Results 61 to 70 of about 3,768,335 (339)

Chemical Composition of the Atmosphere

, 2012
Atmospheric trace gases have an important impact on Earth’s radiative budget, the oxidative or cleansing ability of the atmosphere, the formation, growth and properties of aerosols, air quality, and human health. During recent years, the coupling between atmospheric chemistry and climate has received particular attention.
Schlager, Hans, Grewe, Volker, Roiger, Anke   +2 more
openaire   +3 more sources

The Network for the Detection of Atmospheric Composition Change (NDACC): history, status and perspectives

, 2017
. The Network for the Detection of Atmospheric Composition Change (NDACC) is an international global network of more than 90 stations making high-quality measurements of atmospheric composition that began official operations in 1991 after 5 years of ...
M. Mazière, A. Thompson, M. Kurylo, J. Wild, G. Bernhard, T. Blumenstock, G. Braathen, J. Hannigan, J. Lambert, T. Leblanc, T. Mcgee, G. Nedoluha, I. Petropavlovskikh, G. Seckmeyer, P. Simon, W. Steinbrecht, S. Strahan   +16 more
semanticscholar   +1 more source

DECIPHERING THE ATMOSPHERIC COMPOSITION OF WASP-12b: A COMPREHENSIVE ANALYSIS OF ITS DAYSIDE EMISSION [PDF]

, 2014
WASP-12b was the first planet reported to have a carbon-to-oxygen ratio (C/O) greater than one in its dayside atmosphere. However, recent work to further characterize its atmosphere and confirm its composition has led to incompatible measurements and ...
K. Stevenson, J. Bean, N. Madhusudhan, J. Harrington   +3 more
semanticscholar   +1 more source

The Chemical Composition of the Atmosphere of Venus [PDF]

Symposium - International Astronomical Union, 1971
The chemical composition sensors on the Venera-4, -5, and -6 spacecraft are described. The mixing ratio by volume of carbon dioxide is determined to be 97 (+3, −4)%; nitrogen, less than 2%, oxygen, less than about 0.1%; and water vapor at the 25 °C temperature level, on the order of 10 mg/l, an amount large enough to imply that the clouds of Venus are ...
O. M. Kalinkina, Yu. A. Surkov, A. P. Vinogradov, B. M. Andreichikov, I. M. Grechischeva   +4 more
openaire   +2 more sources

Measurement report: The effects of SECA regulations on the atmospheric SO₂ concentrations in the Baltic Sea, based on long-term observations on the Finnish island, Utö [PDF]

Atmospheric Chemistry and Physics
The designation of the Baltic Sea as a sulfur emission control area (SECA) in May 2006, with subsequent tightening of regulations in 2010 and 2015, has reduced the sulfuric emission from shipping traffic.
A. Maragkidou, T. Grönholm, L. Rautiainen, J. Nikmo, J.-P. Jalkanen, T. Mäkelä, T. Anttila, L. Laakso, L. Laakso, J. Kukkonen, J. Kukkonen   +10 more
doaj   +1 more source

Characterization of trace metals on soot aerosol particles with the SP-AMS: detection and quantification [PDF]

Atmospheric Measurement Techniques, 2015
A method to detect and quantify mass concentrations of trace metals on soot particles by the Aerodyne soot-particle aerosol mass spectrometer (SP-AMS) was developed and evaluated in this study.
S. Carbone, T. Onasch, S. Saarikoski, H. Timonen, K. Saarnio, D. Sueper, T. Rönkkö, L. Pirjola, A. Häyrinen, D. Worsnop, R. Hillamo   +10 more
doaj   +1 more source

Microbial exopolysaccharide production by polyextremophiles in the adaptation to multiple extremes

FEBS Letters, EarlyView.
Polyextremophiles are microorganisms that endure multiple extreme conditions by various adaptation strategies that also include the production of exopolysaccharides (EPSs). This review provides an integrated perspective on EPS biosynthesis, function, and regulation in these organisms, emphasizing their critical role in survival and highlighting their ...
Tracey M Gloster, Ebru Toksoy Öner
wiley   +1 more source

The applicability and challenges of black carbon sensors in monitoring networks [PDF]

Aerosol Research
Black carbon (BC) is a particulate pollutant emitted as a by-product of combustion. BC has an emerging role in air quality monitoring with the current recommendations by the World Health Organization to monitor BC to capture its temporal and spatial ...
J. T. Elomaa, K. Luoma, K. Luoma, S. D. Harni, A. Virkkula, H. Timonen, T. Petäjä   +6 more
doaj   +1 more source

Snow Samples Combined With Long-Range Transport Modeling to Reveal the Origin and Temporal Variability of Black Carbon in Seasonal Snow in Sodankylä (67°N)

Frontiers in Earth Science, 2020
In the Arctic areas, the influence of global climate change is enhanced. Enabling a better understanding of the changes in the Arctic environment is of the utmost importance.
Outi Meinander, Anna Kontu, Rostislav Kouznetsov, Rostislav Kouznetsov, Mikhail Sofiev   +4 more
doaj   +1 more source

Imeglimin attenuates liver fibrosis by inhibiting vesicular ATP release from hepatic stellate cells

FEBS Letters, EarlyView.
Imeglimin, at clinically relevant concentrations, inhibits vesicular ATP accumulation and release from hepatic stellate cells, thereby attenuating purinergic signaling and reducing fibrogenic activation. This mechanism reveals a newly identified antifibrotic action of imeglimin beyond glycemic control.
Seiji Nomura, Lixiang Wang, Nao Hasuzawa, Ayako Nagayama, Sawako Moriyama, Kenji Ashida, Yoshinori Moriyama, Masatoshi Nomura, Ken Yamamoto   +8 more
wiley   +1 more source