LIMNO_BLUE_BOX_STATS English utf8 dataset McMurdo Dry Valleys LTER Information Manager im@mcmlter.org pointOfContact 2016-03-18 ISO 19115-2 Geographic Information - North American Profile Metadata - Data with Biological Extensions ISO 19115-2:2009(E) Daily measurement summaries from lake-based "Blue Box" monitoring stations in the McMurdo Dry Valleys, Antarctica (1994-2019, ongoing) 2016-03-18 publication Peter Doran Louisiana State University http://lsu.edu pdoran@lsu.edu https://www.lsu.edu/science/geology/people/faculty/doran.php pointOfContact documentDigital As part of the McMurdo Dry Valleys Long Term Ecological Research program, continuous stage (lake level), ice surface ablation, surface PAR, and underwater PAR are collected at various lakes throughout the McMurdo Dry Valleys of Antarctica. This package contains daily measurement summaries derived from high frequency data for Lake Fryxell, Lake Hoare, East Lake Bonney, and West Lake Bonney in Taylor Valley as well as Lake Miers in Miers Valley. MCM sometimes refers to these measurements as "blue box" data because the instrumentation used to be housed in a blue box. Name: Krista F. Myers Role: field technician Name: Renée F. Brown Role: data manager Name: Maciej K. Obryk Role: former field crew Name: Hilary A. Dugan Role: former field crew Name: Kyle Cronin Role: former field crew Name: Chris Gardner Role: former data manager Name: Inigo San Gil Role: former data manager completed McMurdo Dry Valleys LTER Information Manager im@mcmlter.org pointOfContact unknown in April 2016, after a revision of the Blue Box data, Peter Doran, John Priscu and Maciek Obryk concluded that West Lake Bonney Underwater PAR (Photosynthetic Active Radiation) data between 8-Jul-2008 and 12-Nov-2012 is questionable and likely inaccurate. Therefore, the UW_PAR data for West Lake Bonney and above date range has been replaced with blanks. Subsequent data derivatives and data snapshots have been updated accordingly English The Lake Fryxell basin is formed by a moraine depression in a wider portion of the Taylor Valley. It has a number of moraine islands and shallower areas, as well as several relatively well developed deltas. The lake is fed by at least 10 meltwater streams with a total drainage catchment of 230 km2. The lake is dammed to the southwest by the Canada Glacier and is topographically closed. It is perennially ice covered; during summer months, an ice-free moat generally forms around much of the lake margin. Lake levels have risen ~2 m between 1971 and 1996. There are no surface outflows; the only known water loss is through ice ablation (evaporation, sublimation and physical scouring). Valley: Taylor Distance to Sea : 9 Maximum Length (km): 5.8 Maximum Width (km): 2.1 Maximum Depth (m): 20 Surface Area (km^2): 7.08 Ice Thickness Average Surface (m): 3.3 - 4.5 Volume (m^3 * 10^6): 25.2 163.259582519531 163.048782348633 -77.622711181641 -77.597076416016 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 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 Hoare occupies a narrower portion of the Taylor Valley, dammed by the Canada Glacier. It would drain almost completely without this dam. There are a number of islands which may be related to an old terminal of Canada Glacier. The lake is fed primarily from direct runoff from the glacier, as well as meltwater streams. (Lake level rose ~1.5 m between 1972 and 1996). There are no surface outflows; the only known water loss is through ice ablation (evaporation, sublimation and physical scouring). Valley: Taylor Distance to Sea : 15 Maximum Length (km): 4.2 Maximum Width (km): 1 Maximum Depth (m): 34 Surface Area (km^2): 1.94 Ice Thickness Average Surface (m): 3.1 - 5.5 Volume (m^3 * 10^6): 17.5 162.935836791992 162.784423828125 -77.639259338379 -77.623085021973 Lake Miers lies in the Miers Valley. Valley: Miers Distance to Sea : 20 Maximum Length (km): 1.5 Maximum Width (km): 0.7 Maximum Depth (m): 21 Surface Area (km^2): 1.3 Ice