David James Crisp
Geophysical Fluid Dynamics Laboratory
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Publication
Featured researches published by David James Crisp.
Journal of Atmospheric Chemistry | 1984
James F. Kasting; James B. Pollack; David James Crisp
One-dimensional radiative-convective and photochemical models are used to examine the effects of enhanced CO2 concentrations on the surface temperature of the early Earth and the composition of the prebiotic atmosphere. Carbon dioxide concentrations of the order of 100–1000 times the present level are required to compensate for an expected solar luminosity decrease of 25–30%, if CO2 and H2O were the only greenhouse gases present. The primitive stratosphere was cold and dry, with a maximum H2O volume mixing ratio of 10−6. The atmospheric oxidation state was controlled by the balance between volcanic emission of reduced gases, photo-stimulated oxidation of dissolved Fe+2 in the oceans, escape of hydrogen to space, and rainout of H2O2 and H2CO. At high CO2 levels, production of hydrogen owing to rainout of H2O2 would have kept the H2 mixing ratio above 2×10−4 and the ground-level O2 mixing ratio below 10−11, even if no other sources of hydrogen were present. Increased solar UV fluxes could have led to small changes in the ground-level mixing ratios of both O2 and H2.
Archive | 2010
David James Crisp; M. R. Gunson; Charles E. Miller; Kenneth W. Jucks
Archive | 2005
Glenn S. Orton; Martin J. Burgdorf; Victoria S. Meadows; Jeffrey Edward van Cleve; David James Crisp; John Arthur Stansberry; Sushil K. Atreya
Archive | 2003
Giovanna Tinetti; Victoria S. Meadows; David James Crisp; William. Fong; T. Velusamy; Evan F. Fishbein
Proceedings of The International Astronomical Union | 2001
Victoria S. Meadows; Mark Allen; Lynn Brown; David James Crisp; Amir Fijany; Michael C. Storrie-Lombardi; Eugene A. Ustinov; T. Velusamy; Mark I. Richardson; Yuk L. Yung; Wesley T. Huntress; David J. Desmarais; Kevin J. Zahnle; James F. Kasting; C. Morrow; Norman H. Sleep; Myra B. Cohen; Kenneth H. Nealson; Rob Rye; Michael J. Coleman
Archive | 1995
Jeffrey F. Bell; Philip B. James; L. J. Martin; R. Todd Clancy; Sang Wook Lee; David James Crisp
Archive | 2015
Andrey Savtchenko; Mike Gunson; David James Crisp; Philip T. Partain; Albert Y. Chang; Emily J. Rosenthal; Christian Frankenberg; Robert R. Nelson; Annmarie Eldering; Chris O'Dell; Heather W. Cronk; Thomas E. Taylor
Archive | 2013
David James Crisp; Annmarie Eldering; M. R. Gunson; Randy Pollock
Archive | 2013
Chris O'Dell; Igor N. Polonsky; Christian Frankenberg; David James Crisp; Annmarie Eldering; M. R. Gunson; Debra Wunch; Paul O. Wennberg; Sourish Basu; F. Chevallier
Archive | 2013
David James Crisp; Hartmut Boesch