6 results on '"Pierson, Don C."'
Search Results
2. Timing of spring events changes under modelled future climate scenarios in a mesotrophic lake.
- Author
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Mesman, Jorrit P., Jiménez-Navarro, Inmaculada C., Ayala, Ana I., Senent-Aparicio, Javier, Trolle, Dennis, and Pierson, Don C.
- Subjects
GLOBAL warming ,CLIMATE extremes ,CLIMATE change ,LAKES ,LAKE ecology ,BIOGEOCHEMISTRY - Abstract
Lakes experience shifts in the timing of physical and biogeochemical events as a result of climate warming, and relative changes in the timing of events may have important ecological consequences. Spring, in particular, is a period in which many key processes that regulate the ecology and biogeochemistry of lakes occur and also a time that may experience significant changes under the influence of global warming. In this study, we used a coupled catchment–lake model forced by future climate projections to evaluate changes in the timing of spring discharge, ice-off, the spring phytoplankton peak, and the onset of stratification in a temperate mesotrophic lake. Although the model explained only part of the variation in these events, the overall patterns were simulated with little bias. All four events showed a clear trend towards earlier occurrence under climate warming, with ice cover tending to disappear at the end of the century in the most extreme climate scenario. Moreover, relative shifts in the timing of these springtime events also occurred, with the onset of stratification tending to advance more slowly than the other events and the spring phytoplankton peak and ice-off advancing faster in the most extreme climate scenario. The outcomes of this study stress the impact of climate change on the phenology of events in lakes and especially the relative shifts in timing during spring. This can have profound effects on food web dynamics as well as other regulatory processes and influence the lake for the remainder of the growing season. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
3. Phenological shifts in lake stratification under climate change
- Author
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Woolway, R. Iestyn, Sharma, Sapna, Weyhenmeyer, Gesa A., Debolskiy, Andrey, Golub, Malgorzata, Mercado-Bettín, Daniel, Perroud, Marjorie, Stepanenko, Victor, Tan, Zeli, Grant, Luke, Ladwig, Robert, Mesman, Jorrit, Moore, Tadhg N., Shatwell, Tom, Vanderkelen, Inne, Austin, Jay A., DeGasperi, Curtis L., Dokulil, Martin, La Fuente, Sofia, Mackay, Eleanor B., Schladow, S. Geoffrey, Watanabe, Shohei, Marcé, Rafael, Pierson, Don C., Thiery, Wim, and Jennings, Eleanor
- Published
- 2021
- Full Text
- View/download PDF
4. Global data set of long-term summertime vertical temperature profiles in 153 lakes
- Author
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Pilla, Rachel M., Mette, Elizabeth M., Williamson, Craig E., Adamovich, Boris V., Adrian, Rita, Anneville, Orlane, Balseiro, Esteban, Ban, Syuhei, Chandra, Sudeep, Colom-Montero, William, Devlin, Shawn P., Dix, Margaret A., Dokulil, Martin T., Feldsine, Natalie A., Feuchtmayr, Heidrun, Fogarty, Natalie K., Gaiser, Evelyn E., Girdner, Scott F., González, María J., Hambright, K. David, Hamilton, David P., Havens, Karl, Hessen, Dag O., Hetzenauer, Harald, Higgins, Scott N., Huttula, Timo H., Huuskonen, Hannu, Isles, Peter D. F., Joehnk, Klaus D., Keller, Wendel Bill, Klug, Jen, Knoll, Lesley B., Korhonen, Johanna, Korovchinsky, Nikolai M., Köster, Oliver, Kraemer, Benjamin M., Leavitt, Peter R., Leoni, Barbara, Lepori, Fabio, Lepskaya, Ekaterina V., Lottig, Noah R., Luger, Martin S., Maberly, Stephen C., MacIntyre, Sally, McBride, Chris, McIntyre, Peter, Melles, Stephanie J., Modenutti, Beatriz, Müller-Navarra, Dörthe C., Pacholski, Laura, Paterson, Andrew M., Pierson, Don C., Pislegina, Helen V., Plisnier, Pierre-Denis, Richardson, David C., Rimmer, Alon, Rogora, Michela, Rogozin, Denis Y., Rusak, James A., Rusanovskaya, Olga O., Sadro, Steve, Salmaso, Nico, Saros, Jasmine E., Sarvala, Jouko, Saulnier-Talbot, Émilie, Schindler, Daniel E., Shimaraeva, Svetlana V., Silow, Eugene A., Sitoki, Lewis M., Sommaruga, Ruben, Straile, Dietmar, Strock, Kristin E., Swain, Hilary, Tallant, Jason M., Thiery, Wim, Timofeyev, Maxim A., Tolomeev, Alexander P., Tominaga, Koji, Vanni, Michael J., Verburg, Piet, Vinebrooke, Rolf D., Wanzenböck, Josef, Weathers, Kathleen, Weyhenmeyer, Gesa A., Zadereev, Egor S., and Zhukova, Tatyana V.
