نتایج جستجو برای: refreezing

تعداد نتایج: 178  

2014
Benjamin Crouzet David W. Parker Raghhuvar Pathak

Purpose – The purpose of this paper is to cite resistance to change as a significant reason why productivity initiatives fail. Therefore, effectively managing and overcoming resistance to change is a critical factor for the successful outcome of any intervention. This paper explores current knowledge of resistance to change and seeks to review the literature and so understand what methods can b...

2010
L. S. Kuchment V. N. Demidov

A technique of using satellite-derived data for constructing continuous snow characteristics fields for distributed snowmelt runoff simulation is presented. The satellite-derived data and the available ground-based meteorological measurements are incorporated in a physically based snowpack model. The snowpack model describes temporal changes of the snow depth, density and water equivalent (SWE)...

2015
S. de la Peña I. M. Howat P. W. Nienow M. R. van den Broeke E. Mosley-Thompson S. F. Price D. Mair B. Noël A. J. Sole

Atmospheric warming over the Greenland Ice Sheet during the last 2 decades has increased the amount of surface meltwater production, resulting in the migration of melt and percolation regimes to higher altitudes and an increase in the amount of ice content from refrozen meltwater found in the firn above the superimposed ice zone. Here we present field and airborne radar observations of buried i...

Journal: :IEEE Trans. Geoscience and Remote Sensing 2000
Andrew W. Bingham Mark Drinkwater

Time series, satellite microwave data are used to monitor and quantify changes in the scattering properties of the Antarctic ice sheet. Daily ERS scatterometer (EScat) and Special Sensor Microwave/Imager (SSM/I) image data, acquired since 1992, are analyzed to understand the seasonal and interannual changes over the ice sheet. For regions of the ice sheet where azimuthal modulation is negligibl...

Journal: :Frontiers in Marine Science 2023

Water mass transformation (WMT) around the Antarctic margin controls Antarctica Bottom formation and abyssal limb of global meridional overturning circulation, besides mediating ocean-ice shelf exchange, ice sheet stability its contribution to sea level rise. However, mechanisms controlling rate WMT in are poorly understood due lack observations inability climate models simulate those mechanism...

Journal: :Elementa 2023

Sea-ice ridges constitute a large fraction of the ice volume in Arctic Ocean, yet we know little about evolution these masses. Here examine thermal and morphological an first-year sea-ice ridge, from its formation to advanced melt. Initially mean keel depth was 5.6 m sail height 0.7 m. The initial rubble macroporosity (fraction seawater filled voids) estimated at 29% drilling 43%–46% buoy tempe...

Journal: :Geoderma 2021

• 14 frozen soil thermal conductivity (FSTC) algorithms in land surface models were reviewed. These FSTC evaluated with measurements at temperature ≤−4 °C. The Becker 1992 algorithm performed the based on measured FSTC. incorporated into SHAW model for evaluation. No perform well, average bias ranging from −2.2 to 2.8 °C and −0.08 0.1 cm 3 −3 . Frozen (FSTC, λ eff ) is a critical thermophysical...

Journal: :Frontiers in Earth Science 2022

The energy and mass balance of mountain glaciers translate into volume changes that play out as area over time. From this, together with former moraines during maximum advances, information on past climate conditions the climatic drivers behind glacier advances can be obtained. Here, we use distributed COupled Snowpack Ice surface model in PYthon (COSIPY) to simulate present state an Italian gl...

2009
Paolo Gabrielli Frederic Planchon Carlo Barbante Claude F. Boutron Jean Robert Petit Sergey Bulat Sungmin Hong Giulio Cozzi Paolo Cescon

This paper reports the first rare earth element (REE) concentrations in accreted ice refrozen from sub-glacial Lake Vostok (East Antarctica). REE were determined in various sections of the Vostok ice core in order to geochemically characterize its impurities. Samples were obtained from accreted ice and, for comparison, from the upper glacier ice of atmospheric origin (undisturbed, disturbed and...

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