Search Results - "HAFF, PETER K"

A probabilistic description of the bed load sediment flux: 1. Theory by Furbish, David Jon, Haff, Peter K., Roseberry, John C., Schmeeckle, Mark W.

“…We provide a probabilistic definition of the bed load sediment flux. In treating particle positions and motions as stochastic quantities, a flux form of the…”
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From divots to swales: Hillslope sediment transport across divers length scales by Furbish, David Jon, Haff, Peter K.

“…In soil‐mantled steeplands, soil motions associated with creep, ravel, rain splash, soil slips, tree throw, and rodent activity are patchy and intermittent and…”
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The proposed Anthropocene Epoch/Series is underpinned by an extensive array of mid‐20th century stratigraphic event signals by Head, Martin J., Zalasiewicz, Jan A., Waters, Colin N., Turner, Simon D., Williams, Mark, Barnosky, Anthony D., Steffen, Will, Wagreich, Michael, Haff, Peter K., Syvitski, Jaia, Leinfelder, Reinhold, Mccarthy, Francine M. G., Rose, Neil L., Wing, Scott L., An, Zhisheng, Cearreta, Alejandro, Cundy, Andrew B., Fairchild, Ian J., Han, Yongming, Ivar Do Sul, Juliana A., Jeandel, Catherine, Mcneill, J. R., Summerhayes, Colin P.

“…ABSTRACT The extensive array of mid‐20th century stratigraphic event signals associated with the ‘Great Acceleration’ enables precise and unambiguous…”
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The Anthropocene: a conspicuous stratigraphical signal of anthropogenic changes in production and consumption across the biosphere by Williams, Mark, Zalasiewicz, Jan, Waters, Colin N., Edgeworth, Matt, Bennett, Carys, Barnosky, Anthony D., Ellis, Erle C., Ellis, Michael A., Cearreta, Alejandro, Haff, Peter K., Ivar do Sul, Juliana A., Leinfelder, Reinhold, McNeill, John R., Odada, Eric, Oreskes, Naomi, Revkin, Andrew, Richter, Daniel deB, Steffen, Will, Summerhayes, Colin, Syvitski, James P., Vidas, Davor, Wagreich, Michael, Wing, Scott L., Wolfe, Alexander P., Zhisheng, An

“…Biospheric relationships between production and consumption of biomass have been resilient to changes in the Earth system over billions of years. This…”
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Regolith thickness instability and the formation of tors in arid environments by Strudley, Mark W., Murray, A. Brad, Haff, Peter K.

“…We present model results suggesting that a physical erosion–bedrock weathering feedback is responsible for the development of isolated bedrock knobs…”
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When did the Anthropocene begin? A mid-twentieth century boundary level is stratigraphically optimal by Zalasiewicz, Jan, Waters, Colin N., Williams, Mark, Barnosky, Anthony D., Cearreta, Alejandro, Crutzen, Paul, Ellis, Erle, Ellis, Michael A., Fairchild, Ian J., Grinevald, Jacques, Haff, Peter K., Hajdas, Irka, Leinfelder, Reinhold, McNeill, John, Odada, Eric O., Poirier, Clément, Richter, Daniel, Steffen, Will, Summerhayes, Colin, Syvitski, James P.M., Vidas, Davor, Wagreich, Michael, Wing, Scott L., Wolfe, Alexander P., An, Zhisheng, Oreskes, Naomi

“…We evaluate the boundary of the Anthropocene geological time interval as an epoch, since it is useful to have a consistent temporal definition for this…”
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Statistical description of slope-dependent soil transport and the diffusion-like coefficient by Furbish, David Jon, Haff, Peter K., Dietrich, William E., Heimsath, Arjun M.

“…For hillslopes undergoing “diffusive” soil transport, it is often assumed that the soil flux is proportional to the local land‐surface gradient, where the…”
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When Agendas Collide: Human Welfare and Biological Conservation by CHAN, KAI M.A, PRINGLE, ROBERT M, RANGANATHAN, JAI, BOGGS, CAROL L, CHAN, YVONNE L, EHRLICH, PAUL R, HAFF, PETER K, HELLER, NICOLE E, AL-KHAFAJI, KARIM, MACMYNOWSKI, DENA P

“…Conservation should benefit ecosystems, nonhuman organisms, and current and future human beings. Nevertheless, tension among these goals engenders potential…”
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Rain splash of soil grains as a stochastic advection-dispersion process, with implications for desert plant-soil interactions and land-surface evolution by Furbish, David Jon, Childs, Elise M., Haff, Peter K., Schmeeckle, Mark W.

