Helen Ockenden
YOU?
Author Swipe
View article: New insights into Hydrology and Lake Dynamics Upstream of Thwaites Glacier
New insights into Hydrology and Lake Dynamics Upstream of Thwaites Glacier Open
Understanding Antarctic subglacial hydrology is crucial for assessing ice sheet dynamics and their contributions to global sea-level rise. Subglacial water modulates basal friction, influencing ice flow and glacier stability, as shown in s…
View article: Mapping subglacial Antarctica using satellite observations of the ice surface
Mapping subglacial Antarctica using satellite observations of the ice surface Open
The ice-covered landscape of subglacial Antarctica is a crucial basal boundary condition for understanding the continental response to climate forcing, but is the least well mapped land surface in the inner solar system. Most current maps …
View article: Neural network emulators of high resolution melt processes under Antarctic ice shelves
Neural network emulators of high resolution melt processes under Antarctic ice shelves Open
To make accurate projections of future sea level rise, small-scale ice-sheet and ice-shelf processes must be included in global climate models. Since high-resolution fully-coupled ice-sheet--ocean models are computationally expensive, mult…
View article: Antarctic subglacial topography mapped from space reveals complex mesoscale landscape dynamics
Antarctic subglacial topography mapped from space reveals complex mesoscale landscape dynamics Open
The landscape shrouded by Antarctica’s ice sheet provides important insights into its history and influences the ice response to climate forcing, yet much of this critical basal boundary remains poorly understood. With ice-penetrating-rada…
View article: Comment on tc-2023-94
Comment on tc-2023-94 Open
Abstract. Landscapes buried beneath the Antarctic Ice Sheet preserve information about the geologic and geomorphic evolution of the continent both before and during the wide-scale glaciation that began roughly 34 million years ago. Through…
View article: Ice-flow perturbation analysis: a method to estimate ice-sheet bed topography and conditions from surface datasets
Ice-flow perturbation analysis: a method to estimate ice-sheet bed topography and conditions from surface datasets Open
One of the largest contributors to uncertainty in predictions of sea-level rise from ice-sheet models is a lack of knowledge about the bed topography beneath ice sheets. Bed topography maps are normally made by interpolating between linear…
View article: Ice-Flow Perturbation Analysis: A method to estimate ice-sheet bed topography and conditions from surface datasets (data)
Ice-Flow Perturbation Analysis: A method to estimate ice-sheet bed topography and conditions from surface datasets (data) Open
This dataset accompanies the paper 'Ice-Flow Perturbation Analysis: A method to estimate ice-sheet bed topography and conditions from surface datasets' in Journal of Glaciology, and can be used alongside the provided code to reproduce the …
View article: Ice-Flow Perturbation Analysis: A method to estimate ice-sheet bed topography and conditions from surface datasets (data)
Ice-Flow Perturbation Analysis: A method to estimate ice-sheet bed topography and conditions from surface datasets (data) Open
This dataset accompanies the paper 'Ice-Flow Perturbation Analysis: A method to estimate ice-sheet bed topography and conditions from surface datasets' in Journal of Glaciology, and can be used alongside the provided code to reproduce the …
View article: Inverting ice surface elevation and velocity for bed topography and slipperiness beneath Thwaites Glacier
Inverting ice surface elevation and velocity for bed topography and slipperiness beneath Thwaites Glacier Open
There is significant uncertainty over how ice sheets and glaciers will respond to rising global temperatures. Limited knowledge of the topography and rheology of the ice–bed interface is a key cause of this uncertainty as models show that …
View article: What can high resolution ice surface observations tell us about the bed topography of Pine Island Glacier, West Antarctica? 
What can high resolution ice surface observations tell us about the bed topography of Pine Island Glacier, West Antarctica?  Open
<p><span>The West Antarctic Ice Sheet has the potential to contribute up to 3m of sea level rise over the next few centuries. There is considerable uncertainty over the rate at which ice loss will occur, caused in part by a lac…
View article: Reply on RC1
Reply on RC1 Open
There is significant uncertainty over how ice sheets and glaciers will respond to rising global temperatures. Limited knowledge of the topography and rheology of ice-bed interface is a key cause of this uncertainty, as models show that sma…
View article: Reply on RC2
Reply on RC2 Open
Abstract. There is significant uncertainty over how ice sheets and glaciers will respond to rising global temperatures. Limited knowledge of the topography and rheology of ice-bed interface is a key cause of this uncertainty, as models sho…
View article: Comment on tc-2021-287
Comment on tc-2021-287 Open
Abstract. There is significant uncertainty over how ice sheets and glaciers will respond to rising global temperatures. Limited knowledge of the topography and rheology of the iceâbed interface is a key cause of this uncertainty as model…
View article: Comment on tc-2021-287
Comment on tc-2021-287 Open
Abstract. There is significant uncertainty over how ice sheets and glaciers will respond to rising global temperatures. Limited knowledge of the topography and rheology of the iceâbed interface is a key cause of this uncertainty as model…
View article: Comment on tc-2021-274
Comment on tc-2021-274 Open
Abstract. Determining the future evolution of the Antarctic Ice Sheet is critical for understanding and narrowing the large existing uncertainties in century-scale global mean sea-level-rise (SLR) projections. One of the most significant g…
View article: Inverting ice surface elevation and velocity for bed topography and slipperiness beneath Thwaites Glacier
Inverting ice surface elevation and velocity for bed topography and slipperiness beneath Thwaites Glacier Open
There is significant uncertainty over how ice sheets and glaciers will respond to rising global temperatures. Limited knowledge of the topography and rheology of ice-bed interface is a key cause of this uncertainty, as models show that sma…
View article: Supplementary material to "Inverting ice surface elevation and velocity for bed topography and slipperiness beneath Thwaites Glacier"
Supplementary material to "Inverting ice surface elevation and velocity for bed topography and slipperiness beneath Thwaites Glacier" Open
S1 Non
View article: Model output from Inverting ice surface elevation and velocity for bed topography and slipperiness beneath Thwaites Glacier
Model output from Inverting ice surface elevation and velocity for bed topography and slipperiness beneath Thwaites Glacier Open
This model output dataset accompanies the draft paper 'Inverting ice surface elevation and velocity for bed topography and slipperiness beneath Thwaites Glacier'.
View article: Model output from Inverting ice surface elevation and velocity for bed topography and slipperiness beneath Thwaites Glacier
Model output from Inverting ice surface elevation and velocity for bed topography and slipperiness beneath Thwaites Glacier Open
This model output dataset accompanies the draft paper 'Inverting ice surface elevation and velocity for bed topography and slipperiness beneath Thwaites Glacier'.
View article: Inverting surface-elevation data and velocity for basal topography beneath Thwaites Glacier, West Antarctica
Inverting surface-elevation data and velocity for basal topography beneath Thwaites Glacier, West Antarctica Open
<p>Thwaites Glacier in West Antarctica is one of the regions of the fastest accelerating ice thinning and highest observed ice loss. The topography of the bed beneath the glacier is a key control of future ice loss, but is not curren…