Data and color images are available via - Sea ice conditions in the Transpolar Drift in August/

http://www.awi-bremerhaven.de/Modelling/SEAICE/icereport/index.html

- 19

-TimeUTC Latitude[◦N] Longitude[◦E] TrueWindspeed[m/s] TrueWinddirection[◦] AirTemperature[◦C] Shipspeed[kn] NumberofEngines Operationmode:channel=0, lead=1,floeice=3,ramm Totaliceconcentration[% Cthinice<30cm[%] Typicalseaicethickness Snowthickness[cm] Typicalfloediameter[m] Max.floediameter[m] Meltpondcoverage[%] Typicalponddiameter[m Maximumponddiameter Dirtyiceconcentration[% Leadwidth[m] Leadfloes,diameter[m] Typicalridgeheight[m] Max.ridgeheight[m] Typicalridgespacing[m Ridges:New=0,Old=1,B Rubblefields,coverage Icebergs,Numberof

10:00 very poor visibility<300m 11:00 poor visibility, no ice observations 14:00 following HEALY while streamering 15:00 poor visibility

Hour Port Ahead Starboard

1:00

3:00

7:00

- 20

-8.8.2001

Hour Port Ahead Starboard

15:00

19:00

- 21

15:00 most meltponds are snowcoverd now, floes are quite level with few, linear ridges 17:00 pictures taken after a big lead while POLARSTERN was following HEALY 21:00 heading N for TV-grab station, meltponds with snow cover not detectible

Hour Port Ahead Starboard

3:00

7:00

8:00

- 22

-9.8.2001

Hour Port Ahead Starboard

10:00

21:00 poor visibility<300m

22:00 following HEALY in channel, meltponds snow covered, fog =>bad visibility

Hour Port Ahead Starboard

1:00

14:00

17:00

- 24

-10.8.2001

Hour Port Ahead Starboard

19:00

22:00

- 25

1:00 meltponds snow covered, fog =>bad visibility 3:00 meltponds snow covered, fog =>bad visibility 12:00 wide lead

20:00 system of leads, partially ramming, some spectacular and high ridges 22:00 following leads in various directions

24:00 heading south in old ice regime, ramming from time to time

Hour Port Ahead Starboard

1:00

11:00

12:00

- 26

-11.8.2001

Hour Port Ahead Starboard

13:00

-22:00

- 28

-Data and color images are available via

http://www.awi-bremerhaven.de/Modelling/SEAICE/icereport/index.html

- 29

10:00 fog, poor visibility, no ice obs

17:00 poor visibility<300m, no PODAS data, new ice formation 19:00 no PODAS data

22:00 snow, new ice formation, melt ponds with sediment & algae

Hour Port Ahead Starboard

0:00

1:00

7:00

- 30

-12.8.2001

Hour Port Ahead Starboard

8:00

22:00

- 31

1:00 it is snowing, fresh snow cover on ice and it is difficult to estimate dirty ice %, grease ice % 3:00 snowing, bad visibility, grease ice∼5%

6:00 snow 7:00 still snowing

8:00 heavy snowfall accumulating on the ice and as slush on the water 17:00 fresh snow ->sediment not visible

21:00 situation after snowfall, meltponds & dirty ice not detectible completely, on station since 18:00 UTC

Hour Port Ahead Starboard

1:00

6:00

7:00

- 32

-13.8.2001

Hour Port Ahead Starboard

8:00

10:00

21:00

- 33

1:00 situation after snowfall, 5% grease ice 3:00 it is snowing, 5% grease ice 6:00 snow, some new ice formation

7:00 still snowing, on station in lead, no ice thickness entimation, melt ponds hardly detectible 13:00 on station, snow

16:00 on Dredge station, meltponds & dirty ice with snow cover hardly visible 18:00 going with Dredge, snow, poor visibility, meltpond and dirty ice hardly visible 22:00 snowfall, new ice formation, ponds & dirty ice snow covered

Hour Port Ahead Starboard

1:00

17:00

19:00

- 34

-14.8.2001

Hour Port Ahead Starboard

22:00

- 35

1:00 snowfall, new ice formation, ponds & dirty ice snow covered 3:00 snowfall, new ice formation, ponds & dirty ice snow covered 6:00 light snowfall

7:00 still snowing, ponds snow covered, ridges hardly visible, on station

17:00 maneuvering in ice floe field, after snowfall meltponds & dirty ice hardly detectible, ramming shows dirty ice 18:00 new snow

