We present the design and first results from two experiments using a wireless subglacial sensor system (WiSe) that is able to transmit data through 2500 m thick ice. Energy consumption of the probes is minimized, enabling the transmission of data for at least 10 years. In July 2010 the first prototype of the system was used to measure subglacial pressure at the base and a temperature profile consisting of 23 probes in two 600 m deep holes at Russell Glacier, a land-terminating part of the West Greenland ice sheet near Kangerlussuaq. The time series of subglacial pressure show very good agreement between data from the WiSe system and the wired reference system. The wireless-measured temperature data were validated by comparison with the theoretical decrease of melting point with water pressure inside the water-filled hole directly after installation. To test the depth range of the WiSe system a second experiment using three different probe types and two different surface antennas was performed inside the 2537 m deep hole at NEEM. It is demonstrated that, with the proper combination of transmission power and surface antenna type, the WiSe system transmits data through 2500 m thick ice.
The top renewable energy integrator in the northeast United States, Alteris Renewables, Inc., has introduced new financing options available to homeowners throughout the region that offer solar power systems with no money down. As the first renewable energy integrator to offer residential customers in Vermont and eight other states the opportunity to install high quality solar power systems with no money down, Alteris is committed to bringing reliable, sustainable power to the masses.According to the U.S. Energy Information Administration (USEIA), while solar energy use is on the rise in the United States, it still makes up only 1% of total energy produced. Cost is often cited as one of the key reasons U.S. consumers are resistant to embracing renewable energy. ‘It is more affordable than ever for homeowners to go green with solar power,’ said Ron French, President of Alteris Renewables, ‘By having finance options that allow residential customers to take advantage of state and federal incentives without a significant cash outlay, we are eliminating cost as a hurdle for homeowners looking to reduce their carbon footprint and their dependence on fossil fuels.’Mr. French points out that the company passionately believes that expanding the use of clean and renewable energy will help build our economy, and create a better, more sustainable lifestyle for us all. “Imagine how significant the impact will be as more homeowners embrace clean energy. If less than one percent of the homes in Alteris’ home market took advantage of the Zero Down Solar programs to install solar systems, it would be the equivalent of planting more than 135 million trees.’Source: Alteris Renewables, Inc. Montpelier, VT, September 21, 2010 Alteris Renewables is the largest design-build renewable energy company in the Northeast, with more than 25 megawatts installed for over 3,000 customers over the past 30 years and more than a dozen offices across seven states, including two in Vermont. Alteris provides solar electric (photovoltaic or PV), solar thermal, and wind energy solutions for commercial, residential, education, government and institutional clients. The company has industry-leading expertise in engineering, design, project management, performance analysis, project financing and renewable energy credit programs. For more information visit: www.alterisinc.com(link is external)
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