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Some interesting electrical activity in the clouds of ash ___1___ around Europe as a result of that ___2___ volcano. Models predicted that electrical charge should be limited to the top and bottom of any ash plume, which is often the site of spectacular lightning.
___3___ And that such charge was being generated within the plume—it wasn’t a remnant of the energy of the volcanic eruption or a result of any local weather events. Interactions among ash particles seem to be constantly renewing the charge.
The finding appears in the journal Environmental Research Letters and is the first ___4___ research related to the April volcano eruption.
The study authors note that charging can change the way the particles ___5___ and how they interact with rain. The practical reason for understanding the electrical nature of ash plumes is that they can interfere with aircraft radio communication. And if any charged ash infiltrates a plane, it could be an electrostatic hazard, to the plane’s systems and to the plane’s passengers.
drifting Icelandic But info obtained by a weather balloon found significant electrical charge within the plume. peer-reviewed clump
近日，研究人員在籠罩歐洲全境的冰島火山灰云團(tuán)中發(fā)現(xiàn)了有趣的電現(xiàn)象。根據(jù)以前的模型，電荷僅存在于火山灰羽狀物的頂部和低端，那里時(shí)常發(fā)生華麗的閃電。 但氣象氣球搜集的數(shù)據(jù)顯示，火山灰羽狀物內(nèi)部也存在大量電荷，這些電荷并非火山爆發(fā)的剩余能量，也不是當(dāng)?shù)靥鞖庠斐傻慕Y(jié)果，而是火山灰羽狀物內(nèi)部的產(chǎn)物。其中粒子的碰撞不斷產(chǎn)生新的電荷。 該研究成果刊載于《環(huán)境研究快報(bào)》，是有關(guān)今年4月冰島火山噴發(fā)的第一篇經(jīng)過同行審查的研究文獻(xiàn)。（作者：R·G·哈里森等，HNic0） 研究人員發(fā)現(xiàn)，火山灰羽狀物內(nèi)部的電荷活動(dòng)能改變火山灰粒子集中的狀態(tài)，影響它們與降雨之間的相互作用。進(jìn)行此類研究的實(shí)際原因在于火山灰?guī)щ娦詫?duì)飛機(jī)無線電通訊造成干擾。同時(shí)，火山灰?guī)щ娏Ｗ舆M(jìn)入機(jī)身將對(duì)飛機(jī)及乘客造成靜電危害。