19:00 turning in ice field for dredge 20:00 on station

23:00 ramming through a crack between two very big ice floes, speed reduced to 1.5 kn

Hour Port Ahead Starboard

1:00

3:00

6:00

- 36

-15.8.2001

Hour Port Ahead Starboard

18:00

19:00

20:00

- 37

1:00 ponds and dirty ice are covered by fresh snow

3:00 ponds and dirty ice are covered by fresh snow, fog, poor visibility 7:00 white out, some dirty ice

18:00 fresh snow, ice crust, dirty ice and melt ponds covered by snow

19:00 rain, transit to TV-Grab Station, ice floes snow covered, dirty ice and ponds hardly detectible 22:00 end of TV-Grab station, ice floes are snow covered

Hour Port Ahead Starboard

1:00

6:00

7:00

- 38

-16.8.2001

Hour Port Ahead Starboard

19:00

20:00

21:00

22:00

- 39

-TimeUTC Latitude[◦N] Longitude[◦E] TrueWindspeed[m/s] TrueWinddirection[◦] AirTemperature[◦C] Shipspeed[kn] NumberofEngines Operationmode:channel=0, lead=1,floeice=3,ramming=4 Totaliceconcentration[%] Cthinice<30cm[%] Typicalseaicethickness[m] Snowthickness[cm] Typicalfloediameter[m] Max.floediameter[m] Meltpondcoverage[%] Typicalponddiameter[m] Maximumponddiameter[m Dirtyiceconcentration[%] Leadwidth[m] Leadfloes,diameter[m] Typicalridgeheight[m] Max.ridgeheight[m] Typicalridgespacing[m] Ridges:New=0,Old=1,Both=2 Rubblefields,coverage[%] Icebergs,Numberof

1:00 ice floes are snow covered

9:00 ponds snow covered, snow covered with ice crust, ridges badly visible at low contrast 20:00 large lead, ponds snow covered

22:00 ponds and dirty ice are snow covered 23:00 ponds and dirty ice are snow covered

Hour Port Ahead Starboard

1:00

6:00

10:00

- 40

-17.8.2001

Hour Port Ahead Starboard

18:00

21:00

23:00

24:00

- 41

20:00 many ponds not snowed but ice covered 21:00 new thin ice forming in wind shelterd areas

Hour Port Ahead Starboard

20:00

21:00

22:00

- 42

-Data and color images are available via

http://www.awi-bremerhaven.de/Modelling/SEAICE/icereport/index.html

- 43

1:00 lead is very large, it’s not possible to estimate ice characteristics 3:00 dirty ice is snow covered

9:00 fog

17:00 new ice in leads, huge area of open water

Hour Port Ahead Starboard

1:00

3:00

18:00

- 44

-Data and color images are available via

http://www.awi-bremerhaven.de/Modelling/SEAICE/icereport/index.html

- 45

1:00 on station in large (500m x 500 m) lead, difficult to decribe the ice

3:00 it is snowing, ice floes are coverd by fresh snow, it’s difficult to estimate dirty ice 7:00 ridges hard to estimate (height, distance)

14:00 melt ponds are ice covered with very thin new snow on top, some sediments during ice station 23:00 dense fog, just started steaming from dredge station

Hour Port Ahead Starboard

3:00

7:00

12:00

- 46

-20.8.2001

Hour Port Ahead Starboard

14:00

- 47

12:00 no fresh snow, melting surface layer, meltponds with thin ice crust, streams connecting ponds 17:00 two icebergs + sediments + rocks, one iceberg at horizon

Hour Port Ahead Starboard

3:00

6:00

- 48

-Data and color images are available via

http://www.awi-bremerhaven.de/Modelling/SEAICE/icereport/index.html

- 49

-TimeUTC Latitude[◦N] Longitude[◦E] TrueWindspeed[m/s] TrueWinddirection[◦] AirTemperature[◦C] Shipspeed[kn] NumberofEngines Operationmode:channel=0, lead=1,floeice=3,ramming=4 Totaliceconcentration[%] Cthinice<30cm[%] Typicalseaicethickness[m] Snowthickness[cm] Typicalfloediameter[m] Max.floediameter[m] Meltpondcoverage[%] Typicalponddiameter[m] Maximumponddiameter[m Dirtyiceconcentration[%] Leadwidth[m] Leadfloes,diameter[m] Typicalridgeheight[m] Max.ridgeheight[m] Typicalridgespacing[m] Ridges:New=0,Old=1,Both=2 Rubblefields,coverage[%] Icebergs,Numberof

