Influence of channelling on heating in ice-sheet flows

first_imgIce‐sheet flows can be channelled by perturbations in the basal topography or in the sliding coefficient. These lead to spatial variation in the steady profile, the flux and the dissipative heating. This paper examines the linearized theory of heating variations, showing that the map plane aspect ratio of the basal perturbation has a dominating effect on the qualitative behaviour. For ribbing transverse to the direction of flow, maximum heating occurs over bedrock and sliding viscosity highs. When flow‐parallel channelling occurs maximum heating occurs over bedrock lows and sliding viscosity lows. These results are used to examine symmetry‐breaking behaviour of numerical thermoviscous ice‐sheet models in terms of a dissipation‐driven creep instability.last_img

How consumers approach the many ways to pay

People want to pay their own way – and in their own time. That’s evident in the wide variety of options consumers use to manage their payments. Whether they use mobile or online bill pay, person-to-person (P2P) payments or even the occasional check, people want payment options that seamlessly fit how they live and work.Expectations & Experiences: Consumer Payments, the most recent quarterly consumer trends survey by Fiserv, found continuing shifts in mobile and online bill pay and other digital payment options. The survey, conducted by Harris Poll among 3,031 banking consumers in the U.S., highlights several trends.Digital Options Create OpportunityAdoption of online and mobile banking seem to be entry points to other digital services, including bill payment. As adoption and use of online and mobile banking increases, bill payments in those channels are expected to see corresponding gains. Seventy-four percent of online banking users take advantage of online bill pay, and 65 percent of mobile bankers use mobile bill pay. continue reading » 16SHARESShareShareSharePrintMailGooglePinterestDiggRedditStumbleuponDeliciousBufferTumblr read more