Titan's changing lakes |
Titan's changing lakes |
 Jan 29 2009, 07:22 PM
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#1
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 Senior Member  Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542  |
Today's big news?
http://ciclops.org/view/5471/CASSINI_FINDS...ILL_TITAN_LAKES Changes in the south polar region were announced late last year. Is there more to this story now?? |
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Nov 30 2009, 05:53 PM
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#2
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 Senior Member Group: Moderator Posts: 3242 Joined: 11-February 04 From: Tucson, AZ Member No.: 23 |
Where are the south polar dry lakes? What do you think those low, flat areas are in the RADAR sar data that match up with ISS dark areas? That being said, the north polar region seems to have more dedicated lake basins while the south pole has mostly opportunistic playas (though there are a few of those up north too).
As for Kraken Mare, again, I think it is still plausible that Mezzoramia is the south polar version of that sea. -------------------- &@^^!% Jim! I'm a geologist, not a physicist!
The Gish Bar Times - A Blog all about Jupiter's Moon Io |
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Nov 30 2009, 07:05 PM
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#3
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 Member Group: Members Posts: 131 Joined: 30-August 06 From: Moscow, Idaho Member No.: 1086 |
QUOTE (volcanopele @ Nov 30 2009, 10:53 AM)  Where are the south polar dry lakes? What do you think those low, flat areas are in the RADAR sar data that match up with ISS dark areas? I think they're dark areas. They could be anything. If the ethane content of Kraken Mare is substantial, then there's just no way to move it around on seasonal timescales. Oded's Milankovic timescales, maybe. - Jason PS -- I can't even get a copy of this paper -- I guess we're not subscribed to Nature Geoscience here for some reason? |
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Dec 1 2009, 11:23 PM
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#4
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 Member Group: Members Posts: 613 Joined: 23-February 07 From: Occasionally in Columbia, MD Member No.: 1764 |
QUOTE (Jason W Barnes @ Nov 30 2009, 02:05 PM) If the ethane content of Kraken Mare is substantial, then there's just no way to move it around on seasonal timescales. Oded's Milankovic timescales, maybe. Right. Likely difficult to determine remotely (detecting that ethane is there is one thing, as for VIMS/Ontario ; measuring an abundance is another thing. In principle microwave radiometry might be able to do it (or RSS bistatic), might need assumptions about roughness or depth etc.) Titan Mare Explorer will do a bang-up job on lake composition... If Kraken is deep (as its size suggests it should be) it is hard to see that it could be seasonal, regardless of composition. I have been on a jihad for some time to stress Croll-Milankovich. James Croll figured it all out in the 1860s. Milankovich just came along later and did the astronomical math a bit better. (Croll I think was the first to calculate how much colder Europe would be without the Gulf stream, for example ; he studied boulder clays and geological evidence, as well as the astronomical forcing and heat budget.) |
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Dec 2 2009, 05:54 PM
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#5
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Member Group: Members Posts: 131 Joined: 30-August 06 From: Moscow, Idaho Member No.: 1086 |
QUOTE (rlorenz @ Dec 1 2009, 04:23 PM) Titan Mare Explorer will do a bang-up job on lake composition... Assuming that the lake really IS deep enough so as not to volatilize entirely and head south for the summer. - Jason |
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ngunn Titan's changing lakes Jan 29 2009, 07:22 PM
ngunn Aah, there's this:
http://saturn.jpl.nasa.gov/... Jan 29 2009, 07:32 PM volcanopele Here are some the associated graphics:
http://pho... Jan 29 2009, 07:34 PM volcanopele QUOTE (ngunn @ Jan 29 2009, 12:22 PM) Cha... Jan 29 2009, 07:35 PM ngunn That's brilliant, thanks VP. Jan 29 2009, 07:45 PM
Jason W Barnes I actually much prefer that these press releases c... Jan 29 2009, 09:11 PM ngunn QUOTE (Jason W Barnes @ Jan 29 2009, 09:1... Jan 30 2009, 02:14 AM Jason W Barnes QUOTE (ngunn @ Jan 29 2009, 08:14 PM) Whi... Jan 30 2009, 05:33 PM ngunn That is indeed most helpful. Although I'm stil... Jan 30 2009, 08:16 PM rlorenz QUOTE (ngunn @ Jan 30 2009, 03:16 PM) Wha... Feb 4 2009, 03:36 PM Decepticon Does anyone have a radar swath overlay-ed of the s... Feb 2 2009, 10:57 AM titanicrivers QUOTE (Decepticon @ Feb 2 2009, 04:57 AM)... Feb 2 2009, 03:15 PM ngunn Excellent!! Feb 4 2009, 09:11 PM nprev Oh, goodygoodygoody...Santa Ralph hints that a bit... Feb 5 2009, 12:37 AM Juramike Bam! There it is!
