北黄海大气氮氧化物的季节分布

根据2006年夏季2、007年冬春秋四个季节分别对北黄海进行的大面调查,分析研究了四季氮氧化物(NOx)的季节变化和浓度分布。结果显示,大气NOx浓度呈现明显的季节变化,表现为冬季>夏季>秋季>春季,冬季北黄海空气中NOx浓度的平均值分别是春季的4倍、夏季的2倍和秋季的2.1倍。NOx浓度在北黄海的不同区域特征呈现为近岸向远岸逐渐降低的趋势,说明陆源污染物对北黄海NOx分布有较大影响。

Seasonal Distribution of Nox over the Northern Yellow Sea

The seasonal variation and concentration distribution of NOx samples over the Northern Yellow Sea were investigated in summer of 2006,and winter、spring and autumn of 2007.The results showed that the concentrations of NOx had obvious seasonal variation,the seasonal variation trends of NOx were winter summer autumn spring,with winter values being 4、2 and 2.1 times higher than spring、summer and autumn ones,respectively.The spatial distribution of NOx was typically such that the concentrations of NOx decreased from inshore to offshore area,indicating that the pollution from the land had great effect on the distributions of NOx over the Northern Yellow Sea.