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再投射至天空

  • (责任编(bian)辑:王姣雁)

    当日(ri)傍晚(wan),高温天(tian)气让深圳(zhen)上空时隔(ge)几天(tian)后再(zai)次出(chu)现(xian)(xian)绚丽(li)晚(wan)霞(xia),红霞(xia)布满了(le)大半(ban)个(ge)天(tian)空,甚为壮观。更稀奇的(de)是,在(zai)晚(wan)霞(xia)中出(chu)现(xian)(xian)了(le)一道像(xiang)彩(cai)虹(hong)一样的(de)蓝色神秘(mi)光(guang)弧(hu),时间持续了(le)大约15分钟。有(you)人说(shuo)是龙卷风,有(you)人说(shuo)是飞(fei)机飞(fei)过云(yun)层(ceng)的(de)痕迹,众说(shuo)纷纭,莫衷一是。后经(jing)香港气象(xiang)专(zhuan)家解(jie)释,这(zhei)是罕见的(de)“反曙暮辉”现(xian)(xian)象(xiang),通(tong)常在(zai)黎明前或黄昏后出(chu)现(xian)(xian),当太阳(yang)(yang)低(di)于地平线,阳(yang)(yang)光(guang)被云(yun)层(ceng)或者山(shan)峰遮挡,部分穿透的(de)光(guang)束从缝隙中透出(chu),再(zai)投射(she)至天(tian)空,就形成了(le)圆弧(hu)形光(guang)柱。“反曙暮辉”现(xian)(xian)象(xiang)要多(duo)个(ge)条件(jian)配合才能出(chu)现(xian)(xian),一般由多(duo)条放射(she)状(zhuang)光(guang)束组成,而类(lei)似于今天(tian)出(chu)现(xian)(xian)的(de)像(xiang)彩(cai)虹(hong)一样的(de)单(dan)条弧(hu)形光(guang)弧(hu),则极(ji)为罕见。(邓飞(fei)摄/光(guang)明图片)


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