December 25th, 2012
The WISSARD's have been busy over the past couple of days packing equipment and preparing for the traverse to Subglacial Lake Whillans, a 611 mile trip from McMurdo (see the maps posted in the Press Kit, on the top right of the home page). We moved equipment from the labs at McMurdo to stage for the traverse, and we are packing up the field labs and equipment at the test site. The drillers are putting in extra effort on Chrismas Day to make sure equipment is ready to go; and lead scientist, Ross Powell should have his extensive instrumentation ready to go today as well--a great Christmas present for sure! We will continue preparing for the traverse tomorrow and Thursday. We hope begin the traverse by the end of this week.
December 21th, 2012
WISSARD activities at the WISSARD test site
Work at the WISSARD test site continued today.
The borehole was reamed during the morning hours and the hole was enlarged.The geothermal probe was deployed. The probe successfully penetrated the sea floor to the depth of ~1.5 meters. Due to time constraints, the thermistors were not deployed in a second test, but sediment was recovered (and sampled) from the probe.
Troubleshooting continued on the percussion corer. It was determined that the hydraulic motor stopped functioning. It was discovered that water had infiltrated the oil-filled electronics can and had caused the motor wires to shut down. The point of water ingress was determined and fixed. The corer was prepared for traversing to deploy in Subglacial Lake Whillans.
Niskin bottles, the in situ water sampler, and the Micro Subglacial Lake Exploration Device will be deployed and tested December 22nd, the last full day of field testing at the WISSARD test site.
Activities at the WISSARD Test Site
Work at the WISSARD test site continued today. Deployment and testing of the instrumentation package for Sub-Ice Exploration (IPSIE) continued. The instrument was deployed down the main borehole through the ice shelf and reached ocean bottom.
Assembly and deployment went smoothly with help from the marine techs and the DOER staff present.
Data retrieval and display also went smoothly will all instruments returning data, and excellent down borehole and side viewing cameras capturing real-time video.
The load transfer cage was utilized in the deployment of the IPSIE, and the multi-purpose winch was employed.The CTD and Muticorer instruments were prepared for deployment by the light winch.NSF OPP staff visited the site.
Tomorrow December 20th, the borehole will be reamed to enlarge the hole for safe deployment of the geothermal probe and additional instruments.
Images will be posted by day on the WISSARD webpage at www.wissard.org in the image galleries under the Multimedia tab, the day following the daily update.