The term “biosphere” is the place on the Earth’s surface where life dwells. Since its inception in 1875, this concept launched one of the most ambitious interdisciplinary collaborative efforts in science as it forged partnerships between atmospheric sciences, biology, chemistry, climate, earth sciences, ecology, engineering, geology, geography, hydrology, mathematics, and physics.This course covers fundamentals and principles of air and water movement within the biosphere. It elaborates on key applications spanning subsurface water movement, the soil-plant system, xylem-phloem water movement, overland flow, the hyporheic zone and adjacent stream flow, and air flow in the lower atmosphere. The common theme weaving all the lectures is that fluid flow exerts significant controls on the form and function of the biosphere.
The talks were recorded during the MICMoR Summer School “Transport Phenomena and the Limits of Life in the Biosphere”, held at KIT/IMK-IFU, Garmisch-Partenkirchen, Germany, from 9th-18th August 2017. (picture: Gabriel Katul, Duke University)
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The term “biosphere” is the place on the Earth’s surface where life dwells. Since its inception in 1875, this concept launched one of the most ambitious interdisciplinary collaborative efforts in science as it forged partnerships between atmospheric sciences, biology, chemistry, climate, earth sciences, ecology, engineering, geology, geography, hydrology, mathematics, and physics.This course covers fundamentals and principles of air and water movement within the biosphere. It elaborates on key applications spanning subsurface water movement, the soil-plant system, xylem-phloem water movement, overland flow, the hyporheic zone and adjacent stream flow, and air flow in the lower atmosphere. The common theme weaving all the lectures is that fluid flow exerts significant controls on the form and function of the biosphere.
The talks were recorded during the MICMoR Summer School “Transport Phenomena and the Limits of Life in the Biosphere”, held at KIT/IMK-IFU, Garmisch-Partenkirchen, Germany, from 9th-18th August 2017. (picture: Gabriel Katul, Duke University)
10: An introduction to the soil-root-system, 14.08.2017
Transport Phenomena in the Biosphere
1 hour 20 minutes 44 seconds
7 years ago
10: An introduction to the soil-root-system, 14.08.2017
10 |
0:00:00 Start
0:00:27 An introduction to the soil-root-system
0:01:59 Bulk Soil Properties Defined
0:07:58 Representative Elementary Volume (REV) and the continuum hypothesis
0:11:20 State equation for soil water
0:13:12 Fluxes and flow of water
0:14:41 Text-book view-Analogy to other transport laws
0:21:50 Fluxes and flow of water
0:23:31 Fluxes and flow of water: The driving gradient
0:30:48 An 'ad-hoc' derivation of Darcy's law (for saturated conditions)
0:40:44 Darcy-Forchheimer law at Moderate Reynolds Number
0:43:29 Darcy's Law and the Hagen-Poiseuille equation
0:45:11 An 'ad-hoc' derivation of Darcy's law
0:50:21 Simplified mathematical representations
0:53:58 State Equation with roots
0:55:49 Dynamic Responses
0:56:35 Broader implications of case study for Soil moisture dynamics and climate
0:57:45 Background-Soil moisture dynamics and climate
0:58:54 Experimental results
1:00:43 Qualitative Analysis of Soil Moisture Response to Rainfall Fluctuations
1:01:17 Depth-Averaged continuity
1:04:08 Sample Time Series Measurements from Duke Forest, Durham, NC
1:05:22 Modeling Soil Moisture Dynamics: ET-s relation
1:07:02 Spectral Analysis of Soil Moisture
1:13:43 Implications to climate
1:14:17 Qualitative Analysis- Systems Approach
1:14:46 Root Water Uptake
1:16:49 Soil moisture simulations
1:19:49 Future Research Trends
Transport Phenomena in the Biosphere
The term “biosphere” is the place on the Earth’s surface where life dwells. Since its inception in 1875, this concept launched one of the most ambitious interdisciplinary collaborative efforts in science as it forged partnerships between atmospheric sciences, biology, chemistry, climate, earth sciences, ecology, engineering, geology, geography, hydrology, mathematics, and physics.This course covers fundamentals and principles of air and water movement within the biosphere. It elaborates on key applications spanning subsurface water movement, the soil-plant system, xylem-phloem water movement, overland flow, the hyporheic zone and adjacent stream flow, and air flow in the lower atmosphere. The common theme weaving all the lectures is that fluid flow exerts significant controls on the form and function of the biosphere.
The talks were recorded during the MICMoR Summer School “Transport Phenomena and the Limits of Life in the Biosphere”, held at KIT/IMK-IFU, Garmisch-Partenkirchen, Germany, from 9th-18th August 2017. (picture: Gabriel Katul, Duke University)
