中国海洋大学学报（自然科学版）
中國海洋大學學報（自然科學版）
중국해양대학학보（자연과학판）
PERIODICAL OF OCEAN UNIVERSITY OF CHINA
2010年
4期
1-8
,共8页
下行辐照度%海洋光学%云%雾%海浪
下行輻照度%海洋光學%雲%霧%海浪
하행복조도%해양광학%운%무%해랑
dowelling irradiance%marine optical%cloud%frog%ocean wave
海洋光学考察时需要同步测量大气中的下行太阳辐照度,其测量采样频率比常规大气辐射观测高300倍,可记录到达海面太阳辐射的高频变化.利用2007年在白令海考察的数据,详细研究了辐照度高频变化的特征与原因,得出影响辐照度记录的主要因素有云层、海雾和海浪.结果表明,这3种因素的影响有明显的差别,使作者有可能在不确切知道现场情况的条件下,由数据本身判断辐照度变化的原因,并获取有关的参数.云层引起的辐照度变化具有低频率、大振幅的特征.海雾引起的辐照度变化最为复杂,变化幅度大,变化周期复杂,从几秒到上百秒,与云层效应相区别.晴空条件下,海浪调制的反射信号通过空气中的水汽散射影响辐照度计测量数值,形成周期短、振幅小的稳定振动信号,与云和雾的效应有明显区别.文中提供了云、雾和浪对辐照度影响的定性特征和定量分析结果,对理解海面辐照度记录,并正确处理数据有指导意义.
海洋光學攷察時需要同步測量大氣中的下行太暘輻照度,其測量採樣頻率比常規大氣輻射觀測高300倍,可記錄到達海麵太暘輻射的高頻變化.利用2007年在白令海攷察的數據,詳細研究瞭輻照度高頻變化的特徵與原因,得齣影響輻照度記錄的主要因素有雲層、海霧和海浪.結果錶明,這3種因素的影響有明顯的差彆,使作者有可能在不確切知道現場情況的條件下,由數據本身判斷輻照度變化的原因,併穫取有關的參數.雲層引起的輻照度變化具有低頻率、大振幅的特徵.海霧引起的輻照度變化最為複雜,變化幅度大,變化週期複雜,從幾秒到上百秒,與雲層效應相區彆.晴空條件下,海浪調製的反射信號通過空氣中的水汽散射影響輻照度計測量數值,形成週期短、振幅小的穩定振動信號,與雲和霧的效應有明顯區彆.文中提供瞭雲、霧和浪對輻照度影響的定性特徵和定量分析結果,對理解海麵輻照度記錄,併正確處理數據有指導意義.
해양광학고찰시수요동보측량대기중적하행태양복조도,기측량채양빈솔비상규대기복사관측고300배,가기록도체해면태양복사적고빈변화.이용2007년재백령해고찰적수거,상세연구료복조도고빈변화적특정여원인,득출영향복조도기록적주요인소유운층、해무화해랑.결과표명,저3충인소적영향유명현적차별,사작자유가능재불학절지도현장정황적조건하,유수거본신판단복조도변화적원인,병획취유관적삼수.운층인기적복조도변화구유저빈솔、대진폭적특정.해무인기적복조도변화최위복잡,변화폭도대,변화주기복잡,종궤초도상백초,여운층효응상구별.청공조건하,해랑조제적반사신호통과공기중적수기산사영향복조도계측량수치,형성주기단、진폭소적은정진동신호,여운화무적효응유명현구별.문중제공료운、무화랑대복조도영향적정성특정화정량분석결과,대리해해면복조도기록,병정학처리수거유지도의의.
The downwelling irradiance at the sea surface and some factors are simultaneously measured during the marine optical observation with much higher sampling rate of 0.2 s, which is benefit to study the high-frequency variation in the irradiance record. The data obtained by the authors in Bering Sea of 2007 spring is used to analyze main factors causing the high-frequency variation of the irradiance. The influences of cloud, fog, and sea wave on the irradiance are distinguishable from our data itself. It thus is possible for us to judge and calculate the impact from different factors without detailed in situ information. The variations of irradiance by the cloud are usually with lower frequency and higher amplitude. Whereas those caused by fog express complex variation with higher amplitude and varying periods from several to a hundred seconds. The complexity is useful to distinguish fog influence from that of cloud. Under the clear sky condition, the steady incident solar radiation is reflected at the sea surface, modulated by the wave oscillation, and then scattered from the particles in the air to the collector of the instrument. So the sea wave signal appears in the irradiance record with short period and low amplitude, clearly different from the influence of cloud and fog. In this study, the influence of cloud, fog, and wave on irradiance is analyzed and calculated, which is valuable for understanding the irradiance and the corresponding variation in the under water record.
