OIB telecon 5/24/2012 Telecon Agenda: -- Introduction, goals of meeting. (5 min) -- Review of science reqs as of the end of the 2011 field season (Smith/Studinger) (10 min) -- Present M. Studinger's planning document (Studinger) (15 min ) -- Discuss goals for 2012 field season (Team) ( 20 min ) -- Present proposed planning template (Smith) take suggestions for additions/revisions ( 5 min ) Total: 55 min

TBD for today: Process (in order of occurrence) Required Actions Actionee Agenda item for telecon/meeting 1. Identify target areas for science missions based on Level 1 Science Requirements (L1SR) Determine data requirements:  spatial coverage  temporal coverage  instrument suite and priorities Needs to be closely linked to L1SR. IceBridge Science Team First agenda item in the first flight planning telecon. Science Team members to do homework before first telecon. 2. Develop campaign based data acquisition strategy Evaluate 1) using existing data coverage and progress towards meeting L1SR. Needs to be integrated with long- term data acquisition strategy as well. Need to consider available platform configurations and logistic constraints. IceBridge Science Team Project Science Office Can be combined with 1), but needs to be done very early on in the planning process. Ideally, the platform configuration will be known.

Requirement StatusNotes IS1.Measure surface elevation with a vertical accuracy of 0.5 m or better. OK IS2.Measure annual changes in ice sheet surface elevation sufficiently accurate to detect 0.15 m changes in uncrevassed and 1.0 m changes in crevassed regions along sampled profiles over distances of 500 m. OK IS3.Measure ice thickness with an accuracy of 50 m or 10% of the ice thickness, whichever is greater. ??Pending UTIG and CRESIS assessment IS4.Measure free air gravity anomalies to an accuracy of 0.5 mGal and at the shortest length scale allowed by the aircraft ??Pending UTIG and Lamont assessment IS5.Acquire annually, near-contemporaneous ice elevation data with ESA’s Cryosat for underpasses across Greenland and Antarctica. Flight segment should span ESA SARIN and LRS mode boundaries. Coordinate with ESA in situ validation campaigns as possible. one 2012 mission needed IS6.Remeasure annually Antarctic and Greenland surface elevation along established airborne altimeter and ICESat underflight lines that extend from near the glacier margin to near the ice divide missions needed IS7.Collect elevation data so that the combined ICESAT-1-OIB sampling provides an elevation measurement within 10-km for 90% of the area within 100-km of the edge of the continuous Greenland Ice Sheet, as well the Antarctic Amundsen Sea Coast and Peninsula. OKShould come as part of current plan IS11. Measure ice thickness, elevation, gravity and magnetic anomalies over 10 Greenland glaciers 2 and 15 Antarctic glaciers 3 that are rapidly changing now or are likely to change in the next 10 years. Coverage should extend from the terminus to the elevation where velocities are about 50 m/yr. Over the fast flowing deep troughs, the grids must have 5-km spacing or better, with 10-km or better spacing on the surrounding regions of the lower catchment. Cycle through the glacier list for the duration of IceBridge missions needed IS12. Measure once ice thickness, surface elevation, gravity anomalies within 3 km of the Antarctic Ice Sheet Grounding line and along a second line located 10 km upstream of the grounding line missions neededAccomplished for Amundsen coast, peninsula, parts of E Antarctica IS13. Measure once surface elevation, ice thickness and seabed bathymetry beneath selected Antarctic Ice Shelves 4, along Greenland Fjords 5 where we will collect a line along the center of the fjords and three lines across (one at the sill, one near the middle, and one near the glacier front) and beneath Greenland Ice Tongues missions needed IS14. Measure changing distribution of subglacial water over regions of rapidly flowing ice and distribution of subglacial water over interior cold ice. Not OK IS15. Acquire submeter resolution, stereo color imagery covering laser altimetry swaths OK Antarctic L1 science requirements

OIB flights, all altitudes

Requirement 11 status: Approx dh/dt Included in IS11Last visitTrack spacing -- fast flow Track spacing -- lower catchmentNotes IS11 req.LatLonyearAltimetry Radar / GravityAltimetry Radar / Gravity Bindschadler IS Yes 5 5 Byrd Yes2010Profile 40 Crane Yes2011Profile David Yes2010profileProfile Some British coverage Jutulstraumen Yes N/A Good German coverage Lambert Yes N/A Good Australian coverage Mertz Yes Nimrod Yes N/A Pine Island Yes Recovery Yes ICESat-track coverage of catchment Rutford Yes20101 transectN/A British coverage Shirase Yes Japanese coverage Thwaites Yes Totten Yes Whillans IS Yes 5510 Other Smith-Pope No important Alison Ice Stream No20091 transect Ferrigno IS No ICESat coverage De Vicq glacier No N/A Denman Glacier No20091 profile Ninnis Glacier No Cook Ice Shelf No Flemming-Seller No200955N/A Irregular coverage, many turns ?good bottom detection? Drygalski No2011Profile ContinuousProfileLVIS grid site Green No2011Profile ContinuousProfileLVIS grid site Evans No Slessor No Called out in Hellmer 2012 Academy No Called out in Hellmer 2012 Support Force NoCalled out in Hellmer 2012 Bailey No201110

Proposed revised Req 11 list: 15 glaciers for new IS11 reqLatLondh/dtIncluded in IS11Last visit Track spacing, fast flow, altimetryRadar / Gravity Track spacing, lower catchment, altimetry Radar / Gravity Bindschadler IS Yes 5 Byrd Yes2010Profile 40 Crane Yes2011Profile Smith-Pope No Alison Ice Stream No20091 transect Ferrigno IS No Denman Glacier No20091 profile Mertz Yes Pine Island Yes Recovery Yes De Vicq glacier No201110N/A10N/A Cook Ice Shelf No Thwaites Yes Totten Yes Whillans IS Yes 5510 Ninnis Glacier No Flemming-Seller No200955N/A Drygalski No2011Profile Continuou sProfile Green No2011Profile Continuou sProfile Evans No Slessor No Academy No Support Force No Bailey No201110

Most recent altimetry data

Req 11 glaciers

Requirement 13 status : Ice shelves NameLatLonLast visitTrack near GzoneMiddleNear frontNotes Included in req.Getz Ice Shelf yes Dotson Ice Shelf yes fine longitudinal lines substitute for transverse Crosson Ice Shelf yes fine longitudinal lines substitute for transverse Thwaites Glacier Tongue yes Pine Island Glacier yes Cosgrove Ice Shelf no yes Crossed by transit flights, but little low- altitude coverage Abbot Ice Shelf noyesno George VI Ice Shelf noyesnocoarse transverse coverage may substitute Larsen C Ice Shelf yes Venable Ice Shelf no Cook Ice Shelf yes noE side not well covered Moscow University Ice Shelf no Totten Ice Shelf yes Riiser Larsen Ice Shelf no Fimbul Ice Shelf no Extensive German coverage (not available?) Shackleton Ice Shelf no Not includedFilchner ice shelf-79-40no Extensive British coverage

Req 13 ice shelves