Next Article in Journal
Permafrost-Landscape Map of the Republic of Sakha (Yakutia) on a Scale 1:1,500,000
Previous Article in Journal
Geometric Versus Anemometric Surface Roughness for a Shallow Accumulating Snowpack
Previous Article in Special Issue
Present Glaciers of Tavan Bogd Massif in the Altai Mountains, Central Asia, and Their Changes since the Little Ice Age

Modeling Dry-Snow Densification without Abrupt Transition

Scott Polar Research Institute, Lensfield Road, Cambridge CB2 1ER, UK
Geosciences 2018, 8(12), 464;
Received: 23 October 2018 / Revised: 1 December 2018 / Accepted: 3 December 2018 / Published: 7 December 2018
(This article belongs to the Special Issue Remote Sensing of Land Ice)
An empirical model for the densification of dry snow has been calibrated using strain-rate data from Pine Island Glacier basin, Antarctica. The model provides for a smooth transition between Stage 1 and Stage 2 densification, and leads to an analytical expression for density as a function of depth. It introduces two new parameters with a simple physical basis: transition density ρ T and a scaling factor, M, which controls the extent of the transition zone. The standard (Herron and Langway) parameterization is used for strain rates away from the transition zone. Calibration, though tentative, produces best parameter values of ρ T = 580 kg m 3 and M = 7 for the region. Using these values, the transition model produces better simulations of snow profiles from Pine Island Glacier basin than the well-established Herron and Langway and Ligtenberg models, both of which postulate abrupt transition. Simulation of density profiles from other sites using M = 7 produces the best values of ρ T = 550 kg m 3 for a high accumulation site and 530 kg m 3 for a low accumulation site, suggesting that transition density may vary with climatic conditions. The variation of bubble close-off depth and depth-integrated porosity with mean annual accumulation predicted by the transition model is similar to that predicted by the Simonsen model tuned for Greenland. View Full-Text
Keywords: snow models; densification snow models; densification
Show Figures

Figure 1

MDPI and ACS Style

Morris, E. Modeling Dry-Snow Densification without Abrupt Transition. Geosciences 2018, 8, 464.

AMA Style

Morris E. Modeling Dry-Snow Densification without Abrupt Transition. Geosciences. 2018; 8(12):464.

Chicago/Turabian Style

Morris, Elizabeth. 2018. "Modeling Dry-Snow Densification without Abrupt Transition" Geosciences 8, no. 12: 464.

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Back to TopTop