Seasonal variation of atmospheric210Pb and Al in the western North Pacific region

✍ Scribed by Shizuo Tsunogai; Takayoshi Kurata; Toshitaka Suzuki; Khchiro Yokota

• Publisher: Springer Netherlands
• Year: 1988
• Tongue: English
• Weight: 831 KB
• Volume: 7
• Category: Article
• ISSN: 0167-7764
• DOI: 10.1007/bf00058712

✦ Synopsis

The atmospheric concentration of 2l°pb was determined for two years at six stations in the western North Pacific region. The following results were obtained and discussed by comparing them with those of AI. The atmospheric concentration of 2~°Pb varied widely from week to week, but the degree of variation was about a half that of A1. Contrary to AI, the year-to-year variation of -'l°Pb was not pronounced and its seasonal variation was well expressed by a sine curve. The 2J°pb concentration did not show a marked latitudinal variation and its base-line concentration was high in the surface air over the North Pacific. These suggest that the atmospheric 2r°pb has a longer residence time, due to its transportation through higher altitudes and deposits much more evenly onto the Earth's surface and the ocean, as compared with AI in mineral dust which is larger in size in the source region.