BCO-DMO ERDDAP
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Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL access_formats String .htmlTable,.csv,.json,.mat,.nc,.tsv
attribute NC_GLOBAL acquisition_description String Lake Bathymetry Mapping\n \nThe bathymetry of the lakes was recorded with a purpose-built lightweight,\nlow-power echosounder unit with integrated GPS and AHRS (attitude and heading\nreference system), towed behind a kayak. (Data courtesy of Herwig Stibor,\nThomas Stieglitz.)\n \nLake Bathymetry Analysis\n \nRaw bathymetry data were down-sampled to include one sample every 2\\u00a0m\ndistance along the survey track. Data were visually inspected and false\nsoundings removed. In some lakes, GPS reception was partially compromised\nalong the steep shorelines. Where required to not compromise data density, the\nsurvey track was reconstructed from field notes and AHRS data (less than 5% of\ndata where applicable). During the bathymetry surveys, tidal water level was\nnot recorded. Therefore, tidal water level variations were corrected for by\nmodeling tidal water level in each lake. The water level for each lake was\ncorrelated with tidal water level measured at a reference station at CRRF or\npredicted tide (x-tide database), by determining tidal lag time and tidal\nefficiency (see below) from data previously collected concurrently in the\nrespective lake and at this reference station. Subsequently, bathymetry data\nwas reduced to a grid with 2m resolution by kriging of a further down-sampled\nsubset of data using every third data point. Lake-specific variograms were\napplied, and contour lines and total lake volumes were calculated in a GIS.\n(Data courtesy of Thomas Stieglitz.)\n \nDistance from lake to ocean & lake surface area\n \nLake shorelines and island coastlines were manually extracted from satellite\ndata (Microsoft Bing). The nearest, mean and median distance of each lake to\nthe respective island\\u2019s coastline as well as lake surface area was\ncalculated in a GIS. The perimeter was measured in meters using the\n\\u2018Measure Line\\u2019 tool in QGIS 3.4.\n \nHabitable surface area for benthic organisms was estimated either as (1) a\nmultiple of the perimeter and depth of the chemocline, i.e. assuming a\ncylindrical model for the lake, or (2) as the area of a frustum, i.e. a\ntruncated cone, using the perimeter of the lake at the surface, the average\nlength of transects, and the average angle of the transect from the vertical\n(estimated using the sine of maximum depth / transect length).\n \nTidal lag time and tidal efficiency were calculated from concurrently measured\ntidal water level in a lake and the adjacent ocean. The tidal lag time \\u2014\nthe time between high tide in the adjacent ocean and high tide in the lake\n\\u2014 was determined by least-square fit between lake and ocean tide measured\nusing HOBO 30-foot depth Titanium water level data loggers (Part #\nU20-001-01-Ti).\\u00a0 Tidal efficiency was calculated as the ratio between\namplitude of ocean tide and lake tide (e.g. Ayers, JF and Vacher, HL,\n1986.\\u00a0 Hydrogeology of an Atoll Island: A Conceptual Model from a\nDetailed Study of a Micronesian Example. Groundwater 24(2) 185-198.). Larger\ntidal lag time and smaller tidal efficiency respectively indicate a less\nefficient hydrological connection between ocean and lake.\n \nError-checking: Estimates of basic dimensions (depth, distance, length,\nsurface area) were double-checked manually for a subset of measurements by a\nsecond person using using Google Earth.\\u00a0
attribute NC_GLOBAL awards_0_award_nid String 55103
attribute NC_GLOBAL awards_0_award_number String OCE-1241255
attribute NC_GLOBAL awards_0_data_url String http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1241255 (external link)
attribute NC_GLOBAL awards_0_funder_name String NSF Division of Ocean Sciences
attribute NC_GLOBAL awards_0_funding_acronym String NSF OCE
attribute NC_GLOBAL awards_0_funding_source_nid String 355
attribute NC_GLOBAL awards_0_program_manager String David L. Garrison
attribute NC_GLOBAL awards_0_program_manager_nid String 50534
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL comment String Lake physical \n   Palau marine lake physical descriptions \n   M. Dawson (UC-Merced) \n   version date: 2019-05-13
attribute NC_GLOBAL Conventions String COARDS, CF-1.6, ACDD-1.3
attribute NC_GLOBAL creator_email String info at bco-dmo.org
attribute NC_GLOBAL creator_name String BCO-DMO
attribute NC_GLOBAL creator_type String institution
attribute NC_GLOBAL creator_url String https://www.bco-dmo.org/ (external link)
attribute NC_GLOBAL data_source String extract_data_as_tsv version 2.3  19 Dec 2019
attribute NC_GLOBAL date_created String 2019-05-16T12:47:21Z
attribute NC_GLOBAL date_modified String 2019-07-08T12:59:48Z
attribute NC_GLOBAL defaultDataQuery String &time<now
attribute NC_GLOBAL doi String 10.1575/1912/bco-dmo.768110.1
attribute NC_GLOBAL geospatial_vertical_max double 22.56
attribute NC_GLOBAL geospatial_vertical_min double 0.91
attribute NC_GLOBAL geospatial_vertical_positive String down
attribute NC_GLOBAL geospatial_vertical_units String m
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/768110 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL instruments_0_dataset_instrument_description String Used to determine tidal lag time, the time between high tide in the adjacent ocean and high tide in the lake.
