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uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #450 on: September 16, 2019, 10:02:07 PM »
Mixing. whoi itp103, sep16.
6m temperature over 2C
« Last Edit: September 16, 2019, 10:09:31 PM by uniquorn »

uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #451 on: September 17, 2019, 12:25:14 AM »
A salinity hiccup on whoi itp105 over the last 3 days on both microcats at 5m and 6m
https://www.whoi.edu/page.do?pid=163456

uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #452 on: September 17, 2019, 12:38:43 PM »
Following up on the 2 buoys above, here is amsr2-uhh overlaid onto mercator 0m temperature at 60% transparency, amundsen gulf and mclure strait, jul1-sep15. amsr2-uhh 0% concentration, normally dark blue, has been set to fully transparent.

uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #453 on: September 18, 2019, 07:56:54 PM »
ascat showed some weather over itp105, and an overlay of Aleph_Null's nullschool hindcast would appear to confirm it is associated with fast moving high pressure cyclone, but the dates don't really match up with the low salinity so...
don't know

ascat, north of CAA, day240-260
ascat overlaid with h~f_190906-190911_iwpd_850hPa
edit: technote - poor scaling on the overlay

uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #454 on: September 20, 2019, 02:56:40 PM »
whoi itp116 is the only itp completing full profiles. The rest have flat motor batteries I think.
With the stupid questions thread in mind, here is a closer look at temperature(purple), salinity(red) and density(green), 10-50m, day234-263.
There isn't much thermocline to see at 34m close to the pole(~0.03C), the halocline is more pronounced.
Maybe the mosaic buoys will provide some more revealing data

blumenkraft

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Re: Arctic Ocean salinity, temperature and waves
« Reply #455 on: September 20, 2019, 05:59:00 PM »
New profiler ITP119! \o/
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uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #456 on: September 20, 2019, 11:55:48 PM »
Great news :)
Reposting  whoi itp110 7m-50m from 2018, day264 to 2019, day120 (at location -134.8350  73.6623N) with location insert.

edit: corrected label and added part2
whoi itp110 7m-80m from 2019, day123-218
density green, temperature purple, salinity red
temp    -1.8 to 0.6C
salinity  27.5 to 31.2
density 1021.5 to 1025kg/m^3
« Last Edit: September 21, 2019, 01:49:12 PM by uniquorn »

MyACIsDying

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Re: Arctic Ocean salinity, temperature and waves
« Reply #457 on: September 21, 2019, 07:53:31 PM »
It's hard to match the ITP buoys temperature & salinity profiles with their location using the standard plots provided, so I practiced my R and took a stab at it.

Because of the constraint of one type of value displayed per location point, I started with the average temperature of the 0-60 dbar ocean layer. I'd like to animate it based on date with a fading trail, but if anyone has suggestions for a better calculated value to display, let me know please.

L3 data was available for years 2005-2014

slow wing

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Re: Arctic Ocean salinity, temperature and waves
« Reply #458 on: September 22, 2019, 10:40:24 AM »
It's hard to match the ITP buoys temperature & salinity profiles with their location using the standard plots provided, so I practiced my R and took a stab at it.

Excellent! Much appreciated initiative, MyACIsDying. This is a plot I've wanted to see often.

uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #459 on: September 22, 2019, 12:09:11 PM »
if anyone has suggestions for a better calculated value to display, let me know please.
Very nice. As the data is quite old it may be more interesting to animate depthwise, rather than date. Perhaps a 10m average down to, say, 350m? If you are prepared to share code it would be most welcome on a dev thread.
This approach may also work well with the mosaic buoys.
L3 data time series would be handy for comparison with more recent data in similar locations though. Can you provide a link pls?
edit: I read the small print and see data goes up to 2019
« Last Edit: September 22, 2019, 10:51:46 PM by uniquorn »

blumenkraft

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Re: Arctic Ocean salinity, temperature and waves
« Reply #460 on: September 22, 2019, 04:33:34 PM »
SSS, 01. Sept 2018 to 20. Sept 2019, 10-day increments

