Howat, Ian M; Ahn, Yushin; Joughin, Ian; van den Broeke, Michiel R; Lenaerts, Jan T M; Smith, Ben E (2011): (Table S1) Flux gate discharge and centerline discharge of Helheim, Kangerdlugssuaq and Jakobshavn glacier, Greenland [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.811483, Supplement to: Howat, IM et al. (2011): Mass balance of Greenland's three largest outlet glaciers, 2000-2010. Geophysical Research Letters, 38(12), L12501, https://doi.org/10.1029/2011GL047565
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Abstract:
Acceleration of Greenland's three largest outlet glaciers, Helheim, Kangerdlugssuaq and Jakobshavn Isbræ, accounted for a substantial portion of the ice sheet's mass loss over the past decade. Rapid changes in their discharge, however, make their cumulative mass-change uncertain. We derive monthly mass balance rates and cumulative balance from discharge and surface mass balance (SMB) rates for these glaciers from 2000 through 2010. Despite the dramatic changes observed at Helheim, the glacier gained mass over the period, due primarily to the short duration of acceleration and a likely longer-term positive balance. In contrast, Jakobshavn Isbræ lost an equivalent of over 11 times the average annual SMB and loss continues to accelerate. Kangerdlugssuaq lost over 7 times its annual average SMB, but loss has returned to the 2000 rate. These differences point to contrasts in the long-term evolution of these glaciers and the danger in basing predictions on extrapolations of recent changes.
Project(s):
Coverage:
Median Latitude: 68.063467 * Median Longitude: -40.339033 * South-bound Latitude: 66.366100 * West-bound Longitude: -49.783600 * North-bound Latitude: 69.171400 * East-bound Longitude: -33.038000
Date/Time Start: 2000-01-01T00:00:00 * Date/Time End: 2010-01-01T00:00:00
Event(s):
Helheim_glacier * Latitude: 66.366100 * Longitude: -38.195500 * Location: Sermilik Fjord, SE Greenland * Method/Device: Multiple investigations (MULT)
Jakobshavn_Isbrae * Latitude: 69.171400 * Longitude: -49.783600 * Location: West Greenland * Method/Device: Multiple investigations (MULT)
Kangerdlugssuaq_gl * Latitude: 68.652900 * Longitude: -33.038000 * Location: East Greenland * Method/Device: Multiple investigations (MULT)
Comment:
Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Glacier | Glacier | Howat, Ian M | |||
| 3 | DATE/TIME | Date/Time | Geocode | |||
| 4 | Glacier discharge | Glac dis | 1012 kg/a | Howat, Ian M | ||
| 5 | Error, absolute | Error a | ± | Howat, Ian M | 1 sigma | |
| 6 | Glacier mass, flux | Glac mass flux | 1012 kg/km/a | Howat, Ian M | centerline discharge | |
| 7 | Glacier width | Glac w | km | Howat, Ian M | ||
| 8 | - | - | Howat, Ian M | residual between discharge and centerline-scaled discharge [Gt/a] |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
90 data points
Data
| 1 Event | 2 Glacier | 3 Date/Time | 4 Glac dis [1012 kg/a] | 5 Error a [±] | 6 Glac mass flux [1012 kg/km/a] | 7 Glac w [km] | 8 - |
|---|---|---|---|---|---|---|---|
| Helheim_glacier | Helheim | 2000 | 24.2 | 2.6 | 4.6 | 5.3 | -0.9 |
| Helheim_glacier | Helheim | 2005 | 37.0 | 3.0 | 7.5 | 4.9 | 0.9 |
| Helheim_glacier | Helheim | 2010 | 25.4 | 2.6 | 5.1 | 5.0 | 0.4 |
| Kangerdlugssuaq_gl | Kangerdlugssuaq | 2000 | 23.6 | 3.1 | 6.0 | 3.9 | -0.9 |
| Kangerdlugssuaq_gl | Kangerdlugssuaq | 2005 | 40.7 | 3.2 | 11.1 | 3.7 | 1.3 |
| Kangerdlugssuaq_gl | Kangerdlugssuaq | 2010 | 30.6 | 2.9 | 8.1 | 3.8 | 0.2 |
| Jakobshavn_Isbrae | Jakobshavn South Branch | 2000 | 29.4 | 3.6 | 8.5 | 3.5 | -1.4 |
| Jakobshavn_Isbrae | Jakobshavn South Branch | 2005 | 32.7 | 3.6 | 9.5 | 3.4 | -1.4 |
| Jakobshavn_Isbrae | Jakobshavn South Branch | 2010 | 32.8 | 3.4 | 11.0 | 3.0 | 3.4 |
| Jakobshavn_Isbrae | Jakobshavn Ice Rumple | 2000 | 8.6 | 2.5 | 1.3 | 6.6 | -0.8 |
| Jakobshavn_Isbrae | Jakobshavn Ice Rumple | 2005 | 9.6 | 2.5 | 1.5 | 6.4 | -0.6 |
| Jakobshavn_Isbrae | Jakobshavn Ice Rumple | 2010 | 9.8 | 2.5 | 2.0 | 4.9 | 2.1 |
| Jakobshavn_Isbrae | Jakobshavn North Branch | 2000 | 6.7 | 1.5 | 0.8 | 8.4 | -0.6 |
| Jakobshavn_Isbrae | Jakobshavn North Branch | 2005 | 8.6 | 1.7 | 1.1 | 7.8 | -0.2 |
| Jakobshavn_Isbrae | Jakobshavn North Branch | 2010 | 9.5 | 1.8 | 1.4 | 6.8 | 1.2 |