attribute NC_GLOBAL instruments_0_dataset_instrument_nid String 768137
attribute NC_GLOBAL instruments_0_description String Electronic devices that record data over time or in relation to location either with a built-in instrument or sensor or via external instruments and sensors.
attribute NC_GLOBAL instruments_0_instrument_name String Data Logger
attribute NC_GLOBAL instruments_0_instrument_nid String 731353
attribute NC_GLOBAL instruments_0_supplied_name String HOBO 30-foot depth Titanium water level data loggers (Part # U20-001-01-Ti)
attribute NC_GLOBAL keywords String actual, area, bco, bco-dmo, biological, chemical, code, cylinder, data, dataset, depth, distance, distance_to_ocean_mean_m, distance_to_ocean_median_m, distance_to_ocean_min_m, dmo, efficiency, erddap, frustum, habitable, habitable_surface_area_cylinder, habitable_surface_area_frustum, lag, lake, lake_code, length, management, max, max_actual_depth_m, mean, mean_transect_length_m, median, min, minutes, ocean, oceanography, office, perimeter, perimeter_m, preliminary, stratified, surface, surface_area_m2, tidal, tidal_efficiency, tidal_lag_time_minutes, time, transect, volume, volume_m3
attribute NC_GLOBAL license String https://www.bco-dmo.org/dataset/768110/license (external link)
attribute NC_GLOBAL metadata_source String https://www.bco-dmo.org/api/dataset/768110 (external link)
attribute NC_GLOBAL param_mapping String {'768110': {'max_actual_depth_m': 'master - depth'}}
attribute NC_GLOBAL parameter_source String https://www.bco-dmo.org/mapserver/dataset/768110/parameters (external link)
attribute NC_GLOBAL people_0_affiliation String University of California-Merced
attribute NC_GLOBAL people_0_affiliation_acronym String UC Merced
attribute NC_GLOBAL people_0_person_name String Michael N Dawson
attribute NC_GLOBAL people_0_person_nid String 51577
attribute NC_GLOBAL people_0_role String Principal Investigator
attribute NC_GLOBAL people_0_role_type String originator
attribute NC_GLOBAL people_1_affiliation String Woods Hole Oceanographic Institution
attribute NC_GLOBAL people_1_affiliation_acronym String WHOI BCO-DMO
attribute NC_GLOBAL people_1_person_name String Nancy Copley
attribute NC_GLOBAL people_1_person_nid String 50396
attribute NC_GLOBAL people_1_role String BCO-DMO Data Manager
attribute NC_GLOBAL people_1_role_type String related
attribute NC_GLOBAL project String PaPaPro
attribute NC_GLOBAL projects_0_acronym String PaPaPro
attribute NC_GLOBAL projects_0_description String This project will survey the taxonomic, genetic, and functional diversity of the organisms found in marine lakes, and investigate the processes that cause gains and losses in this biodiversity. Marine lakes formed as melting ice sheets raised sea level after the last glacial maximum and flooded hundreds of inland valleys around the world. Inoculated with marine life from the surrounding sea and then isolated to varying degrees for the next 6,000 to 15,000 years, these marine lakes provide multiple, independent examples of how environments and interactions between species can drive extinction and speciation. Researchers will survey the microbes, algae, invertebrates, and fishes present in 40 marine lakes in Palau and Papua, and study how diversity has changed over time by retrieving the remains of organisms preserved in sediments on the lake bottoms. The project will test whether the number of species, the diversity of functional roles played by organisms, and the genetic diversity within species increase and decrease in parallel; whether certain species can greatly curtail diversity by changing the environment; whether the size of a lake determines its biodiversity; and whether the processes that control diversity in marine organisms are similar to those that operate on land.\nBecause biodiversity underlies the ecosystem services on which society depends, society has a great interest in understanding the processes that generate and retain biodiversity in nature. This project will also help conserve areas of economic importance. Marine lakes in the study region are important for tourism, and researchers will work closely with governmental and non-governmental conservation and education groups and with diving and tourism businesses to raise awareness of the value and threats to marine lakes in Indonesia and Palau.
