研究报告
刘洋洋,刘宏庆,王振乾,方金福,赵欣鑫.辽宁省近12年对流层甲醛柱浓度时空变化及其影响因素[J].环境科学学报,2018,38(2):618-628
辽宁省近12年对流层甲醛柱浓度时空变化及其影响因素
- Spatial-temporal changes of tropospheric HCHO column density and its impact factors over Liaoning Province during 2005-2016
- 基金项目：
- 作者
- 单位
- 刘洋洋
- 西北师范大学地理与环境科学学院, 兰州 730070
- 刘宏庆
- 西北师范大学地理与环境科学学院, 兰州 730070
- 王振乾
- 兰州大学资源环境学院, 兰州 730000
- 方金福
- 西北师范大学地理与环境科学学院, 兰州 730070
- 赵欣鑫
- 西北师范大学地理与环境科学学院, 兰州 730070
- 摘要：基于OMI遥感反演的对流层甲醛柱浓度资料，研究了辽宁省2005-2016年对流层甲醛柱浓度的时空分布特征，并分析了对流层甲醛柱浓度的主要影响因素.结果表明：近12年辽宁省对流层甲醛柱浓度整体上波动较大，2005-2013年逐渐增大，平均增速为0.74×1015 molec·cm-2，空间分布上整体表现为低值区主要分布在辽西山地丘陵地区，高值区分布在沈阳以东大部分地区，浓度在12×1015~13×1015 molec·cm-2之间；2005-2008年辽宁省甲醛污染相对较轻，对流层甲醛柱浓度整体多在3级水平以下；2009-2013年之间，对流层甲醛柱浓度的3级分布区域逐渐缩小，4级分布区域不断扩大，并在2010年出现5级水平污染区域且于2013年达到最大.春季各个区域对流层甲醛柱浓度相对于其它季节较低，夏季各个地区对流层甲醛柱浓度值整体上高于其它季节，以4级及5级水平污染为主，秋、冬季各个区域的对流层甲醛柱浓度值分布居于春、夏两季之间.辽宁省对流层甲醛柱浓度的月变化特征大致符合正弦曲线分布特征，即对流层甲醛柱浓度自1月不断上升，于6月达到峰值后又不断下降.能源消耗及工业生产与大气中甲醛的浓度的变化息息相关，人口数量及生产总值与对流层甲醛柱浓度也具有显著的正相关关系.高温利于甲醛的扩散和挥发，辽宁省独特的地形地理位置对甲醛的扩散与传播产生影响.
- Abstract：Based on remote sensing data derived from OMI sensor of Liaoning Province from 2005 to 2016, spatial-temporal changes of tropospheric HCHO column density and the main influencing factors were studied. The results showed that:HCHO column density fluctuated comparatively largely in recent 12 years, and gradually increased from 2005 to 2013, which average growth rate was 0.74×1015 molec·cm-2. The low value area were mainly distributed in the hilly areas of western Liaoning, and the high value areas were distributed in the eastern part of Shenyang, where the density was between 12×1015~13×1015 molec·cm-2. From 2005 to 2008, the pollution of HCHO in Liaoning Province was relatively light, and the HCHO column density was mostly below the tertiary level. From 2009 to 2013, the three-level distribution area of the HCHO column was gradually reduced, and the four-stage distribution area was continuously expanded, and the five levels of pollution appeared in 2010 and reached the maximum in 2013. The tropospheric HCHO column density of spring was lower than that of other seasons in each area, while the HCHO column density of summer was higher than other seasons in every area, which all of them were in the range of 11×1015~15×1015 molec·cm-2. The HCHO column density in the autumn and winter were between spring and summer. The monthly variation of the HCHO column density in Liaoning Province is consistent with the distribution of sinusoidal curve, which is, the concentration of HCHO column density has been increasing since January, and then peaked in June. Energy consumption and industrial production are closely related to changes in the HCHO density in the atmosphere, and the population and GDP have a significant positive correlation with the HCHO density. The high temperature favors the diffusion and volatilization of HCHO, and the unique terrain and geographical location of Liaoning Province has an effect on the diffusion and propagation of HCHO.
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