1:00 on Dredge station, we work in large lead, strong fog, very poor visibility 3:00 on Dredge station, we work in large lead, strong fog, very poor visibility 6:00 much open water

7:00 new ice formation, fog, as far as visible: just water, no ice

14:00 very foggy; 2 icebergs very closely passed, probably more in the vincinity; green and blue ponds, some melted through, many algae and some floes are sedimented 20:00 very foggy; green and blue ponds, some good icebreaking

21:00 huge ice free area and very poor visibility, 2 large icebergs>50m 22:00 very poor visibility, fog, operating in big lead

23:00 fog, poor visibility

Hour Port Ahead Starboard

6:00

7:00

14:00

- 50

-22.8.2001

Hour Port Ahead Starboard

20:00

23:00

- 51

1 85.40 16.52 8.1 174 -2.8 6.6 3 1+3 80 0 1.5 10 30 5 30

3 85.38 14.73 8.1 177 -2.5 0.2 2 1

7 85.40 15.83 11.1 177 -2.1 6.4 1+3 70 1.8 10 300 1000 70 10 30 100 1.5 2.5 100 1

1:00 beginning of station, very poor visibility - fog

Hour Port Ahead Starboard

1:00

- 52

-Data and color images are available via

http://www.awi-bremerhaven.de/Modelling/SEAICE/icereport/index.html

- 53

13:00 spaces between older floes are filled with thin and undeformed FYI, very evenly ponded with most ponds melted through 16:00 operating in big lead, dirty ice not detectible

19:00 in open water, fog, hard to estimate ice situation, no wind data 20:00 fog and giant lead - 1.5 x 7 km large

21:00 sunny!

Hour Port Ahead Starboard

1:00

3:00

6:00

- 54

-24.8.2001

Hour Port Ahead Starboard

14:00

6:00 some new ice formation 12:00 Petrology station, clear sky!

15:00 good visibility, very homogeneous floes with few ridges, green and blue ponds.

17:00 on station

Hour Port Ahead Starboard

1:00

6:00

7:00

- 56

-25.8.2001

Hour Port Ahead Starboard

12:00

15:00

16:00

17:00

21:00

- 57

Hour Port Ahead Starboard

1:00

3:00

6:00

- 58

-26.8.2001

Hour Port Ahead Starboard

9:00

15:00

- 59

-TimeUTC Latitude[◦N] Longitude[◦E] TrueWindspeed[m/s] TrueWinddirection[◦] AirTemperature[◦C] Shipspeed[kn] NumberofEngines Operationmode:channel=0, lead=1,floeice=3,ramming=4 Totaliceconcentration[%] Cthinice<30cm[%] Typicalseaicethickness[m] Snowthickness[cm] Typicalfloediameter[m] Max.floediameter[m] Meltpondcoverage[%] Typicalponddiameter[m] Maximumponddiameter[m Dirtyiceconcentration[%] Leadwidth[m] Leadfloes,diameter[m] Typicalridgeheight[m] Max.ridgeheight[m] Typicalridgespacing[m] Ridges:New=0,Old=1,Both=2 Rubblefields,coverage[%] Icebergs,Numberof

0:00 on station, fog, bad visibility 3:00 on station, fog, bad visibility 17:00 fog, sediments

20:00 mixture of very level, greyish and very ridged floes; many ponds melted through, it seems that many ridges are formed by blocks of very thin ice, no sediments 22:00 many pressure ridges, ship is ramming

Hour Port Ahead Starboard

10:00

14:00

16:00

- 60

-27.8.2001

Hour Port Ahead Starboard

19:00

21:00

22:00

- 61

0:00 ship is ramming, fog 2:00 on station, fog, poor visibility 5:00 fog, thin ice

11:00 on station 15:00 leaving station

18:00 on station, fog, poor visibility

21:00 seismic transit, some fog, big leads at the end of observation, some very fine new ice 23:00 seismic transit, fog, poor visibility

Hour Port Ahead Starboard

5:00

11:00

15:00

- 62

-28.8.2001

Hour Port Ahead Starboard

18:00

21:00

- 63

2:00 seismic transit, following HEALY 4:00 seismic transit, following HEALY 5:00 seismic transit, following HEALY