Lorenz et al. LPSC (2... Feb 7 2009, 04:48 PM ngunn Brilliant discovery - brilliant paper title!
... Feb 7 2009, 07:20 PM rlorenz QUOTE (ngunn @ Feb 7 2009, 02:20 PM) Bril... Feb 9 2009, 06:22 PM Jason W Barnes QUOTE (rlorenz @ Feb 9 2009, 12:22 PM) Bu... Feb 10 2009, 01:52 AM ngunn Taking this together with earlier VIMS results, ma... Feb 8 2009, 08:37 AM nprev Hmm. Sorry to hear that, Ralph; it was indeed a gr... Feb 9 2009, 07:57 PM ngunn Or perhaps other 'disadvantaged' topics we... Feb 9 2009, 09:15 PM rlorenz QUOTE (ngunn @ Feb 9 2009, 04:15 PM) Perh... Feb 15 2009, 04:21 AM ngunn Great - another potentially variable lake property... Feb 15 2009, 07:51 PM Jason W Barnes VIMS Ontario Lacus paper is now out in print from ... Apr 10 2009, 11:32 PM ngunn A huge thank you (again) for making another fascin... Apr 11 2009, 07:26 AM titanicrivers As above. A very readable and yet compelling pape... Apr 11 2009, 12:28 PM ngunn Is anybody going to have a go at matching the alti... Apr 11 2009, 10:04 PM Jason W Barnes QUOTE (ngunn @ Apr 11 2009, 03:04 PM) Is ... Apr 12 2009, 06:25 PM HughFromAlice The variation in the height of the surface of Onta... Aug 23 2009, 06:08 AM Gsnorgathon Hey! I got lucky and got the whole article. (D... Aug 23 2009, 05:29 PM rlorenz QUOTE (HughFromAlice @ Aug 23 2009, 01:08... Aug 23 2009, 06:26 PM djellison QUOTE (rlorenz @ Aug 23 2009, 07:26 PM) F... Aug 24 2009, 08:01 AM nprev It's a fascinating result, Ralph, and clearly ... Aug 23 2009, 09:08 PM AndyG Reading this made me think of the artwork by Richa... Aug 24 2009, 08:26 AM ngunn BIG changes observed at Ontario Lacus in the 4th a... Sep 1 2009, 11:24 AM titanicrivers QUOTE (ngunn @ Sep 1 2009, 05:24 AM) BIG ... Sep 1 2009, 12:40 PM Hungry4info QUOTE (titanicrivers @ Sep 1 2009, 06:40 ... Sep 1 2009, 01:15 PM ngunn Strange, it works for me OK, although it does invo... Sep 1 2009, 01:34 PM titanicrivers QUOTE (ngunn @ Sep 1 2009, 07:34 AM) Stra... Sep 1 2009, 05:20 PM HughFromAlice QUOTE (titanicrivers @ Sep 2 2009, 02:50 ... Sep 1 2009, 11:30 PM belleraphon1 All..
I found I had to outside the forum and go ... Sep 1 2009, 01:54 PM belleraphon1 And, of course, I copy the wrong abstract... sorry... Sep 1 2009, 01:57 PM remcook How well do the ISS and RADAR 'shorelines... Sep 1 2009, 02:36 PM ngunn I have to admit I'm baffled by the numbers rig... Sep 1 2009, 03:09 PM Sunspot So when will us common folk get to see the T57/T58... Sep 1 2009, 03:40 PM ngunn I've edited my previous post 42 to correct a n... Sep 1 2009, 06:18 PM volcanopele Well, hopefully they will broadcast the oral sessi... Sep 1 2009, 11:34 PM ngunn This presentation will compare apparent shorelines... Sep 3 2009, 11:12 AM Olvegg NASA Cassini Radar Observes Seasonal Change in Tit... Oct 7 2009, 06:11 PM titanicrivers QUOTE (Olvegg @ Oct 7 2009, 01:11 PM) NAS... Oct 8 2009, 03:32 AM ngunn Spectacular changes - and so plain to see! (No... Oct 7 2009, 08:38 PM ngunn I am trying to post the VIMS image of the bottom r... Oct 7 2009, 09:50 PM volcanopele I think the ISS/VIMS/RADAR story is coming along n... Oct 7 2009, 10:02 PM Webscientist QUOTE (volcanopele @ Oct 8 2009, 12:02 AM... Oct 8 2009, 08:54 PM ngunn Link from remcook:
