悬浮颗粒物粒径分布的幂律模型研究--以黄渤海为例
Study of suspended particulate matter particle size distribu-tion based on the power-law model：Case study in the Yellow and Bohai Seas
摘要
Abstract
To accurately describe the distribution of the suspended particle size and achieve a high-precision simu-lation of the suspended particle size distribution in the Yellow and Bohai Seas, in this study, we examined the ap-plicability of the power law for simulating the particle size distribution (PSD) of suspended particles based on LISST-100 measurements from November 2014. The reference diameter, an important parameter of the power law model, affects the PSD power–law slope and PSD simulation accuracy. We analyzed the influence of different ref-erence diameters on the PSD power–law slope and PSD simulation accuracy. Our results show that most power–law-fitted PSD slopes range from 0.46 to 7.53, and 84.2% of these values are within the range of 3.20 to 4.50 (mean: 4.09). Changes in the reference diameter (D0) have a significant influence on the PSD slope and PSD simulation accuracy: when D0 < 7.33 μm, significant changes occur. PSD slopes ranged from 0.46 to 7.53 (mean =5.60, standard deviation = 1.09) and large errors (mean absolute percentage errors (EMAP): 20%–85%, mean EMAP:48.2%) were observed in PSD slope and PSD simulation, respectively. When 7.33 μm < D0 < 19.8 μm, the PSD slope was 4.08 ± 0.0.29 and the PSD simulation error was small (EMAP: 5%—25%, mean EMAP: 9.8%). When D0 >19.8 μm, the PSD slope was 3.87 ± 0.25, and PSD simulation error was at a minimum (EMAP: 2%—10%, mean EMAP:6.0%). Through error analysis, we found that for the reference diameter selection greater than 19.8 μm, the PSD simulation results fitted well. We found the optimal reference diameter to be 122.0 μm, at which the simulation er-ror was at a minimum (mean EMAP is 4.79% ± 1.78%).关键词
黄渤海/悬浮颗粒物/颗粒粒径分布/幂律模型/参考粒径/LISST-100Key words
Yellow Sea and Bohai Sea/suspended particulate matter/particle size distribution/power-law model/reference diameter/LISST-100 instrument分类
海洋科学引用本文复制引用
彭田,丘仲锋,孙德勇,王胜强..悬浮颗粒物粒径分布的幂律模型研究--以黄渤海为例[J].海洋科学,2016,40(6):110-118,9.基金项目
国家自然科学基金项目(41276186,41576172,41506200) （41276186,41576172,41506200）
江苏省自然科学基金项目(BK20151526, BK20150914) （BK20151526, BK20150914）
江苏省高校自然科学基金项目(15KJB170015) （15KJB170015）
“全球变化与海气相互作用”专项(GASI03030101) （GASI03030101）
江苏省“青蓝工程”优秀青年骨干教师项目 （）
江苏高校优势学科建设工程资助项目(PAPD) （PAPD）
国家海洋公益性行业专项项目(201005030)@@@@[Foundation：National Natural Science Foundation of China, No.41276186, No.41576172, No.41506200 （201005030）
Provinoial Natural Science Foundation of Jiangsu in China, No. BK20151526, No.BK20150914 （）
Natural Science Foundation of the Jiangsu Higher Eduation Istitutions of China, No.15KJB170015 （）
National Programme on Global Change and Air-sea Interaction, No.GASI03030101 （）
Qing Lan Project （）
Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD) （PAPD）
Public Science and Technology Research Funds Projects of Ocean, No.201005030] （）
