Sentences with phrase «atmospheric measurements]»

Van Ommen says a pressure system that lies between Antarctica and Australia may be the lynchpin for this atmospheric see - saw.

There are no peer - reviewed studies that show atmospheric levels of CO2 lower than the 400 - ppm mark, he said.

Whether or not farmers agree about the causes or even existence of climate change, researchers agree that farmers still have to prepare their farms for the consequences of rising temperatures, increased atmospheric CO2 and more extreme weather events.

«This will eventually lead to a greater prevalence of blue - green algae called cyanobacteria which fix atmospheric nitrogen,» he added.

We can determine the radiative forcing associated with the long - lived greenhouse gases fairly precisely, because we know their atmospheric concentrations, their spatial distribution and the physics of their interaction with radiation.

Enhanced levels of atmospheric carbon dioxide are a likely key driver of global dryland greening, according to a paper published in the journal Scientific Reports.

Global change research encompasses a wide variety of study areas, including atmospheric sciences, ecology, global carbon cycles, climatology, and terrestrial processes.

The new research, published today in the journal Geophysical Research Letters, explains that this atmospheric loss is driven by a polar wind powered by an interaction between sunlight, the solar magnetic field and the molecules present in the upper atmosphere.

The GISS's James Hansen argues that atmospheric concentrations must be brought back to 350 ppm or lower — quickly.

Scicchitano described the warning as a scientific product based on work climate scientists did on the ocean - atmospheric phenomenon known as La Niña, finding that it would affect rainfall most severely in the Horn of Africa.

At a Feb. 7 hearing of Juliana, et al v. United States of America, et al — a case a group of kids, young adults and environmentalists brought in 2015 against the U.S. government — Frank Volpe said he didn't know whether carbon dioxide levels had reached 400 parts per million, a measurement of atmospheric concentration.

They found similar proportions of lead in atmospheric mineral dust samples collected in Switzerland.

«Minerals from Papua New Guinea hold secret for recycling of noble gases: Scientists find atmospheric gases trapped in minerals that are crystallized in Earth's mantle.»

This will reveal both the signatures of atmospheric ingredients such as water, methane, and carbon dioxide, and also how heat flows from the planet's dayside to its nightside.

GREENHOUSE GASSED In a long - running field experiment in Minnesota, scientists are studying the effects of rising atmospheric carbon dioxide levels on plots of grassland.

It was proof that our home planet isn't alone in atmospheric spectacle.

The challenge may arise from the models» inability to adequately represent the atmospheric heating associated with changes in cloud populations.

Transits can reveal atmospheres because as a planet passes in front of its star, atmospheric gases can absorb certain frequencies of the light passing through.

Here, Earth's gravity is too weak for atmospheric gases to linger, but the absolute emptiness of outer space has not yet quite begun.

MAVEN carries a suite of instruments that have been measuring Mars» atmospheric loss since November 2014.

The meteorites, which blasted from the surface of other worlds before landing on Earth, are kept in cabinets pumped full of nitrogen at above - atmospheric pressures to help prevent material from entering the sealed environments.

To date, the team has located around 6,500 of the estimated 10,000 films created during atmospheric testing.

Graduate students, faculty and professionals in the field of earth and atmospheric sciences and their applications form a cohort that tackles hands - on exercises, hears from dozens of prominent experts and forges strong professional networking connections.

So Palumbo and her colleagues ran the model with various plausible atmospheric thicknesses and extra amounts of greenhouse warming.

Because more charged particles would be created, there also would be more sputtering, another form of atmospheric loss.

«With this simulator, we can explain in great detail to the operational weather community [weather forecasters] the tornadic echo from polarimetric radar,» says Robert Palmer, an atmospheric scientist at the University of Oklahoma (OU) and co-author of the paper.

It is true that atmospheric science is complex and climate models are imperfect.

Combined with a decrease in atmospheric water vapor and a weaker sun due to the most recent solar cycle, the aerosol finding may explain why climate change has not been accelerating as fast as it did in the 1990s.

The U.S. conducted 210 atmospheric nuclear tests between 1945 and 1962, with multiple cameras capturing each event at around 2,400 frames per second.

«Clouds are one of the major feedbacks in cooling and heating the surface» of the ice, said Nate Miller, an atmospheric science graduate student at the University of Wisconsin, Madison.

It's a center for research on everything from particle physics and astronomy to atmospheric chemistry.

Aaron Kennedy, an assistant atmospheric sciences professor, recently encountered an atmosphere unlike anything he normally finds in his field work on the prevalence of extreme weather patterns around the world: the halls of Congress.

Today the difference is 28 degrees Celsius, indicating that polar regions are more sensitive to increases in atmospheric carbon dioxide than the tropics.

To see if these regulations affected bromine concentrations, atmospheric chemist Stephen Montzka of the National Oceanic and Atmospheric Administration in Boulder, Colorado, and colleagues analyzed air samples taken several times each month from 10 land - based sites across the globe between 1995 and 2002.

When Douglas MacMartin of the California Institute of Technology in Pasadena approached the National Science Foundation for support on a modeling effort on [albedo modification], officials told him the work was too theoretical for the engineering division and too applied for the atmospheric science program.

«Despite stronger solar wind and EUV - radiation levels under the early Sun, ion escape can not explain more than 0.006 bar of atmospheric pressure lost over the course of 3.9 billion years,» says Robin Ramstad.

«Boundaries for a Healthy Planet,» by atmospheric scientist Jonathan Foley, explains the safe thresholds for environmental processes that profoundly affect sustainability.

Venus's climate, like Earth's, has varied over time - the result of newly appreciated connections between geologic activity and atmospheric change

Damon Matthews of Concordia University in Montreal, Canada, and his colleagues calculated national contributions to warming by weighting each type of emission according to the atmospheric lifetime of the temperature change it causes.

The planet is conveniently close, and an extreme laboratory for atmospheric processes familiar on Earth.

The US model performed on average as well as, or better than, the European model when using the full suite of atmospheric data from the ECMWF.

After all, lightning is just a rush of electrons leading to an electric spark on an atmospheric scale — any atmosphere.

Amazonian grasses, sometimes called macrophytes, convert atmospheric carbon to plant biomass, which is then processed by aquatic microorganisms upon decomposition.

Taken together, Palumbo says, the results offer a potential means of reconciling the geological evidence for flowing water on early Mars with the atmospheric evidence for a cold and icy planet.

Using this data, they can produce two - dimensional global maps of atmospheric phenomena, such as plasma plumes.

To figure out how to look for actual proof of extrasolar lightning, Helling combined Drift's code with another atmospheric model called Phoenix, created by astrophysicists at the University of Hamburg.

In addition to the isotope concentration, the air bubbles trapped in the ice cores allow for measurement of the atmospheric concentrations of trace gases, including greenhouse gases carbon dioxide, methane, and nitrous oxide.

They plan to examine data from other instruments on MAVEN to see if escaping particles map to the same regions where they see reconnected magnetic fields to confirm that reconnection is contributing to Martian atmospheric loss and determine how significant it is.

Each extinction was in some way associated with drastic changes in the planet's atmospheric CO2 levels.

That cranks up the amount of energy available to fuel the processes responsible for atmospheric escape.