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Sökning: WFRF:(Weyhenmeyer Gesa A.) > (2020-2022) > Magnuson John J.

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1.
  • Sharma, Sapna, et al. (författare)
  • Increased winter drownings in ice-covered regions with warmer winters
  • 2020
  • Ingår i: PLOS ONE. - : Public Library of Science. - 1932-6203. ; 15:11
  • Tidskriftsartikel (refereegranskat)abstract
    • Winter activities on ice are culturally important for many countries, yet they constitute a high safety risk depending upon the stability of the ice. Because consistently cold periods are required to form stable and thick ice, warmer winters could degrade ice conditions and increase the likelihood of falling through the ice. This study provides the first large-scale assessment of winter drowning from 10 Northern Hemisphere countries. We documented over 4000 winter drowning events. Winter drownings increased exponentially in regions with warmer winters when air temperatures neared 0 degrees C. The largest number of drownings occurred when winter air temperatures were between -5 degrees C and 0 degrees C, when ice is less stable, and also in regions where indigenous traditions and livelihood require extended time on ice. Rates of drowning were greatest late in the winter season when ice stability declines. Children and adults up to the age of 39 were at the highest risk of winter drownings. Beyond temperature, differences in cultures, regulations, and human behaviours can be important additional risk factors. Our findings indicate the potential for increased human mortality with warmer winter air temperatures. Incorporating drowning prevention plans would improve adaptation strategies to a changing climate.
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2.
  • Sharma, Sapna, et al. (författare)
  • Long-term ice phenology records spanning up to 578 years for 78 lakes around the Northern Hemisphere
  • 2022
  • Ingår i: Scientific Data. - : Springer Nature. - 2052-4463. ; 9:1
  • Tidskriftsartikel (refereegranskat)abstract
    • In recent decades, lakes have experienced unprecedented ice loss with widespread ramifications for winter ecological processes. The rapid loss of ice, resurgence of winter biology, and proliferation of remote sensing technologies, presents a unique opportunity to integrate disciplines to further understand the broad spatial and temporal patterns in ice loss and its consequences. Here, we summarize ice phenology records for 78 lakes in 12 countries across North America, Europe, and Asia to permit the inclusion and harmonization of in situ ice phenology observations in future interdisciplinary studies. These ice records represent some of the longest climate observations directly collected by people. We highlight the importance of applying the same definition of ice-on and ice-off within a lake across the time-series, regardless of how the ice is observed, to broaden our understanding of ice loss across vast spatial and temporal scales.
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