1. 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

2. 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.

3. 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. 2012 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. 2012 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. 2012 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 6. 2012 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

4. OIB flights, all altitudes

5. 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 -81.00-142.00-0.1Yes 5 5 Byrd -80.25160.33-0.25Yes2010Profile 40 Crane -65.40-62.70-8Yes2011Profile David -75.33160.000Yes2010profileProfile Some British coverage Jutulstraumen -71.58-0.500Yes N/A Good German coverage Lambert -73.0767.490Yes N/A Good Australian coverage Mertz -67.67144.500Yes20105515 Nimrod -82.35163.00-0.2Yes N/A Pine Island-75.00-101.00-7Yes 55510 Recovery -81.17-25.500Yes 10 50 ICESat-track coverage of catchment Rutford -79.17-80.000Yes20101 transectN/A British coverage Shirase -70.3339.000Yes Japanese coverage Thwaites -75.50-106.75-4Yes20115555 Totten -66.83116.33Yes200920 Whillans IS -83.67-145.000.2Yes 5510 Other Smith-Pope -75.25-111.50-6No201110 important Alison Ice Stream -73.92-82.07-4No20091 transect Ferrigno IS -73.72-83.82-4No200930 ICESat coverage De Vicq glacier -75.00-131.00-4No201110 N/A Denman Glacier -66.7599.42No20091 profile Ninnis Glacier -68.33147.50-0.5No200920 Cook Ice Shelf -68.67152.50-0.5No200910 20 Flemming-Seller -69.37-66.17-2No200955N/A Irregular coverage, many turns ?good bottom detection? Drygalski -64.72-61.00-6No2011Profile ContinuousProfileLVIS grid site Green -64.97-61.83-15No2011Profile ContinuousProfileLVIS grid site Evans -76.00-78.000.25No201120402040 Slessor -79.93-26.300No201110 20+ Called out in Hellmer 2012 Academy -84.26-60.500No Called out in Hellmer 2012 Support Force -82.65-45.580NoCalled out in Hellmer 2012 Bailey -78.99-30.000No201110

6. 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 -81-142-0.1Yes 5 Byrd -80.25160.3333-0.25Yes2010Profile 40 Crane -65.4-62.7-8Yes2011Profile Smith-Pope -75.25-111.5-6No201110 Alison Ice Stream -73.92-82.17-4No20091 transect Ferrigno IS -73.72-83.81-4No200930 Denman Glacier -66.7599.42No20091 profile Mertz -67.67144.50Yes20105515 Pine Island-75-101-7Yes 55510 Recovery -81.17-25.50Yes 10 50 De Vicq glacier -75-131-4No201110N/A10N/A Cook Ice Shelf -68.67152.5-0.5No200910 20 Thwaites -75.5-106.75-4Yes20115555 Totten -66.83116.3Yes200920 Whillans IS -83.67-1450.2Yes 5510 Ninnis Glacier -68.33147.50-0.5No200920 Flemming-Seller -69.37-66.17-2No200955N/A Drygalski -64.72-61.00-6No2011Profile Continuou sProfile Green -64.97-61.83-15No2011Profile Continuou sProfile Evans -76.00-78.000.25No201120402040 Slessor -79.93-26.300No201110 20+ Academy -84.26-60.500No Support Force -82.65-45.580No Bailey -78.99-30.000No201110

7. Most recent altimetry data

8. Req 11 glaciers

10. Requirement 13 status : Ice shelves NameLatLonLast visitTrack near GzoneMiddleNear frontNotes Included in req.Getz Ice Shelf-74.25-126.52011yes Dotson Ice Shelf-74.4-112.362010yes fine longitudinal lines substitute for transverse Crosson Ice Shelf-74.95-109.52011yes fine longitudinal lines substitute for transverse Thwaites Glacier Tongue-75-106.832011yes Pine Island Glacier-75-1012011yes Cosgrove Ice Shelf-73.53-100.752011no yes Crossed by transit flights, but little low- altitude coverage Abbot Ice Shelf-72.75-962009noyesno George VI Ice Shelf-71.75-682009noyesnocoarse transverse coverage may substitute Larsen C Ice Shelf-67.5-62.72011yes Venable Ice Shelf-73.05-87.332009no Cook Ice Shelf-68.66152.52009yes noE side not well covered Moscow University Ice Shelf-671212009no Totten Ice Shelf-66.58116.082009yes Riiser Larsen Ice Shelf-74.41-20no Fimbul Ice Shelf-70.75-0.5no Extensive German coverage (not available?) Shackleton Ice Shelf-65.99100.502009no Not includedFilchner ice shelf-79-40no Extensive British coverage

11. Req 13 ice shelves