Thickness Average Surface (m): 3.4 - 6 Volume (m^3 * 10^6): 2.9 163.886840820313 163.812332153320 -78.101478576660 -78.094047546387 ground condition 1994-12-05 2019-06-30 Log files (changes made to the blue box dataset) and detailed diagrams of the blue box sensor, loggers and experiment deployment, plus sensor specifications and some operationational paramenters can be found in the Blue Box Bible. Data and metadata were moved into DEIMS on 2014. In 2016, Data package was readied for LTER NIS. San Gil https://mcm.lternet.edu/sites/default/files/data/LIMNO_BB_DAILY_FRYXELL.csv LIMNO_BB_DAILY_FRYXELL eng; US McMurdo Dry Valleys LTER LIMNO_BB_DAILY_FRYXELL Data Source Definition : Lake Fryxell Blue Box Daily Summaries Record Delimiter : \n Number of Header Lines : 1 Number of Footer Lines : 1 Orientation : Column Quote Character : "Field Delimiter : , false LOCATION NAME Lake name DATE_TIME Date Date Time Format: MM/DD/YYYY AVG_STAGE Daily average lake level measured continuously by a presser transducer fixed to a line an anchor and buoy. STDDEV_STAGE Daily standard deviation of lake level measured continuously by a presser transducer fixed to a line an anchor and buoy. MIN_STAGE Daily minimum lake level measured continuously by a presser transducer fixed to a line an anchor and buoy. MAX_STAGE Daily maximum lake level measured continuously by a presser transducer fixed to a line an anchor and buoy. N_STAGE Number of stage measurements used to calculate daily stats. AVG_SURFACE_PAR Daily average daily photon flux on the ice surface from all directions. STDDEV_SURFACE_PAR Daily standard deviation of daily photon flux on the ice surface from all directions. MIN_SURFACE_PAR Minimum daily photon flux on the ice surface from all directions. MAX_SURFACE_PAR Maximum daily photon flux on the ice surface from all directions. N_SURFACE_PAR Number of measurements used to calculate daily stats. AVG_UW_PAR Daily average photon flux under the ice surface from all directions. STDDEV_UW_PAR Daily standard deviation of photon flux under the ice surface from all directions. MIN_UW_PAR Minimum daily photon flux under the ice surface from all directions. MAX_UW_PAR Maximum daily photon flux under the ice surface from all directions. N_UW_PAR Number of measurements used to calculate daily stats. DAILY_ABLATION Average continuous lake level ice ablation measurement using a pressure transducer suspended by its cable through the ice. DBF https://mcm.lternet.edu/sites/default/files/data/LIMNO_BB_DAILY_FRYXELL.csv https://mcm.lternet.edu/sites/default/files/data/LIMNO_BB_DAILY_HOARE.csv LIMNO_BB_DAILY_HOARE eng; US McMurdo Dry Valleys LTER LIMNO_BB_DAILY_HOARE Data Source Definition : Lake Hoare Blue Box Daily Summaries Record Delimiter : \n Number of Header Lines : 1 Number of Footer Lines : 1 Orientation : Column Quote Character : "Field Delimiter : , false LOCATION NAME Lake name DATE_TIME Date Date Time Format: MM/DD/YYYY AVG_STAGE Daily average lake level measured continuously by a presser transducer fixed to a line an anchor and buoy. STDDEV_STAGE Daily standard deviation of lake level measured continuously by a presser transducer fixed to a line an anchor and buoy. MIN_STAGE Daily minimum lake level measured continuously by a presser transducer fixed to a line an anchor and buoy. MAX_STAGE Daily maximum lake level measured continuously by a presser transducer fixed to a line an anchor and buoy. N_STAGE Number of stage measurements used to calculate daily stats. AVG_SURFACE_PAR Daily average daily photon flux on the ice surface from all directions. STDDEV_SURFACE_PAR Daily standard deviation of daily photon flux on the ice surface from all directions. MIN_SURFACE_PAR Minimum daily photon flux on the ice surface from all directions. MAX_SURFACE_PAR Maximum daily photon flux on the ice surface from all directions. N_SURFACE_PAR Number of measurements used to calculate daily stats. AVG_UW_PAR Daily average photon flux under the ice surface from all