Hurricane Sandy approaches the shore

Just lost power, so this will be my final post until the power comes back on.


Above are the clouds and the updated advisory (#30) for Hurricane Sandy.  Its just offshore southern New Jersey.

Turning off the clouds, we get a look at the regional observatory.  Radars are starting to go offline as we loose communications.  We are mostly loosing the radars on the northeast side of the track, the side with the strongest winds heading towards the coast. In most cases, the radars continue to operate after communications are lost.  We then reconstruct the current fields after the storm.

Now zooming into the landfall location off southern New Jersey.  Glider RU23 is at the interface between the alongshore currents to the southwest, and the inner shelf currents that are flowing offshore.

Above is the temperature record for glider RU23.  The water column is well mixed.

And now above we look at the backscatter, showing the sediment transport.  We have seen this pattern before.  When we have a stratificed two layer system, the high sediment concentrations (red) are confined to the lower layer.  Now, with the stratification gone, the hurricane is mixing the sediment throughout the water column, suspending large amounts of sediment well above the bottom where currents are fast.

Good luck to all and stay safe. See you again when the power comes on.