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Littlest Continent Had Biggest Role in Sea Level Drop

By Guest PostAugust 22, 2013Environmentargo global array, atmospheric patterns, australia, climate experiment, earth, german aerospace center, grace, gravity recovery, john fasullo, la niña, littlest continent, NASA, ncar, poseidon, satellite altimeters, sea level drop, smallest continent, spacecraft, topex

A unique and complex set of circumstances came together over Australia from 2010 to 2011 to cause Earth’s smallest continent to be the biggest contributor to the observed drop in global sea level rise during that time, finds a new study co-authored and co-funded by NASA.

In 2011, scientists at NASA’s Jet Propulsion Laboratory in Pasadena, Calif., and the University of Colorado at Boulder reported that between early 2010 and summer 2011, global sea level fell sharply, by about a quarter of an inch, or half a centimeter. Using data from the NASA/German Aerospace Center’s Gravity Recovery and Climate Experiment (GRACE) spacecraft, they showed that the drop was caused by the very strong La Nina that began in late 2010. That La Nina changed rainfall patterns all over our planet, moving huge amounts of Earth’s water from the ocean to the continents. The phenomenon was short-lived, however. (more…)

Cutting Specific Atmospheric Pollutants Would Slow Sea Level Rise

By Guest PostApril 25, 2013Environmentaixue hu, amsterdam, anjuli bamzai, atmospheric pollutants, black carbon, boulder, carbon dioxide, carbon dioxide emissions, claudia tebaldi, climate central, climate change, computer model, effect, geochemistry, greenhouse gases, heat trapping pollutants, hydrofluorocarbons, important factor, melting ice, methane, miami, mumbai, NASA, national science foundation, ncar, new york, noaa, rising oceans, san diego, scientist, sea-level rise, sio, soot in exhaust, this century, tokyo, tropospheric ozone, us epa, veerabhadran ramanathan, yangyang x

Decreasing emissions of black carbon, methane and other pollutants makes a difference

With coastal areas bracing for rising sea levels, new research indicates that cutting emissions of certain pollutants can greatly slow sea level rise this century.

Scientists found that reductions in four pollutants that cycle comparatively quickly through the atmosphere could temporarily forestall the rate of sea level rise by roughly 25 to 50 percent.

The researchers focused on emissions of four heat-trapping pollutants: methane, tropospheric ozone, hydrofluorocarbons and black carbon. (more…)

Tiny Cloud Droplets

By Guest PostOctober 12, 2012Sciencebulk buoyancy, climate, cloud droplets, cloud microphysics, cloud turbulence, computational research, delaware, dynamics, fine scale, fluid mechanic, formation, global climate, global scales, inertial effect, inertial particle, instrumentation, lian ping wang, ncar, parameterization, rain formation, regional, regional weather, sedimentation, simulation, tiny, tool, university, water cycle, water droplets, weather, wojciech grabowski

UD’s Wang contributes invited paper on cloud microphysics

Lian-Ping Wang, professor of mechanical engineering and joint professor of physical ocean science and engineering at the University of Delaware, recently published an invited critical review paper in the 2013 volume of the Annual Review of Fluid Mechanics, a high impact journal for the fluid mechanics community.

Co-authored with Wojciech Grabowski, a senior scientist from the National Center for Atmospheric Research (NCAR), the paper, titled “Growth of Cloud Droplets in a Turbulent Environment,” addresses a classic cloud physics problem of how cloud turbulence affects the growth of tiny cloud droplets. (more…)

China Olympics Traffic Measures Cut Carbon Emissions

By Guest PostJuly 31, 2012Environment2008 summer olympics, Beijing, bike, carbon emission, china olympic, climate change, emission, greenhouse gas, helen worden, lex ivey, london olympics, mopitt, motor vehicle, NASA, ncar, pollution control, threat, traffic, traffic restriction, university of toronto, university of tsinghua

A new NASA-funded study of the impacts of China’s traffic restrictions for the 2008 Summer Olympics in Beijing shows how widespread changes in transportation patterns could greatly reduce the threat of climate change.