directions. STDDEV_UW_PAR Daily standard deviation of photon flux under the ice surface from all directions. MIN_UW_PAR Minimum daily photon flux under the ice surface from all directions. MAX_UW_PAR Maximum daily photon flux under the ice surface from all directions. N_UW_PAR Number of measurements used to calculate daily stats. DAILY_ABLATION Average continuous lake level ice ablation measurement using a pressure transducer suspended by its cable through the ice. DBF https://mcm.lternet.edu/sites/default/files/data/LIMNO_BB_DAILY_HOARE.csv https://mcm.lternet.edu/sites/default/files/data/LIMNO_BB_DAILY_ELBONNEY_0.csv LIMNO_BB_DAILY_ELBONNEY eng; US McMurdo Dry Valleys LTER LIMNO_BB_DAILY_ELBONNEY Data Source Definition : East Lake Bonney Blue Box Daily Summaries Record Delimiter : \n Number of Header Lines : 1 Number of Footer Lines : 0 Orientation : Column Quote Character : "Field Delimiter : , false LOCATION NAME Lake name DATE_TIME Date Date Time Format: MM/DD/YYYY AVG_STAGE Daily average lake level measured continuously by a presser transducer fixed to a line an anchor and buoy. STDDEV_STAGE Daily standard deviation of lake level measured continuously by a presser transducer fixed to a line an anchor and buoy. MIN_STAGE Daily minimum lake level measured continuously by a presser transducer fixed to a line an anchor and buoy. MAX_STAGE Daily maximum lake level measured continuously by a presser transducer fixed to a line an anchor and buoy. N_STAGE Number of stage measurements used to calculate daily stats. AVG_SURFACE_PAR Daily average daily photon flux on the ice surface from all directions. STDDEV_SURFACE_PAR Daily standard deviation of daily photon flux on the ice surface from all directions. MIN_SURFACE_PAR Minimum daily photon flux on the ice surface from all directions. MAX_SURFACE_PAR Maximum daily photon flux on the ice surface from all directions. N_SURFACE_PAR Number of measurements used to calculate daily stats. AVG_UW_PAR Daily average photon flux under the ice surface from all directions. STDDEV_UW_PAR Daily standard deviation of photon flux under the ice surface from all directions. MIN_UW_PAR Minimum daily photon flux under the ice surface from all directions. MAX_UW_PAR Maximum daily photon flux under the ice surface from all directions. N_UW_PAR Number of measurements used to calculate daily stats. DAILY_ABLATION Average continuous lake level ice ablation measurement using a pressure transducer suspended by its cable through the ice. DBF https://mcm.lternet.edu/sites/default/files/data/LIMNO_BB_DAILY_ELBONNEY_0.csv https://mcm.lternet.edu/sites/default/files/data/LIMNO_BB_DAILY_WLBONNEY_0.csv LIMNO_BB_DAILY_WLBONNEY eng; US McMurdo Dry Valleys LTER LIMNO_BB_DAILY_WLBONNEY Data Source Definition : West Lake Bonney Blue Box Daily Summaries Record Delimiter : \n Number of Header Lines : 1 Number of Footer Lines : 0 Orientation : Column Quote Character : "Field Delimiter : , false LOCATION NAME Lake name DATE_TIME Date Date Time Format: MM/DD/YYYY AVG_STAGE Daily average lake level measured continuously by a presser transducer fixed to a line an anchor and buoy. STDDEV_STAGE Daily standard deviation of lake level measured continuously by a presser transducer fixed to a line an anchor and buoy. MIN_STAGE Daily minimum lake level measured continuously by a presser transducer fixed to a line an anchor and buoy. MAX_STAGE Daily maximum lake level measured continuously by a presser transducer fixed to a line an anchor and buoy. N_STAGE Number of stage measurements used to calculate daily stats. AVG_SURFACE_PAR Daily average daily photon flux on the ice surface from all directions. STDDEV_SURFACE_PAR Daily standard deviation of daily photon flux on the ice surface from all directions. MIN_SURFACE_PAR Minimum daily photon flux on the ice surface from all directions. MAX_SURFACE_PAR Maximum daily photon flux on the ice surface from all directions. N_SURFACE_PAR Number of measurements used to calculate daily