Results 21 to 30 of about 911,075 (316)

Measurement report: Ammonia in Paris derived from ground-based open-path and satellite observations [PDF]

open access: yesAtmospheric Chemistry and Physics, 2023
Ammonia (NH3) is an important air pollutant which, as a precursor of fine particulate matter, raises public health concerns. This study analyzes 2.5 years of NH3 observations derived from ground-based (miniDOAS; differential optical absorption ...
C. Viatte   +10 more
doaj   +1 more source

Dispersion Characteristics and Applications of Higher Order Isosceles Triangular Meshes in the Finite Element Method

open access: yesIEEE Open Journal of Antennas and Propagation, 2023
Mesh division plays an important role in applications of the finite element method (FEM). The proposed research shows that under the same order, the equilateral triangular meshes have the most uniform dispersion distribution. The isosceles triangles with
Yuhua Niu   +4 more
doaj   +1 more source

Near-real-time detection of unexpected atmospheric events using principal component analysis on the Infrared Atmospheric Sounding Interferometer (IASI) radiances [PDF]

open access: yesAtmospheric Measurement Techniques, 2023
The three Infrared Atmospheric Sounding Interferometer (IASI) instruments on board the Metop family of satellites have been sounding the atmospheric composition since 2006.
A. Vu Van   +13 more
doaj   +1 more source

The impact of organic pollutants from Indonesian peatland fires on the tropospheric and lower stratospheric composition [PDF]

open access: yesAtmospheric Chemistry and Physics, 2021
The particularly strong dry season in Indonesia in 2015, caused by an exceptionally strong El Niño, led to severe peatland fires resulting in high volatile organic compound (VOC) biomass burning emissions.
S. Rosanka   +6 more
doaj   +1 more source

An integrated approach to assessing the ecological state of urban park soils, Kirov, Russia

open access: yesЮг России: экология, развитие, 2023
Aim. Assess the ecological state of soils in park areas and public gardens in the city of Kirov, Kirov region, Russia, which are located near areas of heavy traffic, using an integrated approach based on data from physicochemical, microbiological ...
S. G. Skugoreva   +6 more
doaj   +1 more source

Multiscale observations of NH3 around Toronto, Canada [PDF]

open access: yesAtmospheric Measurement Techniques, 2021
Ammonia (NH3) is a major source of nitrates in the atmosphere and a major source of fine particulate matter. As such, there have been increasing efforts to measure the atmospheric abundance of NH3 and its spatial and temporal variability.
S. Yamanouchi   +8 more
doaj   +1 more source

A roadmap to estimating agricultural ammonia volatilization over Europe using satellite observations and simulation data [PDF]

open access: yesAtmospheric Chemistry and Physics, 2023
Ammonia (NH3) is one of the most important gases emitted from agricultural practices. It affects air quality and the overall climate and is in turn influenced by long-term climate trends as well as by short-term fluctuations in local and regional ...
R. Abeed   +10 more
doaj   +1 more source

Atmospheric ammonia variability and link with particulate matter formation: a case study over the Paris area [PDF]

open access: yesAtmospheric Chemistry and Physics, 2020
The Paris megacity experiences frequent particulate matter (i.e.PM2.5, particulate matter with a diameter less than 2.5 µm) pollution episodes in spring (March–April).
C. Viatte   +11 more
doaj   +1 more source

Time evolution of temperature profiles retrieved from 13 years of infrared atmospheric sounding interferometer (IASI) data using an artificial neural network [PDF]

open access: yesAtmospheric Measurement Techniques, 2022
The three infrared atmospheric sounding interferometers (IASIs), launched in 2006, 2012, and 2018, are key instruments to weather forecasting, and most meteorological centres assimilate IASI nadir radiance data into atmospheric models to feed their ...
M. Bouillon   +10 more
doaj   +1 more source

Smarandache mukti-squares [PDF]

open access: yes, 2007
We have introduced Smarandache quasigroups which are Smarandache non-associative structures. A quasigroup is a groupoid whose composition table is a Latin square.
Muktibodh, Arun S.
core   +1 more source

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