Click to play
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blumenkraft

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Re: Arctic Ocean salinity, temperature and waves
« Reply #461 on: September 22, 2019, 04:54:20 PM »
Salinity 30m, 01. Sept 2018 to 20. Sept 2019, 10-day increments

Click to play
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Pmt111500

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Re: Arctic Ocean salinity, temperature and waves
« Reply #462 on: September 22, 2019, 09:51:25 PM »
Yeah, Kara Sea starts to be pretty Atlantic.
Cooling the outside by heat pump.

uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #463 on: September 22, 2019, 10:34:03 PM »
If the model is correct there is also a more clearly defined atlantic finger reaching into the Beaufort from the CAA. See https://forum.arctic-sea-ice.net/index.php/topic,2417.msg188825.html#msg188825 for animation going back to 2017.

This is interesting from the mosaic expedition:
 https://epic.awi.de/id/eprint/50082/1/Expeditionsprogramm_PS122.pdf   page 55
Quote
Outline The sea ice in the Arctic Ocean is changing under global warming, and there is evidence that the inflow of Atlantic water (AW) has reduced the upper ocean stratification enough, such that convective wintertime deepening of the mixed layer may have caused a sizable upward heat flux in parts of the Eurasian Basin. In the more permanently ice-covered central regions of the Arctic Ocean, it is thought that the halocline still prevents vertical mixing and thus, strong upward heat fluxes year-round. However, wintertime measurements hardly exist. Near-surface trapping of heat during the late summer has been of growing importance as the influence of solar radiation entering the ocean increases with snow melt, melt-pond formation and increasing open water fraction of the ice-pack. Observing a full seasonal cycle as well as studying the ice-ocean-atmosphere system in the Arctic at shorter timescales using an extended set of parameters will be extended in an unprecedented manner by MOSAiC. The specific focus of the OCEAN team is here on the physical parameters of the upper ocean, bounding on the sea-ice and the atmosphere, and the interaction with the lower parts of the water column. This will not only improve our understanding of the physics of the upper ocean at times where no or few measurements exist and throughout a full seasonal cycle but also improve our understanding of feedbacks with the sea-ice/snow, the lower atmosphere, biogeochemical processes and the ecosystem. The overall aim of our work is to understand, throughout all seasons, the dynamics in the upper Arctic ocean mixed-layer and the halocline on the scale of turbulent vertical mixing to the (sub)mesoscale, embedded in the Arctic system of large-scale advective pathways of different water masses.

MyACIsDying

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Re: Arctic Ocean salinity, temperature and waves
« Reply #464 on: September 22, 2019, 11:53:23 PM »
if anyone has suggestions for a better calculated value to display, let me know please.
Very nice. As the data is quite old it may be more interesting to animate depthwise, rather than date. Perhaps a 10m average down to, say, 350m? If you are prepared to share code it would be most welcome on a dev thread.
This approach may also work well with the mosaic buoys.
L3 data time series would be handy for comparison with more recent data in similar locations though. Can you provide a link pls?
edit: I read the small print and see data goes up to 2019

Thanks, your suggestion turned out nice and I want to go deeper but ran out of time, so 0-350m it is for now. I'll post the R code over at the dev thread with some warning of amateur practices. Only for the final.zip data again, the others have different structures but next on the list.


uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #465 on: September 23, 2019, 12:16:34 AM »
Very, very nice, an arctic ocean visualisation with the same scale from top to bottom (well 350m)

blumenkraft

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Re: Arctic Ocean salinity, temperature and waves
« Reply #466 on: September 23, 2019, 07:55:25 AM »
Very nice indeed! Thank you, MyACIsDying!
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uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #467 on: September 23, 2019, 01:16:22 PM »
Does R do anything 3D? Playing around with imageJ gave me this so far...
going to dev thread
« Last Edit: September 23, 2019, 01:22:05 PM by uniquorn »

blumenkraft

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Re: Arctic Ocean salinity, temperature and waves
« Reply #468 on: September 23, 2019, 01:27:50 PM »
Let it rotate so you hit every dot. Looks awesome!
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uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #469 on: September 27, 2019, 09:26:48 PM »
I'll post the R code over at the dev thread with some warning of amateur practices. Only for the final.zip data again, the others have different structures but next on the list.
Having fun installing R and the dependencies dependencies, nearly ready to test. Also played around with various overlays but the projection used here is different. 3D is too much for me at the moment.

uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #470 on: September 28, 2019, 10:33:08 AM »
3 new whoi itp buoys for the CAB/Beaufort now, itp117, 118 and 119.
itp116 drifting close to the pole.
itp117 and 118 have SAMI with temperature but no salinity   :-\
« Last Edit: September 28, 2019, 10:57:04 AM by uniquorn »

uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #471 on: September 28, 2019, 12:50:22 PM »
And now ITP 110 has hoisted the white flag and surrender.<snippage>
Were those temp/salinity charts from itp110 or mercator?

uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #472 on: October 01, 2019, 11:56:00 PM »
Ice mass balance buoy, Beaufort.
https://www.cryosphereinnovation.com/386840

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Re: Arctic Ocean salinity, temperature and waves
« Reply #473 on: October 03, 2019, 12:11:03 AM »
Does R do anything 3D? Playing around with imageJ gave me this so far...
going to dev thread
R does a lot for me when I talk right to her :) I'm testing with translating lon/lat into xy coords so I can use base ggplot2 functions like geom_path with coordinates offsets, only y axis down per layer for now to produce the first image. need to optimize it further so I can program angles to rotate the 'camera' around and see all sides. Would take to much processing for now. I'm starting to publish stuff on GitHub if you're interested.

uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #474 on: October 06, 2019, 04:36:19 PM »
Very interested. That's very close to what I've been thinking of. Thanks.
edit - itp116 has a smaller footprint for testing rotation.
« Last Edit: October 06, 2019, 08:31:44 PM by uniquorn »

uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #475 on: October 09, 2019, 03:38:44 PM »
Large format mp4, amsr2-uhh over gmrt bathy, sep1-oct8. Pls download as I'll remove it within 48hrs (it's a bit large) -removed
« Last Edit: October 10, 2019, 09:47:12 PM by uniquorn »

uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #476 on: October 16, 2019, 12:00:31 PM »
mercator 0m temperature overlaid with uni-hamburg amsr2-uhh concentration. 0% concentration, normally dark blue, has been set to fully transparent. sep16-oct15. click to run.

uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #477 on: October 18, 2019, 01:01:03 AM »
mercator 0m salinity overlaid with uni-hamburg amsr2-uhh concentration at 60% transparent. 0% concentration, normally dark blue, has been set to fully transparent. sep17-oct16. click to run.
« Last Edit: October 18, 2019, 01:19:13 AM by uniquorn »

uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #478 on: October 18, 2019, 10:57:00 PM »
whoi-itp103 unsure where to go again at the mouth of the amundsen gulf. Another temperature spike at 6 and 7m, salinity also higher this time with less melt above.
https://www.whoi.edu/page.do?pid=163356

uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #479 on: October 22, 2019, 08:14:08 PM »
This may be a bit large for the mosaic thread so posting temporarily here.
56 mosaic buoy locations from the iabp arcti bupy table http://iabp.apl.washington.edu/maps_daily_table.html. Some of them either very close or duplicated. day292-295.
Labelling doesn't really work at a smaller scale.
Looks like a couple of helicopter trips during that period.

replaced with smaller version, day 283-296, no labels
« Last Edit: October 24, 2019, 12:43:33 AM by uniquorn »

blumenkraft

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Re: Arctic Ocean salinity, temperature and waves
« Reply #480 on: October 28, 2019, 03:56:32 PM »
What's up with this? The salinity alongside Greenland north and CAA is increasing according to Mercator. It could be due to refreezing, right? Or is this Atlantification?

