IPB

Welcome Guest ( Log In | Register )

 
Reply to this topicStart new topic
Creating Clouds: Cracks Or Cryovolcanoes?, Article in the new Science issue
SigurRosFan
post Oct 20 2005, 05:50 PM
Post #1


Member
***

Group: Members
Posts: 531
Joined: 24-August 05
Member No.: 471



Cracks Or Cryovolcanoes? Surface Geology Creates Clouds On Titan

http://www.spacedaily.com/news/saturn-titan-05zd.html


--------------------
- blue_scape / Nico -
Go to the top of the page
 
+Quote Post
OWW
post Oct 21 2005, 08:06 AM
Post #2


Member
***

Group: Members
Posts: 710
Joined: 28-September 04
Member No.: 99



QUOTE (SigurRosFan @ Oct 20 2005, 05:50 PM)
Cracks Or Cryovolcanoes? Surface Geology Creates Clouds On Titan

http://www.spacedaily.com/news/saturn-titan-05zd.html
*


I love it how the next day, other scientists already have a theory that contradicts the first one:

http://uanews.org/cgi-bin/WebObjects/UANew...ArticleID=11870

"Griffith argues that it's improbable that many ice volcanoes, all aligned at 40 degrees south latitude, are forming these clouds"
Go to the top of the page
 
+Quote Post
mike
post Oct 21 2005, 07:21 PM
Post #3


Member
***

Group: Members
Posts: 350
Joined: 20-June 04
From: Portland, Oregon, U.S.A.
Member No.: 86



Different people don't always agree on things. smile.gif
Go to the top of the page
 
+Quote Post
Rob Pinnegar
post Oct 21 2005, 07:36 PM
Post #4


Member
***

Group: Members
Posts: 509
Joined: 2-July 05
From: Calgary, Alberta
Member No.: 426



Especially at this stage of the game. Titan is a complicated place and we still haven't seen large parts of it in much detail yet. Imagine trying to figure out Earth from one lander and an orbiter taking fuzzy pictures. Even without the biosphere it'd be a big job -- plate tectonics, thunderstorms, hurricanes, contintental glaciation, ocean currents, erosion, rivers...

Is Titan just as complex? I hope so, personally.
Go to the top of the page
 
+Quote Post
volcanopele
post Oct 24 2005, 08:16 PM
Post #5


Senior Member
****

Group: Moderator
Posts: 3224
Joined: 11-February 04
From: Tucson, AZ
Member No.: 23



I agree with the VIMS group on this one. I just can't see how a line of volcanoes or cracks right at this latitude across thousands of miles could exist. Most likely we are looking at convection driven by general circulation.

WRT the Roe et al. paper, I don't think the question is why the clouds preferentially form near 0 and 90 degrees west, but why the DON'T seem to form as often at other locations along 40 degrees south.


--------------------
&@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io
Go to the top of the page
 
+Quote Post
Bob Shaw
post Oct 24 2005, 09:56 PM
Post #6


Senior Member
****

Group: Members
Posts: 2488
Joined: 17-April 05
From: Glasgow, Scotland, UK
Member No.: 239



QUOTE (volcanopele @ Oct 24 2005, 09:16 PM)
I agree with the VIMS group on this one.  I just can't see how a line of volcanoes or cracks right at this latitude across thousands of miles could exist.  Most likely we are looking at convection driven by general circulation.

WRT the Roe et al. paper, I don't think the question is why the clouds preferentially form near 0 and 90 degrees west, but why the DON'T seem to form as often at other locations along 40 degrees south.
*


Welllll... ...you get volcanoes on Earth in lines and arcs, and on Mars - and who'd have believed in Valles Marineris, or the East African Rift Valley? So you *can* get large structures associated with vulcanism her, so why not on Titan?

Bob Shaw


--------------------
Remember: Time Flies like the wind - but Fruit Flies like bananas!
Go to the top of the page
 
+Quote Post
Guest_BruceMoomaw_*
post Oct 25 2005, 03:34 AM
Post #7





Guests






The team seems in little doubt that the LATITUDE of the 40 deg S. clouds is determined by Titan's Hadley convection cycles. The question remaining is why they seem to congregate around 0 deg LONGITUDE, and the only plausible explanations for that involve surface phenomena (whether it's geothermal vents of methane vapor, or high mountains over which Titan's winds are blowing).
Go to the top of the page
 
+Quote Post
remcook
post Oct 25 2005, 12:42 PM
Post #8


Rover Driver
****

Group: Members
Posts: 1015
Joined: 4-March 04
Member No.: 47



...but like they say: the fact that the clouds don't appear at exactly the same spot every time is an indication that mountains may not be the cause...
Go to the top of the page
 
+Quote Post
volcanopele
post Oct 25 2005, 05:55 PM
Post #9


Senior Member
****

Group: Moderator
Posts: 3224
Joined: 11-February 04
From: Tucson, AZ
Member No.: 23



QUOTE (Bob Shaw @ Oct 24 2005, 02:56 PM)
Welllll... ...you get volcanoes on Earth in lines and arcs, and on Mars - and who'd have believed in Valles Marineris, or the East African Rift Valley? So you *can* get large structures associated with vulcanism her, so why not on Titan?

Bob Shaw
*

Yes, but two such features, right on the same latitude line, but no where else, and without apparent surface expression seen by either ISS or RADAR? While I would love to see a line of volcanoes or a rift zone, I just don't think the evidence fits. Now, I do agree that volcanic activity is pumping methane into the atmosphere, but I think these geysers are likely more evenly spaced or at least not coincidently on a line of latitude. So Hadley Circulation is likely the cause of their formation location with either a selection effect or something preventing the clouds from forming in other locations is the likely culprits for the supposed clustering at certain longitudes.


--------------------
&@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io
Go to the top of the page
 
+Quote Post

Reply to this topicStart new topic

 



RSS Lo-Fi Version Time is now: 3rd March 2024 - 12:00 PM
RULES AND GUIDELINES
Please read the Forum Rules and Guidelines before posting.

IMAGE COPYRIGHT
Images posted on UnmannedSpaceflight.com may be copyrighted. Do not reproduce without permission. Read here for further information on space images and copyright.

OPINIONS AND MODERATION
Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators.
SUPPORT THE FORUM
Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member.