Analysis of the Characteristics of Tropospheric NO_2 in Xianghe Based on MAX-DOAS Measurement
Analysis of the Characteristics of Tropospheric NO_2 in Xianghe Based on MAX-DOAS Measurement
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发表时间：
2014
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通讯作者：
W. Tin
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作者：
W. Tin
基于多轴差分吸收光谱测量（MAX-DOAS）和中国科学院大气物理研究所香河大气综合观测站32米气象塔（香河：39.77°N，117.0°E），2010年3月至2012年2月，反演了香河地区对流层NO2垂直柱密度（VCD），并分析了其季节变化特征。结果表明，MAX-DOAS是一种有效的测量NO2 VCD的方法，在可见光455-485 nm和紫外330-370 nm波长范围内都能得到很好的恢复。香河NO2 VCD具有明显的季节变化，月平均值冬季（11月）最高，夏季（7月）最低。NO2 VCD的变化与太阳辐射强度、源排放、大气稳定度和风等因素密切相关。NO2 VCD值在东部较高，秋冬季日变化明显。
Based on the measurements by Multi-Axis Differential Optical Absorption Spectroscopy(MAX-DOAS) and the 32-m meteorological tower at Xianghe station of Atmospheric Comprehensive Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences(Xianghe: 39.77°N, 117.0°E), from March 2010 to February 2012, the tropospheric vertical column density(VCD) of NO2 in Xianghe was retrieved and its seasonal characteristics were analyzed. The results show that MAX-DOAS is an effective method for measuring NO2 VCD, which can be well retrieved from wavelength intervals of 455–485 nm in the visible and 330–370 nm in the UV range. NO2 VCD in Xianghe has an obvious seasonal variation, with its monthly mean being maximum in winter(November) and minimum in summer(July). The variation of NO2 VCD is closely related to solar radiation intensity, source emission, atmospheric stability, and wind. Higher values of NO2 VCD are observed in the eastern part of the region; the diurnal variation of NO2 VCD is obvious in autumn and winter.