非辐射效应主导着局部地表温度对陆地覆盖变化的反应 - 从半经验模型的见解
Lorenz Hänchen1, Benjamin Quesada2, Almut Arneth3
1Department of Ecology, University of Innsbruck, Sternwartestrasse 15, Innsbruck, 6020, Austria.
Journal of environmental management
|March 14, 2025
概括
土地覆盖面的变化通过生物化学和生物物理效应影响气候. 生物物理效应,特别是非辐射变化,显著影响温度反应,必须纳入气候变化政策.
科学领域:
- 气候科学 气候科学
- 地球系统科学 地球系统科学
- 环境科学 环境科学
背景情况:
- 土地覆盖变化 (LCC) 通过生化 (碳排放) 和生物物理 (表面能量平衡) 影响显著推动气候变化.
- 对LCC生物物理效应的表面温度反应的大小和方向的量化仍然是一个挑战,也是正在进行的科学辩论的主题.
研究的目的:
- 开发和应用一种新的半经验模型,以区分和量化陆地覆盖变化对全球表面温度的直接影响.
- 在不同的场景下,评估LCC对温度的生物物理和生物化学影响的相对贡献.
主要方法:
- 开发一种新的半经验模型,将线性地表能量平衡用于生物物理效应和生物化学效应的经验模型相结合.
- 将模型应用于风格化的森林砍伐场景,历史的LCC数据和植树实验,同时排除间接影响.
主要成果:
- 风格化的森林砍伐场景导致全球平均直接变暖1.22K (生物物理) 和0.50K (生物化学).
- 历史上的LCC导致全球平均直接变暖0.42K (生物物理) 和0.15K (生物化学).
- 一个植树实验导致全球平均直接降温为-1.95 K (生物物理) 和 -0.96 K (生物化学).
结论:
- 低温电流的生物物理效应,特别是非辐射影响,对全球表面温度有着巨大的,往往被低估的影响.
- 准确评估和纳入LCC的生物物理和生物化学影响对于有效的气候变化缓解和适应战略至关重要.
相关概念视频
Radiation: Applications
1.1K
The average temperature of Earth is the subject of much current discussion. Earth is in radiative contact with both the Sun and dark space; it receives almost all its energy from the radiation of the Sun and reflects some of it into outer space. Dark space is very cold, about 3 K, so Earth radiates energy into it. For instance, heat transfer occurs from soil and grasses, the rate of which can be so rapid that frost can occur on clear summer evenings, even in warm latitudes.
The average...
The average...
1.1K
Global Climate Change
24.0K
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
24.0K
Absorption of Radiation
693
The rate of heat transfer by emitted radiation is described by the Stefan-Boltzmann law of radiation:
693
Mechanisms of Heat Transfer II
3.2K
In convection, thermal energy is carried by the large-scale flow of matter. Ocean currents and large-scale atmospheric circulation, which result from the buoyancy of warm air and water, transfer hot air from the tropics toward the poles and cold air from the poles toward the tropics. The Earth’s rotation interacts with those flows, causing the observed eastward flow of air in the temperate zones. Convection dominates heat transfer by air, and the amount of available space for the airflow...
3.2K
What is Climate?
18.1K
Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.
18.1K
Responses to Heat and Cold Stress
13.3K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
13.3K


