B
Bruce D. Johnson
Researcher at Dalhousie University
Publications - 67
Citations - 2643
Bruce D. Johnson is an academic researcher from Dalhousie University. The author has contributed to research in topics: Bubble & Seawater. The author has an hindex of 29, co-authored 67 publications receiving 2457 citations. Previous affiliations of Bruce D. Johnson include Halifax & University of North Dakota.
Papers
More filters
Journal ArticleDOI
Bubble growth and rise in soft sediments
Bernard P. Boudreau,Christopher K. Algar,Bruce D. Johnson,Ian W. Croudace,Allen H. Reed,Yoko Furukawa,Kelley M. Dorgan,Peter A. Jumars,Abraham S. Grader,Bruce S. Gardiner +9 more
TL;DR: The mechanics of uncemented soft sediments during bubble growth are not widely understood and no rheological model has found wide acceptance as discussed by the authors, but they offer definitive evidence on the mode of bubble formation in the form of X-ray computed tomographic images and comparison with theory.
Journal ArticleDOI
Evidence for the importance of bubbles in increasing air–sea gas flux
TL;DR: In this article, the authors report simultaneous in situ observations from a vertical array of dissolved-gas sensors and a variety of other instruments during a single storm event, and confirm the importance of bubbles for the gas-transfer process.
Journal ArticleDOI
Generation of stabilized microbubbles in seawater.
Bruce D. Johnson,Robert C. Cooke +1 more
TL;DR: Bubbles of less than 1 micrometer and as large as 13.5 micrometers in diameter, stabilized by an apparent compression of substances sorbed onto their surfaces, were examined to determine their physical and temporal stability.
Journal ArticleDOI
Burrowing mechanics: burrow extension by crack propagation.
TL;DR: It is shown that burrowers can progress through impeding, muddy, cohesive sediments by using a mechanically efficient, previously unsuspected mechanism — crack propagation — in which an alternating ‘anchor’ system of burrowing serves as a wedge to extend the crack-shaped burrow.
Journal ArticleDOI
Influence of bubbles on scattering of light in the ocean
TL;DR: The scattering and backscattering properties of bubble populations in the upper ocean are estimated with Mie theory and a generalized bubble size spectrum based on in situ observations and results are compared with the corresponding optical properties of micro-organisms of similar size.