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Feeding Methane Vents And Gas Hydrate Deposits At South Hydrate Ridge, Anne M. Trehu, Peter B. Flemings, Nathan L. B. Bangs, Johanna Chevallier, Eulalia Gracia, Joel E. Johnson, C.-S. Liu, Xiaoli Liu, Michael Riedel, Marta E. Torres
Feeding Methane Vents And Gas Hydrate Deposits At South Hydrate Ridge, Anne M. Trehu, Peter B. Flemings, Nathan L. B. Bangs, Johanna Chevallier, Eulalia Gracia, Joel E. Johnson, C.-S. Liu, Xiaoli Liu, Michael Riedel, Marta E. Torres
Faculty Publications
Log and core data document gas saturations as high as 90% in a coarse‐grained turbidite sequence beneath the gas hydrate stability zone (GHSZ) at south Hydrate Ridge, in the Cascadia accretionary complex. The geometry of this gas‐saturated bed is defined by a strong, negative‐polarity reflection in 3D seismic data. Because of the gas buoyancy, gas pressure equals or exceeds the overburden stress immediately beneath the GHSZ at the summit. We conclude that gas is focused into the coarse‐grained sequence from a large volume of the accretionary complex and is trapped until high gas pressure forces the gas to migrate through …
Carbon Balance And Vegetation Dynamics In An Old‐Growth Amazonian Forest, Amy H. Rice, Elizabeth Hammond Pyle, Scott R. Saleska, Lucy Hutyra, Michael W. Palace, Michael M. Keller, Plinio B. De Camargo, Kleber Portilho, Dulcyana F. Marques, Steven C. Wofsy
Carbon Balance And Vegetation Dynamics In An Old‐Growth Amazonian Forest, Amy H. Rice, Elizabeth Hammond Pyle, Scott R. Saleska, Lucy Hutyra, Michael W. Palace, Michael M. Keller, Plinio B. De Camargo, Kleber Portilho, Dulcyana F. Marques, Steven C. Wofsy
Faculty Publications
Amazon forests could be globally significant sinks or sources for atmospheric carbon dioxide, but carbon balance of these forests remains poorly quantified. We surveyed 19.75 ha along four 1‐km transects of well‐drained old‐growth upland forest in the Tapajós National Forest near Santarém, Pará, Brazil (2°51′ S, 54°58′ W) in order to assess carbon pool sizes, fluxes, and climatic controls on carbon balance. In 1999 there were, on average, 470 live trees per hectare with diameter at breast height (dbh) ≥10 cm. The mean (and 95% ci) aboveground live biomass was 143.7 ± 5.4 Mg C/ha, with an additional 48.0 ± …
Discharge Characteristics And Changes Over The Ob River Watershed In Siberia, Daqing Yang, Baisheng Ye, Alexander I. Shiklomanov
Discharge Characteristics And Changes Over The Ob River Watershed In Siberia, Daqing Yang, Baisheng Ye, Alexander I. Shiklomanov
Faculty Publications
This study analyzes long-term (1936–90) monthly streamflow records for the major subbasins within the Ob River watershed in order to examine discharge changes induced by human activities (particularly reservoirs and agricultural activities) and natural variations. Changes in streamflow pattern were found to be different between the upper and lower parts of the Ob watershed. Over the upper Ob basin, streamflow decreases in summer months and increases in the winter season. The decreases in summer are mainly due to water uses along the river valley for agricultural and industrial purposes and to reservoir regulation to reduce the summer peak floods. The …
Ox Yokes: Culture, Comfort And Animal Welfare, Andrew (Drew) B. Conroy
Ox Yokes: Culture, Comfort And Animal Welfare, Andrew (Drew) B. Conroy
Faculty Publications
Three yoking systems are used globally to capture the power of oxen. These are the head yoke, withers yoke, and neck yoke. Each system has its strengths and weaknesses, with culture and cattle playing a role in the adoption and use of each system. The neck yoke system offers important lessons in understanding animal comfort and yoke design. Despite its success, the neck yoke should not be universally adopted, nor should it be universally promoted. However ignoring the lessons learned in North America over the last 400 years would ignore animals and teamsters who perfected this system and learned to …