在西班牙半岛沿着1916-2020年期间干旱事件目录
Víctor Trullenque-Blanco1, Santiago Beguería2, Sergio M Vicente-Serrano3
1Estación Experimental de Aula Dei, Consejo Superior de Investigaciones Científicas (EEAD-CSIC), 50059, Zaragoza, Spain. vtrullenque@eead.csic.es.
Scientific data
|June 27, 2024
概括
研究人员使用标准化降水指数 (SPI) 从1916年到2020年在西班牙确定了40个主要干旱事件. 这项研究详细介绍了干旱动态,并提供了一个有价值的开放许可数据库,用于了解降水变化.
科学领域:
- 气候学 气候学 气候学
- 水文学的水文学
- 环境科学 环境科学
背景情况:
- 干旱对西班牙的社会经济部门构成重大风险,需要详细分析干旱的发生和行为.
- 了解干旱的时空动态对于有效的风险管理和减缓策略至关重要.
研究的目的:
- 为了识别和描述1916年至2020年期间西班牙大陆发生的主要干旱事件.
- 分析这些干旱事件的空间范围,持续时间,严重程度和传播模式.
- 创建一个干旱事件的开放许可数据库,用于进一步的研究和影响评估.
主要方法:
- 使用了MOPREDAS世纪格式的月度降水数据集 (1916-2020).
- 使用12个月标准降水指数 (SPI) 来识别干旱条件.
- 定义干旱事件为至少三个月的时期,SPI < -0.84,影响研究区域≥20%的干旱事件.
主要成果:
- 在西班牙大陆共发现了40个主要干旱事件.
- 对每个事件的空间范围,持续时间,严重程度和时空动态的详细信息进行了目录.
- 在干旱传播模式中观察到显著的异质性,表明不同的底层大气机制和地形影响.
结论:
- 该研究提供了西班牙主要干旱的全面目录,增强了我们对其特征的理解.
- 观察到的干旱动态的异质性凸显了气候和地理因素的复杂相互作用.
- 开放许可的数据库是研究干旱机制和对农业和社会的影响的宝贵资源.
相关概念视频
02:41Responses to Drought and Flooding
10.6K
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.
10.6K
01:17Precipitation and Co-precipitation
1.8K
Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...
1.8K
01:50Global 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
01:57Adaptations 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
01:12Precipitation Processes
442
The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
442
01:03Precipitation Gravimetry
6.0K
Precipitation gravimetry is based on converting an analyte into a sparingly soluble precipitate, which is separated by filtration and weighed. An ideal precipitate should be pure, insoluble, of known composition, and easily filtered from the reaction mixture.
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
In determining nickel by gravimetric analysis, a precipitant of ethanolic dimethylglyoxime is added to a hot nickel salt solution. This is quickly followed by the dropwise addition of dilute ammonia solution until precipitation occurs. A...
6.0K