Results 1 to 10 of about 35,565 (75)

Stochastic Paleoclimatology: Modeling the EPICA Ice Core Climate Records [PDF]

Chaos vol 33, 093132 (2023), 2022
We analyze and model the stochastic behavior of paleoclimate time series and assess the implications for the coupling of climate variables during the Pleistocene glacial cycles. We examine 800 kyr of carbon dioxide, methane, nitrous oxide, and temperature proxy data from the EPICA Dome-C ice core, which are characterized by 100~kyr glacial cycles ...
arxiv   +1 more source

Precision Spectroscopy of Nitrous Oxide Isotopocules with a Cross-Dispersed Spectrometer and Mid-Infrared Frequency Comb [PDF]

Analytical Chemistry 92, 13759-13766 (2020), 2020
As a potent greenhouse gas and ozone depleting agent, nitrous oxide (N$_2$O) plays a critical role in the global climate. Effective mitigation relies on understanding global sources and sinks which can be supported through isotopic analysis. We present a cross-dispersed spectrometer, coupled with a mid-infrared frequency comb, capable of simultaneously
arxiv   +1 more source

Reactivity of Ru oxides with air radiolysis products investigated by theoretical calculations [PDF]

Journal of Nuclear Materials, 558, 153395 (2021), 2021
Quantitative predictions of the release of volatile radiocontaminants of ruthenium (Ru) in the environment from either nuclear power plants (NPP) or fuel recycling accidents present significant uncertainties while estimated by severe accidents nuclear analysis codes.
arxiv   +1 more source

The effect of varying atmospheric pressure upon habitability and biosignatures of Earth-like planets [PDF]

Astrobiology, Volume 18, Issue 2, 2018, pp.116-132, 2020
Understanding the possible climatic conditions on rocky extrasolar planets, and thereby their potential habitability, is one of the major subjects of exoplanet research. Determining how the climate, as well as potential atmospheric biosignatures, change under different conditions is a key aspect when studying Earth-like exoplanets.
arxiv   +1 more source

N_2O weak lines observed between 3900 and 4050 cm^-1 from long path absorption spectra [PDF]

Journal of Molecular Spectroscopy 238 (2006) 256-259, 2006
Previously unobserved nitrous oxide transitions around 2.5 $\mu$m are measured by intracavity laser absorption spectroscopy (ICLAS) analyzed by time-resolved Fourier transform (TRFT) spectrometer. With an accuracy of the order of 10^-3 cm^-1, measured positions of 1637 assigned weak transitions are provided.
arxiv   +1 more source

Nitrous Oxide and Climate [PDF]

arXiv, 2022
Higher concentrations of atmospheric nitrous oxide (N2O) are expected to slightly warm Earth's surface because of increases in radiative forcing. Radiative forcing is the difference in the net upward thermal radiation flux from the Earth through a transparent atmosphere and radiation through an otherwise identical atmosphere with greenhouse gases ...
arxiv  

Reducing greenhouse gas emissions and grain arsenic and lead levels without compromising yield in organically produced rice [PDF]

Agriculture, Ecosystems & Environment, 2020: 295, 106922, 2020
Flooded rice production is crucial to global food security, but there are associated environmental concerns. In particular, it is a significant source of methane and nitrous oxide emissions and a large consumer of water resources, while arsenic, cadmium and lead levels in the grain are a serious health concern.
arxiv   +1 more source

A computational model for the design of a nitrous oxide--paraffin wax hybrid rocket engine [PDF]

arXiv, 2023
A computational model is developed to assist the design of the first hybrid rocket engine of the McGill Rocket Team, using liquid nitrous oxide as an oxidizer and solid paraffin wax as a fuel. The model is developed in three phases: In the first phase, a steady-state model which neglects transient performance decrease of the hybrid engine is considered.
arxiv  

Rayleigh-Brillouin light scattering spectroscopy of nitrous oxide (N$_2$O) [PDF]

Journal of Quantitative Spectroscopy and Radiative Transfer (2017), 2017
High signal-to-noise and high-resolution light scattering spectra are measured for nitrous oxide (N$_2$O) gas at an incident wavelength of 403.00 nm, at 90$^\circ$ scattering, at room temperature and at gas pressures in the range $0.5-4$ bar. The resulting Rayleigh-Brillouin light scattering spectra are compared to a number of models describing in an ...
arxiv   +1 more source

The effective mitigation of greenhouse gas emissions from rice paddies without compromising yield by early-season drainage [PDF]

Science of the Total Environment, 2018: 612, 1329-1339, 2020
Global rice production systems face two opposing challenges: the need to increase production to accommodate the world's growing population while simultaneously reducing greenhouse gas (GHG) emissions. Adaptations to drainage regimes are one of the most promising options for methane mitigation in rice production.
arxiv   +1 more source