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Forests make up most of the global land carbon sink and impact the surface energy budget. Forest degradation results in carbon emissions and causes biophysical warming (biogeochemical effects). Meanwhile, forest degradation can directly change the surface biophysical properties (for example, albedo, transpiration and roughness), thus affecting local energy balance and causing temperature chang...
Extreme wildfires not only destroy ecosystems and biodiversity, but also emit a large amount of harmful pollutants and greenhouse gases into the atmosphere, posing a threat to people's health and the global climate. Recently, an international research team spearheaded by Professor Zhang Qiang from the Department of Earth System Science (DESS) in Tsinghua University and Assistant Professor Zheng...
Leaf economic spectrum (LES) is a character dimension ubiquitous in nature, which embodies the balance strategy of plant leaves on environmental resources and presents many interesting phenomena urgently awaiting explanation. Recently, Wang Han's Research Group of Tsinghua University has proposed a new optimal strategy theory, which successfully can predict the core balance relationship of LES ...
With the rise of global temperature, extreme weather events have increased, leading to changes in water cycle characteristics (such as river runoff and seasonal peak), which can more easily trigger the occurrence of droughts and floods. The latest Coupled Model Intercomparison Project Phase 6 (CMIP6) proposes new shared pathways (SSPs) that incorporate socioeconomic development with more compre...
Against the backdrops of serious damage to global mangrove ecosystems and decrease of mangrove area year by year, resisting and reversing the loss of mangroves has become a focus of attention of governments and international organizations. The carbon sequestration of mangrove ecosystems per unit area significantly outshines that of nearby forest ecosystems and most inland wetlands, so the prote...
Sowing time directly affects crop yield, and how does climate change affect farmers' choice of sowing time? Recently, Associate Professor Wang Han’s Research Group of the Department of Earth System Science (DESS), Tsinghua University has, in the light of global observation data and model simulation, found that the global pattern of wheat sowing dates results from optimal yields. This finding, ...
Sowing time directly affects crop yield, and how does climate change affect farmers' choice of sowing time? Recently, Associate Professor Wang Han’s Research Group of the Department of Earth System Science (DESS), Tsinghua University has, in the light of global observation data and model simulation, found that the global pattern of wheat sowing dates results from optimal yields. This finding, ...
High-resolution ocean-sea ice models are core tools for climate change research and marine environmental security. With improvement of the resolution, the models can effectively analyze the refined process of ocean power and heat, and lower the uncertainty incurred by parameterization. The most advanced global ocean model in the world features a resolution of 1 ~ 2 kilometers, able to effective...
