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Project Reports

• Lee Kump

  This year we published a paper in Geology which proposed that episodic release of hydrogen sulfide (H₂S ) from the ocean caused the end-Permian mass extinction. Moreover, we suggested that the underlying environmental driver, euxinic deep waters (enriched in H₂S), may have been the norm during a billion years of Earth history (from 1.8 Ga to 0.8 Ga), and that H₂S eruptions may have delayed colonization of the land surface

  ROADMAP OBJECTIVES: 1.1 4.1 4.3 5.2 6.1

• Examinations of the Microbial Diversity Found in Ice Cores

  ROADMAP OBJECTIVES: 2.1 5.1 5.2 5.3 6.1 6.2

• Searching for Planets Around Evolved Stars

  ROADMAP OBJECTIVES: 1.2 6.2

• Genomic Record of the Earth’s Early Biosphere

  ROADMAP OBJECTIVES: 4.1 4.2

• Modeling Early Atmospheric Composition and Climate

  ROADMAP OBJECTIVES: 1.1 4.1

• Evolution of a Habitable Planet (Capo)

  ROADMAP OBJECTIVES: 1.1 4.1 6.1

• Evolution of a Habitable Planet (Stewart)

  ROADMAP OBJECTIVES: 1.1 4.1 6.1

• Prebiotic Synthesis: Experimental Studies (Schoonen)

  ROADMAP OBJECTIVES: 3.1

• Isotope Effects in Atmospheric Sulfur Chemistry (Castleman)

  ROADMAP OBJECTIVES: 3.1 4.1

• Geochemical Processes and Biosignatures (House)

  ROADMAP OBJECTIVES: 4.1 5.1 5.2 5.3 6.1

• Evolution of Atmospheric O2, Climate, and Biosphere – Ohmoto

  Evolution of the Atmosphere, Oceans, and Biosphere on Early Earth:
  Geological, Geochemical, and Biological Approaches

  ROADMAP OBJECTIVES: 4.1 6.1

• The Evolution of a Habitable Planet (Sigurdsson)

  ROADMAP OBJECTIVES: 1.1 1.2

• Evolution of a Habitable Planet (Arthur)

  ROADMAP OBJECTIVES: 4.1 5.3 6.1