LIMNO_CTD

Description of the spreadsheet containing the CTD data -- units, definitions, columns and details about the data container.

File upload: 

LIMNO_CTD.csv (6.86 MB)

...or query the data clicking the:

Variables
DATASET_CODE
  • Label:
  • Definition: Code to identify the table - used by the data query system
  • Type: Nominal
  • Missing values: None specified
LIMNO_RUN
  • Label:
  • Definition: Code for lake's sampling location and date
  • Type: Nominal
  • Missing values: None specified
LOCATION NAME
  • Label: Location Name
  • Definition: Name of lake where measurement was made
  • Type: Nominal
  • Missing values: None specified
LOCATION CODE
  • Label: Location Code
  • Definition: Code for site where measurement was made, a database integrity constraint too
  • Type: Nominal
  • Missing values: None specified
DEPTH (m)
  • Label:
  • Definition: Depth (below the piezometric water level) derived from pressure using the Seabird software (d = p * 1.019716). Note: The upper 3-6 meters of each CTD cast, depending upon ice thickness for each lake, represents conditions within the ice melt hole and is not representative of actual lake water. It is advised that users of the data review the Lake Ice Thickness dataset in the MCM Database to find where the liquid water column starts for each cast.
  • Type: Physical quantity
  • Unit: meter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
CTD CONDUCTIVITY (mS/cm)
  • Label: CTD Conductivity (mS/cm)
  • Definition: Conductivity measured at lake depth
  • Type: Physical quantity
  • Unit: milliSiemensPerCentimeter (mS/cm)
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
CTD TEMP (C)
  • Label:
  • Definition: Temperature measured at lake depth
  • Type: Physical quantity
  • Unit: celsius
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
CTD COMMENTS
  • Label:
  • Definition: Helpful hints about the CTD measurements
  • Type: Nominal
  • Missing values: None specified
FILE_NAME
  • Label:
  • Definition: Name of file in which data was submitted
  • Type: Nominal
  • Missing values: None specified
DATE_TIME
  • Label:
  • Definition: Date on which sample was gathered
  • Type: Date/time
  • Date format: MM/DD/YYYY
  • Missing values: None specified
WIRE CORRECTED DEPTH (m)
  • Label:
  • Definition: CTD Depth (see DEPTH) corrected with lake specific equations based on the relationship between CTD measured depths, and depths measured by a calibrated winch cable. These corrections are necessary because of the high density of the bottom waters of East and West Lake Bonney, and the offset in the pressure sensor output compared to the winch measured depth at the surface of all lakes.
  • Type: Physical quantity
  • Unit: meter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
DEPTH MASL
  • Label:
  • Definition: Depth referred to the Sea level. Distance below Mean Average Sea water level reference from which sample was drawn
  • Type: Physical quantity
  • Unit: meter
  • Maximum: Not specified
  • Minimum: Not specified
  • Precision: Not specified
  • Missing values: None specified
Data Source Details

Header lines: 

1

Orientation: 

Column

Quote character: 

"

Field delimiter: 

,

Record delimiter: 

\n