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Author Topic: Arctic Image of the Day  (Read 323345 times)

Andreas T

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Re: Arctic Image of the Day
« Reply #950 on: July 02, 2017, 05:56:46 PM »
sentinel is great for this, this image is of a piece of ice grounded in shallow water off the east siberian coast. Landfast ice between the grounded piece and the coast seen near the bottom of the image has now broken away but the grounded piece is still stuck.
http://apps.sentinel-hub.com/sentinel-playground/?lat=70.70029171169845&lng=165.69820404052734&zoom=11&preset=1_NATURAL_COL0R&layers=B04,B03,B02&maxcc=41&gain=0.5&gamma=1&time=2015-01-01|2017-06-18&cloudCorrection=none&atmFilter=&showDates=false&evalscript=

it looks like layers of accretion around a particularly big chunk which ran agground

seaicesailor

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Re: Arctic Image of the Day
« Reply #951 on: July 02, 2017, 07:35:07 PM »
Nice!!
For comparison, this is what Worldview shows in the same location and day.
With the new tool, some discussion whether that is "garbage ice" or slush or not will be more easily solved (or will it create some more). https://go.nasa.gov/2uyO8bY
« Last Edit: July 02, 2017, 07:49:00 PM by seaicesailor »

numerobis

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Re: Arctic Image of the Day
« Reply #952 on: July 03, 2017, 03:08:47 AM »
Time for a little game. Identify this ship in Hudson Strait at noon today! It was sailing eastwards, dodging some smallish floes.

Jim Pettit

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Re: Arctic Image of the Day
« Reply #953 on: July 03, 2017, 12:49:27 PM »
Time for a little game. Identify this ship in Hudson Strait at noon today! It was sailing eastwards, dodging some smallish floes.

The S.S. Minnow? The Pequod? The USS Caine? Hard to tell from the image. :)

vigilius

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Re: Arctic Image of the Day
« Reply #954 on: July 03, 2017, 01:07:59 PM »
Seen in the Parry Channel...   ...Jabba the Hut?

numerobis

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Re: Arctic Image of the Day
« Reply #955 on: July 03, 2017, 06:14:40 PM »
Time for a little game. Identify this ship in Hudson Strait at noon today! It was sailing eastwards, dodging some smallish floes.

The S.S. Minnow? The Pequod? The USS Caine? Hard to tell from the image. :)

Between the GPS information embedded in the jpg and the public ship logs it should be possible to work it out exactly. I don't actually know the answer.

It was a beautiful day to fly YOW-YFB: starting about at the tree line in Quebec, there were no clouds. I'll have to go through my collection and pick out some nice ones of e.g. the glacial striations on the ground (caused by the retreat of the ice sheets), and the sea which still has wisps of ice in it. And I caught the final approach on video.

An iPhone looking out a passenger window of a 737 isn't the best photography platform, but it's better than you might expect! The main difficulty is when it decides to focus on an ice crystal instead of the background.

VeliAlbertKallio

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Re: Arctic Image of the Day
« Reply #956 on: July 05, 2017, 02:00:14 PM »
Summer has arrived to melt away the hardest iron shield of the Arctic Ice at the core of the ocean. Many other areas of the Arctic Ocean shows rapidly fracturing ice cover, or readily pulverized ice - even near the North Pole (good snapshots to be seen in many areas of the ocean in clear skies):
https://worldview.earthdata.nasa.gov/?p=arctic&l=VIIRS_SNPP_CorrectedReflectance_TrueColor(hidden),MODIS_Aqua_CorrectedReflectance_TrueColor(hidden),MODIS_Terra_CorrectedReflectance_TrueColor,Graticule,Reference_Labels(hidden),Reference_Features(hidden),Coastlines&t=2017-07-05&z=3&v=-1009232.144502394,374380.88566378993,-747088.144502394,539500.8856637899

Kate

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Re: Arctic Image of the Day
« Reply #957 on: July 06, 2017, 06:21:01 AM »
Lots of activity and Barrow looks down right green!

jplotinus

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Re: Arctic Image of the Day
« Reply #958 on: July 07, 2017, 06:42:27 PM »
Here's a candidate for longest observed contrail.
It extends across the Beaufort Sea from a point north (approximately) of Tuktoyaktuk (NU Canada), to a point north (approximately) of Prudhoe Bay (AK USA).

jai mitchell

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Re: Arctic Image of the Day
« Reply #959 on: July 08, 2017, 10:49:15 PM »
 Brian Brettschneider‏ @Climatologist49 25m25 minutes ago

Melt stream running through ice at toe of Matanuska Glacier.