GIF is showing 01.10.2019 to today, daily increments.
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johnm33

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Re: Arctic Ocean salinity, temperature and waves
« Reply #481 on: October 29, 2019, 11:10:13 AM »
Atlantification.
Looking poleward it seems there's tidal induced flows penetrating into Nansen/Amundsen basins via St. Anna trough, forcing surface melting south of the pole around the 90E M. and I'm guessing the eastward flow and bathymetry generates the more saline surfacing water around 140-135E 85N, and the semicircle of saline water it unites with. I suspect there's a certain amount of internal wave formation going on in the basins as a consequence and that when the harmonics are just right there's a reverse gradient formed north of Greenland that facilitates the wind driven departure of it's resident ice. When that wave complex moves back into the deep it'll draw more Atlantic water in.
 
« Last Edit: October 29, 2019, 11:21:52 AM by johnm33 »

blumenkraft

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Re: Arctic Ocean salinity, temperature and waves
« Reply #482 on: October 29, 2019, 12:06:16 PM »
Yes, John. Makes sense to me. Thank you.
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uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #483 on: October 29, 2019, 11:56:11 PM »
@bl some of that looking like upwelling but I haven't been watching closely.
@both. Best to make it clear what is being shown. In both cases it's SSS (0m salinity). Mercator not agreeing with hycom on the low salinity around 90E M. @johnm33 assuming you suggest bottom melt as air temps are ~-20C according to gfs and ecmwf. Unfortunately itp116 not near enough to confirm. https://www.whoi.edu/page.do?pid=164836

whoi itp103 temperatures peaking again at 5-6m. It looks more like a current than mixing. https://www.whoi.edu/page.do?pid=163356
« Last Edit: October 30, 2019, 12:24:28 AM by uniquorn »

uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #484 on: October 30, 2019, 12:20:50 PM »
Mercator temperature 0m, sep21-oct29 with uni-hamburg amsr2-uhh overlay at 60% transparent. (0% concentration fully transparent)
Mercator would appear to be struggling to model the rapid refreeze. click to run
The Mackenzie bay area is interesting. amsr2 indicating rapid refreeze and melt. Worldview image of oct27. Unfortunately it has been cloudy since then
« Last Edit: October 30, 2019, 12:35:13 PM by uniquorn »

blumenkraft

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Re: Arctic Ocean salinity, temperature and waves
« Reply #485 on: October 30, 2019, 05:05:28 PM »
@bl some of that looking like upwelling but I haven't been watching closely.

I agree. You don't think upwelling is contradicting atlantification though, right?

Will do a Mercator 30m GIF. I think this might help.

PS: 103 might be influenced by Pacific waters?
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blumenkraft

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Re: Arctic Ocean salinity, temperature and waves
« Reply #486 on: October 30, 2019, 06:33:13 PM »
Will do a Mercator 30m GIF. I think this might help.

Is it though?  :(

PS: Atlantic surely kissing the Beaufort Gyre.
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uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #487 on: October 31, 2019, 12:04:03 AM »
re itp103, Mercator 34m temperature tells a different story though it's not visibly clear at any depth on the model that pacific waters reach the amundsen gulf.
Bathymetry isn't particularly conducive to kissing along the chukchi plateau :)

uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #488 on: October 31, 2019, 12:26:20 AM »
More on kissing, whoi itp112 is just the other side of the chukchi plateau.
whoi have a nice selection of buoys out now and Bruce Steele's 50m thick warm layer in the Beaufort is not going away. https://www.whoi.edu/page.do?pid=165216
They also have 2 itp's in the mosaic area.

Quote
You don't think upwelling is contradicting atlantification though
With the proviso that my comments are mostly guesswork based on models, scant satellite data and the occasional buoy, no ;)
tech note: date labels are worth the effort
On the Beaufort I think it is worth rereading this post from aslan https://forum.arctic-sea-ice.net/index.php/topic,2417.msg215992.html#msg215992
« Last Edit: October 31, 2019, 12:36:45 AM by uniquorn »

uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #489 on: October 31, 2019, 01:08:32 AM »
weather cleared up over mackenzie bay, amsr2 doing a good job. The wind must have changed.
https://go.nasa.gov/2WszCl5
Also, Bering sea beginning to cool down at 34m after a warm summer :)
(scale as above)

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Re: Arctic Ocean salinity, temperature and waves
« Reply #490 on: October 31, 2019, 03:49:46 AM »
Uniquorn, I went back and reread the old thread with the post from Aslan . In the discussion section of a paper we were discussing
https://advances.sciencemag.org/content/4/8/eaat6773


