Publications by authors named "Klaus D Joehnk"
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.
Integrating Inland and Coastal Water Quality Data for Actionable Knowledge.
Remote Sens (Basel)
July 2021
Article Synopsis
- - Water quality data for inland and coastal waters come from various sources, including professional and volunteer monitoring programs, automated sensors, and remote sensing, which when combined provide better insights for ecosystem management.
- - Recent advancements allow for improved scaling and integration of this data across different regions, leveraging satellite technology to enhance understanding and accessibility of water quality information.
- - The paper reviews current data integration frameworks and identifies gaps, proposing a new framework under the GEO AquaWatch Initiative to enhance global access and application of water quality data for effective resource management and decision-making.
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.
Despite the enticing discoveries of chaos in nature, triggers and drivers of this phenomenon remain a classical enigma which needs irrefutable empirical evidence. Here we analyze results of the yearlong replicated mesocosm experiment with multi-species plankton community that allowed revealing signs of chaos at different trophic levels in strictly controlled abiotic environment. In mesocosms without external stressors, we observed the "paradox of chaos" when biotic interactions (internal drivers) were acting as generators of internal abiotic triggers of complex plankton dynamics.
View Article and Find Full Text PDFUnder limited time and resources, ecological managers are under increasing pressure to demonstrate tangible impact of monitoring activities. Value of Information (VOI) has been advocated as an ideal tool to evaluate whether more data is required to improve expected management outcomes. Yet, despite several recent works explaining its value, VOI remains seldom used in practice.
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