The mechanism of lightning that ignites a forest fire and the lightning that occurs above a forest fire are explained at the molecular level. It is based on two phenomena, namely, internal charge separation inside the...The mechanism of lightning that ignites a forest fire and the lightning that occurs above a forest fire are explained at the molecular level. It is based on two phenomena, namely, internal charge separation inside the atmospheric cloud particles and the existence of a layer of positively charged hydrogen atoms sticking out of the surface of the liquid layer of water on the surface of rimers. Strong turbulence-driven collisions of the ice particles and water droplets with the rimers give rise to breakups of the ice particles and water droplets into positively and negatively charged fragments leading to charge separation. Hot weather in a forest contributes to the updraft of hot and humid air, which follows the same physical/chemical processes of normal lightning proposed and explained recently[1]. Lightning would have a high probability of lighting up and burning the dry biological materials in the ground of the forest, leading to a forest (wild) fire. The burning of trees and other plants would release a lot of heat and moisture together with a lot of smoke particles (aerosols) becoming a strong updraft. The condition for creating lightning is again satisfied which would result in further lightning high above the forest wild fire.展开更多
This paper discusses participatory processes in wildland fire management （WFM）. Participation is an essential element of both the European Sustainable Development （SD） Strategy and the White Paper on Governance. G...This paper discusses participatory processes in wildland fire management （WFM）. Participation is an essential element of both the European Sustainable Development （SD） Strategy and the White Paper on Governance. Governance end SD have thus become an interconnected challenge to be applied to WFM （as a sub-area in forest policy）, amongst other policies. An overspread weakness in WFM is lack of real participation of stakeholders. Absence of （or deficient） participation can seriously impair contribution of this group to WFM in high-risk areas and runs counter governance and the SDS. Further, this weakness might prevent an efficient use of fire as a land management tool （prescribed burning, PB） and as a technique for fighting wildfire （suppression fire, SF）. Even though these fire practices have been well known in many different places, they have been increasingly neglected or Prohibited over time in Southern Europe. At present, forest and fire fighting administrations are turning their eyes back on them and analyzing the benefits of using fire in relation to preventive and suppressive actions. Therefore, participatory and diffusion mechanisms （the latter adopting the shape of national and international experts＇ networks） are required in order to solve the so- called fire paradox： that is, the need to move from a one-dimensinnal perception of the negative impacts of fire to a more sophisticated one that also stresses its positive effects. Governance, based on broad social participation, and diffusion, through fire networks, are of utmost importance in order, first, to diminish long-standing suspicion amongst different interests as to the use of fire and, secondly, to diffuse best practices associated with PB and SF. Most importantly, the ELI should exercise its environmental leadership so that these new fire practices and sustainable WFM are diffused across the international arena.展开更多
文摘The mechanism of lightning that ignites a forest fire and the lightning that occurs above a forest fire are explained at the molecular level. It is based on two phenomena, namely, internal charge separation inside the atmospheric cloud particles and the existence of a layer of positively charged hydrogen atoms sticking out of the surface of the liquid layer of water on the surface of rimers. Strong turbulence-driven collisions of the ice particles and water droplets with the rimers give rise to breakups of the ice particles and water droplets into positively and negatively charged fragments leading to charge separation. Hot weather in a forest contributes to the updraft of hot and humid air, which follows the same physical/chemical processes of normal lightning proposed and explained recently[1]. Lightning would have a high probability of lighting up and burning the dry biological materials in the ground of the forest, leading to a forest (wild) fire. The burning of trees and other plants would release a lot of heat and moisture together with a lot of smoke particles (aerosols) becoming a strong updraft. The condition for creating lightning is again satisfied which would result in further lightning high above the forest wild fire.
基金the FIRE PARADOX Integrated Project, "An innovative approach of Integrate Wildland Fire Management Regulating the Wildfire Problem by the Wisuse of Fire: solving the Fire Paradox", financed by the VI Framewor Programme, Sub-priority 6.3 Global Change and Ecosystem
文摘This paper discusses participatory processes in wildland fire management （WFM）. Participation is an essential element of both the European Sustainable Development （SD） Strategy and the White Paper on Governance. Governance end SD have thus become an interconnected challenge to be applied to WFM （as a sub-area in forest policy）, amongst other policies. An overspread weakness in WFM is lack of real participation of stakeholders. Absence of （or deficient） participation can seriously impair contribution of this group to WFM in high-risk areas and runs counter governance and the SDS. Further, this weakness might prevent an efficient use of fire as a land management tool （prescribed burning, PB） and as a technique for fighting wildfire （suppression fire, SF）. Even though these fire practices have been well known in many different places, they have been increasingly neglected or Prohibited over time in Southern Europe. At present, forest and fire fighting administrations are turning their eyes back on them and analyzing the benefits of using fire in relation to preventive and suppressive actions. Therefore, participatory and diffusion mechanisms （the latter adopting the shape of national and international experts＇ networks） are required in order to solve the so- called fire paradox： that is, the need to move from a one-dimensinnal perception of the negative impacts of fire to a more sophisticated one that also stresses its positive effects. Governance, based on broad social participation, and diffusion, through fire networks, are of utmost importance in order, first, to diminish long-standing suspicion amongst different interests as to the use of fire and, secondly, to diffuse best practices associated with PB and SF. Most importantly, the ELI should exercise its environmental leadership so that these new fire practices and sustainable WFM are diffused across the international arena.
