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)
12: Plant water movement in xylem and phloem: A new perspective, 16.08.2017
Transport Phenomena in the Biosphere
56 minutes 7 seconds
7 years ago
12: Plant water movement in xylem and phloem: A new perspective, 16.08.2017
12 |
0:00:00 Start
0:00:44 Why study plants?
0:02:09 Agricultural production
0:03:54 Plant vascular transport
0:05:58 Drought kills trees
0:06:56 Question: Why do plants need (so much) water?
0:08:02 Exchange of water for CO2
0:08:27 Cost of CO2 Diffusion and Fick's law
0:14:32 Transport Processes: Diffusion and advection
0:16:08 The Advection-Diffusion equation
0:19:10 Wood microstructure
0:21:25 Question: What pressures are needed to drive flow?
0:25:23 Pressure-drop/Flow rate
0:28:10 Transport Processes: The Navier-Stokes Equation
0:36:29 The Stokes equation Hagen-Poiseuille law
0:38:20 Analogy between electric and fluidic systems
0:39:53 Sugar transport
0:42:12 What powers sugar transport?
0:45:01 Taking the blood pressure of plants
0:51:07 The Münch mechanism Osmotic pressure pump
0:52:53 The leaf is an osmotic pump
0:54:57 Synthetic Phloem: Experiments by Münch (1927)
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)
