[S-MODE] S-MODE Science Team Meeting

[Samelson, Roger]

Hi folks -

Just to follow up on Jim’s broad and interesting survey this morning and perhaps stimulate some exchange on one set of processes that might be addressed with S-MODE observations and models:

Re frontogenesis, arrest, turbulent dissipation, etc., when Eric Skyllingstad and I looked at this with LES about ten years ago, we concluded that what happened in the “pure" baroclinic frontogenesis case was exactly consistent with the original Hoskins-Bretherton prediction.  That is, the front collapsed nonlinearly all the way to point where K-H instabilities set in.  The resulting added dissipation was evident but still small compared to the classical baroclinic lifecycle terms.  The added dissipation represented a downscale transfer of energy but it was not a classical forward cascade, as it was achieved by the frontal collapse followed by spontaneous onset of K-H instabilities at small scales rather than a true turbulent cascade through a spectral similarity range.  This was for the “pure frontogenesis" case with no surface forcing.  More details here:
https://doi.org/10.1175/JPO-D-10-05016.1
https://doi.org/10.1175/JAS-D-16-0145.1

With surface forcing, the situation changed considerably, as the enhanced surface-driven vertical mixing including coherent roll structures affected the baroclinic development.  The roll structures arose from shear instabilities of the wind-forced near-surface flow.  Ekman buoyancy advection was relatively unimportant; what drove the instabilities was wind-forcing aligned with the near-surface geostrophic flow that enhanced the near-surface shear.
https://doi.org/10.1175/JPO-D-16-0179.1

There’s a reasonable chance that both of these situations might be seen in some form during the S-MODE field program, with observations on multiple scales, and, if so, it would be really interesting to see how they match up with the predictions based on these idealized simulations.

Best regards,
Roger
--
On Jul 6, 2021, at 8:48 AM, Czech, Erin P. (ARC-SGG) via S-MODE <s-mode at espo.nasa.gov<mailto:s-mode at espo.nasa.gov>> wrote:


[This email originated from outside of OSU. Use caution with links and attachments.]

Hi everyone,

Just to ensure there is no confusion, the S-MODE all-hands meeting this Thursday at 10am PT is not cancelled. We are very happy to have Jim McWilliams as a speaker for the full hour and we are hoping that many of you can join us for his talk.

A repost of Tom Farrar’s previous note regarding Thursday’s meeting:

Our next meeting will be next Thursday, July 8 at 10am PT/1pm ET.  Jim McWilliams will speak about "Scientific Frontiers in SMODE: Submesoscale currents, surface gravity waves and internal gravity waves".

By the way, I would like to make sure you are all aware of Jim's recent review paper on oceanic frontogenesis, which is relevant to S-MODE:
https://www.annualreviews.org/doi/abs/10.1146/annurev-marine-032320-120725<https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.annualreviews.org%2Fdoi%2Fabs%2F10.1146%2Fannurev-marine-032320-120725&data=04%7C01%7C%7Ca094bebae21743e4c2c208d940aeb683%7Cce6d05e13c5e4d6287a84c4a2713c113%7C0%7C0%7C637611941394279209%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=9rtPht%2FUoNjmtS%2BvWwz0Z7aSsk6139HYu9cOAjsi0g4%3D&reserved=0>

Thank you,

Erin Czech
Project Manager, Earth Science Project Office
NASA Ames Research Center
Mobile: +1 650 499 6406
erin.czech at nasa.gov<mailto:erin.czech at nasa.gov>

From: S-MODE <s-mode-bounces at espo.nasa.gov<mailto:s-mode-bounces at espo.nasa.gov>>
Reply-To: "Czech, Erin P. (ARC-SGG)" <erin.czech at nasa.gov<mailto:erin.czech at nasa.gov>>
Date: Tuesday, July 6, 2021 at 9:26 AM
To: S-MODE <s-mode at espo.nasa.gov<mailto:s-mode at espo.nasa.gov>>
Subject: [S-MODE] S-MODE Science Team Meeting

Hello everyone,

I am resending the invite for our monthly all-hands meeting science team meeting to ensure that everyone has this recurring event on their calendar. The Webex link and password are below.

Please note that the invite/calendar event previously sent for this meeting will be cancelled.

Thank you,
Erin


S-MODE Science Team Meeting
Hosted by S-MODE Team

https://espo.webex.com/espo/j.php?MTID=m1e46f0cd112e3bd13e2f07158c334618
Thursday, Jul 8, 2021 10:00 am | 1 hour | (UTC-07:00) Pacific Time (US & Canada)
Occurs the second Thursday of every month effective 6/10/2021 until 10/14/2021 from 10:00 AM to 11:00 AM, (UTC-07:00) Pacific Time (US & Canada)
Meeting number: 182 151 0725
Password: waves

Join by video system
Dial 1821510725 at espo.webex.com<mailto:1821510725 at espo.webex.com>
You can also dial 173.243.2.68 and enter your meeting number.

Join by phone
1-650-479-3207 Call-in toll number (US/Canada)
Access code: 182 151 0725
_______________________________________________


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