spatial resolution – Shamskm: A site to exchange knowledge and solutions

Monitoring Hurricanes: Georgia Tech Engineers Assist NASA with Instrument for Remotely Measuring Storm Intensity

By Guest PostDecember 14, 2012Environment, Scienceairborne system, analog beam former, aperture, array antenna, data, electromagnetic energy, electromagnetic radiation, fan beams, flight center, georgia, gigahertz range, glenn hopkins, global hawk, gtri, high winds, hirad, hurricane imaging radiometer, in the system, innovation research, jim maloney, knowledge, marshall, massachusetts, michigan, microwave, microwave radiation, minimizing noise, NASA, next generation system, noaa, numerical modeling, ocean waves, orbit, pacific frontal system, polarized array, project, prosensing, radiometer, rain rate, research institute, satellite, sbir, sea foam, sensitivity, small business, Space, spatial resolution, storm, surface wind speeds, synthetic, tech, timothy miller, university, wind direction

A device designed by engineers at the Georgia Tech Research Institute (GTRI) is part of the Hurricane Imaging Radiometer (HIRAD), an experimental airborne system developed by the Earth Science Office at the NASA Marshall Space Flight Center in Alabama.

Known as an analog beam-former, the GTRI device is part of the radiometer, which is being tested by NASA on a Global Hawk unmanned aerial vehicle. The radiometer measures microwave radiation emitted by the sea foam that is produced when high winds blow across ocean waves. By measuring the electromagnetic radiation, scientists can remotely assess surface wind speeds at multiple locations within the hurricanes. (more…)

UA Climate Scientists Put Predictions to the Test

By Guest PostSeptember 18, 2012Environmentaerosol, arizona, atmosphere, climate, climate change, climate model, climate scientist, climate variability, cloud, criteria, deforestation, earth system, emission, fossil fuel, global temperature, greenhouse gas, hindcast, ipcc, koichi sakaguchi, michael brunke, model, ocean current, particle, precipitation, prediction, solar activity, spatial resolution, surface, surface moisture, university, urbanization, volcanic eruption, weather forecaster, xubin zeng

A new study has found that climate-prediction models are good at predicting long-term climate patterns on a global scale but lose their edge when applied to time frames shorter than three decades and on sub-continental scales.

Climate-prediction models show skills in forecasting climate trends over time spans of greater than 30 years and at the geographical scale of continents, but they deteriorate when applied to shorter time frames and smaller geographical regions, a new study has found.

Published in the Journal of Geophysical Research-Atmospheres, the study is one of the first to systematically address a longstanding, fundamental question asked not only by climate scientists and weather forecasters, but the public as well: How good are Earth system models at predicting the surface air temperature trend at different geographical and time scales? (more…)

NASA Map Sees Earth’s Trees in a New Light

By Guest PostFebruary 19, 2012Environment, Scienceaustralia, caltech, carbon, carbon cycle, climate change, cloud, data, earth, effects of topography, eucalyptus, flowering plants, forest, forest canopy, forest habitat, global map of forest height, height, high resolution map, icesat, laser pulse measurements, lidar, light detection and ranging, marc simard, modis, monitor, NASA, new zealand, satellites, south latitude, southern tropical forests, Space, spatial modeling, spatial resolution, trmm sensors, vegetation, worldclim database

PASADENA, Calif. – A NASA-led science team has created an accurate, high-resolution map of the height of Earth’s forests. The map will help scientists better understand the role forests play in climate change and how their heights influence wildlife habitats within them, while also helping them quantify the carbon stored in Earth’s vegetation.

Scientists from NASA’s Jet Propulsion Laboratory, Pasadena, Calif.; the University of Maryland, College Park; and Woods Hole Research Center, Falmouth, Mass., created the map using 2.5 million carefully screened, globally distributed laser pulse measurements from space. The light detection and ranging (lidar) data were collected in 2005 by the Geoscience Laser Altimeter System instrument on NASA’s Ice, Cloud and land Elevation Satellite (ICESat). (more…)

Tag Archives: spatial resolution

Monitoring Hurricanes: Georgia Tech Engineers Assist NASA with Instrument for Remotely Measuring Storm Intensity

UA Climate Scientists Put Predictions to the Test

NASA Map Sees Earth’s Trees in a New Light