Results 21 to 30 of about 137,144 (305)

Importance of lower atmospheric forcing and magnetosphere-ionosphere coupling in simulating neutral density during the February 2016 geomagnetic storm

open access: yesFrontiers in Astronomy and Space Sciences, 2022
During geomagnetic storms a large amount of energy is transferred into the ionosphere-thermosphere (IT) system, leading to local and global changes in e.g., the dynamics, composition, and neutral density.
Astrid Maute   +5 more
doaj   +1 more source

Preliminary Corrosion Behavior of AE44/MS Bolt Structure in Marine Atmosphere with Different Humidity [PDF]

open access: yesCailiao Baohu, 2023
The mixed use of different materials in marine climate environment will form galvanic pair to accelerate structural corrosion.Numerical simulation was conducted on the corrosion characteristics of AE44/MS magnesium alloy plate steel bolted connection ...
LIN Qidie
doaj   +1 more source

METRIC: A Dedicated Earth-Orbiting Spacecraft for Investigating Gravitational Physics and the Space Environment

open access: yesAerospace, 2017
A dedicated mission in low Earth orbit is proposed to test predictions of gravitational interaction theories and to directly measure the atmospheric density in a relevant altitude range, as well as to provide a metrological platform able to tie different
Roberto Peron, Enrico C. Lorenzini
doaj   +1 more source

Neutral Atmospheric Density Measurement Using Insight-HXMT Data by the Earth Occultation Technique

open access: yesThe Astrophysical Journal Supplement Series, 2022
The Earth occultation technique has broad applications in both astronomy and atmospheric density measurements. We construct the background model during the occultation of the Crab Nebula observed by the Insight-Hard X-ray Modulation Telescope (Insight ...
Wang-Chen Xue   +14 more
doaj   +1 more source

Intraspecific differences in plant functional traits are related to urban atmospheric particulate matter

open access: yesBMC Plant Biology, 2021
Background Functional trait-based ecological research has been instrumental in advancing our understanding of environmental changes. It is still, however, unclear how the functional traits of urban plants respond to atmospheric particulate matter, and ...
Jiyou Zhu, Chengyang Xu
doaj   +1 more source

An overview of atmospheric deposition chemistry over the Alps: present status and long-term trends [PDF]

open access: yes, 2006
Several research programs monitoring atmospheric deposition have been launched in the Alpine countries in the last few decades. This paper uses data from previous and ongoing projects to: (i) investigate geographical variability in wet deposition ...
Thimonier, Anne   +14 more
core   +1 more source

ELECTRON DENSITIES AND ALKALI ATOMS IN EXOPLANET ATMOSPHERES [PDF]

open access: yesThe Astrophysical Journal, 2014
We describe a detailed study on the properties of alkali atoms in extrasolar giant planets, and specifically focus on their role in generating the atmospheric free electron densities, as well as their impact on the transit depth observations. We focus our study on the case of HD 209458 b, and we show that photoionization produces a large electron ...
Lavvas, Panayotis   +2 more
openaire   +2 more sources

Exploring atmospheric exchange with natural tracers [PDF]

open access: yes, 2011
This study is focused on the application of radon (222Rn; half life time of 3.82 days) as an atmospheric tracer for evaluating the exchange of trace compounds between the land surface and the atmosphere and for understanding atmospheric mixing processes.
Xia, Yu
core   +1 more source

Impact of Atmospheric Correction on Classification and Quantification of Seagrass Density from WorldView-2 Imagery

open access: yesRemote Sensing, 2023
Mapping the seagrass distribution and density in the underwater landscape can improve global Blue Carbon estimates. However, atmospheric absorption and scattering introduce errors in space-based sensors’ retrieval of sea surface reflectance, affecting ...
Victoria J. Hill   +7 more
doaj   +1 more source

Possibilities of Improving the TD88 Atmospheric Total Density Model [PDF]

open access: yesSerbian Astronomical Journal, 2010
In this paper we have examined possibilities for preserving and improving the total density model of the Earth's neutral thermosphere TD88 (Sehnal and Pospisilova 1988) via modelling differences between TD88 and NRLMSISE-00 (Picone et al. 2002), which is
Segan, S., Marceta, D.
doaj   +3 more sources

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