植物生产的最佳气候干预场景因国家而异
Brendan Clark1, Lili Xia2, Alan Robock2
1Department of Environmental Sciences, Rutgers University, New Brunswick, NJ, USA. bjc204@envsci.rutgers.edu.
Nature food
|October 5, 2023
概括
高层气溶干预 (SAI) 可以改变全球作物生产. 不同级别的SAI对热量生产的影响因地区而异,这对定义全球气候变化减缓最佳战略构成了挑战.
科学领域:
- 气候科学 气候科学
- 农业科学 农业科学
- 地球系统科学 地球系统科学
背景情况:
- 层层气溶干预 (SAI) 是一种拟议的地球工程技术,用于抵消人类造成的气候变化.
- 美国国家气象局部署可能会影响区域气候变量,包括温度,降水和太阳辐射.
研究的目的:
- 分析各种SAI情景对全球主食作物的产量的影响:玉米,大米,大豆和小麦.
- 调查不同的SAI实施水平如何影响不同地理区域的全国热量生产.
主要方法:
- 利用与作物模型集成的完全合的地球系统模型.
- 模拟了11个不同的层气溶干预场景,以评估气候和农业结果.
主要成果:
- 高度国家在持续的气候变化下显示高峰卡路里产量.
- 中国家通过适度的SAI实施来最大限度地提高作物产量.
- 在高水平的SAI下,赤道国家实现了最高的卡路里产量.
结论:
- 定义"全球最佳"的SAI策略是复杂的,即使在考虑像卡路里生产这样的单一指标时.
- SAI对农业的区域影响需要仔细考虑气候变化缓解努力中的地理差异.
相关概念视频
What is Climate?
18.6K
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.
18.6K
Adaptations that Reduce Water Loss
25.7K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
25.7K
Global Climate Change
24.4K
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.
24.4K
Responses to Heat and Cold Stress
13.6K
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.
13.6K
Responses to Drought and Flooding
10.7K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
10.7K
The Calvin Benson Cycle
4.6K
Ribulose 1,5- bisphosphate carboxylase/oxygenase (RuBisCo) is a critical enzyme that catalyzes carbon dioxide assimilation during photosynthesis. However, it is an inefficient enzyme, having an extremely slow catalytic rate. A typical enzyme can process about a thousand molecules per second; however, RuBisCo fixes only around three-carbon dioxides per second. Photosynthetic cells compensate for this slow rate by synthesizing very high amounts of RuBisCo, making it the most abundant single...
4.6K


