Planetary Atmospheres
Cover Page/Proposal Summary
ROSS-00 NRA 00-OSS-01
Date Due: 4/28/2000
This proposal shall be used and disclosed for evaluation purposes only, and a copy of this Government notice shall be applied to any reproduction or abstract thereof. Any authorized restrictive notices that the submitter places on this proposal shall also be strictly complied with. Disclosure of this proposal for any reason outside the Government evaluation purposes shall be made only to the extent authorized by the Government. |
Proposal Type: New Proposal |
Proposal Category: Atmosphere Structures and Particles |
Major Equipment Proposal? No |
Do you intend to submit an Education/Public Outreach (E/PO) proposal? No |
Proposal Title: |
Evolution of the Atmosphere and Clouds of Venus |
Abbreviated Proposal Title: |
Evolution of the Atmosphere and Clouds of Venus |
Principal Investigator: |
Dr. Mark Bullock Department of Space Studies Southwest Research Institute 1050 Walnut St., Suite 426 Boulder, CO 80302 Phone: 303-546-9027 Fax: 303-546-9687 E-mail: bullock@boulder.swri.edu |
Signature | Date |
_____________________________________ | ____________ |
Co-Investigators and Collaborators: | |||
Type | Name | Affiliation | |
Sci Co-I | Dr. David H. Grinspoon | Funky Science | david@funkyscience.net |
Sci Collab | Dr. Sean C. Solomon | Carnegie Institution of Washington | scs@dtm.ciw.edu |
Sci Collab | Dr. Roger J. Phillips | Washington University | phillips@wustite.wustl.edu |
Proposal Summary:
We propose a theoretical investigation of the recent evolution of climate on Venus. The geological history of Venus, as revealed by Magellan, is now detailed enough to provide significant constraints on the history of its climate. We will use Venus' geological record to test and refine models of the evolution of its atmosphere and clouds. Our climate models incorporate feedbacks between temperature dependent surface/atmosphere reactions and the radiative effects of clouds and greenhouse gases, which evolve in response to volcanic sources of volatiles. This project consists of the following tasks: We will (1) incorporate a detailed microphysical cloud model of Venus into the climate models, (2) use improvements in H2SO4/H2O optical constants, near-UV absorber treatment and estimates of geological sources of volatiles, (3) develop models of the coupling between surface temperature, mantle convection and partial melt efficiency, (4) study the role that impacts may have had in recent (1 Gy) changes in the clouds and atmosphere, and (5) provide an improved understanding of the history of water on Venus using constraints from cometary D/H and improved exospheric escape modeling. The surface of Venus records a series of volcanic and tectonic events that have both altered Venus' atmosphere and clouds and provided a signature of climate change. The globally synchronous formation of wrinkle ridges on the most widespread volcanic plains unit, emplaced in less than 100 My, were most likely due to the propagation of a climate-induced thermal wave that deformed the surface. In contrast, smaller, more recent volcanic events were insufficient to alter temperatures enough to cause surface deformation. Using the improvements to our climate models from tasks 1-5 above, we will produce models of the last 1 Gy of Venus atmosphere and cloud evolution that are consistent with the detailed global stratigraphy and volcanic history that are now becoming available.
Certification of Compliance with Applicable Executive Orders and U.S. Code
By submitting the proposal identified in this Cover Sheet/Proposal Summary in response to this NRA or AO, the Authorizing Official of the proposing institution (or the individual proposer if there is no proposing institution) as identified below:
Willful provision of false information in this proposal and/or its supporting documents, or in reports required under an ensuing award, is a criminal offense (U.S. Code, Title 18, Section 1001).
Authorizing Official #1: |
Mr. Ron Kalmbach Director of Contracts Southwest Research Institute P.O. Drawer 28510 San Antonio, Texas 78228-0510 Phone: (210) 522-2261 Fax: (210) 522-3359 E-mail: rkalmbach@swri.edu |
Type of Institution: Nonprofit, Nonacademic Organization |
Signature | Date |
_____________________________________ | ____________ |