geologia: Lake

Evidence: 94 • authority: 72

A lake is often a naturally occurring, relatively large and fixed body of water on or near the Earth's surface. It is localized in a basin or interconnected basins surrounded by dry land. Lakes lie completely on land and are separate from the ocean, although they may be connected with the ocean by outflowing rivers. Lakes, like other bodies of water, are part of the water cycle, the processes by which water moves around the Earth. Most lakes are fresh water and account for almost all the world's surface freshwater, but some are salt lakes with salinities even higher than that of seawater. Lakes vary significantly in surface area and volume of water, but in total cover approximately 2.5 × 10…

Evidence: 74 • authority: 92

Large drainage systems produced half of Mars' ancient river sediment.. Large, continental-scale drainage systems occupy nearly half of Earth's land, shaping diverse ecosystems, with their activity primarily driven by climate and tectonism. Here, we investigate whether Mars, which lacks Earth's tectonism, has similarly large drainage systems that could have impacted the extent of habitable environments, sediment transport, and the formation of large sedimentary basins. We reconstruct large drainage systems using globally mapped ancient martian water-formed topography-valley networks, outlet canyons, and fluvial depositional systems-revealing large drainage systems (>10 5 km 2 ) similar in sc…

Evidence: 54 • authority: 72

The Great Lakes, also called the Great Lakes of North America, are a series of large interconnected freshwater lakes spanning the Canada–United States border. The five lakes are Superior, Michigan, Huron, Erie, and Ontario (though hydrologically, Michigan and Huron are a single body of water, joined at the Straits of Mackinac). The Great Lakes Waterway enables modern travel and shipping by water among the lakes. The lakes connect ultimately to the Atlantic Ocean via the Saint Lawrence River as their primary drainage outflow. The lakes are also connected to the Mississippi River basin through the Illinois Waterway. The Great Lakes are the largest group of freshwater lakes on Earth by total a…

Evidence: 54 • authority: 72

Most water in Earth's atmosphere and crust comes from saline seawater, while fresh water accounts for nearly 2.5% of the total . The vast bulk of the water on Earth is saline or salt water, with an average salinity of 35‰ (or 3.5%, roughly equivalent to 34 grams of salts in 1 kg of seawater), though this varies slightly according to the amount of runoff received from surrounding land. In all, water from oceans and marginal seas, saline groundwater and water from saline closed lakes amount to over 97% of the water on Earth, though no closed lake stores a globally significant amount of water. Saline groundwater is seldom considered except when evaluating water quality in arid regions. The rem…

Evidence: 53 • authority: 88

Abundance of impacted forest patches less than 5 km2 is a key driver of the incidence of malaria in Amazonian Brazil. Abstract The precise role that deforestation for agricultural settlements and commercial forest products plays in promoting or inhibiting malaria incidence in Amazonian Brazil is controversial. Using publically available databases, we analyzed temporal malaria incidence (2009–2015) in municipalities of nine Amazonian states in relation to ecologically defined variables: (i) deforestation (rate of forest clearing over time); (ii) degraded forest (degree of human disturbance and openness of forest canopy for logging) and (iii) impacted forest (sum of deforested and degraded fo…

Evidence: 47 • authority: 80

A dataset of outlines of glacial lakes with an area of no less than 0.05 km2 in the Koshi River basin from 1967 to 2014

Evidence: 47 • authority: 72

Earth is the third planet from the Sun and the only astronomical object known to harbor life. This is made possible by Earth being an ocean world, the only one in the Solar System sustaining liquid surface water. Almost all of Earth's water is contained in its ocean, which covers 70.8% of Earth's crust. The remaining 29.2% of Earth's crust is dry land, which is predominantly located within Earth's land hemisphere in the form of continental landmasses. Most of Earth's land is at least somewhat humid and covered by vegetation, while large ice sheets at Earth's polar deserts retain more water than Earth's groundwater, lakes, rivers, and atmospheric water combined. Earth's crust consists of slo…

Evidence: 41 • authority: 80

A life less ordinary: looking under the surface of Lake Vida