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David Johnston
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- created an event in Harvard GeobiologyFriday, February 12, 2010 - 4:00pm at TBD
hi-
Here is the first paper up for discussion. It didnt pop up below, but is a paper by Goldblatt et al 2009 (including Claire and Zahnle) on climate and the Archean atmosphere.Login or register to post commentsNice to be here in your discussion group. Looking for something about the climate and atmosphere. This time the con was on Harvard. The Adam Wheeler Harvard scam is said to be one for the books. Adam Wheeler managed to fake enough paperwork to get into Harvard, one of the top Ivy League schools. Certain he was caught, but only following attempting to take his scam further! If he'd just remained in college and graduated, he might have never been caught. You have to wonder, if it had been so easy for Adam Wheeler to fake paperwork to get into one of the top U.S. schools, how many other individuals are in that school that did not ... more - anne Smith May 20, 2010 Comment deleted - created an event in Harvard GeobiologyLogin or register to post commentsFriday, November 6, 2009 - 4:00pm at HUCE seminar room
We will use these papers as a vehicle to discuss scales of observation
Micron-scale mapping of sulfur cycling across the oxycline of a cyanobacterial mat: a paired nanoSIMS and CARD-FISH approach. Fike DA (2008) ISME J.Deep-sea archaea fix and share nitrogen in methane-consuming microbial consortia. Dekas AE (2009) Science. - created an event in Harvard GeobiologyLogin or register to post commentsFriday, October 23, 2009 - 3:00pm at HUCE seminar room
We will have a short primer on the Nitrogen cycle and N-isotopes before Meytal's defense at 4pm
Denitrification as the dominant nitrogen loss process in the Arabian Sea. Ward BB (2009) Nature. - Login or register to post comments
Another paper of interest on biomarkers
Rapid resurgence of marine productivity after the Cretaceous-Paleogene mass extinction. Sepúlveda J (2009) Science. - Login or register to post comments
Here is the other late Archean nitrogen isotope paper. Compare to Garvin et al in Science.
The cycling and redox state of nitrogen in the Archaean ocean. Godfrey Linda V. (2009) Nature Geosci. - Login or register to post comments
Here is a paper exploring a new isotope system. Would be good to get the Hansel group's take on this, as their expertise is closely aligned with the microbial aspects of this geochemical cycle. Overall, as one might expect, there is a transition associated with the GOE.
Fluctuations in Precambrian atmospheric oxygenation recorded by chromium isotopes. Frei Robert (2009) Nature. - created an event in Harvard GeobiologyLogin or register to post commentsFriday, September 18, 2009 - 4:00pm at HUCE seminar room
Here is our next meeting
Morphological record of oxygenic photosynthesis in conical stromatolites. Bosak T (2009) Proc Natl Acad Sci U S A.STROMATOLITES IN PRECAMBRIAN CARBONATES: Evolutionary Mileposts or Environmental Dipsticks?. Grotzinger John P. (1999) Annu. Rev. Earth. Planet. Sci..An abiotic model for stromatolite morphogenesis. Grotzinger John P. (1996) Nature. - created the Harvard Geobiology journal club.September 9, 2009
- joined JournalFire!September 9, 2009