Feedback attribution to dry heatwaves over East Asia
| Autor: | Kyung-Ja Ha, Tae-Won Park, Ye-Won Seo |
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| Rok vydání: | 2022 |
| Předmět: |
010504 meteorology & atmospheric sciences
Renewable Energy Sustainability and the Environment Public Health Environmental and Occupational Health Context (language use) 010501 environmental sciences Albedo Sensible heat Atmospheric sciences 01 natural sciences Cloud feedback Atmosphere Latent heat Environmental science Water vapor 0105 earth and related environmental sciences General Environmental Science Positive feedback |
| Popis: | Summer heatwave events have exhibited increasing trends, with sudden increases occurring since the early 2000s over northeastern China and along the northern boundary of Mongolia. However, the mechanism behind heatwaves remains unexplored. To quantitatively examine the feedback attribution of concurrent events related to surface temperature anomalies, the coupled atmosphere–surface climate feedback-response analysis method based on the total energy balance within the atmosphere–surface column was applied. The results demonstrate that the contributions of the latent heat flux and surface dynamic processes served as positive feedback for surface warming by reducing the heat release from the surface to the atmosphere because of deficient soil moisture based on dry conditions. Cloud feedback also led to warm temperature anomalies through increasing solar insolation caused by decreasing cloud amounts associated with anomalous high-pressure systems. In contrast, the sensible heat flux played a role in reducing the warm temperature anomalies by the emission of heat from the surface. Atmospheric dynamic feedback led to cold anomalies. The influence of ozone, surface albedo, and water vapor processes is very weak. This study provides a better understanding of combined extreme climate events in the context of radiative and dynamic feedback processes. |
| Databáze: | OpenAIRE |
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