computer model – Page 3 – Shamskm: A site to exchange knowledge and solutions

Scientists Discover New Site of Potential Instability in West Antarctic Ice Sheet

By Guest PostMay 12, 2012Environmentaircraft, Antarctica, austin, basin, british antarctic survey, computer model, don blankenship, duncan young, filchner ronne ice shelf, ice penetrating radar, ice sheet change, martin siegert, new jersey, pine island glacier, sea level, sub glacial basin, thwaites glacier, university of edinburgh, university of texas, wais, warmer ocean, weddell sea, west antarctic ice sheet

AUSTIN, Texas — Using ice-penetrating radar instruments flown on aircraft, a team of scientists from the U.S. and U.K. have uncovered a previously unknown sub-glacial basin nearly the size of New Jersey beneath the West Antarctic Ice Sheet (WAIS) near the Weddell Sea. The location, shape and texture of the mile-deep basin suggest that this region of the ice sheet is at a greater risk of collapse than previously thought.

Team members at The University of Texas at Austin compared data about the newly discovered basin to data they previously collected from other parts of the WAIS that also appear highly vulnerable, including Pine Island Glacier and Thwaites Glacier. Although the amount of ice stored in the new basin is less than the ice stored in previously studied areas, it might be closer to a tipping point. (more…)

New U-M Computer Model Predicts Cholera Outbreaks Up To 11 Months in Advance

By Guest PostJanuary 23, 2012Environment, Scienceaaron king, annual monsoon flooding, attack rates, bacterium, Bangladesh, capital city, cholera cases, cholera outbreaks, climate change, climate factors, climate sensitive urban core, climate variability, computer model, cycles of cholera, dhaka, diarrheal disease, disease transmission, ecology, el niño southern oscillation, enso episode, fecal oral diseases, mercedes pascual, michael emch, mohammad yunus, pathogen, post monsoon, prediction, risk factors, robert reiner, sanitary conditions, space and time, spatial location, university of michigan, urban periphery, vaccination, vibrio cholera, warning system

ANN ARBOR, Mich.— A new University of Michigan computer model of disease transmission in space and time can predict cholera outbreaks in Bangladesh up to 11 months in advance, providing an early warning system that could help public health officials there.

The new forecast model applies specifically to the capital city of Dhaka and incorporates data on both year-to-year climate variability and the spatial location of cholera cases at the district level. This allowed the researchers to study both local variation in disease transmission and response to climate factors within the megacity of 14 million people. (more…)

Probes Suggest Magnetic Bubbles at Solar System Edge

By Guest PostJune 13, 2011Scienceboston university, boundary region, computer model, earth, energetic particles, galactic cosmic rays, Galaxy, heliophysics system observatory, jim drake, magnetic field, merav opher, milky way galaxy, NASA, north pole, solar system, south pole, Space, turbulent sea of magnetic bubbles, university of maryland, voyager data, voyager spacecraft

PASADENA, Calif. –– Observations from NASA’s Voyager spacecraft, humanity’s farthest deep space sentinels, suggest the edge of our solar system may not be smooth, but filled with a turbulent sea of magnetic bubbles.

While using a new computer model to analyze Voyager data, scientists found the sun’s distant magnetic field is made up of bubbles approximately 100 million miles (160 million kilometers) wide. The bubbles are created when magnetic field lines reorganize. The new model suggests the field lines are broken up into self-contained structures disconnected from the solar magnetic field. The findings are described in the June 9 edition of the Astrophysical Journal. (more…)

Just Four Percent of Galaxies Have Neighbors Like the Milky Way

By Guest PostMay 26, 2011Scienceanalyses of data, big bang, cdm, cold dark matter theory, computer model, formation of our galaxy, Galaxy, luminosity, magellanic clouds, Milky Way, nigel sharp, optical sky, risa wechsler, sdss, stanford university, universe

*Our home galaxy belongs to a rare subset among the billions that populate the cosmos*

How unique is the Milky Way?

To find out, a group of researchers led by Stanford University astrophysicist Risa Wechsler compared the Milky Way to similar galaxies and found that just four percent are like the galaxy Earth calls home. (more…)

Optimizing Climate Change Reduction

By Guest PostSeptember 18, 20101 commentEnvironment, Scienceaerosols, carnegie institution, carnegie institution for science, carnegie researchers, climate, computer model, earth climate, geoengineering ideas, george ban-weiss, global climate model, global ecology, global sunshade, global temperature, hydrological cycle, ken caldeira, runoff, solar radiation, stratosphere, sulfate, tropical regions, warming planet

Palo Alto, CA — Scientists at the Carnegie Institution’s Department of Global Ecology have taken a new approach on examining a proposal to fix the warming planet. So-called geoengineering ideas—large-scale projects to change the Earth’s climate—have included erecting giant mirrors in space to reflect solar radiation, injecting aerosols of sulfate into the stratosphere making a global sunshade, and much more. Past modeling of the sulfate idea looked at how the stratospheric aerosols might affect Earth’s climate and chemistry.

(more…)

Tag Archives: computer model

Scientists Discover New Site of Potential Instability in West Antarctic Ice Sheet

New U-M Computer Model Predicts Cholera Outbreaks Up To 11 Months in Advance

Probes Suggest Magnetic Bubbles at Solar System Edge

Just Four Percent of Galaxies Have Neighbors Like the Milky Way

Optimizing Climate Change Reduction