Publications de Katherine Colby Leonard

Exploring the coupled ocean and atmosphere system with a data science approach applied to observations from the Antarctic Circumnavigation Expedition

Katherine Colby Leonard, Robin Lewis Modini, Jenny Thomas, Fernando Perez Cruz, Julia Schmale, Christel Sybille Hassler, Irina Gorodetskaya, Sebastian Johannes Heinz-Josef Landwehr, Andrea Baccarini, Alireza Moallemi

The Southern Ocean is a critical component of Earth's climate system, but its remoteness makes it challenging to develop a holistic understanding of its processes from the small scale to the large scale. As a result, our knowledge of this vast region remai ...

2021

Spatially distributed simulations of the effect of snow on mass balance and flooding of Antarctic sea ice

Katherine Colby Leonard

Southern Ocean sea ice can exhibit widespread flooding and subsequent snow-ice formation, due to relatively thick snow covers compared to the total ice thickness. Considerable subkilometer scale variability in snow and ice thickness causes poorly constrain ...

CAMBRIDGE UNIV PRESS2021

Version 1 of a sea ice module for the physics-based, detailed, multi-layer SNOWPACK model

Michael Lehning, Nander Wever, Katherine Colby Leonard

Sea ice is an important component of the global climate system. The presence of a snowpack covering sea ice can strongly modify the thermodynamic behavior of the sea ice, due to the low thermal conductivity and high albedo of snow. The snowpack can be stra ...

COPERNICUS GESELLSCHAFT MBH2020

Changes in snow distribution and surface topography following a snowstorm on Antarctic sea ice

Michael Lehning, Ernesto Trujillo Gomez, Katherine Colby Leonard

Snow distribution over sea ice is an important control on sea ice physical and biological processes. We combine measurements of the atmospheric boundary layer and blowing snow on an Antarctic sea ice floe with terrestrial laser scanning to characterize a t ...

Wiley-Blackwell2016

A locally calibrated, late glacial Be-10 production rate from a low-latitude, high-altitude site in the Peruvian Andes

Katherine Colby Leonard

Well-dated records of tropical glacier fluctuations are essential for developing hypotheses and testing proposed mechanisms for past climate changes. Since organic material for radiocarbon dating is typically scarce in low-latitude, high-altitude environme ...

Elsevier Sci Ltd2015

Sea ice physics during ANT-XXIX/6

Nander Wever, Katherine Colby Leonard

P. Lemke, editor.2014

Beyond Point Measurements: Sea Ice Floes Characterized in 3-D

Ernesto Trujillo Gomez, Katherine Colby Leonard

A new methodology for coincident floe-scale measurements of the surface elevation, snow depth, and ice draft (the thickness below the water line) of Antarctic sea ice has been demonstrated during two recent research voyages: the Australian-led Sea Ice Phys ...

2013

Spatio-Temporal Surface Shear-Stress Variability in Live Plant Canopies and Cube Arrays

Michael Lehning, Benjamin Andreas Walter, Katherine Colby Leonard

This study presents spatiotemporally-resolved measurements of surface shear-stress tau (s) in live plant canopies and rigid wooden cube arrays to identify the sheltering capability against sediment erosion of these different roughness elements. Live plants ...

Springer Netherlands2011

Drifting snow threshold measurements near McMurdo station, Antarctica: A sensor comparison study

Katherine Colby Leonard

We present the results of an Antarctic spring field study of snow drift threshold measurements made using two custom drift sensors and a commercial parts-counting device. All three sensor types worked well at detecting drifting snow events, but the sensors ...

Elsevier2012

The influence of winds, sea-surface temperature and precipitation anomalies on Antarctic regional sea-ice conditions during IPY 2007

Katherine Colby Leonard

The 2007 International Polar Year (IPY) in the Antarctic was distinguished by strong regional and seasonal ice-atmosphere-ocean anomalies associated with an overall weakening of the prevailing westerly circulation. Here we assess the ice-atmosphere-ocean c ...

2011

The importance of wind-blown snow redistribution to snow accumulation on Bellingshausen Sea ice

Katherine Colby Leonard

2011

Measurements of surface shear stress distribution in real plant canopies

Michael Lehning, Benjamin Andreas Walter, Katherine Colby Leonard

2011