10:00 many icebergs around the ship (11 of them 100-200m dist,>20 15-100m dist) 17:00 on station

21:00 several icebergs

Hour Port Ahead Starboard

2:00

4:00

5:00

- 64

-29.8.2001

Hour Port Ahead Starboard

21:00

- 65

5:00 all covered with new or thin old ice, ponds new covered (thin snow); clean HEALY channel 16:00 new ridge forming at floe contacts, new ice (grease) in leads

17:00 ponds covered with snow, new ice partly

18:00 ice under pressure, new ridges at contact points, melt ponds snow covered, foggy, some new ice 19:00 seismic transit, following HEALY, snowfall, new ice formation

20:00 seismic transit, following HEALY, more snowfall, new ice formation 23:00 following HEALY

Hour Port Ahead Starboard

1:00

4:00

5:00

- 66

-30.8.2001

Hour Port Ahead Starboard

16:00

17:00

18:00

19:00

20:00

- 67

4:00 very foggy

5:00 ponds covered with a thin layer of new snow, very foggy 16:00 melt ponds snow covered

17:00 melt ponds snow covered 18:00 melt ponds snow covered

22:00 fog, it is difficult to estimate ice characteristics, new ice formation

Hour Port Ahead Starboard

3:00

5:00

6:00

- 68

-31.8.2001

Hour Port Ahead Starboard

8:00

14:00

15:00

16:00

- 69

0:00 many icebergs around us, two of them as high as 20 m, new ice formation

11:00 ponds snow covered, hardly distinguishalbe, most water covered with slush due to recent snowfalls 12:00 ponds and sediments not visible due to fresh snow

16:00 ponds mostly snow covered, some visible, new ice formation, snow 22:00 on station, it’s snowing, bad visibility

Hour Port Ahead Starboard

3:00

11:00

12:00

- 70

-1.9.2001

Hour Port Ahead Starboard

14:00

16:00

- 71

0:00 waiting for HEALY, it is snowing, very poor visibility 4:00 ponds snow covered

5:00 frozen ponds appear greyish due to last days snow and rain 16:00 new ice

22:00 melt ponds are fresh snow covered, new ice formation 23:00 melt ponds are fresh snow covered, new ice formation

Hour Port Ahead Starboard

3:00

4:00

5:00

- 72

-2.9.2001

Hour Port Ahead Starboard

15:00

16:00

21:00

- 73

16 86.27 72.55 4.7 193 -3.4 4 4 0 90 2 10 500 1500 30 5 10 2 2.5 200 2

17 86.37 73.02 5.3 214 -3.2 4.5 4 0 90 5 1.7 15 150 1000 10 10 30 0 50 20 1 3 200 1 1

21 86.62 74.02 5.5 233 -2.5 4.2 4 0 90 5 1.6 15 200 1000 10 10 25 0 50 10 1 3 150 1

23 86.77 75.28 5.8 241 -2.4 4.5 4 0 90 5 1.6 20 200 1000 50 10 1 3 100 2

17:00 ponds partially snow covered. HEALY sometimes needs to ram 21:00 ice floes are fresh snow covered, new ice formation

23:00 ice floes are fresh snow covered, new ice formation

Hour Port Ahead Starboard

15:00

17:00

- 74

-Data and color images are available via

http://www.awi-bremerhaven.de/Modelling/SEAICE/icereport/index.html

- 75

10:00 all ice coverd with 5cm powder snow, all water covered with nilas 12:00 fog

15:00 following HEALY

16:00 all open water coverd with nilas, long system of leads 21:00 ice floes are snow covered (fresh snow), new ice formation 23:00 ice floes are snow covered (fresh snow), new ice formation

Hour Port Ahead Starboard

2:00

9:00

10:00

- 76

-4.9.2001

Hour Port Ahead Starboard

12:00

15:00

16:00

18:00

- 77

3:00 new ice, following HEALY, ice thickness probably underestimated

4:00 ahead photo shows where HEALY had to ram 3-4 times, sb photo shows 15m high pinackle iceberg at horizon 21:00 new ice formation

23:00 new ice formation

Hour Port Ahead Starboard

2:00

3:00

4:00

- 78

-5.9.2001

Hour Port Ahead Starboard

9:00

10:00

11:00

- 79

Hour Port Ahead Starboard

21:00

- 80

-Data and color images are available via

http://www.awi-bremerhaven.de/Modelling/SEAICE/icereport/index.html

- 81

5:00 ponds not visible, staeming without HEALY

15:00 very foggy, poor visibility, max. floe size and % ice coverage hard to estimate 18:00 fresh snow cover, no melt ponds visible, transit to station

