Ibcao Bathymetry Data

holland 2007

Emodnet Dataset ID (LID)

0000044703

id

10338

Dataset name

holland 2007

File name

20230927/holland-2007-3996.xyz

Data format

xyz (tsv)

File size

15151

Dataset version

3

Seabed source ID (SID)

1492

Seabed data category (TID)

Isolated sounding — depth value that is not part of a regular survey or trackline (code 13)

Included in IBCAO gridding

Yes (code 1)

IBCAO gridding layer weight

1

Cruise ID

0

Cruise report

https://doi.org/10.1038/ngeo316

Chief scientist

Holland, David M.

Start date

2007-07-01

End date

2007-08-31

Date format

Only date, no time (code Y-m-d)

Originator centre

National Science Foundation

Data provider

University of California Irvine Department of Earth System Science

Spatial reference system

EPSG:3996

Horizontal resolution

3721.01

Abstract

Observations over the past decades show a rapid acceleration of several outlet glaciers in Greenland and Antarctica. One of the largest changes is a sudden switch of Jakobshavn Isbræ, a large outlet glacier feeding a deep-ocean fjord on Greenland’s west coast, from slow thickening to rapid thinning in 1997, associated with a doubling in glacier velocity. Suggested explanations for the speed-up of Jakobshavn Isbræ include increased lubrication of the ice–bedrock interface as more meltwater has drained to the glacier bed during recent warmer summers and weakening and break-up of the floating ice tongue that buttressed the glacier. In this study we present hydrographic data that show a sudden increase in subsurface ocean temperature in 1997 along the entire west coast of Greenland, suggesting that the changes in Jakobshavn Isbræ were instead triggered by the arrival of relatively warm water originating from the Irminger Sea near Iceland. We trace these oceanic changes back to changes in the atmospheric circulation in the North Atlantic region. We conclude that the prediction of future rapid dynamic responses of other outlet glaciers to climate change will require an improved understanding of the effect of changes in regional ocean and atmosphere circulation on the delivery of warm subsurface waters to the periphery of the ice sheets.

URL

https://www.nature.com/articles/ngeo316

Operator who enters this information

marcus

File creation time

2023-09-27 10:53:12+00

Metadata modification time

2023-09-27 12:11:38.55648+00

Bounding box

POLYGON((-1977024.50252382 -2139393.45774146,-1977024.50252382 -1366355.47557082,-1580915.3996691 -1366355.47557082,-1580915.3996691 -2139393.45774146,-1977024.50252382 -2139393.45774146))

Color

#882ed2

preprocess

https://git.bolin.su.se/rez/seabed2030-preprocess/-/blob/master/bedmachine_new_sources.py

Ibcao data status

finalising

Processing status

Final check, otherwise done.

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