Global data set of long-term summertime vertical temperature profiles in 153 lakes

peer reviewedClimate change and other anthropogenic stressors have led to long-term changes in the thermal structure, including surface temperatures, deepwater temperatures, and vertical thermal gradients, in many lakes around the world. Though many studies highlight warming of surface water temperatures in lakes worldwide, less is known about long-term trends in full vertical thermal structure and deepwater temperatures, which have been changing less consistently in both direction and magnitude. Here, we present a globally-expansive data set of summertime in-situ vertical temperature profiles from 153 lakes, with one time series beginning as early as 1894. We also compiled lake geographic, morphometric, and water quality variables that can influence vertical thermal structure through a variety of potential mechanisms in these lakes. These long-term time series of vertical temperature profiles and corresponding lake characteristics serve as valuable data to help understand changes and drivers of lake thermal structure in a time of rapid global and ecological change. © 2021, The Author(s)

Rapid and highly variable warming of lake surface waters around the globe

peer reviewedIn this first worldwide synthesis of in situ and satellite-derived lake data, we find that lake summer surface water temperatures rose rapidly (global mean = 0.34°C decade-1) between 1985 and 2009. Our analyses show that surface water warming rates are dependent on combinations of climate and local characteristics, rather than just lake location, leading to the counterintuitive result that regional consistency in lake warming is the exception, rather than the rule. The most rapidly warming lakes are widely geographically distributed, and their warming is associated with interactions among different climatic factors - from seasonally ice-covered lakes in areas where temperature and solar radiation are increasing while cloud cover is diminishing (0.72°C decade-1) to ice-free lakes experiencing increases in air temperature and solar radiation (0.53°C decade-1). The pervasive and rapid warming observed here signals the urgent need to incorporate climate impacts into vulnerability assessments and adaptation efforts for lakes. © 2015. American Geophysical Union. All Rights Reserved

Rapid and highly variable warming of lake surface waters around the globe

Peer reviewed. ©2015. The Authors.This is an open access article under theterms of the Creative CommonsAttribution-NonCommercial-N oDerivsLicense, which permits use and distri-bution in any medium, provided theoriginal work is properly cited, the use isnon-commerc ial and no modificationsor adaptations are made.In this first worldwide synthesis of in situ and satellite-derived lake data, we find that lake summer surface water temperatures rose rapidly (global mean = 0.34°C decade 1) between 1985 and 2009. Our analyses show that surface water warming rates are dependent on combinations of climate and local characteristics, rather than just lake location, leading to the counterintuitive result that regional consistency in lake warming is the exception, rather than the rule. The most rapidly warming lakes are widely geographically distributed, and their warming is associated with interactions among different climatic factors —from seasonally ice-covered lakes in areas where temperature and solar radiation are increasing while cloud cover is diminishing (0.72°C decade 1) to ice-free lakes experiencing increases in air temperature and solar radiation (0.53°C decade 1). The pervasive and rapid warming observed here signals the urgent need to incorporate climate impacts into vulnerability assessments and adaptation efforts for lakes

eReefs - a new perspective on the Great Barrier Reef

The Great Barrier Reef (GBR) in Queensland of Australia is recognised globally for its beauty and biodiversity. Managing the GBR is a complex challenge. Its managers grapple with multiple threats to its future across spatial and temporal scales. In order to provide the step change that is needed to support regulatory, planning and management decisions, a project called eReefs has been proposed. eReefs is an integrated operational system of data sources, forecasting and hindcasting models and visualisation and reporting services, and will deliver a comprehensive suite of management tools using real-time or near-real-time information across the paddock-to-ocean scale for the GBR. eReefs will transform science and management of the GBR by dramatically improving the transparency, repeatability and application of information, and enable dynamic and auditable knowledge to be utilised by users and managers of the GBR. It will support managers, industries, farm businesses, and the community in monitoring the current status of the GBR environment at a whole of system scale. A small project, the eReefs Pilot, was undertaken to test the eReefs concept and to show the potential of eReefs to deliver a comprehensive suite of management tools for the GBR. The study aimed to demonstrate the potential of linking catchment, lagoon and oceanic models across the GBR environment. It made use of existing data from the Fitzroy WaterCAST catchment model and 3D (time based) polygonal contours from the Fitzroy estuary and whole of GBR (SHOC) hydrodynamic models for running, orchestrating and visualising various scenarios which reanalyzed historical data to explore what actually happened. This paper focuses on an initial step towards realising the full eReefs vision through the description of the following key deliverables of the project: (1) Development of the eReefs Google Earth Water Quality Visualisation Platform; (2) Orchestration of the Fitzroy Catchment, Estuary and the whole of GBR Lagoon models in a workflow environment; (3) Examination and visualisation of a number of catchment, estuary and lagoon scenarios; and (4) Reconstruction of two historical flood plume events in the Burdekin River and nearby coastal waters. The eReefs Pilot project has demonstrated the type of functionality that would be possible when the fully operational eReefs is built. It has become a valuable demonstration tool for engaging investors and stakeholders in the aims of eReefs in the longer term. It has also provided an early visualisation platform for immediate rollout where the data and models exist to support the development of the full eReefs vision. The study has highlighted an opportunity to transform our understanding, knowledge and prediction of the GBR environment and ecosystem through a comprehensive and coordinated investment in an operational information platform across spatial and temporal scales for the GBR. It has paved the way for a more robust and detailed development and realisation of the fully operational eReefs in the future