length (km): 2.6 Maximum Width (km): 0.9 Maximum Depth (m): 40 Surface Area (km^2): 0.99 Ice Thickness Average Surface (m): 2.8-4.5 Volume (m^3 * 10^6): 10.1 162.354934692383 162.269104003906 -77.727287292480 -77.714805603027 Lake Bonney is a saline lake with permanent ice cover at the western end of Taylor Valley in the McMurdo Dry Valleys of Victoria Land, Antarctica. It is 7 kilometres or 4.3 mi long and up to 900 metres or 3,000 ft wide. A narrow channel only 50 metres or 160 ft wide. Lake Bonney at Narrows separates the lake into East Lake Bonney 3.32 square kilometres or 1.28 sq mi and West Lake Bonney, 0.99 square kilometres or 0.38 sq mi. The west lobe is flanked by Taylor glacier. Valley: Taylor Distance to Sea : 25 Maximum Length (km): 4.8 Maximum Width (km): 0.9 Maximum Depth (m): 37 Surface Area (km^2): 3.32 Ice Thickness Average Surface (m): 3 - 4.5 Volume (m^3 * 10^6): 54.7 162.536209106445 162.353210449219 -77.724441528320 -77.697700500488 ground condition 2013-12-13 2014-12-14 https://mcm.lternet.edu/sites/default/files/data/ALPS_ELB_CO2_highrange.csv ALPS_ELB_CO2_highrange eng; US McMurdo Dry Valleys LTER ALPS_ELB_CO2_highrange Data Source Definition : Description of the units and the details about the CO2 high range data container. Record Delimiter : \r\n Number of Header Lines : 1 Orientation : Column Field Delimiter : , false DATE_TIME Date and time when this data point was acquired Date Time Format: MM/DD/YYYY HH24:Mi:s co2_value_highrange CO2 concentration from high-range sensor (0-2%) Sensor Internal Temperature Internal sensor temperature DBF https://mcm.lternet.edu/sites/default/files/data/ALPS_ELB_CO2_highrange.csv https://mcm.lternet.edu/sites/default/files/data/ALPS_ELB_CO2_lowrange.csv ALPS_ELB_CO2_lowrange eng; US McMurdo Dry Valleys LTER ALPS_ELB_CO2_lowrange Data Source Definition : Description of the units and the details about the CO2 low range data container. Record Delimiter : \r\n Number of Header Lines : 1 Orientation : Column Field Delimiter : , false DATE_TIME Date and time when this data point was acquired Date Time Format: MM/DD/YYYY HH24:Mi:s CO2 Concentration Low Range CO2 concentration from low-range sensor (0-2000 ppm) Sensor Internal Temperature Internal sensor temperature DBF https://mcm.lternet.edu/sites/default/files/data/ALPS_ELB_CO2_lowrange.csv https://mcm.lternet.edu/sites/default/files/data/ALPS_WLB_CO2_lowrange.csv ALPS_WLB_CO2_lowrange eng; US McMurdo Dry Valleys LTER ALPS_WLB_CO2_lowrange Data Source Definition : Description of the units and the details about the CO2 low range data container. Record Delimiter : \r\n Number of Header Lines : 1 Orientation : Column Field Delimiter : , false DATE_TIME Date and time when this data point was acquired Date Time Format: MM/DD/YYYY HH24:Mi:s CO2 Concentration Low Range CO2 concentration from low-range sensor (0-2000 ppm) Sensor Internal Temperature Internal sensor temperature DBF https://mcm.lternet.edu/sites/default/files/data/ALPS_WLB_CO2_lowrange.csv https://mcm.lternet.edu/sites/default/files/data/ALPS_WLB_CO2_highrange.csv ALPS_WLB_CO2_highrange eng; US McMurdo Dry Valleys LTER ALPS_WLB_CO2_highrange Data Source Definition : Description of the units and the details about the CO2 high range data container. Record Delimiter : \r\n Number of Header Lines : 1 Orientation : Column Field Delimiter : , false DATE_TIME Date and time when this data point was acquired Date Time Format: MM/DD/YYYY HH24:Mi:s co2_value_highrange CO2 concentration from high-range sensor (0-2%) Sensor Internal Temperature Internal sensor temperature DBF https://mcm.lternet.edu/sites/default/files/data/ALPS_WLB_CO2_highrange.csv dataset 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. Metadata Access Constraints: none Metadata Use Constraints: none annually McMurdo Dry Valleys LTER http://mcmlter.org/ pointOfContact