Physical Properties

Lake level surveys in the McMurdo Dry Valleys, Antarctica from 1991 to present

Abstract: 

Manual lake level measurements are conducted for the lakes in the McMurdo Dry Valleys, Antarctica. The survey includes Lakes Fryxell, Hoare, Bonney, Vida, Vanda, Don Juan Pond, Miers, House, and Joyce.

Dataset ID: 

68

Associated Personnel: 

851
27
210
812
211

Short name: 

lakelevel

Data sources: 

LIMNO_LAKE_LEVELS

Methods: 

Manual lake level measurements are made with a survey rod, tripod, and autolevel. Generally one measurement is taken in the early austral summer (Oct/Nov), and a second measurement towards the middle/end of the austral summer (Jan/Feb). The MCM LTER has made an attempt to reference all of our observations to the historical (and published) record from the dry valleys. That means that while the values in meters above sea level are correct with respect to the old KIWI data, they will not match differential GPS measurements made without correcting to the KIWI datum. 
       
During MCM-I, new lake leveling benchmarks were established at the three main Taylor Valley camps for ease of measurement. Each of these new benchmarks was measured using differential GPS to a high degree of accuracy. To put lake levels in the context of the historical data, a similar GPS survey was carried out on old Kiwi benchmarks that have been used for leveling in the past, and an offset applied to the data collected from the new benchmarks.
      
See the following PDF file for photographs of the Dry Valleys Lake Level benchmarks: MCMLTER Benchmarks 20190829.pdf
      

Maintenance: 

Data and metadata was ported into DEIMS in 2015 by Inigo 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.

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