陆地-大气的反会导致全球雨水面包篮的作物作物失败
Hao Li1, Jessica Keune1, Femke Smessaert1
1Hydro-Climate Extremes Lab, Ghent University, Ghent, Belgium.
概括
农作物产量受到极端高温和干旱的严重影响. 这项研究表明,当地和上风的陆地-大气反都会使作物损失增加40%,特别是在水有限的地区.
科学领域:
- 农业科学 农业科学
- 气候科学 气候科学
- 大气科学 大气科学
背景情况:
- 全球作物产量对气候变化很敏感,极端干旱和炎热的年份会导致重大农业失败.
- 当地的土地-大气反,包括土壤水分,蒸发和温度,显著影响作物生产率.
- 逆风地区在极端气候条件下对作物产量的影响仍未得到充分研究.
研究的目的:
- 调查影响主要雨水农业地区 (面包篮) 的湿度和热量的时空起源.
- 量化作物产量对上风区域和当地陆地-大气相互作用的依赖性.
- 解开地方和上风反对低产年农业生产率的综合影响.
主要方法:
- 对75个全球雨水面包篮的水分和热传输来源的分析.
- 评估当地和上风地区的陆地-大气相互作用.
- 对异常湿度和热传输对作物产量赤字的影响量化.
主要成果:
- 当上风和当地的陆地大气反都导致低湿度和高热量时,作物失败的风险增加约40%.
- 上风的陆地-大气反对水有限的农业地区的生产力赤字的影响更为明显.
- 这些地区更依赖于来自上风陆地地区的水分供应.
结论:
- 了解农业上风下风依赖关系对于评估气候变化对粮食安全的影响至关重要.
- 识别水源区域及其大气连接可以为适应策略提供信息.
- 缓解粮食短缺需要考虑区域范围内的陆地-大气系统的相互联系.
更多相关视频
13:27Exploring the Effects of Atmospheric Forcings on Evaporation: Experimental Integration of the Atmospheric Boundary Layer and Shallow Subsurface
Published on: June 8, 2015
8.7K
06:35Semi-High Throughput Screening for Potential Drought-tolerance in Lettuce Lactuca sativa Germplasm Collections
Published on: April 17, 2015
9.0K
相关概念视频
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
What is Climate?
18.4K
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.
18.4K
Adaptations that Reduce Water Loss
25.5K
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.
25.5K
Threats to Biodiversity
22.3K
There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...
22.3K
Global Climate Change
24.3K
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.
24.3K
The Soil Ecosystem
19.8K
Plants obtain inorganic minerals and water from the soil, which acts as a natural medium for land plants. The composition and quality of soil depend not only on the chemical constituents but also on the presence of living organisms. In general, soils contain three major components:
19.8K