Hour Port Ahead Starboard

2:00

5:00

18:00

- 82

-7.9.2001

Hour Port Ahead Starboard

19:00

23:00

- 83

-TimeUTC Latitude[◦N] Longitude[◦E] TrueWindspeed[m/s] TrueWinddirection[◦] AirTemperature[◦C] Shipspeed[kn] NumberofEngines Operationmode:channel=0, lead=1,floeice=3,ramming=4 Totaliceconcentration[%] Cthinice<30cm[%] Typicalseaicethickness[m] Snowthickness[cm] Typicalfloediameter[m] Max.floediameter[m] Meltpondcoverage[%] Typicalponddiameter[m] Maximumponddiameter[m Dirtyiceconcentration[%] Leadwidth[m] Leadfloes,diameter[m] Typicalridgeheight[m] Max.ridgeheight[m] Typicalridgespacing[m] Ridges:New=0,Old=1,Both=2 Rubblefields,coverage[%] Icebergs,Numberof 10:00 ship just in thin ice, not possible to estimate thickness

16:00 20% of surface covered with frozen ponds, some sediment visible, a very dirty spot was sighted in the afternoon, some open water in leads surrounded by nilas 21:00 strong fog

23:00 strong fog, very poor visibility

Hour Port Ahead Starboard

2:00

15:00

16:00

- 84

-8.9.2001

Hour Port Ahead Starboard

17:00

19:00

- 85

3:00 conditions difficult to judge 9:00 conditions difficult to judge 11:00 poor visibility<300m 13:00 fog

14:00 fog 15:00 fog

16:00 ponds frozen and snow covered, but visible

17:00 pressure ridge formation, ship stuck, lots of algae on ice underside (red) 21:00 pressure ridge formation, ship stuck, lots of algae on ice underside (red)

Hour Port Ahead Starboard

13:00

16:00

17:00

- 86

-9.9.2001

Hour Port Ahead Starboard

21:00

- 87

10:00 fog, only very few green ponds visible from helicopter, new ridges at floe contacts 11:00 fog and poor visibility

13:00 fog, white out, difficult to estimate 14:00 fog

16:00 only some few green ponds are snow free visible; still much ramming; new ridges at floe contact 17:00 POLARSTERN got stuck

18:00 ramming in ice, fog, algae in broken ice

19:00 still ramming, some melt ponds without snow cover 22:00 on station

Hour Port Ahead Starboard

10:00

14:00

16:00

- 88

-10.9.2001

Hour Port Ahead Starboard

17:00

18:00

22:00

- 89

2:00 only few meltponds visible, many ridges formed by ramming 9:00 POLARSTERN got stuck again, snowfall

10:00 snowfall and fog; very few snow-free green ponds, others partially visible; ice under pressure, new ridges at floe contact 11:00 strong snowfall, mainly horizontal, big snowflakes, on station

13:00 ship on staion, fresh snow fall 15:00 snow, poor visibility

16:00 20% melt pond cover, snow and ice covered, greyish; ice under pressure 17:00 still ramming at same position

21:00 on station, fog, poor visibility 23:00 on station, it’s snowing, poor visibility

Hour Port Ahead Starboard

2:00

10:00

16:00

- 90

-Data and color images are available via

http://www.awi-bremerhaven.de/Modelling/SEAICE/icereport/index.html

- 91

3:00 still running at same position

12:00 POLARSTERN got stuck, dirty ice visible in floes (algae?), meltpond snow covered

16:00 rain, still ramming at the same floe since 15:30, new ridges at floe contacts; ponds well visible and almost snow free 17:00 rain

18:00 some heavily rubbled floes, dirty, heavy sediments inside the ice, many ponds snow free but frozen, rain, sediments around formerly broken ice 21:00 poor visibility, it is not possible to estimate ice floe sizes, rain

