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Rates and timing of chlorophyll-a increases and related environmental variables in global temperate and cold-temperate lakes

Description: The files in this repository were created using code that is available in the associated GitHub repository (https://github.com/hfadams/pci) and in Zenodo (https://doi.org/10.5281/zenodo.6972355), which was used to standardize and compile a dataset of in situ chlorophyll-a data and related water quality data and for lakes at or above 40° N across the Northern hemisphere. Original data files are not included in this repository but can be found by following the links in the data sources tables in the SHARING/ACCESS INFORMATION section in the README.

The period of chlorophyll-a increase (PCI) dataset contains chlorophyll-a rate of increase along with mean water quality variables (i.e., surface water temperature, nutrients, and solar radiation (SSR)) during periods of rapid algal growth referred to as the PCI. PCI's were defined based on the normalized rate of change in the fluctuating chlorophyll-a concentration sampled over the year, and categorized as occurring in the spring, summer, or as a "single" PCI when there was one main period of growth. Additional lake parameters were included from the HydroLAKES and HydroATLAS databases, and trophic status index (TSI) was calculated from chlorophyll-a concentrations.

This dataset is intended to be used to explore trends between changing environmental conditions and lake productivity. However, as a compiled dataset, the PCI data is based on lake samples collected from a variety of organizations with differing methods. Great care was taken to standardize the data and provide all relevant metadata wherever possible
Authors: Adams, Hannah; Water Institute; University of Waterloo; https://orcid.org/0000-0003-2647-8021 ORCID iD
Keywords: chlorophyll a
lake productivity
eutrophication
growth rate
algae
Field of Research: 
Earth and related environmental sciences
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Other earth and related environmental sciences
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Other earth and related environmental sciences, not elsewhere classified
Date: 2021-10-14
Publisher: Federated Research Data Repository / dépôt fédéré de données de recherche
URI: https://doi.org/10.20383/102.0488
Related Identifiers: 
This dataset is cited by

This dataset is a supplement to

This dataset is supplemented by
Geographic Coverage: 
Place Name
Northern hemisphere
Geolocation Box: 
West Longitude
-119.2
East Longitude
140.4
North Latitude
62.8
South Latitude
31.2
Appears in Collections:Water Institute

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Access to this dataset is subject to the following terms:
Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/
Citation
Adams, H. (2021) Rates and timing of chlorophyll-a increases and related environmental variables in global temperate and cold-temperate lakes. Federated Research Data Repository. https://doi.org/10.20383/102.0488