“With continued sea ice losses in the Chukchi Sea, additional heat may continue to be archived in the warm halocline. This underscores the far-reaching implications of changes to the dynamical ice-ocean system in the Chukchi Sea region. However, there is a limit to this: Once the source waters for the halocline become warm enough that their buoyancy is affected, ventilation can be shut off. Efficient summertime subduction relies on the lateral surface front in the NCS region between warm, salty water that is denser to the south and cooler, fresher water that is less dense to the north. For longer-duration solar warming (that is, longer-duration ice-free conditions in the region), SSTs on the south side of the front may become warm enough (around 13°C, under the assumption of a 1.5-month ice-free period dominated by solar absorption) that the lateral density gradient is eliminated [see (24)]. It remains to be seen how continued sea ice losses will fundamentally change the water column structure and dynamics of the Arctic halocline. In the coming years, however, excess BG halocline heat will give rise to enhanced upward heat fluxes year-round, creating compound effects on the system by slowing winter sea ice growth.”

I am happy to see so many ITP buoys with temp.salinity contours sending data.

uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #491 on: November 01, 2019, 06:14:05 PM »
whoi itp102-119 location and profile contours. Big difference between laptev and beaufort.
itp116 clinging to the lomonosov ridge.

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Re: Arctic Ocean salinity, temperature and waves
« Reply #492 on: November 03, 2019, 01:23:14 PM »

PS: Atlantic surely kissing the Beaufort Gyre.

It's counterintuitive to look at the salinity chart and then see the sea areas that have started to freeze over already.

It's not so much the speed at which freezing has taken over the saltier Laptev, Kara and ESS but rather more why the less saline Beaufort has made such little freezing advancement. 

Of course there has been the incredible heat absorbed over the summer period but the surface has cooled sufficiently on much of the Russian side already. 

Synoptic weather patterns north of Alaska have not helped. This October Alaska has seen huge +ve mean temperature anomalies and these have advected north into the Beaufort. And the ocean currents are still feeding warmth up from the Bering Strait Chukchi and spreading east across the top of Alaska.

Persistent northerlies over the Beaufort are what's needed to encourage both ice freezing and southward advancement. 

uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #493 on: November 17, 2019, 06:38:22 PM »
I wish I knew Niall.
Whoi itp buoys in the Beaufort for reference. Maybe those thick warm layers at 25m are starting to make a difference.
« Last Edit: November 17, 2019, 06:48:25 PM by uniquorn »

uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #494 on: November 20, 2019, 11:52:35 PM »
PS: Atlantic surely kissing the Beaufort Gyre.
Looks like you finally got your kiss :)

uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #495 on: November 25, 2019, 11:22:47 PM »
whoi itp103 (both microcats stopped recently) popped back out of the amundsen gulf and 116 now heading for the fram

uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #496 on: November 27, 2019, 10:23:15 PM »
uni-hamburg amsr2-uhh overlaid onto mercator temperature 0m at 80% transparent. amsr2 0% concentration, normally dark blue, has been set to fully transparent. Chukchi, sep21-Nov26, Large.
Posting temporarily - removed
« Last Edit: November 28, 2019, 11:14:35 PM by uniquorn »

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Re: Arctic Ocean salinity, temperature and waves
« Reply #497 on: November 27, 2019, 11:31:33 PM »
Well thats a keeper, so much to see, i can't express how much i appreciate your work here thank you.

blumenkraft

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Re: Arctic Ocean salinity, temperature and waves
« Reply #498 on: November 28, 2019, 05:32:56 PM »
+1
Refugees welcome

uniquorn

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Re: Arctic Ocean salinity, temperature and waves
« Reply #499 on: November 30, 2019, 06:37:51 PM »
uni-hamburg amsr2-uhh overlaid onto mercator temperature 34m at 60% transparent. amsr2 0% concentration, normally dark blue, has been set to fully transparent. sep21-Nov29, Large.
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« Last Edit: December 01, 2019, 09:50:11 PM by uniquorn »