Video Experimental Relacionado
Updated: Nov 26, 2025
07:28
Evolution of Staircase Structures in Diffusive Convection
Published on: September 5, 2018
6.7K
El monzón indio descarrilado por un tren de olas del Atlántico Norte
P J Borah1,2, V Venugopal3,2,4, J Sukhatme1,2
1Centre for Atmospheric and Oceanic Sciences, Indian Institute of Science, Bangalore 560012, India.
Science (New York, N.Y.)
|December 11, 2020
Resumen
Las sequías del monzón indio a menudo se predicen por las cálidas condiciones del Pacífico. Sin embargo, casi la mitad de las sequías pasadas muestran temperaturas casi neutrales del Pacífico y disminuciones abruptas de lluvia a finales de la temporada, vinculadas a las olas de Rossby de latitud media.
Área de la Ciencia:
- La climatología
- Ciencias atmosféricas
- Meteorología
Sus antecedentes:
- El pronóstico de la sequía del monzón indio se basa tradicionalmente en los déficits de lluvia de toda la temporada vinculados a un Pacífico ecuatorial cálido.
- Sin embargo, este paradigma no explica una parte significativa de los eventos históricos de sequía.
Objetivo del estudio:
- Investigar las características y los mecanismos subyacentes de las sequías del monzón indio que se desvían del paradigma tradicional del Pacífico cálido.
- Identificar predictores alternativos para mejorar las previsiones de sequía.
Principales métodos:
- Análisis de los datos históricos de la sequía durante el siglo pasado.
- Identificación de los patrones de lluvia subestacionales y su correlación con la variabilidad del clima del Pacífico y el Atlántico.
- Investigación de las teleconexiones atmosféricas, específicamente la dinámica de las ondas de Rossby y las anomalías de vorticidad.
Principales resultados:
- Casi la mitad de las sequías monzónicas observadas en la India durante el siglo pasado ocurrieron con temperaturas casi neutrales del Pacífico.
- Estas sequías se caracterizaron por déficits subestacionales y abruptos de lluvia a finales de la temporada.
- Se identificó una teleconexión atmosférica significativa, que involucra a las ondas de Rossby originadas en latitudes medias, específicamente vinculadas a las anomalías de vórtice del Atlántico Norte.
Conclusiones:
- Las sequías del monzón indio pueden ser impulsadas por mecanismos independientes de las condiciones ecuatoriales del Pacífico.
- Los déficits de lluvia subestacionales asociados con las teleconexiones atmosféricas de latitudes medias representan un factor crítico, pero subestimado, que conduce a la sequía.
- Esta teleconexión atmosférica identificada ofrece una nueva vía para mejorar la previsibilidad de las sequías del monzón indio, especialmente cuando las señales del Pacífico están ausentes.
Videos de Conceptos Relacionados
01:12Precipitation Processes
2.9K
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...
2.9K
01:04Travelling Waves
6.4K
A wave is a disturbance that propagates from its source, repeating itself periodically, and is typically associated with simple harmonic motion. Mechanical waves are governed by Newton's laws and require a medium to travel. A medium is a substance in which a mechanical wave propagates, and the medium produces an elastic restoring force when it is deformed.
Water waves, sound waves, and seismic waves are some examples of mechanical waves. For water waves, the wave propagation medium is...
Water waves, sound waves, and seismic waves are some examples of mechanical waves. For water waves, the wave propagation medium is...
6.4K
02:41Responses to Drought and Flooding
11.5K
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.
11.5K
01:23Coriolis Force
5.3K
An accelerating particle experiences a force equal to the mass multiplied by the acceleration in an inertial frame of reference. Consider a particle in a non-inertial frame of reference, such as a sliding ball on a rotating table. The acceleration of the ball in this rotating reference frame is different than in the intertial frame, which modifies its equation of motion. The fictitious forces acting additionally on a rotating frame of reference alter Newton's Second Law expression.
5.3K
01:28Magnetostatic Boundary Conditions
1.4K
An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
1.4K
01:03Precipitation Gravimetry
10.8K
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...
10.8K