| 彭艳梅,高磊,王舒,肖高翔,何清,刘新春.塔克拉玛干沙漠腹地气溶胶不同波段散射系数比较[J].沙漠与绿洲气象,2018,12(3):26~32 |
| 塔克拉玛干沙漠腹地气溶胶不同波段散射系数比较 |
| Comparison of Scattering Coefficients of Different Aerosols in the Hinterland of Taklimakan Desert |
| 投稿时间：2017-04-25 修订日期：2017-06-14 |
| DOI：10.12057/j.issn.1002-0799.2018.03.004 |
| 中文关键词: 散射系数 波段 沙尘气溶胶 塔克拉玛干沙漠 |
| 英文关键词:scattering coefficient band dust aerosols Taklimakan desert |
| 基金项目:新疆维吾尔自治区自然科学基金(2016D01A078)资助 |
|
| 摘要点击次数: 989 |
| 全文下载次数: 732 |
| 中文摘要: |
| 利用2010年塔克拉玛干沙漠腹地塔克拉玛干沙漠大气环境观测试验站(简称：塔中试验站)多波段（450nm、525nm、635nm）积分浊度计和PM10自动监测仪观测资料，并结合塔中地面气象观测资料，分析了沙漠腹地不同波段气溶胶散射系数的变化特征。分析结果显示：（1）塔中气溶胶对635nm太阳辐射的散射作用最大，其次是525nm，最小为450nm。三波段散射系数平均值分别（从450nm到635nm）为：288.0Mm-1、318.4Mm-1、443.8Mm-1。（2）三波段散射系数日变化与PM10质量浓度一致，都呈单峰变化：夜间高、白天低。在整个日变化中，散射系数始终保持635nm最大，525nm次之，450nm最小。（3）三波段散射系数年变化基本一致，都与PM10变化接近。1到5月中，除3月散射系数是450nm最大外，另外4个月均是635nm最大，450nm次之，525nm最小。6到12月散射系数都是635nm最大，525nm次之，450nm最小。（4）三波段散射系数均是沙尘暴下最大，扬沙次之，浮尘最小。不同沙尘天气下，塔中气溶胶对635nm散射作用都是最明显的，对450nm和525nm散射作用不同：沙尘暴时，对525nm的散射强于450nm，在扬沙和浮尘时，对450nm的散射强于525nm，尤其在浮尘时。（5）三波段散射系数与PM10质量浓度都显著正相关，PM10质量浓度与525nm散射系数相关程度最大，450nm次之，635nm最小。但是季节内相关程度略有差异：春、冬季PM10浓度与450nm散射系数相关程度最大，525nm次之，635n最小。夏、秋季则是525nm最大。 |
| 英文摘要: |
| The observation data of multi-band(450nm、525nm、635nm)integral nephelometer and PM10 automatic monitor of Taklamakan Desert atmosphere Observation Station (referred to as: Tazhong Test Station) in 2010 was used to analyze the various factors of atmospheric aerosol scattering coefficient in different bands in Tazhong .The results showed that:(1) Aerosol in Tazhong had the largest scattering effect on 635nm solar radiation, and the effect on 525nm was larger than that on 450nm. The average of the three-band scattering coefficients (from 450nm to 635nm) were 288.0Mm-1,318.4Mm-1, 443.8Mm-1. (2) The scattering coefficient in three bands changed in same single peak with concentration of PM10, and the change had a distinct diurnal variation. The scattering coefficient in the three bands always kept changing in the following way :635nm>525nm> 450nm。(3) The scattering coefficient of three bands changed in the same way with PM10. Except March, the scattering coefficient of three bands ranked in the following way from January to May: 635nm>450nm>525nm. But the scattering coefficient of three bands ranked in another way from June to December: 635nm>525nm> 450nm。(4) The scattering coefficient of three bands ranked in different dust weather in the following way :dust storm＞ sand＞dust. The aerosol in the Tazhong had the most obvious scattering effect on 635nm in each dust weather, but there was different scattering effect between 450nm and 525nm in sand and dust. The scattering coefficient of 525nm was bigger than 450nm in sandstorm, especially in dust. (5) The scattering coefficient of the three bands was positively correlated with the mass concentration of PM10, and the concentration coefficient ranked in the following way :525nm＞450nm＞635nm. But the correlation was slightly different in different season: The concentration coefficient of three bands in Spring and Winter ranked in the following way: 450nm＞525nm＞635nm, but the largest concentration coefficient of three bands was 525nm. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| 关闭 |