stats. AVG_UW_PAR Daily average photon flux under the ice surface from all directions. STDDEV_UW_PAR Daily standard deviation of photon flux under the ice surface from all directions. MIN_UW_PAR Minimum daily photon flux under the ice surface from all directions. MAX_UW_PAR Maximum daily photon flux under the ice surface from all directions. N_UW_PAR Number of measurements used to calculate daily stats. DAILY_ABLATION Average continuous lake level ice ablation measurement using a pressure transducer suspended by its cable through the ice. DBF https://mcm.lternet.edu/sites/default/files/data/LIMNO_BB_DAILY_WLBONNEY_0.csv https://mcm.lternet.edu/sites/default/files/data/LIMNO_BB_DAILY_MIERS.csv LIMNO_BB_DAILY_MIERS eng; US McMurdo Dry Valleys LTER LIMNO_BB_DAILY_MIERS Data Source Definition : Lake Miers Blue Box Daily Summaries Record Delimiter : \n Number of Header Lines : 1 Number of Footer Lines : 1 Orientation : Column Quote Character : "Field Delimiter : , false LOCATION NAME Lake name DATE_TIME Date Date Time Format: MM/DD/YYYY AVG_STAGE Daily average lake level measured continuously by a presser transducer fixed to a line an anchor and buoy. STDDEV_STAGE Daily standard deviation of lake level measured continuously by a presser transducer fixed to a line an anchor and buoy. MIN_STAGE Daily minimum lake level measured continuously by a presser transducer fixed to a line an anchor and buoy. MAX_STAGE Daily maximum lake level measured continuously by a presser transducer fixed to a line an anchor and buoy. N_STAGE Number of stage measurements used to calculate daily stats. AVG_SURFACE_PAR Daily average daily photon flux on the ice surface from all directions. STDDEV_SURFACE_PAR Daily standard deviation of daily photon flux on the ice surface from all directions. MIN_SURFACE_PAR Minimum daily photon flux on the ice surface from all directions. MAX_SURFACE_PAR Maximum daily photon flux on the ice surface from all directions. N_SURFACE_PAR Number of measurements used to calculate daily stats. AVG_UW_PAR Daily average photon flux under the ice surface from all directions. STDDEV_UW_PAR Daily standard deviation of photon flux under the ice surface from all directions. MIN_UW_PAR Minimum daily photon flux under the ice surface from all directions. MAX_UW_PAR Maximum daily photon flux under the ice surface from all directions. N_UW_PAR Number of measurements used to calculate daily stats. DAILY_ABLATION Average continuous lake level ice ablation measurement using a pressure transducer suspended by its cable through the ice. DBF https://mcm.lternet.edu/sites/default/files/data/LIMNO_BB_DAILY_MIERS.csv dataset Details The details of all Blue Box methods can be found in the "Blue Box Bible". There is information about sensors, manuals of such sensors, field equipment diagram Field Setup changes (hardware changed at each lake), Software changes, and notes. The specific programs used are included for each lake. Sensors are attached to CR10X data logger. Sampling interval of measurements is 60 seconds. Every 20 minutes program calculates average and record it in the storage module. Data were downloaded every year by beginning of the season (October-November) and by the end of the season (January-February) and cleaned from error data. Please see in the general comments section for the details on sensors and field setup. Programs can be found in technical documentation aka Blue Box Bible this web site About the Log Files Log files (changes made to the blue box dataset) and detailed diagrams of the blue box sensor, loggers and experiment deployment, plus sensor specifications and some operational parameters can be found here. Notes on missing dataMissing data are mostly due to battery blackouts. Those points are represented as blanks in the database. if the blackout affects entire rows / dates, those may be missing. Metadata Access Constraints: none Metadata Use Constraints: none annually McMurdo Dry Valleys LTER http://mcmlter.org/ pointOfContact