23:00 on station, poor visibility, it is difficult to estimate floe size

Hour Port Ahead Starboard

17:00

- 92

-Data and color images are available via

http://www.awi-bremerhaven.de/Modelling/SEAICE/icereport/index.html

- 93

-TimeUTC Latitude[◦N] Longitude[◦E] TrueWindspeed[m/s] TrueWinddirection[◦] AirTemperature[◦C] Shipspeed[kn] NumberofEngines Operationmode:channel=0, lead=1,floeice=3,ramming=4 Totaliceconcentration[%] Cthinice<30cm[%] Typicalseaicethickness[m] Snowthickness[cm] Typicalfloediameter[m] Max.floediameter[m] Meltpondcoverage[%] Typicalponddiameter[m] Maximumponddiameter[m Dirtyiceconcentration[%] Leadwidth[m] Leadfloes,diameter[m] Typicalridgeheight[m] Max.ridgeheight[m] Typicalridgespacing[m] Ridges:New=0,Old=1,Both=2 Rubblefields,coverage[%] Icebergs,Numberof

11:00 POLARSTERN got stuck several times

16:00 despite high ice concentration we make good progress

18:00 just reached next Dredge station, preparing a broken ice field for Dredge transit 21:00 on station, new ice formation

23:00 on station

Hour Port Ahead Starboard

8:00

9:00

11:00

- 94

-13.9.2001

Hour Port Ahead Starboard

12:00

-23:00

- 96

-Data and color images are available via

http://www.awi-bremerhaven.de/Modelling/SEAICE/icereport/index.html

- 97

-TimeUTC Latitude[◦N] Longitude[◦E] TrueWindspeed[m/s] TrueWinddirection[◦] AirTemperature[◦C] Shipspeed[kn] NumberofEngines Operationmode:channel=0, lead=1,floeice=3,ramming=4 Totaliceconcentration[%] Cthinice<30cm[%] Typicalseaicethickness[m] Snowthickness[cm] Typicalfloediameter[m] Max.floediameter[m] Meltpondcoverage[%] Typicalponddiameter[m] Maximumponddiameter[m Dirtyiceconcentration[%] Leadwidth[m] Leadfloes,diameter[m] Typicalridgeheight[m] Max.ridgeheight[m] Typicalridgespacing[m] Ridges:New=0,Old=1,Both=2 Rubblefields,coverage[%] Icebergs,Numberof 21:00 new ice formation 23:00 fog

Hour Port Ahead Starboard

2:00

3:00

6:00

- 98

-14.9.2001

Hour Port Ahead Starboard

14:00

15:00

16:00

- 99

-TimeUTC Latitude[◦N] Longitude[◦E] TrueWindspeed[m/s] TrueWinddirection[◦] AirTemperature[◦C] Shipspeed[kn] NumberofEngines Operationmode:channel=0, lead=1,floeice=3,ramming=4 Totaliceconcentration[%] Cthinice<30cm[%] Typicalseaicethickness[m] Snowthickness[cm] Typicalfloediameter[m] Max.floediameter[m] Meltpondcoverage[%] Typicalponddiameter[m] Maximumponddiameter[m Dirtyiceconcentration[%] Leadwidth[m] Leadfloes,diameter[m] Typicalridgeheight[m] Max.ridgeheight[m] Typicalridgespacing[m] Ridges:New=0,Old=1,Both=2 Rubblefields,coverage[%] Icebergs,Numberof

15:00 got stuck, ice thickness estimated from broken ice around the ship

16:00 still ramming through two big floes>2km diam. with big fresh ridge inbetween 17:00 stuck again, ramming

21:00 on station

23:00 on station, fog, poor visibility, new ice formation

Hour Port Ahead Starboard

4:00

8:00

13:00

- 100

-15.9.2001

Hour Port Ahead Starboard

14:00

15:00

17:00

- 101

16:00 due to todays rain surface appears grey, and more ponds are visible than before 19:00 good visibility; ahaed photo shows brush broken for dredging

Hour Port Ahead Starboard

2:00

3:00

5:00

- 102

-16.9.2001

Hour Port Ahead Starboard

8:00

17:00

19:00

- 103

16:00 melt ponds snow covered, good visibility

17:00 some big icebergs>100m diam., some impressive linear new and old ridges 19:00 just reached Dredge position, making a path

