1,182 research outputs found

    Total Lightning Observations within Electrified Snowfall using Polarimetric Radar, LMA, and NLDN Measurements

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    Four electrified snowfall cases are examined using total lightning measurements from lightning mapping arrays (LMAs), and the National Lightning Detection Network (NLDN) from Huntsville, AL and Washington D.C. In each of these events, electrical activity was in conjunction with heavy snowfall rates, sometimes exceeding 5-8 cm hr-1. A combination of LMA, and NLDN data also indicate that many of these flashes initiated from tall communications towers and traveled over large horizontal distances. During events near Huntsville, AL, the Advanced Radar for Meteorological and Operational Research (ARMOR) C-band polarimetric radar was collecting range height indicators (RHIs) through regions of heavy snowfall. The combination of ARMOR polarimetric radar and VHF LMA observations suggested contiguous layer changes in height between sloping aggregate-dominated layers and horizontally-oriented crystals. These layers may have provided ideal conditions for the development of extensive regions of charge and resultant horizontal propagation of the lightning flashes over large distances

    @Brunning: People & Technology: At the Only Edge that Means Anything / How We Understand What We Do

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    Somerset's Peatland Archaeology

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    The Somerset Levels and Moors are part of a series of coastal floodplains that fringe both sides of the Severn Estuary. These areas have similar Holocene environmental histories and contain a wealth of waterlogged archaeological landscapes and discrete monuments. The importance of Somerset's prehistoric wetland heritage is shown by the fact that twenty-five percent of all the prehistoric waterlogged sites thought still to exist in England are from the Somerset moors, the County Museum in Taunton Castle holds the largest collection of conserved prehistoric worked wood in the UK, possibly in the whole of Europe, the Sweet Track (the oldest known wooden trackway in the UK) and Glastonbury Lake Village have produced the most complete record of Neolithic and Iron Age material culture in the UK and Glastonbury Lake Village was the best preserved prehistoric settlement ever discovered in the UK. This substantial monograph presents the results of the MARISP project ( Monuments at Risk in Somerset Peatlands) which thoroughly assessed the condition of the wetland monuments and the ongoing threats to their survival and aimed to answer key research questions about the sites through the use of minimally invasive excavation and to inform the development of future national and county wetland strategies

    ATG Interviews Michael Cairns

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    @Brunning: People & Technology

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    ATG Interviews Marilyn Johnson

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    Letter from John H. Brunning to [Louie] Muir, [ca. 1902 Aug 13].

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    Family Letters862 Henry St - Oakland Calif.Mrs Muir.Dear Madam,Inclosed find check amt 187 50 / 100 Dollars in payment. for Interest from Feb 13/02 to Aug 13/02. Please acknowlege Recipt of same and oblige Yours trulyJohn H. Brunning0620
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