干旱气象
榦旱氣象
간한기상
GANSU METEOROLOGY
2014年
1期
10-16
,共7页
云地闪电%光谱%通道温度%回击电流%作用积分
雲地閃電%光譜%通道溫度%迴擊電流%作用積分
운지섬전%광보%통도온도%회격전류%작용적분
cloud-to-ground lightning%lightning spectra%channel temperature%return stroke current%action integral
依据在青海地区由无狭缝光栅摄谱仪获得的2次多回击云对地闪电的光谱，结合同步辐射电场变化资料，计算了放电等离子体的温度、光谱总强度以及回击通道的峰值电流和作用积分。对观测结果和这些参数进行对比分析，结果表明：（1）同一次地闪的不同回击过程中，光谱总强度与放电电流的大小呈正相关；（2）相邻2次回击的时间间隔较长时，等离子体通道的温度与电流作用积分基本成正比；当相邻2次回击的时间间隔较短时，通道温度与作用积分不再线性相关。
依據在青海地區由無狹縫光柵攝譜儀穫得的2次多迴擊雲對地閃電的光譜，結閤同步輻射電場變化資料，計算瞭放電等離子體的溫度、光譜總彊度以及迴擊通道的峰值電流和作用積分。對觀測結果和這些參數進行對比分析，結果錶明：（1）同一次地閃的不同迴擊過程中，光譜總彊度與放電電流的大小呈正相關；（2）相鄰2次迴擊的時間間隔較長時，等離子體通道的溫度與電流作用積分基本成正比；噹相鄰2次迴擊的時間間隔較短時，通道溫度與作用積分不再線性相關。
의거재청해지구유무협봉광책섭보의획득적2차다회격운대지섬전적광보，결합동보복사전장변화자료，계산료방전등리자체적온도、광보총강도이급회격통도적봉치전류화작용적분。대관측결과화저사삼수진행대비분석，결과표명：（1）동일차지섬적불동회격과정중，광보총강도여방전전류적대소정정상관；（2）상린2차회격적시간간격교장시，등리자체통도적온도여전류작용적분기본성정비；당상린2차회격적시간간격교단시，통도온도여작용적분불재선성상관。
The spectrum of cloud-to-ground lightning flashes with two-multiple return strokes have been obtained in the Qinghai Plat-eau by using a slitless spectrograph,the channel temperatures,the total intensity of spectrum,the peak value of current and its action in-tegral have been calculated combining the information of synchronous radiated electric field.According to the observation results and anal-ysis on them,the conclusions are as follows:(1 )The total intensity of spectra has a positive correlation with the discharge current in dif-ferent strokes of one cloud-to -ground lightning.(2)During the lightning process,if the time interval between two adjacent return strokes is relatively long,the temperature and action integral of current are close to positive correlation.Whereas if the time interval be-tween two adjacent return strokes is relatively short,the temperature and action integral had non-linear correlation each other.
