Antarctic and Greenland Drainage Systems

Table 1. ICESat/GLAS campaigns used to generate the Greenland DEM
CampaignStart DateEnd date
12003 Feb 2 2003 Mar 29
2a2003 Sep 25 2003 Nov 19
2b2004 Feb 17 2004 Mar 21
2c2004 May 18 2004 Jun 21
3a2004 Oct 3 2004 Nov 8
3b2005 Feb 17 2005 Mar 24
3c2005 May 20 2005 Jun 23
Table 2. Projection and vector map information
ProjectionPolar-stereographic, grid nodes at the centers of the cells
EllipsoidTopex/Poseidon (REq=6378.136300 km, Eccentricity=0.08181922146) (The elevation grids available at NSIDC have elevations relative to the WGS-84 ellipsoid and EGM96 geoid although the node locations are still based on the Topex/Poseidon polar-stereographic grid. We used our original version, with elevations based on the T/P ellipsoid.)
GreenlandAntarctica
Standard Latitude 70° N 70° S
Orientation Line from North Pole along 315°E runs vertically down in the grid Line from the South Pole along 0° runs vertically upward in the grid
DEM resolution 1 km in each direction (nominal)500 m in each direction (nominal)
Vector map resolution 1 km in each direction (nominal)1 km in each direction (nominal)
Vector map scale 16.9 cm = 50 km14.5 cm = 50 km
Table 3. Antarctic drainage divide boundary statistics
 Full drainage systemGrounded part
Drainage System Number of points in boundary Average spacing (m)Total length (km)Area (km2)Number of points in boundaryAverage spacing (m)Total length (km)Area (km2)Length of grounding line (km)
135575119425778329081595927519 5014484521
22826919555389337544309612956008300001343
351028114584816156087227590656615657271303
43649810638933293314240510142932478792548
52355412329082381762671611230161909781334
65386010858536933285727610158126107973199
7546201106024501239665999865544935933604
836631802958159742366318029581597421545
91590113721851663352373411527311460291401
10431491285533943263427821054521919041 154
11228621262901273145289051093178257286 957
12438041285649773999615278753697222243065
13458891336106112654266193106707411097713302
144239113557347263595207512364437109533688
152442013733571337554328210043301251833533
1628133152428227166631160136426726524316278
17518451578155210006971753146105218523823852
182372217441454118352990413239622697761350
192288215936544810614410910446003820181826
20422121144821255065572749655172018533937
21223941272847228632352709132232174041237
2226262112296022031733304993324214497 769
2326205118310612968939470873450 912662423
243548613347212134152196513229081608481445
25317281564970 35398429191195110 346213549
26200811713448102575460241125191 430853824
27119211461745 6944440758753080 541462300

Table 4. Greenland drainage divide boundary statistics
Drainage Subsystem Number of points in boundaryAverage spacing (m)Total length (km) Area (km2)Length of grounding line (km)
1.1171141342296131115 776
1.2107572102264 637731137
1.393972192062 461521128
1.483131331105 17536 357
2.12797011131042742201037
2.219343871684 51196 437
3.11877123744411480903183
3.265534552985 356192661
3.3161021151854 73232 876
4.1165401222019 646691016
4.2113261081226 46802 451
4.384261961651 333261077
5.072463202322497381832
6.175751841396 49909 743
6.21801214225521369021209
7.119210761452 95213 54
7.2183491122059130027 786
8.12338112028032415561126
8.285802922504 334971907

For further information contact Jack Saba