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 foradditions/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 Status NotesIS1.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.

OK Should come as part of current plan

IS11.      Measure ice thickness, elevation, gravity and magnetic anomalies over 10 Greenland glaciers2 and 15 Antarctic glaciers3 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 needed Accomplished for Amundsen coast, peninsula, parts of E Antarctica

IS13.      Measure once surface elevation, ice thickness and seabed bathymetry beneath selected Antarctic Ice Shelves4, along Greenland Fjords5 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 Tongues6.

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

OIB flights, all altitudes

Requirement 11 status:Approx dh/dt

Included in IS11 Last visit Track spacing -- fast flow

Track spacing -- lower catchment Notes

IS11 req. Lat Lon year AltimetryRadar / Gravity Altimetry

Radar / Gravity

Bindschadler IS -81.00 -142.00 -0.1Yes 5 5Byrd -80.25 160.33 -0.25Yes 2010 Profile Profile 40 40Crane -65.40 -62.70 -8 Yes 2011 Profile Profile Profile ProfileDavid -75.33 160.00 0Yes 2010 profile Profile Profile Profile Some British coverageJutulstraumen -71.58 -0.50 0Yes N/A Good German coverageLambert -73.07 67.49 0Yes N/A Good Australian coverageMertz -67.67 144.50 0Yes 2010 5 5 15 15Nimrod -82.35 163.00 -0.2Yes N/A Pine Island -75.00 -101.00 -7 Yes 5 5 5 10Recovery -81.17 -25.50 0Yes 10 10 10 50

ICESat-track coverage of catchment

Rutford -79.17 -80.00 0Yes 2010 1 transect N/A British coverageShirase -70.33 39.00 0Yes Japanese coverageThwaites -75.50 -106.75 -4 Yes 2011 5 5 5 5Totten -66.83 116.33 -1 Yes 2009 20 20 20 20Whillans IS -83.67 -145.00 0.2Yes 5 5 10 10

Other Smith-Pope -75.25 -111.50 -6 No 2011 10 10 10 10important Alison Ice Stream -73.92 -82.07 -4 No 2009 1 transect

Ferrigno IS -73.72 -83.82 -4 No 2009 30 30 30 30 ICESat coverageDe Vicq glacier -75.00 -131.00 -4 No 2011 10 10 10 N/ADenman Glacier -66.75 99.42 -1 No 2009 1 profileNinnis Glacier -68.33 147.50 -0.5No 2009 20 20 20 20Cook Ice Shelf -68.67 152.50 -0.5No 2009 10 10 20 20

Flemming-Seller-69.37 -66.17 -2 No 2009 5 5 N/A

Irregular coverage, many turns ?good bottom detection?

Drygalski -64.72 -61.00 -6 No 2011 Profile Profile Continuous Profile LVIS grid siteGreen -64.97 -61.83 -15No 2011 Profile Profile Continuous Profile LVIS grid siteEvans -76.00 -78.00 0.25No 2011 20 40 20 40

Slessor -79.93 -26.30 0No 2011 10 10 20+ 20+ Called out in Hellmer 2012 Academy -84.26 -60.50 0No Called out in Hellmer 2012

Support Force -82.65 -45.58 0No Called out in Hellmer 2012Bailey -78.99 -30.00 0No 2011 10 10

Proposed revised Req 11 list:

15 glaciers for new IS11 req Lat Lon dh/dt Included in IS11 Last visitTrack spacing, fast flow, altimetry Radar / Gravity

Track spacing, lower catchment, altimetry

Radar / Gravity

Bindschadler IS -81 -142 -0.1 Yes 5 Byrd -80.25 160.3333 -0.25 Yes 2010 Profile Profile 40 40Crane -65.4 -62.7 -8 Yes 2011 Profile Profile Profile Profile

Smith-Pope -75.25 -111.5 -6 No 2011 10 10 10 10Alison Ice Stream -73.92 -82.17 -4 No 2009 1 transectFerrigno IS -73.72 -83.81 -4 No 2009 30 30 30 30Denman Glacier -66.75 99.42 -1 No 2009 1 profileMertz -67.67 144.5 0 Yes 2010 5 5 15 15Pine Island -75 -101 -7 Yes 5 5 5 10Recovery -81.17 -25.5 0 Yes 10 10 10 50De Vicq glacier -75 -131 -4 No 2011 10 N/A 10 N/ACook Ice Shelf -68.67 152.5 -0.5 No 2009 10 10 20 20Thwaites -75.5 -106.75 -4 Yes 2011 5 5 5 5Totten -66.83 116.3 -1 Yes 2009 20 20 20 20Whillans IS -83.67 -145 0.2 Yes 5 5 10 10

Ninnis Glacier -68.33 147.50 -0.5 No 2009 20 20 20 20Flemming-Seller -69.37 -66.17 -2 No 2009 5 5 N/ADrygalski -64.72 -61.00 -6 No 2011 Profile Profile

Continuous Profile

Green -64.97 -61.83 -15 No 2011 Profile ProfileContinuou

s ProfileEvans -76.00 -78.00 0.25 No 2011 20 40 20 40

Slessor -79.93 -26.30 0 No 2011 10 10 20+ 20+ Academy -84.26 -60.50 0 No

Support Force -82.65 -45.58 0 NoBailey -78.99 -30.00 0 No 2011 10 10

Most recent altimetry data

Req 11 glaciers

Req 11 glaciers

Requirement 13 status : Ice shelvesName Lat Lon Last visit Track near Gzone Middle Near front Notes

Included in req. Getz Ice Shelf -74.25 -126.5 2011 yes yes yes

Dotson Ice Shelf -74.4 -112.36 2010 yes yes yes fine longitudinal lines substitute for transverse

Crosson Ice Shelf -74.95 -109.5 2011 yes yes yes fine longitudinal lines substitute for transverseThwaites Glacier Tongue -75 -106.83 2011 yes yes yesPine Island Glacier -75 -101 2011 yes yes yes

Cosgrove Ice Shelf -73.53 -100.75 2011 no no yesCrossed by transit flights, but little low-altitude coverage

Abbot Ice Shelf -72.75 -96 2009 no yes no

George VI Ice Shelf -71.75 -68 2009 no yes no coarse transverse coverage may substituteLarsen C Ice Shelf -67.5 -62.7 2011 yes yes yesVenable Ice Shelf -73.05 -87.33 2009 no no noCook Ice Shelf -68.66 152.5 2009 yes yes no E side not well coveredMoscow University Ice Shelf -67 121 2009 no no noTotten Ice Shelf -66.58 116.08 2009 yes yes yesRiiser Larsen Ice Shelf -74.41 -20 no no no

Fimbul Ice Shelf -70.75 -0.5 no no no Extensive German coverage (not available?)Shackleton Ice Shelf -65.99 100.50 2009 no no no

Not included Filchner ice shelf -79 -40 no no no Extensive British coverage

Req 13 ice shelves