Sentences with phrase «atmospheric chemist»
An atmospheric chemist is a scientist who studies the chemicals present in the Earth's atmosphere. They analyze the composition of gases and particles, as well as their effects on climate, air quality, and the environment. They help us understand how chemicals in the air can impact our health and the planet's overall well-being. Full definition
The production of the gas is nearly doubling every year, says Michael Prather, atmospheric chemist at University of California, Irvine, who had predicted earlier this year that emissions would likely exceed the industry's claim that only 2 percent of the gas is released into the atmosphere.
scientificamerican.com
The concept of the «Anthropocene» was originally suggested by Paul Crutzen, a Nobel Prize winning atmospheric chemist who is also part of the «Anthropocene Working Group,» in the year 2000.
«It's a great paper because it surprises us,» says atmospheric chemist Michael Prather at the University of California, Irvine.
This strange claim can be traced back to informal musings a decade ago by atmospheric chemist Paul Crutzen.
When Nobel Prize winning atmospheric chemist Paul Crutzen coined the term «the Anthropocene» in the year 2000, he was expressing his frustration at the inability of his fellow scientists to see that human activity has changed the Earth System, not just on its surface, but in fundamental ways.
But it has largely escaped the attention of atmospheric chemists until recently that the present generation of jumbo jets is flying higher than ever to capitalise on the lower fuel costs that come from cruising in thinner air.
This is the idea behind the Anthropocene, a new epoch in Earth history proposed by the Nobel Prize - winning atmospheric chemist Paul Crutzen just 15 years ago.
It is a statement worthy of Gertrude Stein, but University of Washington atmospheric chemist Dan Jaffe says it with conviction: None of the contamination we pump into the air just disappears.
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.
In the back of the plane, atmospheric chemist Kimberly Prather wears headphones to muffle the roar of the propellers.
Although chlorine levels are falling, thanks to agreements that banned chlorofluorocarbons, levels of bromine — which is 45 times more effective at zapping ozone — are still rising, says atmospheric chemist Dale Hurst of the National Oceanic and Atmospheric Administration in Boulder, Colorado.
Volcanic lightning may supplant those as the main early source of fixed nitrogen, says atmospheric chemist Rafael Navarro - Gonzalez of the National University of Mexico in Mexico City.
«Results like this are tantalizing,» says atmospheric chemist Daniel Jacob of Harvard University.
However, atmospheric chemist James Kasting of Pennsylvania State University in University Park says most models still point to a toasty primitive Earth engulfed by thick greenhouse gases.
A new study aims to debunk that idea by surveying atmospheric chemists who specialize in condensation trails and geochemists working on atmospheric deposition of dust and pollution.
The inset map is a computer model of Asian mercury emissions across the Pacific Ocean at an altitude of 20,000 feet in April 2004, while atmospheric chemist Dan Jaffe was picking up significant mercury readings on Mount Bachelor (the highest concentrations are in red).
These oVOCs have been «poorly represented or partly even neglected in [climate] models,» says atmospheric chemist Jos Lelieveld of the Max Planck Institute for Chemistry in Mainz, Germany, who was not involved in the study.
Those data, along with the new work, will help scientists devise more accurate climate models, says atmospheric chemist Mattias Hallquist of the University of Gothenburg in Sweden.
At a symposium in Germany last week, atmospheric chemists debated for the first time whether aircraft should be banned from the stratosphere in order to protect the ozone layer.
An international team led by atmospheric chemist Qiang Zhang of Tsinghua University in Beijing looked at emissions data across 13 global regions for 2007, the last year comprehensive information was available.
Crill, and Stockholm University colleague, atmospheric chemist Brett Thornton, ventured to the East Siberian Arctic shelf to observe the area's infamous venting.
«This is the only long - term data set with regular measurements of ozone - destroying compounds in the stratosphere,» says atmospheric chemist Darin Toohey of the University of California, Irvine.
«In total, 62 molecular, evolutionary, marine and fishery biologists, physiologists, ecologist, biogeochemists, marine and atmospheric chemists join this year's KOSMOS experiment.
This comes from a large group of the world's top atmospheric chemists.
Douglas D. Davis passed away unexpectedly on 26 December 2016, taking from us an invaluable atmospheric chemist.
«We definitely don't think that we're ready to say this is something worth doing,» said atmospheric chemist Lynn Russell of the University of California, San Diego, a lead author on one of the report's volumes.
It should, atmospheric chemists concluded, remain safely in the lower atmosphere.
Fourteen years ago, when a frustrated Paul Crutzen blurted out the word «Anthropocene» at a scientific meeting in Mexico, the famous atmospheric chemist was expressing his despair at the scale of human damage to the Earth.
In 2000 Paul Crutzen, an eminent atmospheric chemist, realised he no longer believed he was living in the Holocene.
«This is a meteorological effect, it has nothing to do with chemistry,» said study co-author Susan Strahan, a NASA Goddard atmospheric chemist.
Her mentor, atmospheric chemist Renyi Zhang, «foresaw this was going to be very interesting, that it would boom,» says Fan.
Paul Crutzen, the Dutch atmospheric chemist who won a Nobel for his work on ozone depletion, coined the term «Anthropocene» ten years ago.
«The methane releases were extraordinarily high, the highest we've seen,» says UCI atmospheric chemist Donald Blake, co-author of the study.
«This is a cutting - edge study in the field of cloud - aerosol - precipitation interactions that includes an interdisciplinary group of atmospheric chemists and meteorologists,» he said.
Precisely how Hansen's fake magic gas story evolved was / is known by me and every other old atmospheric radiation engineer and atmospheric chemist who cared to know.
The benefits of this action are now on the horizon, according to atmospheric chemist Paul Newman, who offered a brief glimpse at a world without this treaty here at the annual meeting of the American Geophysical Union (AGU).
A scientific journal, Climatic Change, published a series of papers on the subject in August, including one by Paul Crutzen, a Nobel - prize - winning atmospheric chemist.
Jim Kasting, an atmospheric chemist at The Pennsylvania State University unaffiliated with the study says its results are «on the right track,» even though «the idea that methane might be a biosignature in an anoxic atmosphere is not exactly new.»
Co-authored by David Catling, an atmospheric chemist at the University of Washington in Seattle, the study peers deep into our planet's history to devise a novel recipe for finding single - celled life on faraway worlds in the not - too - distant future.
«The evaluation process is quite tough,» says Frank Keppler, an atmospheric chemist who won a EURYI award this year.
Natural sources of this substance are small, says Ryan Hossaini, an atmospheric chemist at Lancaster University in the United Kingdom.
Part of the challenge with many these volatile - emitting products is that they're specifically designed to evaporate as part of their job, says study coauthor Jessica Gilman, an atmospheric chemist at the National Oceanic and Atmospheric Administration in Boulder.
«You might expect air quality would decline if ammonia emissions go up, but this shows it won't happen, provided the emissions from combustion go down,» said Fabien Paulot, an atmospheric chemist with Princeton University and the National Oceanic and Atmospheric Administration who was not involved in the study.
«Some of the volatile organic compounds have been linked to health effects if exposure is long - term,» said co-author Donald Blake, an atmospheric chemist at University of California, Irvine.
«It's a big surprise,» says Susan Solomon, an atmospheric chemist at the Massachusetts Institute of Technology in Cambridge.