http://www.sciencedirect.com/s... Oct 7 2009, 10:28 PM volcanopele I guess my comment is that I think they have it ba... Oct 7 2009, 11:58 PM Sunspot How wide is thay channel where it appears to open ... Oct 8 2009, 07:53 AM volcanopele The landing site might depend on the season when t... Oct 8 2009, 09:03 PM nprev Hmm. It does seem as if the 'desert' equat... Oct 8 2009, 09:13 PM ngunn QUOTE (nprev @ Oct 8 2009, 10:13 PM) Huyg... Oct 8 2009, 09:53 PM volcanopele Yeah, and storms are not unheard of at the latitud... Oct 8 2009, 09:18 PM nprev Gotcha. I'm definitely thinking flash floods a... Oct 8 2009, 09:36 PM djellison Some posts have been removed from this thread, as ... Oct 9 2009, 04:33 PM titanicrivers Check out Photojournal http://photojournal.jpl.nas... Oct 10 2009, 03:01 PM ngunn VIMS sees specular reflection from Kraken Mare:
Q... Oct 25 2009, 09:48 PM Jason W Barnes QUOTE (ngunn @ Oct 25 2009, 02:48 PM) On ... Oct 26 2009, 02:00 PM ngunn And there's so much more - here:
(struggling ... Oct 25 2009, 10:50 PM ngunn Personal anecdote: perhaps not many people remembe... Oct 26 2009, 12:01 AM Jason W Barnes QUOTE (ngunn @ Oct 25 2009, 05:01 PM) The... Oct 26 2009, 05:32 PM rlorenz QUOTE (Jason W Barnes @ Oct 26 2009, 01:3... Nov 1 2009, 03:11 PM Jason W Barnes QUOTE (rlorenz @ Nov 1 2009, 08:11 AM) As... Nov 2 2009, 06:54 PM rlorenz QUOTE (Jason W Barnes @ Nov 2 2009, 01:54... Nov 6 2009, 08:58 PM volcanopele QUOTE (rlorenz @ Nov 6 2009, 01:58 PM) Wo... Nov 6 2009, 09:26 PM Jason W Barnes QUOTE (rlorenz @ Nov 6 2009, 01:58 PM) Hm... Nov 7 2009, 05:54 AM ngunn Another morsel from the conference abstracts. Any... Oct 26 2009, 01:34 PM ngunn Catching the lakeshine:
Radar 21st December ... Oct 26 2009, 02:33 PM Jason W Barnes QUOTE (ngunn @ Oct 26 2009, 07:33 AM) Cat... Oct 26 2009, 02:46 PM ngunn Yeah, you caught the sun's direct reflection a... Oct 26 2009, 03:04 PM ngunn Thanks, Jason. Congrats to the team and good luck ... Oct 27 2009, 12:41 PM ngunn Excuse a very basic question: would that be one pi... Nov 1 2009, 07:25 PM Juramike QUOTE (ngunn @ Nov 1 2009, 02:25 PM) Excu... Nov 1 2009, 08:05 PM ngunn QUOTE (Juramike @ Nov 1 2009, 08:05 PM) a... Nov 1 2009, 09:17 PM Jason W Barnes QUOTE (ngunn @ Nov 1 2009, 12:25 PM) Excu... Nov 2 2009, 06:56 PM ngunn Article on seasonal and longer term change:
http:/... Nov 30 2009, 10:53 AM volcanopele We shall see. I still think its seasonal. Nov 30 2009, 05:17 PM Jason W Barnes QUOTE (volcanopele @ Nov 30 2009, 10:17 A... Nov 30 2009, 05:37 PM ngunn QUOTE (Jason W Barnes @ Nov 30 2009, 07:0... Nov 30 2009, 09:06 PM Juramike QUOTE (ngunn @ Nov 30 2009, 04:06 PM) Of ... Nov 30 2009, 09:54 PM ngunn I don't have access to the full paper, but fro... Nov 30 2009, 06:00 PM Juramike I really, really, like the idea of the longer term... Nov 30 2009, 07:51 PM ngunn I've been checking authors' websites, but ... Nov 30 2009, 08:32 PM volcanopele Very nice article! Thanks for the link. Thou... Nov 30 2009, 08:50 PM Juramike QUOTE (volcanopele @ Nov 30 2009, 03:50 P... Nov 30 2009, 09:46 PM ngunn Yes. And if the lakes 'breathe' into and o... Nov 30 2009, 10:27 PM remcook So, what is new in this paper? The speculation abo... Dec 2 2009, 08:35 AM |
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