The relationship between air and water temperatures in lakes of the Swiss Plateau: a case study with palaeolimnological implications
The relationship between air and water temperatures in lakes of the Swiss Plateau: a case study with palaeolimnological implications
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DOI：
10.1023/a:1007904817619
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发表时间：
1998-02-01
影响因子：
2.1
通讯作者：
Lotter, AF
中科院分区：
文献类型：
--
作者：
Livingstone, DM;Lotter, AF
在古湖泊学研究中，基于水生生物的推断模型经常被用于估算夏季湖泊地表水温。然而，由于实测水温数据的稀疏性，这些模型的校准往往不能令人满意。本研究通过比较瑞士高原上17个湖泊的区域气温和地表水温度，调查了使用通常具有更高分辨率的气温数据来校准这些模型的可行性。结果表明，经过高度校正的气温在整个瑞士高原上是足够均匀的，可以根据标准复合气温序列充分估计任何特定湖泊地点的当地气温。在初夏，气温的日变化极好地反映在水柱最上层的温度上，而月平均气温在绝对值和年际变化方面与大部分地区的水温相对应。因此，为了校准湖泊温度推断模型，标准化的海拔校正空气温度序列可能是一个有用的替代地表水温度的方法。在北半球温带地区，平均气温和水温可能在7月份最接近，这表明校准和重建工作将集中在这个月。
In palaeolimnological studies, inference models based on aquatic organisms are frequently used to estimate summer lake surface water temperatures. However, the calibration of such models is often unsatisfactory because of the sparseness of measured water temperature data. This study investigates the feasibility of using air temperature data, usually available at much higher resolution, to calibrate such models by comparing regional air temperatures with surface water temperatures in 17 lakes on the Swiss Plateau. Results show that altitude-corrected air temperatures are sufficiently uniform over the entire Swiss Plateau to allow local air temperatures at any particular lake site to be adequately estimated from standard composite air temperature series. In early summer, day-to-day variability in air temperature is reflected extremely well in the temperature of the uppermost metre of the water column, while monthly mean air temperatures correspond well, with respect to both absolute value and interannual variations, with water temperatures in most of the epilimnion. Standardised altitude-corrected air temperature series may therefore be a useful alternative to surface water temperatures for the purposes of calibrating lake temperature inference models. In Northern Hemisphere temperate regions, mean air and water temperatures are likely to correspond most closely in July, suggesting that calibration and reconstruction efforts be concentrated on this month.