Atmospheric nitrous oxide observations above the oceanic surface during CHINARE-18

作者：Zhu RB; Sun LG^*; Liu XD

来源：Progress in Natural Science, 2003, 13(8): 615-619.

DOI：10.1080/10020070312331344130

• Antarctica
• the Pacific Ocean
• nitrous oxide
• vacuum vial

The gas samples in the marine boundary layer were collected from the track for research ship Xuelong during the 18th Chinese Antarctic Research Expedition (CHINARE-18) and nitrous oxide measurements were made by HP5890ECD-GC in the laboratory. The results represent the shipboard N2O data set obtained within the lower troposphere with the average concentration of (313.5 +/- 2.6) nL.L-1 from 31degreesN to 69degreesS. The results showed a latitudinally weighted, mean interhemispheric difference of 0.61 nL.L-1. The latitudinal distribution of atmospheric N2O Concentration was analyzed from northern midlatitudes to Southern Ocean around the Antarctic continent and it was showed that N2O concentration in the current confluences was higher than that in other oceanic areas. This indicated that strong N2O emissions occurred there. The longitudinal distribution of N2O concentrations in the Southern Ocean also showed similar situation. According to the interhemispheric difference of atmospheric N2O concentrations and the two-box model, we estimated that 2/5 of the global flux of N2O into the atmosphere is derived from the sources in the southern hemisphere.

• 出版日期2003-8
• 单位中国科学技术大学