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Lava Geochemistry As A Probe Into Crustal Formation At The East Pacific Rise, V. Dorsey Wanless
Lava Geochemistry As A Probe Into Crustal Formation At The East Pacific Rise, V. Dorsey Wanless
V. Dorsey Wanless
Basalt lavas comprise the greatest volume of volcanic rocks on Earth, and most of them erupt along the world's mid-ocean ridges (MORs). These MOR basalts (MORBs) are generally thought to be relatively homogeneous in composition over large segments of the global ridge system (e.g., Klein, 2005). However, detailed sampling of two different regions on the northern East Pacific Rise (EPR) and extensive analysis of the samples show that fine-scale mapping and sampling of the ridge axis can reveal significant variations in lava chemistry on both small spatial and short temporal scales. The two most intensely sampled sites within the EPR …
Inexpensive Time-Lapse Digital Cameras For Studying Transient Meteorological Phenomena: Dust Devils And Playa Flooding, Ralph D. Lorenz, Brian Jackson, Jason W. Barnes
Inexpensive Time-Lapse Digital Cameras For Studying Transient Meteorological Phenomena: Dust Devils And Playa Flooding, Ralph D. Lorenz, Brian Jackson, Jason W. Barnes
Brian Jackson
The authors describe the design and performance of inexpensive and compact time-lapse cameras suitable for field deployment in remote locations for long periods and their application to studying two time-variable meteorological phenomena in arid regions: desert dust devils and transient flooding of playa lakes. The camera units (with a total parts cost of ∼$80) are based around commercial “point and shoot” digital cameras, storing ∼1500 images on a solid-state memory card over a period between an hour to several months powered by alkaline batteries. A microcontroller can trigger image acquisition based on sensor inputs or at regular intervals. Some example …
Shoreline Features Of Titan’S Ontario Lacus From Cassini/Vims Observations, Jason W. Barnes, Robert H. Brown, Jason M. Soderblom, Laurence A. Soderblom, Ralf Jaumann, Brian Jackson, Christophe Sotin, Bonnie J. Buratti, Karly M. Pitman, Kevin H. Baines, Roger N. Clark, Phillip D. Nicholson, Elizabeth P. Turtle, Jason Perry
Shoreline Features Of Titan’S Ontario Lacus From Cassini/Vims Observations, Jason W. Barnes, Robert H. Brown, Jason M. Soderblom, Laurence A. Soderblom, Ralf Jaumann, Brian Jackson, Christophe Sotin, Bonnie J. Buratti, Karly M. Pitman, Kevin H. Baines, Roger N. Clark, Phillip D. Nicholson, Elizabeth P. Turtle, Jason Perry
Brian Jackson
We analyze observations of Titan's south polar lake Ontario Lacus obtained by Cassini's Visual and Infrared Mapping Spectrometer during the 38th flyby of Titan (T38; 2007 December 5). These near-closest-approach observations have the highest signal-to-noise, the finest spatial resolution, and the least atmospheric influence of any near-infrared lake observation to date. We use the large, spatially flat, and low-albedo interior of Ontario Lacus as a calibration target allowing us to derive an analytical atmospheric correction for emission angle. The dark lake interior is surrounded by two separate annuli that follow the lake interior's contours. The inner annulus is uniformly dark, …
1998 Hurricane Mitch Flood Flow: Its Relationship To Channel Morphology On The Riffle-Pool Reach Of Rio Plátano Biosphere Reserve, Northeastern Honduras: A Pristine Central American Rainforest Watershed, James P. Mcnamara, Spencer H. Wood, Dean M. Childs
1998 Hurricane Mitch Flood Flow: Its Relationship To Channel Morphology On The Riffle-Pool Reach Of Rio Plátano Biosphere Reserve, Northeastern Honduras: A Pristine Central American Rainforest Watershed, James P. Mcnamara, Spencer H. Wood, Dean M. Childs
Spencer H. Wood
PURPOSE OF STUDY To document the peak stages of flood flow of Hurricane Mitch in a tropical rain forest river, and their relation to channel morphology. These flood stages were the highest of the century on this river according to indigenous people living along the river bank.