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Cook

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Re: Arctic Image of the Day
« Reply #960 on: July 08, 2017, 10:56:17 PM »
Waves lapping the shore at Barrow Alaska. Wave erosion is bound to increase as larger areas of open water appear. This in addition to melting "perma"frost may cause rapid coastal erosion.


seaicesailor

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Re: Arctic Image of the Day
« Reply #961 on: July 09, 2017, 10:56:55 PM »
Beautiful view of a cyclone over the Hudson bay from space today

numerobis

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Re: Arctic Image of the Day
« Reply #962 on: July 10, 2017, 02:37:54 AM »
An entire weekend of strong winds straight up Frobisher Bay and all I got was these lousy little floes.

There's a lot more off in the distance, just not coming up into Koojessee Inlet.

numerobis

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Re: Arctic Image of the Day
« Reply #963 on: July 12, 2017, 03:29:28 PM »
Those ice floes turned out to be bigger than they first seemed -- as I should have expected, since most of the volume is under the waterline. Here's the dragon of Koojessee Inlet:

jplotinus

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Re: Arctic Image of the Day
« Reply #964 on: July 12, 2017, 03:47:51 PM »
Those ice floes turned out to be bigger than they first seemed -- as I should have expected, since most of the volume is under the waterline. Here's the dragon of Koojessee Inlet:

Summer fashion in Iqaluit, yes? ☺️

marcel_g

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Re: Arctic Image of the Day
« Reply #965 on: July 12, 2017, 03:49:37 PM »
Those ice floes turned out to be bigger than they first seemed -- as I should have expected, since most of the volume is under the waterline.

Really neat to see these photos, thanks numerobis!

numerobis

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Re: Arctic Image of the Day
« Reply #966 on: July 12, 2017, 05:36:27 PM »
Those ice floes turned out to be bigger than they first seemed -- as I should have expected, since most of the volume is under the waterline. Here's the dragon of Koojessee Inlet:

Summer fashion in Iqaluit, yes? ☺️

A beautiful coat of seal and caribou with beads would be more authentic -- not to mention the fox-lined hood with a baby inside. But ice floes in Iqaluit are like squirrels in Montreal: they bring out the foreigners (like me) to take photos.

The summer temperature here is very strange to me. What the thermometer says is almost irrelevant. What really matters is the sun and wind.

I can sit outside by 4 degrees in shorts & t-shirt if it's sunny with calm winds. Conversely, Monday night in my "late fall" clothes (by Montreal standards), I was huddling next to the campfire and shivering despite it being 10 degrees: it was somewhat windy!

In summer, seems wind direction matters a lot too: wind coming from the southeast is cold, wind coming from the northwest is warm. Southeast is water & ice; northwest is land (with a bit of snow left in the shady spots). In winter it's not so different given that it's snow and ice in all directions.

magnamentis

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Re: Arctic Image of the Day
« Reply #967 on: July 13, 2017, 08:29:51 PM »
Those ice floes turned out to be bigger than they first seemed -- as I should have expected, since most of the volume is under the waterline. Here's the dragon of Koojessee Inlet:

ice floes are prone to the same rules like any other swimming ice including huge icebergs, hence this is the norm, just often forgotten.
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epiphyte

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Re: Arctic Image of the Day
« Reply #968 on: July 13, 2017, 08:50:51 PM »
Those ice floes turned out to be bigger than they first seemed -- as I should have expected, since most of the volume is under the waterline. Here's the dragon of Koojessee Inlet:

That's really neat. Probably not too clever to be standing right there though - it's all just good fun until you get squashed by a toppling 50-ton ice Dragon!

