Compound hot temperature and high chlorophyll extreme events in global lakes
An emerging concern for lake ecosystems is the occurrence of compound extreme events i.e. situations where multiple within-lake extremes occur simultaneously. Of particular concern are the co-occurrence of lake heatwaves (anomalously warm temperatures) and high chlorophyll-a extremes, two important...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2021-01-01
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| Series: | Environmental Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1748-9326/ac3d5a |
| _version_ | 1797747176213839872 |
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| author | R Iestyn Woolway Benjamin M Kraemer Jakob Zscheischler Clément Albergel |
| author_facet | R Iestyn Woolway Benjamin M Kraemer Jakob Zscheischler Clément Albergel |
| author_sort | R Iestyn Woolway |
| collection | DOAJ |
| description | An emerging concern for lake ecosystems is the occurrence of compound extreme events i.e. situations where multiple within-lake extremes occur simultaneously. Of particular concern are the co-occurrence of lake heatwaves (anomalously warm temperatures) and high chlorophyll-a extremes, two important variables that influence the functioning of aquatic ecosystems. Here, using satellite observations, we provide the first assessment of univariate and compound extreme events in lakes worldwide. Our analysis suggests that the intensity of lake heatwaves and high chlorophyll-a extremes differ across lakes and are influenced primarily by the annual range in surface water temperature and chlorophyll-a concentrations. The intensity of lake heatwaves is even greater in smaller lakes and in those that are shallow and experience cooler average temperatures. Our analysis also suggests that, in most of the studied lakes, compound extremes occur more often than would be assumed from the product of their independent probabilities. We anticipate compound extreme events to have more severe impacts on lake ecosystems than those previously reported due to the occurrence of univariate extremes. |
| first_indexed | 2024-03-12T15:47:23Z |
| format | Article |
| id | doaj.art-d862a0796bea461e9a84cfe07c1c021e |
| institution | Directory Open Access Journal |
| issn | 1748-9326 |
| language | English |
| last_indexed | 2024-03-12T15:47:23Z |
| publishDate | 2021-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Environmental Research Letters |
| spelling | doaj.art-d862a0796bea461e9a84cfe07c1c021e2023-08-09T15:22:42ZengIOP PublishingEnvironmental Research Letters1748-93262021-01-01161212406610.1088/1748-9326/ac3d5aCompound hot temperature and high chlorophyll extreme events in global lakesR Iestyn Woolway0Benjamin M Kraemer1Jakob Zscheischler2Clément Albergel3European Space Agency Climate Office, ECSAT, Harwell Campus , Didcot, Oxfordshire, United Kingdom; Department of Meteorology, University of Reading , Earley Gate, Reading, United Kingdom; School of Ocean Sciences, Bangor University , Menai Bridge, Anglesey, United KingdomEcosystem Research Department, IGB Leibniz Institute of Freshwater Ecology and Inland Fisheries , Berlin, GermanyDepartment of Computational Hydrosystems, Centre for Environmental Research—UFZ , Leipzig, Germany; Climate and Environmental Physics, University of Bern , Bern, Switzerland; Oeschger Centre for Climate Change Research, University of Bern , Bern, SwitzerlandEuropean Space Agency Climate Office, ECSAT, Harwell Campus , Didcot, Oxfordshire, United KingdomAn emerging concern for lake ecosystems is the occurrence of compound extreme events i.e. situations where multiple within-lake extremes occur simultaneously. Of particular concern are the co-occurrence of lake heatwaves (anomalously warm temperatures) and high chlorophyll-a extremes, two important variables that influence the functioning of aquatic ecosystems. Here, using satellite observations, we provide the first assessment of univariate and compound extreme events in lakes worldwide. Our analysis suggests that the intensity of lake heatwaves and high chlorophyll-a extremes differ across lakes and are influenced primarily by the annual range in surface water temperature and chlorophyll-a concentrations. The intensity of lake heatwaves is even greater in smaller lakes and in those that are shallow and experience cooler average temperatures. Our analysis also suggests that, in most of the studied lakes, compound extremes occur more often than would be assumed from the product of their independent probabilities. We anticipate compound extreme events to have more severe impacts on lake ecosystems than those previously reported due to the occurrence of univariate extremes.https://doi.org/10.1088/1748-9326/ac3d5alimnologyclimate changeextremes |
| spellingShingle | R Iestyn Woolway Benjamin M Kraemer Jakob Zscheischler Clément Albergel Compound hot temperature and high chlorophyll extreme events in global lakes Environmental Research Letters limnology climate change extremes |
| title | Compound hot temperature and high chlorophyll extreme events in global lakes |
| title_full | Compound hot temperature and high chlorophyll extreme events in global lakes |
| title_fullStr | Compound hot temperature and high chlorophyll extreme events in global lakes |
| title_full_unstemmed | Compound hot temperature and high chlorophyll extreme events in global lakes |
| title_short | Compound hot temperature and high chlorophyll extreme events in global lakes |
| title_sort | compound hot temperature and high chlorophyll extreme events in global lakes |
| topic | limnology climate change extremes |
| url | https://doi.org/10.1088/1748-9326/ac3d5a |
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