Michael Durand

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Chronic exposure to hydrogen sulfide (H(2)S) in the parts per billion-parts per million range occurs in the population of Rotorua, a city built upon an actively degassing geothermal field in the Taupo Volcanic Zone, New Zealand. H(2)S is acutely toxic at high concentrations but little is understood of the health effects of chronic, low-level exposure. In(More)
| The elevation of the ocean surface has been measured for over two decades from spaceborne altimeters. However, existing altimeter measurements are not adequate to characterize the dynamic variations of most inland water bodies, nor of ocean eddies at scales of less than about 100 km, notwithstanding that such eddies play a key role in ocean circulation(More)
The Surface Water and Ocean Topography (SWOT) mission is a swath mapping radar interferometer that would provide new measurements of inland water surface elevation (WSE) for rivers, lakes, wetlands, and reservoirs. SWOT WSE estimates would provide a source of information for characterizing streamflow globally and would complement existing in situ gage(More)
[1] A season-long, multiscale, multifrequency radiometric data assimilation experiment is performed to test the feasibility of snow water equivalent (SWE) estimation. Synthetic passive microwave (PM) observations at Advanced Microwave Scanning Radiometer-Earth Observing System frequencies and 25 km resolution and synthetic near infrared (NIR) narrowband(More)
A microwave radiance assimilation (RA) scheme for the retrieval of snow physical state variables requires a snowpack physical model (SM) coupled to a radiative transfer model. In order to assimilate microwave brightness temperatures (Tbs) at horizontal polarization (h-pol), an SM capable of resolving melt–refreeze crusts is required. To date, it has not(More)
Department of Civil, Environmental, and Geodetic Engineering, The Ohio State University, Columbus, OH 43210, USA b School of Earth Sciences, The Ohio State University, Columbus, OH 43210, USA Byrd Polar Research Center, The Ohio State University, Columbus, OH 43210, USA Department of Civil and Environmental Engineering, University of Washington, Seattle, WA(More)
Characterization of surface water storage changes in Arctic lakes using simulated SWOT measurements Hyongki Leeab; Michael Durandb; Hahn Chul Jungab; Doug Alsdorfab; C. K. Shumab; Yongwei Shengc a Division of Geodetic Science, School of Earth Sciences, The Ohio State University, Columbus, OH, USA b Byrd Polar Research Center, The Ohio State University,(More)
[1] The proposed Surface Water and Ocean Topography (SWOT) mission would provide measurements of water surface elevation (WSE) for characterization of storage change and discharge. River channel bathymetry is a significant source of uncertainty in estimating discharge from WSE measurements, however. In this paper, we demonstrate an ensemble-based data(More)
The emission of toxic gases from the soil is a hazard in geothermal regions that are also urbanized because buildings constructed on geothermal ground may be subject to the ingress of gases from the soil directly into the structure. The Rotorua geothermal field, New Zealand, is extensively urbanized but to date no studies have evaluated the extent of the(More)