uid=MCM,o=EDI,dc=edirepository,dc=org all public read Lake Bonney Autonomous Lake Profiler and Samplers (ALPS): Conductivity, Temperature, and Pressure Peter Doran pdoran@lsu.edu https://www.lsu.edu/science/geology/people/faculty/doran.php https://orcid.org/0000-0002-3774-2847 John Priscu jpriscu@montana.edu https://orcid.org/0000-0001-5807-6364 Cristina Takacs-Vesbach cvesbach@unm.edu http://www.vesbachlab.org https://orcid.org/0000-0002-5535-2201 McMurdo Dry Valleys LTER http://mcmlter.org/ Luke Winslow 608-821-3914 lwinslow@usgs.gov http://cida.usgs.gov/people/lwinslow.html field crew Heather Buelow
University of New Mexico Albuquerque NM 87131 US
hnbuelow@gmail.com https://scholar.google.com/citations?user=Ut_MuNcAAAAJ&hl=en field crew
Jeff Patriarche
334 Leon Johnson Hall Bozeman MT 59717 US
j.patriarche@gmail.com field crew
Maciej Obryk
Cascades Volcano Observatory Vancouver WA 98683 US
maciej.obryk@gmail.com https://orcid.org/0000-0002-8182-8656 field crew
Inigo San Gil
Department of Biology, MSC03 2020 University of New Mexico Albuquerque NM 87131 US
(505) 277-2625 (505) 277-2541 isangil@lternet.edu data manager
2017-02-14 English
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 vertical profile of conductivity, temperature, and pressure in Lake Bonney.
lake limnology temperature Station Keywords lakes limnology salinity temperature LTER Controlled Vocabulary
Data Policies This data package is released under the Creative Commons Attribution 4.0 International License (CC BY 4.0; http://creativecommons.org/licenses/by/4.0/), which allows consumers (hereinafter referred to as “Data Users”) to freely reuse, redistribute, transform, or build on this work (even commercially) so long as appropriate credit is provided. Accordingly, Data Users are required to properly cite this data package in any publications or in the metadata of any derived products that result from its use (in whole or in part). A recommended citation is provided on the summary metadata page associated with this data package in the McMurdo Dry Valleys LTER Data Catalog (https://mcmlter.org/data), and a generic citation may be found on the summary metadata page in the repository where this data package was obtained. When these data contribute significantly to the contents of a publication, Data Users must also acknowledge that data were provided by the NSF-supported McMurdo Dry Valleys Long Term Ecological Research program (OPP-1637708). This data package has been released in the spirit of open scientific collaboration. Hence, Data Users are strongly encouraged to consider consultation, collaboration, and/or co-authorship (as appropriate) with the data package creator(s). Data Users should be aware these data may be actively used by others for ongoing research; thus, coordination may be necessary to prevent duplicate publication. Data Users should also recognize that misinterpretation of data may occur if they are used outside the context of the original study. Hence, Data Users are urged to contact the data package creator(s) if they have any questions regarding methodology or results. While substantial efforts are made to ensure the accuracy of this data package (with all its components), complete accuracy cannot be guaranteed. Periodic updates to this data package may occur, and it is the responsibility of Data Users to check for new versions. This data package is made available “as is” and comes with no warranty of accuracy or fitness for use. The creator(s) of this data package and the repository where these data were obtained shall not be liable for any damages resulting from misinterpretation, use, or misuse of these data. Finally, as a professional courtesy, we kindly request Data Users notify the primary contact referenced in the metadata when these data are used in the production of any derivative work or publication. Notification should include an explanation of how the data were used, along with a digital copy of the derived product(s). Thank you.
https://mcm.lternet.edu/content/lake-bonney-autonomous-lake-profiler-and-samplers-alps-conductivity-temperature-and-pressure 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): 10.1 162.269104003906 162.354934692383 -77.714805603027 -77.727287292480 57 57 meter 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): 54.7 162.353210449219 162.536209106445 -77.697700500488 -77.724441528320 57 57 meter 2013-12-01 2015-12-14 McMurdo Dry Valleys LTER http://mcmlter.org/ McMurdo Dry Valleys LTER http://mcmlter.org/ McMurdo Dry Valleys LTER
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 conductivity, temperature, dissolved oxygen, and pressure (Seabird model 41CP CTD endcaps). 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, conductivity, temperature, salinity and dissolved oxygen readings were recorded every 2 seconds. To convert the raw dissolved oxygen readings (recorded in sensor output units, hertz), manufacturer calibration coefficients and fit equations were used. 
LIMNO_ALPS_ENDCAP Details about the spreadsheet containing the Limnology ALPS endcap data, such as parameters definitions, units used, missing values and the likes. ALPS_WLB_endcap.csv 14221568 1 \r\n column , https://mcm.lternet.edu/sites/default/files/data/ALPS_WLB_endcap.csv DATASET_CODE DATASET_CODE DATASET_CODE string DATASET_CODE LOCATION_NAME LOCATION_NAME LOCATION_NAME string LOCATION_NAME LOCATION CODE LOCATION CODE LOCATION CODE, in this case, it is Bonw20 string LOCATION CODE, in this case, it is Bonw20 DATE_TIME DATE_TIME Date and time when this data point was collected date MM/DD/YYYY HH24:Mi:ss CONDUCTIVITY CONDUCTIVITY Conductivity of water at specific depth mmho/cm 1 real 4 900 TEMPERATURE TEMPERATURE Water Temperature at specific depth celsius 0.0001 real PRESSURE PRESSURE Pressure readings for current location of sensors decibar 0.01 real 0 45 DISSOLVED OXYGEN DISSOLVED OXYGEN Dissolved Oxygen Concentration at specific depth milligramsPerLiter .01 real 0 17 NA Out of range LIMNO_ALPS_ENDCAP_ELB Details about the spreadsheet containing the Limnology ALPS endcap data at East Bonney, such as parameters definitions, units used, missing values and the likes. ALPS_ELB_endcap.csv 18674746 1 \r\n column , https://mcm.lternet.edu/sites/default/files/data/ALPS_ELB_endcap.csv DATASET_CODE DATASET_CODE DATASET_CODE string DATASET_CODE LOCATION_NAME LOCATION_NAME LOCATION_NAME string LOCATION_NAME LOCATION CODE LOCATION CODE LOCATION CODE, in this case, it is Bonw20 string LOCATION CODE, in this case, it is Bonw20 DATE_TIME DATE_TIME Date and time when this data point was collected date MM/DD/YYYY HH24:Mi:ss CONDUCTIVITY CONDUCTIVITY Conductivity of water at specific depth mmho/cm 1 real 4 900 TEMPERATURE TEMPERATURE Water Temperature at specific depth celsius 0.0001 real PRESSURE PRESSURE Pressure readings for current location of sensors decibar 0.01 real 0 45 DISSOLVED OXYGEN DISSOLVED OXYGEN Dissolved Oxygen Concentration at specific depth milligramsPerLiter .01 real 0 17 NA Out of range
pressure