Bathymetric Polynomials

Summary

Abstract:

As part of the Long Term Ecological Research in the McMurdo Dry Valleys of Antarctica, bathymetric data was collected for Lakes Hoare, Fryxell and Bonney. This table contains third order polynomial equations to fit the area vs. depth data of these lakes.

Date Range:

November 1, 1995 to November 30, 1995

Data Citation

Priscu, J.C. 2006. Bathymetric Polynomials. Environmental Data Initiative. DOI: 10.6073/pasta/e575611426ccea2d51f352a436caa9f1. Dataset accessed 17 April 2024.

Dataset(s)

Variables (click to expand):

Location Name

Label:
Definition: Name of lake where measurement was made
Type: Nominal
Missing values: None specified

Polynomial

Label:
Definition: third order polynomial equation to fit area vs. depth data
Type: Nominal
Missing values: None specified

Label: r^2
Definition: r squared value
Type: Physical quantity
Unit: r^2
Maximum: Not specified
Minimum: Not specified
Precision: Not specified
Missing values:
- Null = None given

Comments

Label:
Definition: Helpful hints
Type: Nominal
Missing values: None specified

File:

bthpoly.csv (1.28 KB)

Dataset ID:

People

Principal Investigator(s):

John C. Priscu

Contact:

McMurdo Dry Valleys LTER

Associated Personnel:

Associated Researcher

Data Manager

Methodology

Methods:

Data was collected by Jeffrey Schmok in November 1995 in order to prepare the Golder report on the bathymetry of Lakes Hoare, Fryxell, and Bonney. A 0.0 m contour is based on a shoreline survey of the frozen moat, and therefore is closer to piezometric water level than to top surface of floating permanent ice. Deeper contours are based on piezometric water level. Thus volume calculations within the ice cover represent volumes of liquid water as if the ice was melted.

Third order polynomial equations were fit to the area vs. depth data both from Schmok's report and from the digitized map data, using SigmaPlot's curve fitting routine. However, since the contour data are already a "best-fit" of measured depth data, and contour intervals are relatively small, it was decided to linearly interpolate the depth:area relationships for depths between the measured depth contours, at 0.5m intervals. Volume was calculated for each 0.5m increment as a truncated cone

(V=(h/3)*(A1+A2+sqrt(A1*A2)).

Maintenance:

adds metadata in 2016 - san gil

Additional information:

Data contained in these files has been subjected to quality control standards imposed by the investigator. The user of this data should be aware that, while efforts have been taken to ensure that these data are of the highest quality, there is no guarantee of perfection for the data contained herein and the possibility of errors exists. If you encounter questionable data, please contact the MCM LTER data manager corrected or qualified.Thus, these data may be modified and future data will be appended.

Research Section:

MCM Keywords:

Keywords:

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