attribute NC_GLOBAL projects_0_end_date String 2017-12
attribute NC_GLOBAL projects_0_geolocation String Western Pacific; Palau; Indonesia (West Papua)
attribute NC_GLOBAL projects_0_name String Do Parallel Patterns Arise from Parallel Processes?
attribute NC_GLOBAL projects_0_project_nid String 2238
attribute NC_GLOBAL projects_0_project_website String http://marinelakes.ucmerced.edu/ (external link)
attribute NC_GLOBAL projects_0_start_date String 2013-01
attribute NC_GLOBAL publisher_name String Biological and Chemical Oceanographic Data Management Office (BCO-DMO)
attribute NC_GLOBAL publisher_type String institution
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL standard_name_vocabulary String CF Standard Name Table v55
attribute NC_GLOBAL summary String Physical description of marine lakes including surface area, distance to ocean, tidal efficiency, depth, and stratification.
attribute NC_GLOBAL title String [Palau lakes physical description] - Physical description of marine lakes: surface area, distance to ocean, tidal efficiency, depth, and stratification (Do Parallel Patterns Arise from Parallel Processes?)
attribute NC_GLOBAL version String 1
attribute NC_GLOBAL xml_source String osprey2erddap.update_xml() v1.3
variable lake String
attribute lake bcodmo_name String site
attribute lake description String common name for lake
attribute lake long_name String Lake
attribute lake units String unitless
variable lake_code String
attribute lake_code bcodmo_name String site
attribute lake_code description String 3-letter code for sampled lake name
attribute lake_code long_name String Lake Code
attribute lake_code units String unitless
variable volume_m3 int
attribute volume_m3 _FillValue int 2147483647
attribute volume_m3 actual_range int 12038, 1458890
attribute volume_m3 bcodmo_name String volume
attribute volume_m3 description String estimated volume of the lake (m3)
attribute volume_m3 long_name String Volume M3
attribute volume_m3 units String meters^3
variable surface_area_m2 int
attribute surface_area_m2 _FillValue int 2147483647
attribute surface_area_m2 actual_range int 980, 79636
attribute surface_area_m2 bcodmo_name String surface_area
attribute surface_area_m2 description String Surface area of the lake  (m2).
attribute surface_area_m2 long_name String Surface Area M2
attribute surface_area_m2 units String meters^2
variable distance_to_ocean_min_m short
attribute distance_to_ocean_min_m _FillValue short 32767
attribute distance_to_ocean_min_m actual_range short 24, 501
attribute distance_to_ocean_min_m bcodmo_name String unknown
attribute distance_to_ocean_min_m description String Minimum distance from a lake’s edge to the surrounding lagoon (m)
attribute distance_to_ocean_min_m long_name String Distance To Ocean Min M
attribute distance_to_ocean_min_m units String meters
variable distance_to_ocean_mean_m short
attribute distance_to_ocean_mean_m _FillValue short 32767
attribute distance_to_ocean_mean_m actual_range short 48, 542
attribute distance_to_ocean_mean_m bcodmo_name String unknown
attribute distance_to_ocean_mean_m description String Mean distance from a lake’s edge to the surrounding lagoon (m).
