Video Experimental Relacionado

Updated: Jul 30, 2025

Author Spotlight: Advancing Coral Culture - Creating a Semi-Quantitatively Controlled Microenvironment System to Counter Current Limitations

Author Spotlight: Advancing Coral Culture - Creating a Semi-Quantitatively Controlled Microenvironment System to Counter Current Limitations

Published on: July 21, 2023

Los satélites revelan una disminución generalizada en el almacenamiento mundial de agua de los lagos

Fangfang Yao¹, Ben Livneh^1,2, Balaji Rajagopalan^1,2

¹Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado Boulder, Boulder, CO 80309, USA.

Science (New York, N.Y.)

|May 18, 2023

Resumen

Los lagos globales se están reduciendo debido al cambio climático y al uso humano. Más de la mitad de los lagos más grandes muestran una pérdida significativa de volumen, lo que afecta a los recursos hídricos de miles de millones de personas en todo el mundo.

Área de la Ciencia:

Ciencias del medio ambiente
Hidrología
Ciencias del clima

Sus antecedentes:

Los lagos son recursos críticos de agua dulce, que contienen el 87% del agua dulce líquida de la superficie de la Tierra.
Las tendencias globales y los factores que impulsan el cambio de volumen de los lagos no se comprenden bien.
El cambio climático y las actividades humanas representan amenazas significativas para los ecosistemas de los lagos.

Objetivo del estudio:

Para analizar los cambios globales en el volumen de los lagos durante tres décadas.
Identificar las causas principales de la disminución del almacenamiento en los lagos.
Evaluar las implicaciones para la gestión mundial de los recursos hídricos.

Principales métodos:

Análisis de las observaciones por satélite de los lagos más grandes de 1972 (1992-2020).
Integración de datos climáticos y modelos hidrológicos.
Cuantificación de los cambios de almacenamiento en lagos y embalses naturales.

Principales resultados:

El 53% de los lagos analizados mostraron disminuciones de almacenamiento estadísticamente significativas (1992-2020).
El calentamiento climático, el aumento de la evaporación y el consumo de agua impulsan la pérdida de lagos naturales.
La sedimentación es la principal causa de pérdida de almacenamiento en los embalses.
Se estima que el 25% de la población mundial vive en cuencas de lagos que se están secando.

Conclusiones:

La disminución del volumen de los lagos es un problema generalizado en todo el mundo.
El cambio climático y el uso humano del agua son factores críticos de la escasez de agua dulce.
La gestión sostenible del agua debe tener en cuenta los impactos del clima y la sedimentación.

Más Videos Relacionados

In Situ Soil Moisture Sensors in Undisturbed Soils

In Situ Soil Moisture Sensors in Undisturbed Soils

Published on: November 18, 2022

Continuous Hydrologic and Water Quality Monitoring of Vernal Ponds

Continuous Hydrologic and Water Quality Monitoring of Vernal Ponds

Published on: November 13, 2017

Videos de Conceptos Relacionados

The Water Cycle

The Water Cycle

The Earth’s hydrosphere includes all of the areas where the storage and movement of water occurs. Since water is the basis of all living processes, the cycling of water is extremely important to ecosystem dynamics.

Global Climate Change

Global Climate Change

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.

Responses to Drought and Flooding

Responses to Drought and Flooding

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.

Precipitation Gravimetry

Precipitation Gravimetry

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...

Adaptations that Reduce Water Loss

Adaptations that Reduce Water Loss

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.

Quality of Water

Quality of Water

In concrete preparation, the quality of water is paramount as it affects the strength and durability of the concrete. Potable water is usually preferred; however, it must not have excessive sodium or potassium to prevent compromising the concrete's integrity. Water quality is typically evaluated based on impurities such as dissolved solids, chlorides, and sulfates, and its pH value is ideally between 6 and 8. Even slightly acidic natural water may be acceptable unless it contains harmful...