fish cam? bridge radar? gps? helmholtz? cruise report? ms piggy? ROV ice bottom?
I've not even seen a still. Can you not wait until 2023 when Pangea is unblocked and papers first start appearing? Mosaic has very restrictive top-down control of (
) information, trickle-down. Just because you paid 100% of expedition costs with your taxes doesn't give you any right to know what they are doing.
Another AWI snow buoy was pronounced dead this morning by IABP, the 8th such announcement that went unannounced. This one was defective from the day of installment, hardly ever reported air or snow temperatures but worked for 26 days as a GPS buoy.
They should really let the buoys start reporting to Iridium on shipboard to see if the sensors are working rather than wasting helicopter resources deploying. Or maybe test them back in Germany? The IABP record shows they did neither.
This didn't start with Mosaic -- the Arctic buoy program has always been a joke. A thousand second-hand iPhones dropped from a plane could do better tracking ice.
The Polarstern continues to drift back and forth, up and down. From the 3 Sentinels this morning, the ship can be seen moving north along the 116.4º meridian. Displacements are unremarkable: at 126.5 pxls between the 03:11 and 06:25 which pencils out to 2.8 km in 3 hrs 14 minutes or 20.8 km per day.
Since the last S1B, the ship has moved 0.2º east while holding the same latitude 85.9. Winds predicted by GFS seem to be picking up at the ship: they are at 14 m/s now and expected to reach 15.3 m/s or 55 km/hr.
This is close to the worst winds the ship has experienced so far, back on Oct 8th winds reached 60.7 km/hr according to sailwx. The attached graphic shows the wind speed distribution; the attached csv has columns the speeds in km/hr, m/s and knots. These October winds were being called gale force at the time, fair enough:
2019-Oct-08 0600 85.0 136.0 56.9
2019-Oct-08 0500 85.0 136.0 56.9
2019-Oct-08 0400 85.0 135.9 60.7
2019-Oct-08 0300 85.0 135.8 60.7
2019-Oct-08 0200 85.0 135.7 56.9
2019-Oct-08 0100 85.0 135.6 56.9
2019-Oct-07 2300 85.0 135.3 56.9
2019-Oct-08 0600 85.0 136.0 56.9
2019-Oct-08 0500 85.0 136.0 56.9
2019-Oct-08 0400 85.0 135.9 60.7
2019-Oct-08 0300 85.0 135.8 60.7
2019-Oct-08 0200 85.0 135.7 56.9
2019-Oct-08 0100 85.0 135.6 56.9
2019-Oct-07 2300 85.0 135.3 56.9
A gale force wind can be defined as a sustained strong wind, registering between 7-10 on the Beaufort Scale, which indicates wind speeds of 50 - 102 km/h
It's not entirely clear at what height above the ice these winds are measured and modeled. Usually wx tries to get clear of surface topography but that is exactly where wind stress is applied to the ice. The Polarstern has lost 0.4º of longitude in the last 14 hours; this is interesting/confusing because it suggests a wind coming from 180º (measured at the ship) blows the ice due east.T
The 14 m/s is just barely over 50 km/hr so a few more hrs will bring them into a sustained gale force stress regime. GFS today shows the winds peaking at 54 km/hr at 03:00 UTC from 205º on the 12th and not abating until 09:00 tomorrow. The S1B's will cover the ice response quite well.
85.9 116.7 19-11-11 15:00
16 180
85.9 116.7 19-11-11 14:00 14 180
85.9 116.6 19-11-11 13:00 14 180
85.9 116.6 19-11-11 12:00 13 180 [GFS predicted this perfectly: 13.9 m/s 175º, see above]
85.9 116.6 19-11-11 11:00 13 180
85.9 116.5 19-11-11 10:00 11 170
85.9 116.5 19-11-11 09:00 11 170
85.9 116.5 19-11-11 08:00 10 170
85.9 116.5 19-11-11 06:00 11 170 S1B 06:27
85.9 116.4 19-11-11 05:00 10 160
85.9 116.4 19-11-11 04:00 8 160 S1B 04:49
85.9 116.4 19-11-11 03:00 9 160 S1B 03:11
85.9 116.4 19-11-11 02:00 9 180
85.9
116.3 19-11-11 00:00 7 190
The offset is mildly confusing: the 120º is at 75.00 on Sentinel images according to gimp and imageJ angle tools as appropriate to 'Greenland down'. So the offset is 45º, meaning the 116.4 should be drawn at 71.40º towards the pole which is ten thousand pixels off the image.