scholarly journals Crossing the Boundaries of Physical Limnology

Eos ◽  
2014 ◽  
Vol 95 (44) ◽  
pp. 403-403 ◽  
Author(s):  
Marco Toffolon ◽  
Sebastiano Piccolroaz ◽  
Damien Bouffard
Keyword(s):  
Physical Limnology

The acidic mine pit lakes of the Iberian Pyrite Belt: An approach to their physical limnology and hydrogeochemistry

2008 ◽  
Vol 23 (5) ◽  
pp. 1260-1287 ◽  
Author(s):  
Javier Sánchez España ◽  
Enrique López Pamo ◽  
Esther Santofimia Pastor ◽  
Marta Diez Ercilla
Keyword(s):  
Iberian Pyrite Belt ◽  
Physical Limnology ◽  
Pit Lakes

scholarly journals Ulyssys Water Quality Viewer Technical Description Supplementary

2020 ◽  
Author(s):  
András Zlinszky ◽  
Gergely Padányi-Gulyás
Keyword(s):  
Water Quality ◽  
Suspended Sediment ◽  
Physical Limnology ◽  
Visualization System ◽  
Water Index ◽  
Spectral Signal ◽  
Suspended Sediment Concentrations ◽  
Custom Script ◽  
Fluorescence Line ◽  
High Concentrations

Easy to use satellite-based water quality visualizations are needed for monitoring and understanding coastal and inland waters, but to date, no publicly accessible real-time global visualization system was in place. Here we introduce the Ulyssys Water Quality Viewer (UWQV), a Sentinel Hub EO Browser Custom script designed for qualitative views of aquatic chlorophyll and suspended sediment concentrations. The viewer avoids unmixing of the chlorophyll and suspended sediment spectral signal by visualizing these parameters together, with high concentrations of suspended sediment obscuring chlorophyll if present. Cloud masking uses the Hollstein and Braaten algorithms (existing EO Browser custom script code), additionally water surfaces are masked using the Normalized Differential Water Index. Chlorophyll is estimated using reflectance line height-based indicators such as fluorescence line height and maximum chlorophyll index. Suspended sediment is visualized based on single-band reflectances at 620 or 700 nm. Data sources are Sentinel-2 and Sentinel-3 images, allowing either 20 m spatial resolution or up to daily imaging. This visualization system is easy to operate and interpret, and combined with the data service capacity of the Sentinel Hub, it is expected that UWQV will contribute to monitoring of remote water bodies and to our overall understanding of physical limnology and aquatic ecology.

Continuous and high-frequency measurements in limnology: history, applications, and future challenges

2016 ◽  
Vol 24 (1) ◽  
pp. 52-62 ◽  
Author(s):  
Pille Meinson ◽  
Agron Idrizaj ◽  
Peeter Nõges ◽  
Tiina Nõges ◽  
Alo Laas
Keyword(s):  
High Frequency ◽  
Meta Analysis ◽  
New Technology ◽  
Lake Metabolism ◽  
Physical Limnology ◽  
Frequency Measurements ◽  
Lake Ecology ◽  
Future Challenges ◽  
Regular Sampling ◽  
Using Data

Over the past 15 years, an increasing number of studies in limnology have been using data from high-frequency measurements (HFM). This new technology offers scientists a chance to investigate lakes at time scales that were not possible earlier and in places where regular sampling would be complicated or even dangerous. This has allowed capturing the effects of episodic or extreme events, such as typhoons on lakes. In the present paper we review the various fields of limnology, such as monitoring, studying highly dynamic processes, lake metabolism studies, and budget calculations, where HFM has been applied, and which have benefitted most from the application. Our meta-analysis showed that more than half of the high-frequency studies from lakes were made in North America and Europe. The main field of application has been lake ecology (monitoring, lake metabolism) followed by physical limnology. Water temperature and dissolved oxygen have been the most universal and commonly measured parameters and we review the various study purposes for which these measurements have been used. Although a considerable challenge for the future, our review highlights that broadening the spatial scale of HFM would substantially broaden the applicability of these data across a spectrum of different fields.

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