Sun Feb 09, F. Flechtner
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Mottram, Ruth, B. Simonsen, Sebastian, Høyer Svendsen, Synne, Barletta, Valentina R., Sandberg Sørensen, Louise, Nagler, Thomas, Wuite, Jan, Groh, Andreas, Horwath, Martin, Rosier, Job, Solgaard, Anne, Hvidberg, Christine S., and Forsberg, Rene, 2019. An Integrated View of Greenland Ice Sheet Mass Changes Based on Models and Satellite Observations. Remote Sensing, 11(12):1407, doi:10.3390/rs11121407.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2019RemS...11.1407M,
author = {{Mottram}, Ruth and {B. Simonsen}, Sebastian and {H{\o}yer Svendsen}, Synne and {Barletta}, Valentina R. and {Sandberg S{\o}rensen}, Louise and {Nagler}, Thomas and {Wuite}, Jan and {Groh}, Andreas and {Horwath}, Martin and {Rosier}, Job and {Solgaard}, Anne and {Hvidberg}, Christine S. and {Forsberg}, Rene},
title = "{An Integrated View of Greenland Ice Sheet Mass Changes Based on Models and Satellite Observations}",
journal = {Remote Sensing},
keywords = {Climate Change Initiative (CCI), Greenland ice sheet, mass budget, cryosphere, sea level rise, altimetry, mass balance, ice sheet modelling},
year = 2019,
month = jun,
volume = {11},
number = {12},
eid = {1407},
pages = {1407},
abstract = "{The Greenland ice sheet is a major contributor to sea level rise, adding
on average 0.47 {\ensuremath{\pm}} 0.23 mm year-1 to global mean
sea level between 1991 and 2015. The cryosphere as a whole has
contributed around 45\% of observed global sea level rise since
1993. Understanding the present-day state of the Greenland ice
sheet is therefore vital for understanding the processes
controlling the modern-day rates of sea level change and for
making projections of sea level rise into the future. Here, we
provide an overview of the current state of the mass budget of
Greenland based on a diverse range of remote sensing
observations to produce the essential climate variables (ECVs)
of ice velocity, surface elevation change, grounding line
location, calving front location, and gravimetric mass balance
as well as numerical modelling that together build a consistent
picture of a shrinking ice sheet. We also combine these
observations with output from a regional climate model and from
an ice sheet model to gain insight into existing biases in ice
sheet dynamics and surface mass balance processes. Observations
show surface lowering across virtually all regions of the ice
sheet and at some locations up to -2.65 m year-1 between 1995
and 2017 based on radar altimetry analysis. In addition, calving
fronts at 28 study sites, representing a sample of typical
glaciers, have retreated all around Greenland since the 1990s
and in only two out of 28 study locations have they remained
stable. During the same period, two of five floating ice shelves
have collapsed while the locations of grounding lines at the
remaining three floating ice shelves have remained stable over
the observation period. In a detailed case study with a fracture
model at Petermann glacier, we demonstrate the potential
sensitivity of these floating ice shelves to future warming.
GRACE gravimetrically-derived mass balance (GMB) data shows that
overall Greenland has lost 255 {\ensuremath{\pm}} 15 Gt year-1
of ice over the period 2003 to 2016, consistent with that shown
by IMBIE and a marked increase compared to a rate of loss of 83
{\ensuremath{\pm}} 63 Gt year-1 in the 1993-2003 period.
Regional climate model and ice sheet model simulations show that
surface mass processes dominate the Greenland ice sheet mass
budget over most of the interior. However, in areas of high ice
velocity there is a significant contribution to mass loss by ice
dynamical processes. Marked differences between models and
observations indicate that not all processes are captured
accurately within models, indicating areas for future research.}",
doi = {10.3390/rs11121407},
adsurl = {https://ui.adsabs.harvard.edu/abs/2019RemS...11.1407M},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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