CFS Alert Validation Campaign 2008

Susanne HansonRene Forsberg, Malcom Davidson, Christian Haas, Stefan Hendricks, Duncan Mercer, Marcel Nicolaus, Jeremy Wilkinson

3. November 2008 Copenhagen, CryoVex mid-term processing meeting , Copenhagen Susanne Hanson side 2

Method

3. November 2008 Copenhagen, CryoVex mid-term processing meeting , Copenhagen Susanne Hanson side 3

Reflectors

Corner Reflectors (CR), 1 may 08, Malcom, stefan, christian, susanne, rene

A 183cm B 170cm C 168cm D 168cm E 159 cm

Coordinates under reflector with hand GPS:

FYI-E: 82°32.776 FYI-W 82°32.867 MYI-S 82°33.3804 MYI-N 82°33.6090 Fuel cache62°34.085 62°35.139 62°33.5618 62°33.7219 planned: 83°43.717 actual: 83.72864°

65°10.695 65.17200°

Coordinates processed from differential GPS (to follow when data processed):

GPS placed 4.5m further east from CR GPS placed 4.5m further east west CR GPS placed 4.5m further south from CR GPS placed 4.5m further north from CR

GPS: lexon GPS: MT302464747 GPS: lexon GPS: MT302464747

FYI-E: FYI-W MYI-S MYI-N Fuel cache

3. November 2008 Copenhagen, CryoVex mid-term processing meeting , Copenhagen Susanne Hanson side 4

Setting up the validation lines

Photo: S. Hanson Photo: S. Hanson

Photo: S. Hanson Photo: S. Hanson

3. November 2008 Copenhagen, CryoVex mid-term processing meeting , Copenhagen Susanne Hanson side 5

Snow pits

Note:86-73cm: <1m; I-B;finger73-68 cm: <1mm; I-B;knife68-60 cm:1 mm; II-B-2;finger60 cm : ice lense60-28 cm:1-6mm;III-A-2;fist18-3cm:1-4 mm;III-A-3 medium grained;pencil3-0 cm:1-8mm; III-A-3 maturesurface:dry

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calculateddensi ty g/ l

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3. November 2008 Copenhagen, CryoVex mid-term processing meeting , Copenhagen Susanne Hanson side 6

FYI validation line

FYI-E

FYI-W

NPhoto: S. Hanson

3. November 2008 Copenhagen, CryoVex mid-term processing meeting , Copenhagen Susanne Hanson side 7

MYI validation line

MYI-S

MYI-N

Photo: S. Hanson

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3. November 2008 Copenhagen, CryoVex mid-term processing meeting , Copenhagen Susanne Hanson side 8

FYI: in situ data

FYI Validation Line, CFS Alert April 2008

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Validation line meters

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3. November 2008 Copenhagen, CryoVex mid-term processing meeting , Copenhagen Susanne Hanson side 9

MYI: in situ data

FYI Validation Line, CFS Alert April 2008

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Validation line meters

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3. November 2008 Copenhagen, CryoVex mid-term processing meeting , Copenhagen Susanne Hanson side 10

FYI & MYI Ice Thickness Distribution

MYI Ice Thickness DistributionCFS Alert, April 08

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FYI Ice Thickness DistributionCFS Alert, April 08

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Where MYI ice has a broad distribution of ice thickness between 250 – 760 cm with no representative ice thickness

FYI is very level ice with an ice thickness of 150 – 180 cm…

•Based on 31 drill holes

•Max: 175 cm

•Min: 132 cm

•Based on 43 drill holes

•Max: 727 cm

•Min: 222 cm

3. November 2008 Copenhagen, CryoVex mid-term processing meeting , Copenhagen Susanne Hanson side 11

FYI & MYI Freeboard Distribution

FYI Freeboard DistributionCFS Alert, April 08

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MYI Freeboard Distribution CFS Alert, April 08

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Again FYI has a more simple distribution of freeboard between -6 – 6 cm with the most pronounced values around 5 cm

The distribution of MYI freeboard represent the complexity of the ice with a range from -10 – 124 cm with a typical value of 35 cm

•Based on 43 drill holes

•Max: 124 cm

•Min: - 8 cm

•Based on 31 drill holes

•Max: 11 cm

•Min: - 5 cm

3. November 2008 Copenhagen, CryoVex mid-term processing meeting , Copenhagen Susanne Hanson side 12

FYI & MYI Snow Thickness Distribution

MYI Snow Thickness Distribution CFS Alert, April 08

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FYI Snow Thickness DistributionCFS Alert, April 08

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The snow distribution at the MYI has also a representative value close to 35 cm (40 cm) but also mirrors the complexity of the surface of the MYI with an huge

range of snow thickness

FYI snow thickness is within the range of 10 – 70 cm with a normal distribution around 35 cm

•Based on 73 measurements

•Max: 56 cm

•Min: 13 cm

•Based on 218 measurements

•Max: 154 cm

•Min: 2 cm

3. November 2008 Copenhagen, CryoVex mid-term processing meeting , Copenhagen Susanne Hanson side 13

Closing slide

IPYIPY--DAMOCLES status rapport 2008: DAMOCLES status rapport 2008:

littellittel progress has been made towards interpreting the satellite resulprogress has been made towards interpreting the satellite results (over sea ts (over sea ice) ice) –– due to lack of validation data. It is recommended that efforts due to lack of validation data. It is recommended that efforts are made are made wherever possible within field campaigns to acquire such data, gwherever possible within field campaigns to acquire such data, given the iven the overarching importance of the satellite productsoverarching importance of the satellite products””

Thank youPhoto: S. Hanson