To investigate humans’ impact on freshwater resources, scientists have now conducted the first

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[ NASA Scientists Complete 1st Global Survey of Freshwater Fluctuation ]


Publisher: NASA
Date: 2021-03-03T08:53-05:00
Twitter: @11348282
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NASA scientists complete 1st global survey of freshwater fluctuation

To investigate humans’ impact on freshwater resources, scientists have now conducted the first global accounting of fluctuating water levels in Earth’s lakes and reservoirs – including ones previously too small to measure from space.

The research, published March 3 in the journal Nature, relied on NASA’s Ice, Cloud and land Elevation Satellite 2 (ICESat-2), launched in September 2018.

ICESat-2 sends 10,000 laser light pulses every second down to Earth. When reflected back to the satellite, those pulses deliver high-precision surface height measurements every 28 inches (70 centimeters) along the satellite’s orbit. With these trillions of data points, scientists can distinguish more features of Earth’s surface, like small lakes and ponds, and track them over time.

Publisher: EurekAlert!
Date: 2021-03-03 05:00:00 GMT/UTC
Twitter: @EurekAlert
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Global survey finds nature sanitizes millions of tons of human waste a year

Feb. 19 (UPI) — The majority of human waste is processed by wastewater treatment infrastructure, but according to a new global survey, the sanitization services of natural ecosystems still play a significant role in protecting water supplies.

When researchers in India and Britain analyzed sanitation services in 48 cities around the world, they found nature was responsible for cleaning 41.7 million tons of human waste annually — approximately 18 percent of the cities’ sanitization services. Advertisement

Researchers published the results of their survey, the first to take a global perspective on natural sanitation, in the journal One Earth on Friday.

Publisher: UPI
Date: 2021-02-19T11:17:26-05:00
Author: Brooks Hays
Twitter: @UPI
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Science Overview

The principal goal of NASA’s Juno mission is to understand the origin and evolution of Jupiter. Underneath its dense cloud cover, Jupiter safeguards secrets about the fundamental processes and conditions that governed our solar system during its formation. As our primary example of a giant planet, Jupiter can also provide critical knowledge for understanding the planetary systems being discovered around other stars.

With its suite of science instruments, Juno will investigate the existence of a possible solid planetary core, map Jupiter’s intense magnetic field, measure the amount of water and ammonia in the deep atmosphere, and observe the planet’s auroras.

Publisher: www.jpl.nasa.gov
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NASA: Iceberg A68, 3.5 times the size of London, has disintegrated

Once three-and-a-half times bigger than London, the’enormous A68 iceberg has now disintegrated into an ‘alphabet soup’ of individual fragments drifting in the ocean north of Antarctica, a NASA satellite photo revealed.’

The image, taken by the so-called’Moderate Resolution Imaging Spectroradiometer onboard’NASA’s ‘Terra’ Earth-observing satellite on February 12, shows that the giant berg has split into more than a dozen pieces.

Publisher: Mail Online
Date: 2021-02-18T13:23:51.000Z
Author: Ian Randall
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Effects of dry-wet cycles on nitrous oxide emissions in freshwater sediments: a synthesis

Climate change is expected to alter the frequency and intensity of extreme events. Climate change scenarios predict an increase in both prolonged drought periods and heavy rainfall events, intensifying seasonal runoff and flood risk even in areas where precipitation is expected to decline (Seneviratne et al., 2012). This will increase the magnitude and frequency of dry-wet cycles in aquatic ecosystems in the future. The global spatio-temporal expansion of lentic and lotic water bodies that fall periodically dry in response to climate change, land-use change and water abstraction, has raised further awareness to the effects of dry-wet cycles on biotic communities and biogeochemical processes in inland waters (Datry, Bonada & Boulton, 2017).

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Publisher: PeerJ
Date: 2021-02-12
Author: Renata Pinto
Twitter: @thePeerJ
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Atlantic Ocean circulation weakens, sparking climate worries

Because the equator receives a lot more direct sunlight than the colder poles, heat builds up in the tropics. In an effort to reach balance, the Earth sends this heat northward from the tropics and sends cold south from the poles. This is what causes the wind to blow and storms to form.

Through years of scientific research it has become clear that the Atlantic portion of the conveyor belt ‘ the AMOC ‘ is the engine that drives its operation. It moves water at 100 times the flow of the Amazon river. Here’s how it works.

A narrow band of warm, salty water in the tropics near Florida, called the Gulf Stream, is carried northward near the surface into the North Atlantic. When it reaches the Greenland region, it cools sufficiently enough to become more dense and heavier than the surrounding waters, at which point it sinks. That cold water is then carried southward in deep water currents.

Publisher: www.yahoo.com
Twitter: @Yahoo
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