搜索结果: 61-75 共查到“理学 atmosphere”相关记录284条 . 查询时间(0.078 秒)
Penn chemists observe key reaction for producing 'atmosphere's detergent'
atmosphere's detergen atmosphere
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2014/10/9
Earth’s atmosphere is a complicated dance of molecules. The chemical output of plants, animals and human industry rise into the air and pair off in sequences of chemical reactions. Such processes help...
Detection of water vapor in the atmosphere of a hot Jupiter（图）
a hot Jupiter water vapo
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2014/3/20
Although liquid water covers a majority of Earth's surface, scientists are still searching for planets outside our solar system that contain water. California Institute of Technology researchers have ...
Sensing the upper and lower levels of the atmosphere during the 2009 equinoxes using GPS measurements
GPS TEC PWV Equinoxes Conjugate points Associations
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2015/8/17
This short-term work characterized the upper and lower levels of the atmosphere through Global Positioning System (GPS) measurements. The observations were conducted during the 2009 equinoxes from two...
High levels of molecular chlorine found in arctic atmosphere（图）
Molecular chlorine Bromine chemistry
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2014/3/17
Scientists studying the atmosphere above Barrow, Alaska, have discovered unprecedented levels of molecular chlorine in the air, a new study reports.
Acoustic ray tracing in the atmosphere: with gravitational effect and attenuation considered
Acoustic ray tracing Dissipative dispersion relation Gravity effect Attenuation
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2015/8/18
An acoustic ray tracing model is developed to take into account the impacts of gravitational field and realistic atmospheric attenuation. Ray tracing equations are deduced from the real part of the di...
Determining precipitable water in the atmosphere of Iran based on GPS zenith tropospheric delays
Precipitable water Zenith wet delay Radiosonde profiles GPS Modeling
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2015/8/18
Precipitable water (PW) is considered as one of the most important weather parameters in meteorology. Moreover, moisture affects the propagation of the Global Positioning System’s (GPS) signals. Using...
Helium and Argon Isotopic Studies of Fossil Material and the Theoretical Evolution of He and Ar in Earth’s Atmosphere through Time
Fossils Argon Helium Isotopes Atmospheric Evolution
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2013/3/11
We analyzed the elemental concentrations and the isotopic compositions of helium and argon in Cambrian to Jurrassic aged Gastropod, Ammonite and Trilobite fossils in order to examine variation in thes...
Exploiting Potentials from Interdisciplinary Perspectives with Reference to Global Atmosphere and Biomass Burning Management
Ultrafine particles PNEF (Particle Number Emission Factor) Global estimate Biomass burning management Sustainability science
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2016/3/28
Biomass burning emitted aerosols are subject of concern in different disciplinary researches from different perspectives
(climate change science from shift of balance in radiative forcing having seve...
Propagation properties of stochastic electromagnetic double-vortex beams in turbulent atmosphere
double-vortex beams coherent polarization turbulent atmosphere
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2013/7/3
Based on the extended Huygens–Fresnel principle, we study the propagation properties of stochastic electro-magnetic double-vortex beams in turbulent atmosphere. The result shows that the spreading of ...
Investigation on the Behavior of Pesticides in Atmosphere
Pesticides XAD-2 adsorbent GC analysis Atmosphere Air quality
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2016/3/28
Although pesticides are widely used in agriculture, they and in particular the relative residues in foodstuffs, water and
atmosphere, may cause remarkable sanitary problems due to the harmful effects...
Propagation of partially coherent double-vortex beams in turbulent atmosphere
Partially coherent Double-vortex beams Turbulent atmosphere
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2013/7/3
Based on the extended Huygens–Fresnel principle, we study the propagation properties of partially coherent double-vortex beams in turbulent atmosphere. The intensity distribution of the beams on propa...
A sustained oscillation in a toy-model of the coupled atmosphere-ocean system
toy-model the coupled atmosphere-ocean system
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2011/8/31
Interaction between atmospheric mid-latitude flow and wind-driven ocean circulation is studied coupling two idealized low-order spectral models. The barotropic Charney-DeVore model with three componen...
Measurements of Gaseous NH3 and Particulate NH4 + in the Atmosphere by Fluorescent Detection after Continuous Air–water Droplet Sampling
Ammonia Gas-particle partitioning Microflow analysis Short-term variation
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2016/3/28
Phase partitioning of NHx (gaseous NH3 and particulate NH4
+) in the atmosphere is crucial for the lifetime of NHx
during atmospheric transport. Reliable data for gaseous NH3 and NH4
+ in aerosols ...
Characterizing the Gas-phase Organochlorine Pesticides in the Atmosphere over the Pearl River Delta Region
Organochlorine pesticides Gas phase Pearl River Delta Region
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2016/3/28
The organochlorine pesticides (OCPs) in the atmosphere were measured at four sampling sites located in Guangzhou
(GZ), Zhaoqing (ZQ) and Hong Kong (HK) over the Pearl River Delta Region (PRDR) in one...
On the Wind and Turbulence in the Lower Atmosphere above Complex Terrain
Numerical Modeling Complex Terrain Characteristics of Atmospheric Turbulence
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2013/3/6
Numerical modeling and studies of the wind fields at the junction of three continents: over the complex terrains of the South-east Europe, Asia Minor, Middle East, Caucasus and over the Black, Caspian...