LéXPLORE: A floating laboratory on Lake Geneva offering unique lake research opportunities

Alfred Wüest,Natacha Pasche,Jean Guillard,Sébastien Lavanchy,Damien Bouffard,Marie‐Elodie Perga,Bastiaan W. Ibelings

doi:10.1002/wat2.1544

Abstract

AbstractEnvironmental sciences depend heavily on observational data. Successful studies of ecological processes in lakes require in‐situ data that cover the relevant temporal scales from milliseconds to entire seasons. Temporal and spatial coverage requirements represent a non‐trivial challenge in lake sciences, which have traditionally used sampling campaigns conducted from research vessels or anchored moorings. These come with various logistical tasks and impose constraints on data coverage. An open water platform can overcome many of these limitations by providing continuous access and a wide range of analytical capabilities in direct contact with the lake environment. A consortium of five partner institutions constructed a 10 × 10 m, open‐water, multipurpose platform on Lake Geneva (Switzerland/France) for a broad range of limnological research. The LéXPLORE platform, anchored since February 2019 at a position reaching 110 m depth off the lake's north‐shore, provides workspace for a large number of instruments and up to 16 staff working in parallel on individual or integrated multidisciplinary projects. The safe, dry and protected floating laboratory offers direct access to the lake environment for high‐sensitivity, high‐throughput analyses including those which might advance sensor technology. The platform provides flexible workspace for both high‐resolution measurements and investigations of larger‐scale external forcing. It thus supports multidisciplinary empirical research in limnology, atmospheric sciences, and remote sensing. This article describes the platform and how it will advance aquatic sciences. The large number of projects that have already requested access to the platform demonstrate the efficacy and necessity of the LéXPLORE concept.This article is categorized under: Water and Life > Conservation, Management, and Awareness Water and Life > Methods

Highlights

Aquatic systems processes occur over a wide range of time scales, from sub-seconds to decades
The LéXPLORE platform allows direct and continuous measurements of gas exchange using multiple techniques applied under varying environmental conditions
Given the inherently variable nature of aquatic systems, effective scientific investigations require long-term observations at high vertical and temporal resolution. To address these needs and overcome limitations imposed by traditional monitoring by boat, mooring, and automated buoys (Box 1), a consortium of five partner institutions constructed a multipurpose platform for performing a broad range of scientific observations on Lake Geneva

Summary

Introduction

Aquatic systems processes occur over a wide range of time scales, from sub-seconds to decades. The vision for LéXPLORE was to provide (a) space for instrumentation, (b) laboratory-like working conditions, (c) close and continuous proximity to the lake environment, (d) the possibility to perform in-situ experiments, and (e) a facility for developing and testing new sensor technology. An open water research platform requires safe surroundings to protect instruments from other lake activities, such as fishing, transportation, and recreation.

Results

Conclusion