[Personnel: Last_Name='RITZ', Middle_Name='A.', First_Name='SCOTT']
Climatology, Meteorology, and Microbial Metabolism in Ice with Dust Loggers and FluorimetryEntry ID: price_0738658
Abstract: This award supports a project to use two new scanning fluorimeters to map microbial concentrations vs depth in the WAIS Divide ice core as portions of it become available at NICL, and selected portions of the GISP2 ice core for inter-hemispheric comparison. Ground-truth calibrations with microbes in ice show that the instruments are sensitive to a single cell and can scan the full length of a 1-meter core at 300-micron intervals in two minutes.
This research is supported, in part, by the National Science Foundation's (NSF) Office of Polar Programs (OPP) Division of Antarctic Science: Glaciology Program.
Purpose: The goals of these studies will be to exploit the discovery that microbes are transported onto ice, in clumps, several times per year and that at rare intervals (not periodically) of ~10^4 years, a much higher flux, sometimes lasting &amp;amp;amp;amp;amp;amp;gt;1 decade, reaches the ice. From variations ranging from seasonal to millennial to glacial scale in the arrival time distribution ... of phototrophs, methanogens, and total microbes in the Antarctic and Arctic ice, the investigators will attempt to determine oceanic and terrestrial sources of these microbes and will look for correlations of microbial bursts with dust concentration and temperature proxies. In addition the project will follow up on the discovery that the rare instances of very high microbial flux account for some of the"gas artifacts" in ice cores - isolated spikes of excess CH4 and N2O that have been discarded by others in previous climate studies. With the one-year no-cost extension that was granted, Ryan Bay was able to obtain a high-resolution dust log of the entire WAIS Divide borehole to 3329.8 m, which yielded an approximate age of 62,000 years.
ISO Topic Category
Data Set Progress
Email: bprice at berkeley.edu
Physics Department University of California
Province or State: CA
Postal Code: 94720
Role: TECHNICAL CONTACT
Email: jmsouney at gust.sr.unh.edu
Institute for the Study of Earth and Ocean Sciences University of New Hampshire
Province or State: NH
Postal Code: 03264
P. B. Price. "Microbial life in glacial ice and implications for a cold origin of life," FEMS Microbiology and Ecology, v.59, 2007, p. 217.
P. B. Price. "Microbial life in Martian ice: a biotic origin of methane on Mars," Planetary and Space Science, v.58, 2010, p. 1199.
P. B. Price. "Recent applications of nuclear tracks in solids," Radiation Measurements, v.43, 2008, p. 1177.
Price, P. B.. ... "Microbial genesis, life and death in glacial ice," Canadian Journal of Microbiology, v.55, 2009, p. 1.
Price, P. B., Rohde, R. A., and Bay, R. C.. "Fluxes of microbes, organic aerosols, dust, sea-salt Na ions, non-sea-salt Ca ions, and methanesulfonate onto Greenland and Antarctic ice," Biogeosciences, v.6, 2009, p. 479.
R. A. Rohde. "Development and use of the Berkeley Fluorescence Spectrometer to characterize microbial content and detect volcanic ash in glacial ice," Ph. D. thesis, University of California, Berkeley, 2009.
R. A. Rohde and P. B. Price. "Diffusion-controlled metabolism for long-term survival of single isolated microorganisms trapped within ice crystals.," Proc. Natl. Acad. Sci. USA, v.104, 2007, p. 16592.
R. Abbasi et al.. "Measurement of acoustic attenuation in South Pole ice," Astroparticle Physics, v.34, 2011, p. 382.
R. Abbasi et al.. "Measurement of sound speed vs. depth in South Pole ice," Astroparticle Physics, v.33, 2010, p. 277.
R. C. Bay, R. A. Rohde, P. B. Price, and N. E. Bramall. "South Pole paleowind from automated sythesis of ice core records.," j. geophys. Res., v.115, 2010, p. D14126.
Rohde, R. A., Price, P. B., Bay, R. C., and Bramall, N. E.. "In situ microbial metabolism as a cause of gas anomalies in ice," Proceedings of the National Academy of Sciences of the USA, v.105, 2008, p. 8667.
S. K. Atreya, O. Witasse, V. F. Chevrier, F. Forget, P. R. Mahaffy, P. B. Price, C. R. Webster, and R. W. Zurek. Plan. Space. Sci. 59, 133-136 (2011).. "Methane on Mars: current observations, interpretation, and future plans," Planetary and Space Science, v.59, 2011, p. 1199.
Creation and Review Dates
DIF Creation Date: 2012-06-19
Last DIF Revision Date: 2012-06-29