Second Antarctic Field Season: 2005-06
Project Links:
Media Coverage
2004-05 Field Season Report
2005-06 Field Season Report

Our second field season in Antarctica on this project began in November 2005. Our goals this season were to:
  • sample each of our 11 plots (7 on stream shores, 4 on lake shores) twice - early and late the season
  • perform synoptic sampling and GPS survey of the wetted zone around the East Lobe of Lake Bonney,
  • execute a conservative tracer experiment in lakeside sediments,
  • perfrom extensive evaporation pan experiments at any camp we occupied
  • maintain datalogging stations at Lakes Joyce, Bonney, and Fryxell, adding soil moisture sensors to the thermocouple strings already deployed,
  • sample stream-side sites for an LTER intersite comparison project, comparing riparian soil microbiological communities in hot (Sevilleta) and cold (Dry Valleys) deserts.
  • execute 15N tracer experiments in mesocosms, and
  • perform 15N tracer experiments in microcosms to develop and demonstrate a stable isotope probing technique.
panoramic image of the east shore of Lake Bonney
Panoramic view of the eastern end of Lake Bonney. Notice the variability in the wetted zone extents from the lake.
thermocouple strings and data logger at Lake Bonney
Datalogger and thermocouple strings at Lk Bonney.Note that the farthest string is underwater (as of 04Jan2006). Lk Bonney continued to rise throughout the austral summer, greatly modifying the position of our plot.

Study plots were re-visited and re-sampled at the following locations:
  • Lake Joyce, north shore
  • Lake Bonney, south shore
  • Lake Hoare, south shore
  • Lake Fryxell, north shore
  • Priscu Stream (E end of Lk. Bonney), above Bohner Stream tributary
  • Green Creek, west shore, below F9 stream gauge
  • Lower Delta Stream, just above F10 stream gauge
  • Upper Delta Stream
  • Lost Seal Stream (southern tributary, near Commonwealth Gl)
  • Upper Onyx River, ~400 m above LWRT stream gauge
  • Lower Onyx River, ~300 m above Bull Pond
Samples from all sites will be analyzed for biogeochemistry, water content, size fraction, water extracted will be analyzed for stable isotopes of deuterium and 18O, and molecular microbial analysis.

The samples taken during the circumnavigation of the east lobe of Lake Bonney will be used to determine water content and sediment size fraction. Combining this data with wetted zone dimensions and local topography, we will assess the landscape controls on wetted zone dynamics. We will analyze this data in conjunction with the same data collected from Lake Fryxell last year to determine the landscape scale controls on the variability in the extent of these wetted zones.

Second Season Activities:

Meet the Field Team:

Cristina, Lydia, and Mike B. arrived in Antarctica in late Nov.; Brad and Melissa arrived in Antarctica at the start of Dec.; Jeb and Mike arrived on Dec. 29.

M Gooseff
Dr. Michael Gooseff, Assistant Professor,
Colorado School of Mines
J. Barrett
Dr. Jeb Barrett, Adjunct Assistant Professor,
Dartmouth College
C. Vesbach
Dr. Cristina Vesbach
Assistant Professor,
University of New Mexico
D. B. Bate
D. Brad Bate, recent graduate of Dartmouth College
M. Bobb
Michael Bobb, MS student,
University of New Mexico

M. Northcott
Melissa Northcott, MS student, Colorado School of Mines
L. Zeglin
Lydia Zeglin, Ph.D. candidate,
University of New Mexico

We gratefully acknowledge the professional and efficient support of Raytheon Polar Services Company and PHI Helicopters, yet again. Without their assistance, we would not have been able to accomplish so much in the field.

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This page was updated on 17-Sept-2007.
This page was created on 17-Jan-2006.
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