“…We formulate soil grain transport by rain splash as a stochastic advection‐dispersion process. By taking into account the intermittency of grain motions…”
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Simulation of Eolian Saltation by Anderson, Robert S., Haff, Peter K.

“…Saltation is important in the transport of sand-sized granular material by wind and in the ejection of dust from the bed both on Earth and on Mars. The…”
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Mechanics of Wind Ripple Stratigraphy by Forrest, Spencer B., Haff, Peter K.

“…Stratigraphic patterns preserved under translating surface undulations or ripples in a depositional eolian environment are computed on a grain by grain basis…”
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Epochs, events and episodes: Marking the geological impact of humans by Waters, Colin N., Williams, Mark, Zalasiewicz, Jan, Turner, Simon D., Barnosky, Anthony D., Head, Martin J., Wing, Scott L., Wagreich, Michael, Steffen, Will, Summerhayes, Colin P., Cundy, Andrew B., Zinke, Jens, Fiałkiewicz-Kozieł, Barbara, Leinfelder, Reinhold, Haff, Peter K., McNeill, J.R., Rose, Neil L., Hajdas, Irka, McCarthy, Francine M.G., Cearreta, Alejandro, Gałuszka, Agnieszka, Syvitski, Jaia, Han, Yongming, An, Zhisheng, Fairchild, Ian J., Ivar do Sul, Juliana A., Jeandel, Catherine

“…Event stratigraphy is used to help characterise the Anthropocene as a chronostratigraphic concept, based on analogous deep-time events, for which we provide a…”
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Response to Merritts et al. (2023): The Anthropocene is complex. Defining it is not by Waters, Colin N., Head, Martin J., Zalasiewicz, Jan, McCarthy, Francine M.G., Wing, Scott L., Haff, Peter K., Williams, Mark, Barnosky, Anthony D., Fiałkiewicz-Kozieł, Barbara, Leinfelder, Reinhold, McNeill, J.R., Rose, Neil L., Steffen, Will, Summerhayes, Colin P., Wagreich, Michael, An, Zhisheng, Cearreta, Alejandro, Cundy, Andrew B., Fairchild, Ian J., Gałuszka, Agnieszka, Hajdas, Irka, Han, Yongming, Ivar do Sul, Juliana A., Jeandel, Catherine, Syvitski, Jaia, Turner, Simon D., Zinke, Jens

“…Merritts et al. (2023) misrepresent Paul Crutzen’s Anthropocene concept as encompassing all significant anthropogenic impacts, extending back many millennia…”
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The proposed Anthropocene Epoch/Series is underpinned by an extensive array of mid‐20 th century stratigraphic event signals by Head, Martin J., Zalasiewicz, Jan A., Waters, Colin N., Turner, Simon D., Williams, Mark, Barnosky, Anthony D., Steffen, Will, Wagreich, Michael, Haff, Peter K., Syvitski, Jaia, Leinfelder, Reinhold, Mccarthy, Francine M. G., Rose, Neil L., Wing, Scott L., An, Zhisheng, Cearreta, Alejandro, Cundy, Andrew B., Fairchild, Ian J., Han, Yongming, Ivar Do Sul, Juliana A., Jeandel, Catherine, Mcneill, J. R., Summerhayes, Colin P.

“…ABSTRACT The extensive array of mid‐20 th century stratigraphic event signals associated with the ‘Great Acceleration’ enables precise and unambiguous…”
Get full text

Statistical description of slope-dependent soil transport and the diffusion-like coefficient : Stochastic Transport and Emergent Scaling on Earth's Surface by JON FURBISH, David, HAFF, Peter K, DIETRICH, William E, HEIMSATH, Arjun M

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Rain splash of soil grains as a stochastic advection-dispersion process, with implications for desert plant-soil interactions and land-surface evolution : Stochastic Transport and Emergent Scaling on Earth's Surface by FURBISH, David Jon, CHILDS, Elise M, HAFF, Peter K, SCHMEECKLE, Mark W

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Scaling Rivers, blood and transportation networks by Haff, Peter K

“…The long-standing problem of explaining metabolic scaling in animals, whereby whole-animal metabolic rate B is observed to increase as a function of body mass…”
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Scaling Rivers, blood and transportation networks by Painter, Page R

“…The search for a theory to explain why the metabolic rate of mammals is proportional to the 3/4-power of body mass (Kleiber's law) has recently focused on the…”
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A two-stage mechanism for escape of Na and K from Io by Summers, M. E., Yung, Y. L., Haff, P. K.

“…A two-stage process is presented to identify Io as the source of Na and K ions in the Io plasma torus. The Voyager I IRIS experiment recorded an SO2 abundance…”
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Rivers, blood and transportation networks by Haff, P K

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