Soil respiration is the result of heterotrophic respiration (Rh) and autotrophic respiration (Ra), accounting for about 50%–75% of the total ecosystem respiration on land, which is crucial for the global carbon cycle and ...
Ecology
Jul 4, 2024
0
0
Earth system models (ESMs) help us understand climate and environmental changes. With advances in computing power, ESMs can now be run at kilometer-scale (k-scale) resolutions, capturing very fine details to better predict ...
Earth Sciences
Jul 3, 2024
0
0
With record rainfall projected to continue into the future, many worry extreme flooding will follow suit. But a new CIRES-led study published today in Science of the Total Environment found an increase in precipitation alone ...
Earth Sciences
Jul 1, 2024
0
39
Researchers have unveiled a system capable of predicting the likelihood of heat wave occurrences in Korea ten days in advance. This technology is expected to facilitate early preparations for heat waves, particularly given ...
Environment
Jun 26, 2024
0
0
A multi-institutional study led by University of Illinois and Agroecosystem Sustainability Center (ASC) scientists concluded that, although soil moisture varies significantly both within a single field and from field to field ...
Agriculture
Jun 19, 2024
0
0
Known for its glowing swaths of yellow, orange and red, the U.S. Drought Monitor has warned farmers, residents and officials throughout the nation of impending water scarcity every week since 1999.
Earth Sciences
Jun 10, 2024
0
0
Global navigation satellite system reflectometry (GNSS-R) is emerging as a pivotal technology in remote sensing due to its ability to provide high-precision, real-time data under all weather conditions.
Earth Sciences
Jun 4, 2024
0
0
Imagine you're standing near the edge of the Antarctic Ice Sheet, gazing out over the ocean, when the ice near you starts to melt very rapidly. A surge of meltwater flows into the ocean. Surprisingly, you watch the sea level ...
Earth Sciences
May 24, 2024
0
154
Since April 2024, wide areas of south and southeast Asia, from Pakistan to the Philippines, have experienced prolonged extreme heat. Covering some of the most densely populated regions in the world, the series of heat waves ...
Environment
May 20, 2024
0
13
Every Thursday at 8:30 a.m. Eastern time, the U.S. Drought Monitor (USDM) publishes a map of drought conditions across the United States. Established in 2000, the USDM combines measurements of physical variables like soil ...
Earth Sciences
Apr 30, 2024
0
31
Water content or moisture content is the quantity of water contained in a material, such as soil (called soil moisture), rock, ceramics, or wood on a volumetric or gravimetric basis. The property is used in a wide range of scientific and technical areas, and is expressed as a ratio, which can range from 0 (completely dry) to the value of the materials' porosity at saturation.
Volumetric water content, θ, is defined mathematically as:
where Vw is the volume of water and VT = Vs + Vv = Vs + Vw + Va is the total volume (that is Soil Volume + Water Volume + Void Space). Water content may also be based on its mass or weight, thus the gravimetric water content is defined as:
where mw is the mass of water and mb (or ms for soil) is the bulk material mass. To convert gravimetric water content to volumetric water, multiply the gravimetric water content by the bulk specific gravity of the material.
This text uses material from Wikipedia, licensed under CC BY-SA
