Abstract. The generation, transport, storage and drainage of meltwater play important roles in the Greenland Ice Sheet (GrIS) subglacial system. Active lakes, common features Antarctica, have recently been detected beneath GrIS may impact ice sheet hydrology. Despite their potential importance, few repeat lake filling events identified Greenland. Here we examine surface elevation change a colla...

Thrust faulting has been suggested as a viable mechanism of debris transport at many glaciers, often inferred from the presence up-glacier dipping bands that emerge ice surface to form ridges basally derived material. However, modelling indicates development thrust faults is mechanically inhibited because stresses are much lower than required for shear failure, prerequisite faulting, and field ...

Abstract. Conversion of altimetry-derived ice-sheet volume change to mass requires an understanding the evolution combined ice and air content within firn column. In absence suitable techniques observe changes column across entirety sheet, processes are typically modeled. Here, we present new simulations over Greenland Antarctic sheets (GrIS AIS) using Community Firn Model atmospheric reanalysi...

Abstract Freezing rain and ice pellets are particularly difficult to forecast when solid precipitation is completely melted aloft. This study addresses this issue by investigating the processes that led a long-duration pellet event in Montreal, Québec, Canada, on 11–12 January 2020. To do so, benchmark model initialized with ERA5 data used show was below melting layer, which discards partial fr...

Abstract. Antarctic surface mass balance (SMB) is largely determined by precipitation over the continent and subject to regional climate variability related Southern Annular Mode (SAM) other climatic drivers at large scale. Locally however, firn snowpack processes are important in determining SMB total of Antarctica global sea level. Here, we examine factors that influence attempt reconcile out...

Surface crevasses on the Greenland Ice Sheet (GrIS) capture nearly half of seasonal runoff, yet their role in transferring meltwater to bed has received little attention relative that supraglacial lakes and moulins. Here, we present observations crevasse ponding investigate controls hydrological behavior at a fast-moving, marine-terminating sector GrIS. We map surface meltwater, crevasses, surf...

Within the context of developing data inversion and assimilation techniques for C-band backscatter over sea ice, snow physical models may be used to drive backscatter models for comparison and optimization with satellite observations. Such modeling has the potential to enhance understanding of snow on sea-ice properties required for unambiguous interpretation of active microwave imagery. An end...

To investigate the stability of glucagon-like peptide 1 (GLP-1) and glucagon in plasma under short- and long-term storage conditions. Pooled human plasma (n=20), to which a dipeptidyl peptidase 4 (DPP4) inhibitor and aprotinin were added, was spiked with synthetic GLP-1 (intact, 7-36NH2 as well as the primary metabolite, GLP-1 9-36NH2) or glucagon. Peptide recoveries were measured in samples ke...

[1] This paper addresses the effects of canopy physical processes on snow mass and energy balances in boreal ecosystems. We incorporate new parameterizations of radiation transfer through the vegetation canopy, interception of snow by the vegetation canopy, and under-canopy sensible heat transfer processes into the Versatile Integrator of Surface and Atmosphere (VISA) and test the model results...

A soil-vegetation-atmosphere transfer model coupled with a macroscale distributed hydrological model was used to simulate the water cycle for a large region in Bulgaria. To do so, an atmospheric forcing was built for two hydrological years (1 October 1995 to 30 September 1997), at an eight km resolution. The impact of the human activities on the rivers (especially hydropower or irrigation) was ...