attribute distance_to_ocean_mean_m long_name String Distance To Ocean Mean M
attribute distance_to_ocean_mean_m units String meters
variable distance_to_ocean_median_m short
attribute distance_to_ocean_median_m _FillValue short 32767
attribute distance_to_ocean_median_m actual_range short 52, 540
attribute distance_to_ocean_median_m bcodmo_name String unknown
attribute distance_to_ocean_median_m description String Median distance from a lake’s edge to the surrounding lagoon (m).
attribute distance_to_ocean_median_m long_name String Distance To Ocean Median M
attribute distance_to_ocean_median_m units String meters
variable tidal_lag_time_minutes short
attribute tidal_lag_time_minutes _FillValue short 32767
attribute tidal_lag_time_minutes actual_range short 0, 190
attribute tidal_lag_time_minutes bcodmo_name String unknown
attribute tidal_lag_time_minutes description String the time between high tide in the adjacent ocean and high tide in the lake
attribute tidal_lag_time_minutes long_name String Tidal Lag Time Minutes
attribute tidal_lag_time_minutes units String minutes
variable tidal_efficiency float
attribute tidal_efficiency _FillValue float NaN
attribute tidal_efficiency actual_range float 0.17, 0.99
attribute tidal_efficiency bcodmo_name String unknown
attribute tidal_efficiency description String the ratio between amplitude of ocean tide and lake tide.
attribute tidal_efficiency long_name String Tidal Efficiency
attribute tidal_efficiency units String unitless
variable mean_transect_length_m double
attribute mean_transect_length_m _FillValue double NaN
attribute mean_transect_length_m actual_range double 1.167925, 49.855
attribute mean_transect_length_m bcodmo_name String len_track
attribute mean_transect_length_m description String average of distance_trans for the lake from https://www.bco-dmo.org/dataset/541181
attribute mean_transect_length_m long_name String Mean Transect Length M
attribute mean_transect_length_m units String meters
variable depth double
attribute depth _CoordinateAxisType String Height
attribute depth _CoordinateZisPositive String down
attribute depth _FillValue double NaN
attribute depth actual_range double 0.91, 22.56
attribute depth axis String Z
attribute depth bcodmo_name String depth
attribute depth description String maximum depth_m for the lake from https://www.bco-dmo.org/dataset/541181
attribute depth ioos_category String Location
attribute depth long_name String Max Actual Depth M
attribute depth nerc_identifier String https://vocab.nerc.ac.uk/collection/P09/current/DEPH/ (external link)
attribute depth positive String down
attribute depth standard_name String depth
attribute depth units String m
variable perimeter_m double
attribute perimeter_m _FillValue double NaN
attribute perimeter_m actual_range double 118.6785825, 1898.121669
attribute perimeter_m bcodmo_name String unknown
attribute perimeter_m description String circumference of lake (m).
attribute perimeter_m long_name String Perimeter M
attribute perimeter_m units String meters
variable habitable_surface_area_cylinder double
attribute habitable_surface_area_cylinder _FillValue double NaN
attribute habitable_surface_area_cylinder actual_range double 352.2554619, 68121.25011
attribute habitable_surface_area_cylinder bcodmo_name String surface_area
attribute habitable_surface_area_cylinder description String An estimate of the area of the benthic zone above the chemocline; based on the model of lake shape as a cylinder.
attribute habitable_surface_area_cylinder long_name String Habitable Surface Area Cylinder
attribute habitable_surface_area_cylinder units String meters^2
variable habitable_surface_area_frustum double
attribute habitable_surface_area_frustum _FillValue double NaN
attribute habitable_surface_area_frustum actual_range double 316.1651968, 61157.96127
attribute habitable_surface_area_frustum bcodmo_name String surface_area
attribute habitable_surface_area_frustum description String An estimate of the area of the benthic zone above the chemocline; based on the model of lake shape as a truncated cone.
attribute habitable_surface_area_frustum long_name String Habitable Surface Area Frustum
attribute habitable_surface_area_frustum units String meters^2
variable stratified byte
attribute stratified _FillValue byte 127
attribute stratified actual_range byte 0, 1
attribute stratified bcodmo_name String unknown
attribute stratified description String whether a lake is vertically stratified (1) or holomictic (0)
attribute stratified long_name String Stratified
attribute stratified units String unitless

 
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