Archive for June 25th, 2011

Current Conditions

Saturday, June 25th, 2011

Hi everyone,

Just a brief, simple update on Silbo.

Silbo's Path as of the 25th

Lot of Eddys

The first image is a picture of Silbo's path so far as of 11:52am, June 25th. The second is a zoomed-out version of the first, as you can see, the closer we get to the Canary Islands, the stronger the currents (larger arrows) and the prevalence of eddys  increases (large orange-red swirls). Piloting Silbo through these eddys is crucial because should we get caught in one, we'll have to fight its pull, which will drain our battery and possibly send us off course. There is also a SSH (sea surface height) overlay on top of the second image. Blue-green waters in Silbo's prospective area, a good sign of relatively calm waters.

Overview of the North Atlantic Ocean

Here's an image of the North Atlantic Ocean with a temperature overlay. It's difficult to see the eddys here but once again, we're trying to avoid the "darker black swirls." But, it's easy to see the goal of the first leg of the Challenger Mission, flying from the dark blue, cold  Arctic waters to the red, warmer waters to the South.

 

These final two pictures are profiles sent back from Silbo. The smooth lines in the first picture indicate that Silbo is cruising smoothly and the second image is that of the data that Silbo is currently collecting.

-Oliver

Fractal (cold) liquid meccano

Saturday, June 25th, 2011
Buen día a todos !
Enclosed find the thermocline depths field. Only a little area SE Iceland (a warm eddy), locates the thermocline to 250-300 m. The rest of the domain shows upper thermoclines in front of the Silbo path. We could adjust the critic thermocline depth (up of the yoyo depth) when silbo flies in operational way out of the in shore iceland waters area.  We would avoid additional upper thermoclines that could affect its speed.

Fig 1. Thermocline depth field. N Atlantic. 24th june 11.

 

However, the most interesting remark is related the SSHa field.

Fig 2. SSHa field. N Atlantic. 24 jun 11.

The eddies are organized/ordered in scale and sign from the centroid to the border of this incredible liquid meccano. It changes the sign of the gears (eddies) alternatively, and increases the size (submeso->mesoscalar) from the centroid to the border again.
Fig 3.- Fractal liquid cold meccano.
Silbo will fly the Western sector of this incredible feature. He could take advantage of the Cold eddy (the Western side) located South him, or, otherword, the Eastern border of the warm eddy SW him.
I expect you enjoy it !!
un abrazo a todos !
Antonio G.Ramos