20:00 still looking for Dredge position 23:00 on station

Hour Port Ahead Starboard

10:00

17:00

18:00

- 104

-17.9.2001

Hour Port Ahead Starboard

19:00

20:00

23:00

- 105

-TimeUTC Latitude[◦N] Longitude[◦E] TrueWindspeed[m/s] TrueWinddirection[◦] AirTemperature[◦C] Shipspeed[kn] NumberofEngines Operationmode:channel=0, lead=1,floeice=3,ramming=4 Totaliceconcentration[%] Cthinice<30cm[%] Typicalseaicethickness[m] Snowthickness[cm] Typicalfloediameter[m] Max.floediameter[m] Meltpondcoverage[%] Typicalponddiameter[m] Maximumponddiameter[m Dirtyiceconcentration[%] Leadwidth[m] Leadfloes,diameter[m] Typicalridgeheight[m] Max.ridgeheight[m] Typicalridgespacing[m] Ridges:New=0,Old=1,Both=2 Rubblefields,coverage[%] Icebergs,Numberof 1:00 new ice formation in leads

15:00 poor visibility, snowfall, new ice forming in lead, on station 17:00 poor visibility, snowfall, new ice forming in lead, on station

18:00 very foggy, ramming between two big floes, ponds well visible by their white snow cover in contrast to greyish bare ice surface, bigger ponds are snow free 21:00 heavy snowfall, dark

23:00 heavy snowfall, bad visibility

Hour Port Ahead Starboard

11:00

15:00

- 106

-Data and color images are available via

http://www.awi-bremerhaven.de/Modelling/SEAICE/icereport/index.html

- 107

1:00 heavy snowfall, bad visibility 4:00 poor visibility, snowfall 5:00 poor visibility, snowfall

12:00 preparing for Dredge station, most ponds covered with new snow, no more visible 13:00 on station

15:00 on station 16:00 on station

18:00 most ponds covered by new snow, thick, favourable ice condition for steaming 19:00 getting dark, melt ponds covered with snow, not possible to see them, snow drift 23:00 ponds are fresh snow covered

Hour Port Ahead Starboard

4:00

5:00

11:00

- 108

-19.9.2001

Hour Port Ahead Starboard

13:00

19:00

- 109

1:00 ponds are fresh snow covered 11:00 on station

12:00 most ponds are snow covered, snow windblown and accumulated in prominent snow drifts 20:00 steaming 2 miles to next Dredge station, floes freshly snow covered =>no meltponds visible

Hour Port Ahead Starboard

11:00

12:00

13:00

- 110

-20.9.2001

Hour Port Ahead Starboard

15:00

- 111

10:00 on station, quite heavily ridged floes around, although station floe was so flat 12:00 on station, lead frozen over with thin ice

18:00 mixture of flat and heavily deformed floes 20:00 preparing way for Dredge in a field of loose ice floes

Hour Port Ahead Starboard

4:00

12:00

13:00

- 112

-21.9.2001

Hour Port Ahead Starboard

14:00

- 113

-23.9.2001

TimeUTC Latitude[◦N] Longitude[◦E] TrueWindspeed[m/s] TrueWinddirection[◦] AirTemperature[◦C] Shipspeed[kn] NumberofEngines Operationmode:channel=0, lead=1,floeice=3,ramming=4 Totaliceconcentration[%] Cthinice<30cm[%] Typicalseaicethickness[m] Snowthickness[cm] Typicalfloediameter[m] Max.floediameter[m] Meltpondcoverage[%] Typicalponddiameter[m] Maximumponddiameter[m] Dirtyiceconcentration[%] Leadwidth[m] Leadfloes,diameter[m] Typicalridgeheight[m] Max.ridgeheight[m] Typicalridgespacing[m] Ridges:New=0,Old=1,Both=2 Rubblefields,coverage[%] Icebergs,Numberof

0 85.78 21.68 2.9 285 -8.8 4.7 3 4 99 15 1.5 5 200 1000 3 5 15 50 5 1 2 150 2

19:00 lots of algae on ice underside

No images.

- 115

4:00 poor visibility 5:00 poor visibility, snowfall

12:00 new ice hard to distinguish due to new snow 17:00 on station

19:00 on station

23:00 approaching station, poor visibility

Hour Port Ahead Starboard

12:00

13:00

16:00

- 116

-Data and color images are available via

http://www.awi-bremerhaven.de/Modelling/SEAICE/icereport/index.html

- 117

4:00 poor visibility

5:00 stuck due to bad ice condition, poor visibility 7:00 stuck due to bad ice condition, poor visibility

12:00 stuck in the ice at same position; white out conditions; strong drift to W 18:00 ramming since 1h at same position; dark and foggy

23:00 it is dark, bad visibility, it is difficult to estimate ice floes parameters

No images.

- 118

Im Dokument Sea ice conditions in the Transpolar Drift in August/September 2001 (Seite 21-121)