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)
02: Introduction to the fluid mechanics and thermodynamics of cavitation in plants, 09.08.2017
Transport Phenomena in the Biosphere
1 hour 17 minutes 5 seconds
7 years ago
02: Introduction to the fluid mechanics and thermodynamics of cavitation in plants, 09.08.2017
02 |
0:00:00 Start
0:01:05 Structure of Talk
0:01:44 Very short history of land plant evolution
0:04:41 Rapid radiation of vascular plants
0:05:16 Xylem structure of vascular plants
0:07:45 Part 1 – Outline of the cohesion - tension theory
0:07:48 Anatomic features of the plant water transport system
0:08:19 Experimental evidence for sap flow
0:10:06 Outline of the cohesion – tension theory
0:15:44 Description of sap flow
0:21:14 Hazards to water transport
0:21:46 Experimental evidence for cavitation
0:22:19 Hazards to water transport – spontaneous cavitation
0:27:25 Hazards to water transport – air seeding
0:33:31 Safety measures against embolism
0:45:27 Condition for dissolution of mechanically stable bubbles
0:51:33 Xylem structure of vascular plants
0:53:53 Part2 – Restoration of conductivity and possible complications
0:53:56 Restoration of conductivity – basic idea of repair scenario
0:59:43 Bubble evolution after cavitation
1:02:10 Evolution of lumen bubble after cavitation
1:04:34 Evolution of pit bubble after caviation
1:07:07 Evolution of pit bubble near restoration of conductivity
1:09:22 Complications of the repair scenario
1:14:27 Summary
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)
