Land–atmosphere interactions play a crucial role in shaping Earth's climate system, profoundly influencing weather patterns, climate variables, and ecological processes. Despite being located at similar latitudes, the Tibetan ...
Earth Sciences
Mar 6, 2024
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19
A new analysis of freshwater resources across the globe shows that the updated planetary boundary for freshwater change was surpassed by the mid-twentieth century. In other words, for the past century, humans have been pushing ...
Earth Sciences
Mar 4, 2024
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335
Central Asia has experienced a faster temperature rise than the global land over the past decades, which has brought unprecedented challenges to the survival and flourishing of life. The role of the drivers and their associated ...
Earth Sciences
Feb 29, 2024
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12
Climate change has resulted in increasingly extreme weather events worldwide. NIBIO research scientist Pål Thorvaldsen is among the many scientists who participated in a large international drought experiment initiated by ...
Ecology
Feb 20, 2024
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12
Ochroma pyramidale, commonly known as the balsa tree, is a large, fast-growing tree native to the Americas. The tree is known for its wide use in woodworking, due to its softness and its high strength compared to its low ...
Ecology
Feb 19, 2024
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18
Bacteriophages—viruses that infect bacteria—are common in soil ecosystems. However, many of these phages have not been identified, and the bacteria they target are also a mystery.
Ecology
Feb 13, 2024
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47
Soil moisture can determine how quickly a wildfire spreads, how fast a hill turns into a mudslide, and perhaps most importantly, how productive our food systems are. As temperatures rise due to human-caused climate change, ...
Earth Sciences
Feb 8, 2024
8
200
Soil moisture intricately influences climate and hydrological systems by modulating water and energy exchange processes. Accurate predictions of soil moisture are not only instrumental in drought monitoring but are crucial ...
Earth Sciences
Feb 8, 2024
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16
Plants both absorb carbon dioxide and release water vapor through their stomata, or pores on their leaves. In drought conditions, plants close these pores to conserve water, and this reduces their carbon dioxide uptake as ...
Earth Sciences
Feb 6, 2024
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7
A new study investigates the sinks and sources of key greenhouse gases of carbon dioxide, methane, and nitrous oxide in the Arctic landscape with a spatial resolution of only a few square meters. Vegetation and soil conditions ...
Earth Sciences
Feb 1, 2024
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15
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