Kate

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Re: Arctic Image of the Day
« Reply #969 on: July 15, 2017, 02:39:32 PM »
A beautiful early morning in Barrow

solartim27

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Re: Arctic Image of the Day
« Reply #970 on: July 16, 2017, 07:12:23 AM »
From Anatarctica, appears Suomi is picking up Auroras
« Last Edit: July 16, 2017, 07:33:24 AM by solartim27 »
FNORD

Adam Ash

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Re: Arctic Image of the Day
« Reply #971 on: July 16, 2017, 03:45:10 PM »

Hyperion

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Re: Arctic Image of the Day
« Reply #972 on: July 16, 2017, 04:09:28 PM »
Interesting. That'll fluff up the Ionosphere and increase its insulation capacity.

Active Region 2665 produced a long-duration solar flare measuring M2.4 at its peak time on July 14, 2017. Today's event lasted for more than 2 hours; it started at 01:07, peaked at 02:09 and ended at 03:24 UTC. The eruption produced a coronal mass ejection (CME) with an Earth-directed component. This region is now moving away from the center of the Earth-facing Sun but could still produce moderate to strong eruptions in the days ahead.

The eruption was associated with a Type IV radio emission. Type IV emissions occur in association with major eruptions on the Sun and are typically associated with strong coronal mass ejections and solar radiation storms.

This CME is expected to reach Earth late Sunday, July 16 or early Monday, July 17.




Additionally, a 10cm Radio Burst lasting 44 minutes with peak flux of 130 sfu was associated with the event. A 10cm radio burst indicates that the electromagnetic burst associated with a solar flare at the 10cm wavelength was double or greater than the initial 10cm radio background. This can be indicative of significant radio noise in association with a solar flare. This noise is generally short-lived but can cause interference for sensitive receivers including radar, GPS, and satellite communications.

The greater than 10 MeV proton flux at geosynchronous orbit exceeded the S1 - Minor solar radiation storm threshold at 09:00 UTC.

M2.4 solar flare July 14, 2017

M2.4 solar flare July 14, 2017 - SWX Overview

WSA Enlil model below shows a potential glancing blow from a CME observed off the west limb at approximately 13:00 UTC on July 13. The impact is expected midday July 17, and could possibly combine with today's CME.

The model below shows CME impact expected on July 16:

Region 2665 (beta) is now moving away from the center of the Earth-facing Sun, but is still potent enough to produce moderate to strong eruptions in the days ahead.

Sunspots on July 14, 2017

Sunspots on July 14, 2017. Credit: NASA SDO/HMI

A watch has been issued for likely G2 - Moderate geomagnetic storm conditions on July 16 and 17.

WSA-Enlil model run for July 14th CME impact on July 16
SWPC Alerts

Space Weather Message Code: WARPX1
Serial Number: 460
Issue Time: 2017 Jul 14 1755 UTC

EXTENDED WARNING: Proton 10MeV Integral Flux above 10pfu expected
Extension to Serial Number: 459
Valid From: 2017 Jul 14 0530 UTC
Now Valid Until: 2017 Jul 15 1200 UTC
Warning Condition: Persistence
Predicted NOAA Scale: S1 - Minor

Potential Impacts: Radio - Minor impacts on polar HF (high frequency) radio propagation resulting in fades at lower frequencies.

***

Space Weather Message Code: WATA30
Serial Number: 161
Issue Time: 2017 Jul 14 1029 UTC

WATCH: Geomagnetic Storm Category G2 Predicted

Highest Storm Level Predicted by Day:
Jul 15:  None (Below G1)   Jul 16:  G2 (Moderate)   Jul 17:  G2 (Moderate)

THIS SUPERSEDES ANY/ALL PRIOR WATCHES IN EFFECT

Potential Impacts: Area of impact primarily poleward of 55 degrees Geomagnetic Latitude.
Induced Currents - Power grid fluctuations can occur. High-latitude power systems may experience voltage alarms.
Spacecraft - Satellite orientation irregularities may occur; increased drag on low Earth-orbit satellites is possible.
Radio - HF (high frequency) radio propagation can fade at higher latitudes.
Aurora - Aurora may be seen as low as New York to Wisconsin to Washington state.



