Evidence for upwelling of corrosive "acidified" water onto the continental shelf
Evidence for upwelling of corrosive "acidified" water onto the continental shelf
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DOI：
10.1126/science.1155676
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发表时间：
2008-06-13
期刊：
影响因子：
56.9
通讯作者：
Hales, Burke
中科院分区：
文献类型：
--
作者：
Feely, Richard A.;Sabine, Christopher L.;Hales, Burke
海洋吸收大气中的二氧化碳 (CO2) 会降低水域的 pH 值。这种所谓的海洋酸化可能会对海洋生态系统产生重要影响。为了更好地了解沿海水域海洋酸化的程度，我们沿着北美西部大陆架从加拿大中部到墨西哥北部进行了水文调查。我们观察到文石未饱和的海水上涌到大陆架的大部分区域，沿着大多数横断线达到约 40 至 120 米的深度，并在北加州附近的一条横断线上一直到达地表。虽然不饱和水域季节性上涌到大陆架上是该地区的自然现象，但海洋对人为二氧化碳的吸收增加了受影响区域的面积。
The absorption of atmospheric carbon dioxide (CO2) into the ocean lowers the pH of the waters. This so-called ocean acidification could have important consequences for marine ecosystems. To better understand the extent of this ocean acidification in coastal waters, we conducted hydrographic surveys along the continental shelf of western North America from central Canada to northern Mexico. We observed seawater that is undersaturated with respect to aragonite upwelling onto large portions of the continental shelf, reaching depths of similar to 40 to 120 meters along most transect lines and all the way to the surface on one transect off northern California. Although seasonal upwelling of the undersaturated waters onto the shelf is a natural phenomenon in this region, the ocean uptake of anthropogenic CO2 has increased the areal extent of the affected area.