Synchrony in relationships between the North Atlantic Oscillation and water chemistry among Sweden’s largest lakes
Synchrony in relationships between the North Atlantic Oscillation and water chemistry among Sweden’s largest lakes
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北大西洋涛动与瑞典最大湖泊水化学之间关系的同步性
DOI：
10.4319/lo.2004.49.4.1191
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
G. Weyhenmeyer
中科院分区：
文献类型：
--
作者：
G. Weyhenmeyer
北大西洋涛动（NAO）通常被视为一种简单可靠的指标，可用于研究气候对水生生态系统的影响。在此，应用北大西洋涛动冬季指数（NAOW）来确定冬季气候变化对瑞典三个最大湖泊（维纳恩湖、韦特恩湖和梅拉伦湖）16个地点每月测量的13种水化学变量的影响。NAOW对气象、物理条件有强烈影响，进而也对化学条件产生影响。在瑞典的三个最大湖泊中，显著的相关关系众多，但在湖泊之间甚至在同一湖泊内都鲜有一致性。湖泊各站点的NAOW与水化学之间的同步关系仅限于与地表水温度密切相关的变量（即5月的活性二氧化硅和pH值）。湖泊变量与水温的关联越弱，该变量在16个湖泊站点上的平均NAOW信号就越弱。这项研究的结果可能有助于预测湖泊生态系统对大区域未来天气变化的响应。
The North Atlantic Oscillation (NAO) is commonly presented as an easy and reliable index that can be used to study climatic effects on aquatic ecosystems. Here, the NAO winter index (NAOW) was applied to determine effects of winter climate changes on 13 water chemical variables measured monthly at 16 sites in Sweden’s three largest lakes (Vänern, Vättern, and Mälaren). The NAOW strongly affected meteorological, physical, and consequently also chemical conditions. Significant relationships were numerous in Sweden’s three largest lakes, but they exhibited little agreement among lakes and even across a lake. Synchronous relationships between the NAOW and water chemistry among lake sites were restricted to variables closely linked to surface‐water temperature (i.e., reactive silica and pH in May). The weaker the association of a lake variable with water temperature, the weaker the mean NAOW signal on the variable over the 16 lake sites. The results of this study might facilitate the prediction of lake ecosystem responses to future changes in the weather over a large region.