Amplified surface temperature response of cold, deep lakes to inter-annual air temperature variability.
Amplified surface temperature response of cold, deep lakes to inter-annual air temperature variability.
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DOI：
10.1038/s41598-017-04058-0
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发表时间：
2017-06-23
影响因子：
4.6
通讯作者：
Merchant CJ
中科院分区：
文献类型：
--
作者：
Woolway RI;Merchant CJ
与当地夏季表层气温(SAT)相比，夏季湖泊表面水温(LSWTs)对气候变暖的响应速度更快。在全球尺度的分析中，我们利用144个湖泊20年的卫星温度，探索了支持夏季LSWT对SAT变率放大响应的因素。结果表明，夏季LSWT的年际放大程度是不同的，以变暖季节短为特征的冷湖(如高纬度和高海拔)和由于热惯性增加而表现出长相关温度异常时间尺度的深湖的放大程度更大。这样的湖泊更有可能表现出超过当地夏季SAT年际变化的响应。LSWT的气候变化对水质和湖泊生态系统有许多后果，因此在全球范围内量化这种放大的反应是重要的。
Summer lake surface water temperatures (LSWTs) have previously been shown to respond more rapidly to climatic warming compared to local summer surface air temperatures (SATs). In a global-scale analysis, we explore the factors underpinning the observation of an amplified response of summer LSWT to SAT variability using 20 years of satellite-derived temperatures from 144 lakes. We demonstrate that the degree of amplification in inter-annual summer LSWT is variable, and is greater for cold lakes (e.g. high latitude and high altitude), which are characterised by a short warming season, and deep lakes, that exhibit long correlation timescales of temperature anomalies due to increased thermal inertia. Such lakes are more likely to display responses in excess of local inter-annual summer SAT variability. Climatic modification of LSWT has numerous consequences for water quality and lake ecosystems, so quantifying this amplified response at a global scale is important.