Small lakes show muted climate change signal in deepwater temperatures
Small lakes show muted climate change signal in deepwater temperatures
复制标题
小湖泊在深水温度下显示出微弱的气候变化信号
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Paul C. Hanson
中科院分区：
文献类型：
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作者：
L. Winslow;J. Read;Gretchen J. A. Hansen;Paul C. Hanson
研究人员从美国威斯康辛州的142个湖泊收集了水温观测数据，以研究暴露在类似区域气候下的湖泊的温度变化。1990 ~ 2012年，全湖温度呈上升趋势，平均趋势为0.042°C /年±0.01°C /年。在大型湖泊（0.5 km2）中，所有深度的正温度趋势相似。在小湖泊（<0.5 km2），升温趋势仅限于浅水，在最大湖深0.5倍的水域没有明显的升温趋势。小湖与大湖的不同响应可能是由于避风降低了小湖湍流混合强度的结果。这些结果表明，小湖泊对气候变化的响应不同于大湖泊，这表明目前对气候变化对湖泊影响的预测可能需要修改。
Water temperature observations were collected from 142 lakes across Wisconsin, USA, to examine variation in temperature of lakes exposed to similar regional climate. Whole lake water temperatures increased across the state from 1990 to 2012, with an average trend of 0.042°C yr−1 ± 0.01°C yr−1. In large (>0.5 km2) lakes, the positive temperature trend was similar across all depths. In small lakes (<0.5 km2), the warming trend was restricted to shallow waters, with no significant temperature trend observed in water >0.5 times the maximum lake depth. The differing response of small versus large lakes is potentially a result of wind‐sheltering reducing turbulent mixing magnitude in small lakes. These results demonstrate that small lakes respond differently to climate change than large lakes, suggesting that current predictions of impacts to lakes from climate change may require modification.