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numerobis

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Re: Arctic Image of the Day
« Reply #973 on: July 17, 2017, 01:27:02 AM »
Pity it's so bright out at midnight! And cloudy tonight.

Adam Ash

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Re: Arctic Image of the Day
« Reply #974 on: July 17, 2017, 02:08:15 AM »
Pity it's so bright out at midnight! And cloudy tonight.
Yes, thick cloud and drizzle at 46 deg south made for poor viewing. :(

numerobis

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Re: Arctic Image of the Day
« Reply #975 on: July 17, 2017, 10:58:12 PM »
CCGS Amundsen showed up this weekend (I only finally got the picture off my phone).

At the same time, two empty cargo ships showed up. I assume Amundsen escorted them.


Sebastian Jones

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Re: Arctic Image of the Day
« Reply #977 on: July 20, 2017, 09:33:11 PM »
Numerobis: "At the same time, two empty cargo ships showed up. I assume Amundsen escorted them."
As a resident, what do you suppose two empty cargo ships are doing? These must be about the first ships of the season- and I should have thought that they would be fully laden. Or does all the freight come by Amazon now? ;)

numerobis

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Re: Arctic Image of the Day
« Reply #978 on: July 21, 2017, 03:06:55 AM »
They looked empty, but one it turns out is a tanker, not a container ship. The other I must have misunderstood what I was seeing, because it started unloading yesterday (why it was out there several days without unloading seems to have confused more than one person). That or the ship I saw was a second tanker, left, and was replaced by the first container ship of the season.

numerobis

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Re: Arctic Image of the Day
« Reply #979 on: July 21, 2017, 03:21:48 AM »
What timing! Right after my previous comment, a container ship just steamed off. It's not the "empty" ship I'd seen -- for one, there's big cranes on it; for another, its full of containers.

It's a bit hard to observe from where I am because all but one of the ships is hidden behind an island at the entrance to the inlet. There's no port here. At high tide a barge goes out and they haul cargo onto it.

deconstruct

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Re: Arctic Image of the Day
« Reply #980 on: July 21, 2017, 10:11:05 AM »
What timing! Right after my previous comment, a container ship just steamed off. It's not the "empty" ship I'd seen -- for one, there's big cranes on it; for another, its full of containers.

Was ist probably the Emmagracht (aka Mitiq)?
http://www.sailwx.info/shiptrack/shipposition.phtml?call=PDYX

https://www.marinetraffic.com/de/ais/details/ships/shipid:383086/mmsi:316025029/imo:9081306/vessel:MITIQ

numerobis

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Re: Arctic Image of the Day
« Reply #981 on: July 21, 2017, 01:51:37 PM »
https://m.facebook.com/story.php?story_fbid=10155166699849442&id=100174284441

The Mitiq arrived Wednesday apparently; if it's the one that steamed away it's ahead of schedule. The ships I saw last weekend must have been the two tankers. The paper also says it's a different icebreaker than I'd thought, unless there are two icebreakers here right now.

deconstruct

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Re: Arctic Image of the Day
« Reply #982 on: July 21, 2017, 05:02:12 PM »
From the wording of the facebook message I would assume, that there were 2 icebreakers there: One that escorted the Mitiq, and one that escorts the two tankers.

If you click on the position-link on the sailwx-webpage I linked before, you will get a map and a list where the other ships in the area are also shown.
According to that, there are two ice-breakers there:
The CCGS Terry Fox and the CCGS Henry Larsen.
« Last Edit: July 21, 2017, 05:08:21 PM by deconstruct »

numerobis

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Re: Arctic Image of the Day
« Reply #983 on: July 21, 2017, 10:16:36 PM »
Hopefully I'll be able to take a photo tonight or tomorrow morning. There are two cargo ships and a tanker visible from town, whereas sailwx only shows one.

A bit of ice has floated in as well owing to the SE winds all week long. Might be a pretty sight!