Dissociative chemisorption dynamics of H2 on Ni and Cu surfaces: Morphology and surface temperature effects

1986 ◽  
Vol 85 (7) ◽  
pp. 4161-4171 ◽  
Author(s):  
Chyuan‐Yih Lee ◽  
Andrew E. DePristo
Keyword(s):  
Surface Temperature ◽  
Temperature Effects ◽  
Dissociative Chemisorption

Surface Temperature Effects on Dissociative Chemisorption of H2 on Cu(100)

2013 ◽  
Vol 117 (17) ◽  
pp. 8851-8863 ◽  
Author(s):  
Ali Marashdeh ◽  
Simone Casolo ◽  
Luca Sementa ◽  
Helmut Zacharias ◽  
Geert-Jan Kroes
Keyword(s):  
Surface Temperature ◽  
Temperature Effects ◽  
Dissociative Chemisorption

scholarly journals How Asian aerosols impact regional surface temperatures across the globe

2020 ◽  
Author(s):  
Joonas Merikanto ◽  
Kalle Nordling ◽  
Petri Räisänen ◽  
Jouni Räisänen ◽  
Declan O'Donnell ◽  
...  
Keyword(s):  
Surface Temperature ◽  
Temperature Effects ◽  
Energy Transport ◽  
Temperature Response ◽  
The Arctic ◽  
Anthropogenic Aerosols ◽  
Atmospheric Energy ◽  
Atmospheric Energy Transport ◽  
Temperature Responses ◽  
Global Surface

Abstract. South and East Asian anthropogenic aerosols mostly reside in an air mass extending from the Indian Ocean to the North Pacific. Yet the surface temperature effects of Asian aerosols spread across the whole globe. Here, we remove Asian anthropogenic aerosols from two independent climate models (ECHAM6.1 and NorESM1) using the same representation of aerosols via MACv2-SP (a simple plume implementation of the 2nd version of the Max Planck Institute Aerosol Climatology). We then robustly decompose the global distribution of surface temperature responses into contributions from atmospheric energy flux changes. We find that the horizontal atmospheric energy transport strongly moderates the surface temperature response over the regions where Asian aerosols reside. Atmospheric energy transport and changes in clear-sky longwave radiation redistribute the temperature effects efficiently across the Northern hemisphere, and to a lesser extent also over the Southern hemisphere. The model-mean global surface temperature response to Asian anthropogenic aerosol removal is 0.26 ± 0.04 °C (0.22 ± 0.03 for ECHAM6.1 and 0.30 ± 0.03 °C for NorESM1) of warming. Model-to-model differences in global surface temperature response mainly arise from differences in longwave cloud (0.01 ± 0.01 for ECHAM6.1 and 0.05 ± 0.01 °C for NorESM1) and shortwave cloud (0.03 ± 0.03 for ECHAM6.1 and 0.07 ± 0.02 °C for NorESM1) responses. The differences in cloud responses between the models also dominate the differences in regional temperature responses. In both models, the Northern hemispheric surface warming amplifies towards the Arctic, where the total temperature response is highly seasonal and weakest during the Arctic summer. We estimate that under a strong Asian aerosol mitigation policy tied with strong climate mitigation (Shared Socioeconomic Pathway 1-1.9) the Asian aerosol reductions can add around 8 years' worth of current day global warming during the next few decades.

DISSOCIATIVE CHEMISORPTION OF H2(D2) AT Fe(110)

1994 ◽  
Vol 01 (04) ◽  
pp. 693-696 ◽  
Author(s):  
A. WIGHT ◽  
A. HODGSON ◽  
G. WORTHY ◽  
D. BUTLER ◽  
B.E. HAYDEN
Keyword(s):  
Surface Temperature ◽  
Experimental Error ◽  
Internal State ◽  
Incident Angle ◽  
Translational Energy ◽  
Surface Site ◽  
Dissociative Chemisorption ◽  
State Distribution ◽  
Energy Scaling ◽  
Low Energies

The dissociative chemisorption of H2(D2) at a Fe(110) surface has been studied as a function of translational energy ET, internal energy Ei, incident angle θi, and surface temperature Ts. Adsorption is activated, the sticking probability increasing steadily with translational energy with no evidence of a threshold for dissociation. Within experimental error there is no isotope effect or surface temperature dependence (180 K<Ts<400 K). Using seeded beams at constant translational energy, sticking on a clean surface is insensitive to the internal state distribution of the incident molecules, consistent with a barrier to dissociative chemisorption in the entrance channel. For translational energies below 0.2 eV sticking deviates from normal energy scaling, momentum parallel to the surface strongly inhibiting dissociative chemisorption. Dissociaton is interpreted in terms of a localised surface site for dissociative chemisorption at low energies.

Surface temperature effects on the retention and pressure variation in continuous and cyclic plasma exposures on the tungsten

2009 ◽  
Vol 390-391 ◽  
pp. 671-676
Author(s):  
K. Okamoto ◽  
H. Zushi ◽  
Y. Hirooka ◽  
R. Bhattacharyay ◽  
M. Sakamoto ◽  
...  
Keyword(s):  
Surface Temperature ◽  
Temperature Effects ◽  
Pressure Variation

scholarly journals Deforestation Effects as Different as Night and Day

Eos ◽  
2017 ◽  
Author(s):  
Sarah Witman
Keyword(s):  
Surface Temperature ◽  
Land Surface Temperature ◽  
Land Surface ◽  
Temperature Effects ◽  
Time Of Day ◽  
Night And Day

Study investigates how deforestation can cause different land surface temperature effects depending on the time of day.

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