A mesoscale model study of summertime atmospheric circulations in the north polar region of Mars Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/9g54xp64p

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • The Oregon State University Mars MM5 was used in a comprehensive high-resolution study of northern polar summertime circulations. Three simulations (Ls = 120, Ls = 135, and Ls = 150) characterize the changing circulation. The atmosphere is dry, and model dynamics are hydrostatic. A modified TES thermal inertia map provides a realistic simulation of the polar thermal environment. The highest-resolution nest (18 km) resolves complex flows near the cap; zonal-mean easterlies (~10 m/s) and zonal-mean katabatic winds (~5 m/s) near the surface are relatively steady during this study. Katabatic flows are shallow (~300 m); the easterlies are deeper (~1.5 km). Transient eddies are very important within the first scale height; they are excited by mechanisms, and at locations, that change dramatically during this short study period. At Ls = 120 they form along the residual cap edge with a zonal wave number one structure, producing strong excursion winds (10–15 m/s) that blow consistently across the cap. By Ls = 135, strong eddies are seen to form on the northern slopes of Alba Patera and Tharsis. These eddies are quite suggestive of the large annular cloud structures seen in Hubble Space Telescope and Mars Orbital Camera imagery at this location and season and can traverse the high latitudes to reach the residual cap before dissipating. Eddies in the earlier two simulations appear to be primarily excited by energetic flows near the surface. By Ls = 150 an early fall polar jet causes strong winter-like baroclinic eddies to develop. The transient eddies found in this study are probably important in the water cycle of the northern residual cap.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Tyler, D., Jr., and J. R. Barnes (2005), A mesoscale model study of summertime atmospheric circulations in the north polar region of Mars, J. Geophys. Res., 110, E06007, doi:10.1029/2004JE002356.
Rights Statement
Funding Statement (additional comments about funding)
Publisher
Replaces
Additional Information
  • Journal of Geophysical Research
  • Vol. 110 (2005)
  • description.provenance : Made available in DSpace on 2010-04-08T16:42:39Z (GMT). No. of bitstreams: 1 Tyler and Barnes JGR 2005.pdf: 2675988 bytes, checksum: 31933a11f095fe071af89e9fb9f80e97 (MD5) Previous issue date: 2005-06-29
  • description.provenance : Submitted by Linda Lamb (llamb@coas.oregonstate.edu) on 2010-04-07T21:28:09Z No. of bitstreams: 1 Tyler and Barnes JGR 2005.pdf: 2675988 bytes, checksum: 31933a11f095fe071af89e9fb9f80e97 (MD5)
  • description.provenance : Approved for entry into archive by Linda Kathman(linda.kathman@oregonstate.edu) on 2010-04-08T16:42:38Z (GMT) No. of bitstreams: 1 Tyler and Barnes JGR 2005.pdf: 2675988 bytes, checksum: 31933a11f095fe071af89e9fb9f80e97 (MD5)
ISSN
  • 0148-0227

Relationships

In Administrative Set:
Last modified: 12/07/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items