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A long-feared scenario in which global warming causes Arctic permafrost to melt and release enough methane—a potent greenhouse gas--to accelerate warming and cause catastrophe probably won't happen.
Human-driven carbon release rate unprecedented in past 66 million years
Human-driven carbon release rate past 66 million years
2016/3/28
The earliest measurements of Earth's climate using thermometers and other tools start in the 1850s.To look further back in time, scientists investigate air bubbles trapped in ice cores, expanding the ...
Release of mercury halides from KCl denuders in the presence of ozone
mercury halides KCl denuders the presence of ozone
2010/9/14
KCl-coated denuders have become a standard method for measurement of gaseous oxidized mercury, but their performance has not been exhaustively evaluated, especially in field conditions. In this study,...
Fractional release factors of long-lived halogenated organic compounds in the tropical stratosphere
Fractional release factors halogenated organic compounds tropical stratosphere
2010/2/21
Fractional release factors (FRFs) of organic trace gases are time-independent quantities that influence the calculation of Global Warming Potentials and Ozone Depletion Potentials. We present the firs...
Process-based modelling of biogenic monoterpene emissions combining production and release from storage
Process-based modelling biogenic monoterpene emissions storage
2009/6/2
Monoterpenes, primarily emitted by terrestrial vegetation, can influence atmospheric ozone chemistry, and can form precursors for secondary organic aerosol. The short-term emissions of monoterpenes h...
Release and dispersion of vegetation and peat fire emissions in the atmosphere over Indonesia 1997/1998
vegetation peat fire emissions atmosphere Indonesia
2009/3/9
Smoke-haze episodes caused by vegetation and peat fires affect parts of Indonesia every year with significant impacts on human health and climate. Particularly fires in degenerated peat areas release ...
New insights in the global cycle of acetonitrile: release from theocean and dry deposition in the tropical savanna of Venezuela
global cycle of acetonitrile dry deposition tropical savanna of Venezuela
2009/2/20
Using the proton transfer reaction mass spectrometry (PTR-MS) technique, acetonitrile was measured during the wet season in a Venezuelan woodland savanna. The site was located downwind of the Caribbea...
We report on the emission of water vapor from biomass combustion. Concurrent measurements of carbon monoxide and carbon dioxide are used to scale the concentrations of water vapor found, and are refer...
Multiphase modeling of nitrate photochemistry in the quasi-liquid layer (QLL): implications for NOx release from the Arctic and coastal Antarctic snowpack
Multiphase modeling nitrate photochemistry quasi-liquid layer NOx release Arctic
2008/11/17
We utilize a multiphase model, CON-AIR (Condensed Phase to Air Transfer Model), to show that the photochemistry of nitrate (NO3−) in and on ice and snow surfaces, specifically the quasi-liquid l...
Quasi-100 ky glacial-interglacial cycles triggered by subglacial burial carbon release
glacial-interglacial cycles subglacial carbon
2008/11/4
A mechanism is proposed in which climate, carbon cycle and icesheets interact with each other to produce a feedback that can lead to quasi-100 ky glacial-interglacial cycles. A central process is the ...