New research by an international team of scientists led by the National Center for Atmospheric Research (NCAR), Boulder, Colo., indicates that China’s restrictions on motor vehicles designed to improve air quality during the games had the side benefit of dramatically cutting emissions of carbon dioxide by between 26,500 and 106,000 U.S. tons (24,000 and 96,000 metric tons) during the event. (more…)

Deep Oceans May Mask Global Warming for Years at a Time

By Guest PostSeptember 22, 2011Environmentatlantic, climate system, community climate system model, computer simulations of global climate, coupled model intercomparison project phase 5, earth, el niño, eric deweaver, gerald meehl, global air temperatures, greenhouse gas, ice and snow, john fasullo, kevin trenberth, la niña, missing heat, national center for atmospheric research, ncar, oceanic circulation, rate of global warming, software tool, temperature, tropical pacific, warming the upper ocean

*Computer simulations of global climate lead to new conclusions*

Earth’s deep oceans may absorb enough heat at times to flatten the rate of global warming for periods of as long as a decade–even in the midst of longer-term warming. This according to a new analysis led by scientists at the National Center for Atmospheric Research (NCAR).

The study, based on computer simulations of global climate, points to ocean layers deeper than 1,000 feet as the main location of the “missing heat” during periods such as the past decade when global air temperatures showed little trend. (more…)

Air Quality Worsened by Paved Surfaces

By Guest PostJune 11, 2011Environmentair pollution, atmospheric measurements, brad smull, china meteorological administration, coastal cities, computer simulations, emissions, fei chen, ground-level ozone, Houston, houston area, Japan, land and sea temperatures, los angeles, national center for atmospheric research, national science foundation, ncar, nsf, pavement, petrochemical facilities, pollutants, sea, shanghai, smog, traffic jams, unhealthy air, united states, university of tsukuba, urban areas on air pollution, urban development, urbanization, warm summer weather, weather patterns, wind patterns

*Widespread urban development alters weather patterns*

New research focusing on the Houston area suggests that widespread urban development alters weather patterns in a way that can make it easier for pollutants to accumulate during warm summer weather instead of being blown out to sea.

The international study, led by the National Center for Atmospheric Research (NCAR), could have implications for the air quality of fast-growing coastal cities in the United States and other mid-latitude regions overseas. (more…)

Parting The Waters: Computer Modeling Applies Physics to Red Sea Escape Route

By Guest PostSeptember 22, 2010Sciencealexei androsov, animation, Bible, biblical account, biblical account of the red sea parting, carl drews, coastal lagoon, computer modeling, cu, divine miracle, exodus, fluid dynamics, mediterranean sea, miracles, moses, mud flats, nathan paldor, national center for atmospheric research, naum voltzinger, ncar, nile delta, parting of the red sea, pharaoh, suez canal, tsunami, university of colorado at boulder, waters, wind setdown

The biblical account of the parting of the Red Sea has inspired and mystified people for millennia. A new computer modeling study by researchers at the National Center for Atmospheric Research (NCAR) and the University of Colorado at Boulder (CU) shows how the movement of wind as described in the book of Exodus could have parted the waters.

(more…)

Global Model Confirms: Cool Roofs Can Offset Carbon Dioxide Emissions and Mitigate Global Warming

By Guest PostJuly 20, 20101 commentEnvironment, Scienceberkeley lab, carbon dioxide, carbon emissions, climate change, cool roof, cool the world, curb, doe, emissions, evaporation, goddard space flight center, hashem akbari, keith oleson, light-colored rooftops, model, NASA, ncar, radiation, steven chu, surabi menon, Technology, temperature, topography, urban heat

Can light-colored rooftops and roads really curb carbon emissions and combat global climate change?

The idea has been around for years, but now, a new study by researchers at Lawrence Berkeley National Laboratory that is the first to use a global model to study the question has found that implementing cool roofs and cool pavements in cities around the world can not only help cities stay cooler, they can also cool the world, with the potential of canceling the heating effect of up to two years of worldwide carbon dioxide emissions.

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