Space options for tropical cyclone hazard mitigation

Dicaire, Isabelle; Nakamura, Ryosuke; Arikawa, Yasuyoshi; Okada, Kazuyuki; Itahashi, Takamasa; Summerer, Leopold

doi:10.1016/j.actaastro.2014.11.022

Cited by 3 publications

(2 citation statements)

References 48 publications

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“…The key question which obviously arises then is the feasibility of such large scale operation. Although highly speculative, this approach should, however, be brought in perspective to some parallel projects also aiming at bringing high intensity lasers on satellite platforms (Dicaire et al 2015, Mourou 2015, Quinn et al 2015, Dicaire et al, 2016. We will present some developments to this end in section 4.2 on the specific case of cirrus clouds.…”

Section: Potential Applications: Precipitation Modulation and Albedo ...mentioning

confidence: 99%

Short-pulse lasers for weather control

Wolf

2017

Rep. Prog. Phys.

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Filamentation of ultra-short TW-class lasers recently opened new perspectives in atmospheric research. Laser filaments are self-sustained light structures of 0.1-1 mm in diameter, spanning over hundreds of meters in length, and producing a low density plasma (10-10 cm) along their path. They stem from the dynamic balance between Kerr self-focusing and defocusing by the self-generated plasma and/or non-linear polarization saturation. While non-linearly propagating in air, these filamentary structures produce a coherent supercontinuum (from 230 nm to 4 µm, for a 800 nm laser wavelength) by self-phase modulation (SPM), which can be used for remote 3D-monitoring of atmospheric components by Lidar (Light Detection and Ranging). However, due to their high intensity (10-10 W cm), they also modify the chemical composition of the air via photo-ionization and photo-dissociation of the molecules and aerosols present in the laser path. These unique properties were recently exploited for investigating the capability of modulating some key atmospheric processes, like lightning from thunderclouds, water vapor condensation, fog formation and dissipation, and light scattering (albedo) from high altitude clouds for radiative forcing management. Here we review recent spectacular advances in this context, achieved both in the laboratory and in the field, reveal their underlying mechanisms, and discuss the applicability of using these new non-linear photonic catalysts for real scale weather control.

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Section: Potential Applications: Precipitation Modulation and Albedo ...mentioning

confidence: 99%

Short-pulse lasers for weather control

Wolf

2017

Rep. Prog. Phys.

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“…Simulation results from Hoffman indicate that a temperature increase of nearly 2°C causes the route modification or the reduction of the tropical cyclone. Isabelle Dicaire et al [14] compute that under the following assumptions: (i) a transmission power is 1.5 GW with one space platform, (ii) the target is only water vapor, and the absorption rate of the power is 100%, (iii) the density of the water vapor is 5g/m 3 , and (iv) the irradiation area has a circular, cylindrical shape with a 100-km diameter and 10-km height, heating a tropical cyclone by 2°C with an irradiation duration of 5 d by five SPSs. It is too long for 5 days but if only the irradiation power enhance the required radiation period would shorten.…”

Section: Discussionmentioning

confidence: 99%

A Methodology for Applying Conditional Nonlinear Optimal Perturbation and Natural Cybernetics to Tropical Cyclone Mitigation

Peng¹,

Shi²,

Chen³

et al. 2019

WROS

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Investigations into tropical cyclone mitigation, especially those made by Ross Hoffman, are introduced in the beginning to elicit the weather control version of 4-Dimensional Variation (4D-Var) as a nonlinear optimal control technique and the theory of natural cybernetics. Subsequently, the concept of Conditional Nonlinear Optimal Perturbations (CNOP) and the existing connotation of natural cybernetics related to weather modification are briefly presented. After that, the primary application of CNOP, improved by comparison with 4D-Var, are stressed upon, which can make use of the observational data during the controlling process, thereby having some advantages over 4D-Var in weather control. The technique may be called 'nonlinear optimal forcing variation calculus (NOFV)' or 'nonlinear optimal forcing perturbation (NOFP)' approach, which could make controlling as close to the observation as possible. Moreover, two other applications of CNOP, i.e. inversion of the initial perturbation evolving into a tropical cyclone and the solution of perturbation yielding maximum vertical wind shear with CNOP, are further investigated. Subsequently, the application of natural cybernetics to tropical cyclone mitigation and control, is analyzed in comparison with precipitation enhancement. Meanwhile, the means to realize tropical cyclone control and mitigation are synoptically reviewed. The investigation and analysis show that CNOP approach and natural cybernetics are useful in tropical cyclone mitigation and control.

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