- Published
- 2021
- Full Text
- View/download PDF
5. Drivers of phytoplankton responses to summer wind events in a stratified lake: A modeling study
- Author
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Mesman, Jorrit P., Ayala, Ana I., Goyette, Stéphane, Kasparian, Jérôme, Marcé, Rafael, Markensten, Hampus, Stelzer, Julio A.A., Thayne, Michael W., Thomas, Mridul K., Pierson, Don C., and Ibelings, Bas W.
- Subjects
Storms ,Nutrient entrainment ,ddc:500.2 ,Oceanography, Hydrology, Water Resources ,Aquatic Science ,Oceanography ,Modelling ,Mixing ,Extreme winds ,ddc:550 ,Climate change ,ddc:333.7-333.9 ,Phytoplancton ,integumentary system ,fungi ,500 Naturwissenschaften und Mathematik::570 Biowissenschaften ,Biologie::570 Biowissenschaften ,Biologie ,Extreme events ,Miljövetenskap ,Phytoplankton ,Lake model ,Stratification ,extreme wind events ,Environmental Sciences ,lake phytoplankton ,internal nutrient loading - Abstract
Extreme wind events affect lake phytoplankton amongst others by deepening the mixed layer and increasing internal nutrient loading. Both increases and decreases of phytoplankton biomass after storms have been observed, but the precise mechanisms driving these responses remain poorly understood or quantified. In this study, we coupled a one-dimensional physical model to a biogeochemical model to investigate the factors regulating short-term phytoplankton responses to summer storms, now and under expected warmer future conditions. We simulated physical, chemical and biological dynamics in Lake Erken, Sweden, and found that wind storms could increase or decrease the phytoplankton concentration one week after the storm, depending on antecedent lake physical and chemical conditions. Storms had little effect on phytoplankton biomass if the mixed layer was deep prior to storm exposure. Higher incoming shortwave radiation and hypolimnetic nutrient concentration boosted growth, whereas higher surface water temperatures decreased phytoplankton concentration after storms. Medium-intensity wind speeds resulted in more phytoplankton biomass after storms than high-intensity wind. Simulations under a future climate scenario did not show marked differences in the way wind affects phytoplankton growth following storms. Our study shows that storm impacts on lake phytoplankton are complex and likely to vary as a function of local environmental conditions. Title in thesis list of papers:Drivers of phytoplankton responses to summer storms in a stratified lake: a modelling study
- Published
- 2022
6. Global increase in methane production under future warming of lake bottom waters
- Author
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Jansen, Joachim, Woolway, Richard Iestyn, Kraemer, Benjamin M., Albergel, Clément, Bastviken, David, Weyhenmeyer, Gesa A., Marcé, Rafael, Sharma, Sapna, Sobek, Sebastian, Tranvik, Lars J., Perroud, Marjorie, Golub, Malgorzata, Moore, Tadhg N., Råman Vinnå, Love, La Fuente, Sofia, Grant, Luke, Pierson, Don C., Thiery, Wim, Jennings, Eleanor, Hydrology and Hydraulic Engineering, and Faculty of Engineering
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Climate Research ,Climate Change ,Biodiversity & Conservation ,NORTHERN LAKES ,Environmental Sciences & Ecology ,SEDIMENT CHARACTERISTICS ,aquatic ,climate change ,greenhouse gases ,limnology ,methane ,temperature ,tropics ,Global Warming ,Klimatforskning ,Environmental Chemistry ,CH4 EMISSIONS ,General Environmental Science ,Global and Planetary Change ,Science & Technology ,CLIMATE-CHANGE ,CONSEQUENCES ,Ecology ,Atmosphere ,Temperature ,CONSUMPTION ,PROFILES ,EBULLITION ,Miljövetenskap ,Lakes ,ARCTIC LAKES ,TEMPERATURE-DEPENDENCE ,Biodiversity Conservation ,Life Sciences & Biomedicine ,Methane ,Environmental Sciences - Abstract
Lakes are significant emitters of methane to the atmosphere, and thus are important components of the global methane budget. Methane is typically produced in lake sediments, with the rate of methane production being strongly temperature dependent. Local and regional studies highlight the risk of increasing methane production under future climate change, but a global estimate is not currently available. Here, we project changes in global lake bottom temperatures and sediment methane production rates from 1901 to 2099. By the end of the 21st century, lake bottom temperatures are projected to increase globally, by an average of 0.86-2.60 degrees C under Representative Concentration Pathways (RCPs) 2.6-8.5, with greater warming projected at lower latitudes. This future warming of bottom waters will likely result in an increase in methane production rates of 13%-40% by the end of the century, with many low-latitude lakes experiencing an increase of up to 17 times the historical (1970-1999) global average under RCP 8.5. The projected increase in methane production will likely lead to higher emissions from lakes, although the exact magnitude of the emission increase requires more detailed regional studies. Funding Agencies|Deutsche Forschungsgemeinschaft [AD 91/22-1]; European Regional Development Fund [FEDER--MCIU-AEI/CGL2017-86788-C3-2-P]; FP7 Ideas: European Research Council [336642]; H2020 European Research Council [725546]; Knut och Alice Wallenbergs Stiftelse [KAW 2018-0191]; Natural Environment Research Council
- Published
- 2022
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