Publications by authors named "Alon Rimmer"
Article Synopsis
- Climate change has altered the thermal structure of lakes, impacting both surface and deep water temperatures, though surface changes are more documented than deepwater trends.
- This study presents a comprehensive dataset of vertical temperature profiles from 153 lakes, starting from as early as 1894, allowing for a deeper analysis of long-term trends.
- The researchers also collected various geographic and water quality data to understand how different factors influence the thermal structures of these lakes amid ongoing environmental changes.
Article Synopsis
- Global lake surface water temperatures have warmed at an average rate of +0.37 °C per decade, while deepwater temperatures have shown minimal average change (+0.06 °C per decade), but with high variability among individual lakes.
- The study analyzed long-term vertical temperature data from 1970-2009 to uncover trends and influences on lake thermal structures.
- The variability in deepwater temperature trends is not fully explained by surface temperatures or internal lake factors, suggesting that broader climate patterns or human activities play a significant role in these long-term changes.
In water-limited regions worldwide, climate change and population growth threaten to desiccate lakes. As these lakes disappear, water managers have often implicated climate change-induced decreases in precipitation and higher temperature-driven evaporative demand-factors out of their control, while simultaneously constructing dams and drilling new wells into aquifers to permit agricultural expansion. One such shrinking lake is the Sea of Galilee (Lake Kinneret), whose decadal mean level has reached a record low, which has sparked heated debate regarding the causes of this shrinkage.
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- Ecological and biogeochemical processes in lakes are highly influenced by water temperature, with long-term surface warming being a clear trend, yet little research has been done on daily temperature variations.
- A study analyzed high-frequency temperature data from 100 lakes and found that smaller lakes (under 3 km²) experience significant daily temperature changes in the summer, often between 4 and 7°C.
- These daily fluctuations are likely to impact the ecological and biochemical dynamics of lakes, but the broader implications of these findings need further investigation.
Global environmental change has influenced lake surface temperatures, a key driver of ecosystem structure and function. Recent studies have suggested significant warming of water temperatures in individual lakes across many different regions around the world. However, the spatial and temporal coherence associated with the magnitude of these trends remains unclear.
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