毫米波雷達(dá)在小尺度云霧系統(tǒng)監(jiān)測(cè)中的應(yīng)用

doi:10.12306/2019jms.0051

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毫米波雷達(dá)在小尺度云霧系統(tǒng)監(jiān)測(cè)中的應(yīng)用
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                        10.12306/2019jms.0051
                    
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中圖分類號(hào):P458.2
基金項(xiàng)目:寧波市科技計(jì)劃項(xiàng)目（202003N4194；2019C50004）；浙江省基礎(chǔ)公益研究計(jì)劃項(xiàng)目（LGF21D050003）；寧波市氣象科技計(jì)劃項(xiàng)目（NBQX2017010B）；浙江省氣象科技計(jì)劃項(xiàng)目（2018QN09）

Application of millimeter wave radar in small scale weather system

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運(yùn)用毫米波雷達(dá)結(jié)合地面觀測(cè)對(duì)2017年4月15-16日發(fā)生在寧波北部海域的大范圍大霧天氣過(guò)程進(jìn)行了分析。結(jié)果表明:毫米波雷達(dá)可以實(shí)現(xiàn)對(duì)10 km左右的液態(tài)水系統(tǒng)、千米左右游離液態(tài)水團(tuán)和更小尺度的局地短時(shí)液態(tài)水團(tuán)等進(jìn)行有效監(jiān)測(cè)。10 km尺度的液態(tài)水系統(tǒng)過(guò)境使站點(diǎn)的能見度呈現(xiàn)深V型變化;未有液態(tài)水系統(tǒng)過(guò)境的站點(diǎn),在靠近液態(tài)水系統(tǒng)時(shí)也會(huì)出現(xiàn)能見度變化。千米尺度的游離液態(tài)水團(tuán)對(duì)能見度也有很強(qiáng)的影響,是造成無(wú)液態(tài)水系統(tǒng)過(guò)境時(shí)能見度急劇變化的主要原因之一。更小尺度的局地短時(shí)液態(tài)水團(tuán)的形成與局地其他因素關(guān)系緊密,不能單以雷達(dá)反射率來(lái)進(jìn)行分析。能見度的變化主要受毫米波雷達(dá)反射率相關(guān)因素和氣象要素兩者影響,約各占40%左右,毫米波雷達(dá)的應(yīng)用將未確定因素導(dǎo)致的能見度變化次數(shù)降低到了20%以下。

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By using millimeter wave radar combined with ground observation station, the large-scale fog weather process in the northern sea area of Ningbo from the night of 15 to the morning of 16, April 2017 was analyzed. Results show that the millimeter wave radar can effectively monitor the liquid water system of about 10 km, free liquid water mass of about km and local short-term liquid water mass of smaller scale.The 10 km scale liquid water system transit makes the visibility of the station show a deep V-shaped change. The visibility of the station that is not transited by the liquid water system will also change when it is close to the liquid water system. Kilometer scale free liquid water mass also has a strong impact on visibility, which is one of the main reasons for the sharp change of visibility when there is no liquid water system. The formation of smaller scale local short-time liquid water mass is closely related to other local factors, so it cannot be analyzed by radar reflectivity alone. The change of visibility is mainly affected by both millimeter wave radar reflectivity related factors and meteorological factors, accounting for about 40% respectively. The application of millimeter wave radar reduces the number of visibility changes caused by uncertain factors to less than 20%.

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岑炬輝,唐世浩,胡利軍,涂小萍,姚日升.毫米波雷達(dá)在小尺度云霧系統(tǒng)監(jiān)測(cè)中的應(yīng)用.氣象科學(xué),2021,41(6):844-852 CEN Juhui, TANG Shihao, HU Lijun, TU Xiaoping, YAO Risheng. Application of millimeter wave radar in small scale weather system. Journal of the Meteorological Sciences,2021,41(6):844-852

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收稿日期:2019-09-02
最后修改日期:2019-11-27
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在線發(fā)布日期: 2022-01-10
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