本文選題：激光雷達　切入點：掃描觀測　出處：《中國環(huán)境科學》2017年11期 　論文類型：期刊論文

【摘要】：2015年6月11日在河北省石家莊市組織了一次激光雷達水平掃描觀測實驗,并通過動態(tài)閾值法提取了區(qū)域散布污染源的位置及傳輸路徑.結果顯示,近地面氣溶膠空間分布不均勻,強排放點污染源的污染物水平傳輸距離可達4km.水平掃描觀測模式不受地表類型影響,可以獲得高空間分辨率的近地面氣溶膠空間分布.不同高度角的測試觀測表明,應盡量將觀測點設置在區(qū)域高點并采用水平方式開展掃描.在污染區(qū)域提取環(huán)節(jié),可利用代表區(qū)域本底大氣的能見度來確定消光系數(shù)動態(tài)閾值,增強對于相對污染程度特征的提取效果.
[Abstract]:In June 11th 2015, a laser radar horizontal scanning observation experiment was conducted in Shijiazhuang City, Hebei Province, and the location and transmission path of regional dispersion sources were extracted by dynamic threshold method. The results show that, The spatial distribution of aerosols near the surface is not uniform, and the horizontal transport distance of pollutants from the source of strong emission points can reach 4km. the horizontal scanning observation model is not affected by the surface type. The spatial distribution of aerosols near the ground with high spatial resolution can be obtained. The measurements at different altitude angles show that the observation points should be set at the high point of the area and scan in a horizontal manner. The dynamic threshold of extinction coefficient can be determined by the visibility representing the background atmosphere of the region, and the extraction effect of the feature of relative pollution degree can be enhanced.
【作者單位】： 中國科學院遙感與數(shù)字地球研究所國家環(huán)境保護衛(wèi)星遙感重點實驗室;中國科學院大學;河北省環(huán)境監(jiān)測中心站;
【基金】：中國科學院科技服務網絡計劃(STS)區(qū)域重點資助項目(KFJ-STS-QYZD-022) 國家自然科學基金資助項目(41671367) 河北省科技計劃資助項目(15273909)
【分類號】：X831
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本文編號：1556283