Publications
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Evolution and taxonomy of the Paleogene calcareous nannofossil genus Hornibrookina
The genus Hornibrookina consists of enigmatic calcareous nannofossils that first appeared shortly after the K-Pg mass extinction. Due to their relative paucity in most published sections, specimens of this genus have not been previously studied in detail and their paleobiogeographic preferences and evolutionary history have been poorly understood. Biostratigraphic and morphometric analyses of Horn
Authors
Jean Self-Trail, David K. Watkins, James J. Pospichal, Ellen Seefelt
Paleohydrological context for recent floods and droughts in the Fraser River Basin, British Columbia, Canada
The recent intensification of floods and droughts in the Fraser River Basin (FRB) of British Columbia has had profound cultural, ecological, and economic impacts that are expected to be exacerbated further by anthropogenic climate change. In part due to short instrumental runoff records, the long-term stationarity of hydroclimatic extremes in this major North American watershed remains poorly unde
Authors
Rebecca Lynn Brice, Bethany Coulthard, Inga Homfeld, Laura Dye, Kevin Anchukaitis
Estimating the pelagic ocean’s benefits to humanity can enhance ocean governance
The human footprint on the global ocean is ever-increasing, particularly with new ways to grow food in the ocean, new technologies in marine energy production as a way to resolve climate change, and transport and commerce expanding across the ocean. Yet, human activities in the ocean have long been managed using a sectoral approach (e.g., fisheries, biodiversity protection, energy production, ship
Authors
Lida Teneva, Aaron L. Strong, Vera Agostini, Kenneth J. Bagstad, Evangelina G Drakou, Zachary H. Ancona, Kristina Gjerde, Andrew C Hume, Nicholas Jickling
Beyond bulk: Density fractions explain heterogeneity in global soil carbon abundance and persistence
Understanding the controls on the amount and persistence of soil organic carbon (C) is essential for predicting its sensitivity to global change. The response may depend on whether C is unprotected, isolated within aggregates, or protected from decomposition by mineral associations. Here, we present a global synthesis of the relative influence of environmental factors on soil organic C partitionin
Authors
Katherine Heckman, Caitlin E. Hicks Pries, Corey Lawrence, Craig Rasmussen, Susan E. Crow, Alison M. Hoyt, Sophie F. von Fromm, Zheng Shi, Shane Stoner, Casey McGrath, Jeffery Beem-Miller, Asmeret Asefaw Berhe, Joseph C. Blankinship, Marco Keiluweit, Erika Marín-Spiotta, J. Grey Monroe, Alain F. Plante, Joshua Schimel, Carlos A. Sierra, Aaron Thompson, Rota Wagai
Social Values for Ecosystem Services (SolVES): Open-source spatial modeling of cultural services
Social Values for Ecosystem Services (SolVES) version 4.0 is a fully open-source, GIS-based tool designed to aid in the creation of quantitative, spatially explicit models of the nonmonetary values attributed to cultural ecosystem services, such as aesthetics and recreation, specifically to facilitate their incorporation into larger ecosystem service assessments. Newly redeveloped for QGIS, SolVES
Authors
Benson C. Sherrouse, Darius J. Semmens, Zachary H. Ancona
Retreat and regrowth of the Greenland Ice Sheet during the Last Interglacial as simulated by the CESM2-CISM2 coupled climate–ice sheet model
During the Last Interglacial, approximately 129 to 116 ka (thousand years ago), the Arctic summer climate was warmer than the present, and the Greenland Ice Sheet retreated to a smaller extent than its current state. Previous model-derived and geological reconstruction estimates of the sea-level contribution of the Greenland Ice Sheet during the Last Interglacial vary widely. Here, we conduct a tr
Authors
Aleah Sommers, Bette L. Otto-Bliesner, William Lipscomb, Marcus Lofverstrom, Sarah Shafer, Patrick J. Bartlein, Esther C. Brady, Erik Kluzek, Gunter Leguy, Katherine Thayer-Calder, Robert Tomas
Downhill from Austin and Ely to Las Vegas: U-Pb detrital zircon suites from the Eocene–Oligocene Titus Canyon Formation and associated strata, Death Valley, California
In a reconnaissance investigation aimed at interrogating the changing topography and paleogeography of the western United States prior to Basin and Range faulting, a preliminary study made use of U-Pb ages of detrital zircon suites from 16 samples from the Eocene–Oligocene Titus Canyon Formation, its overlying units, and correlatives near Death Valley. The Titus Canyon Formation unconformably over
Authors
Elizabeth L. Miller, Mark Raftrey, Jens-Erik Lundstern
Magmatism, migrating topography, and the transition from Sevier shortening to Basin and Range extension, western United States
The paleogeographic evolution of the western U.S. Great Basin from the Late Cretaceous to the Cenozoic is critical to understanding how the North American Cordillera at this latitude transitioned from Mesozoic shortening to Cenozoic extension. According to a widely applied model, Cenozoic extension was driven by collapse of elevated crust supported by crustal thicknesses that were potentially doub
Authors
Jens-Erik Lundstern, Elizabeth L. Miller
Evidence of glacial activity during MIS 4 in the Rocky Mountains, Colorado, USA
The Ziegler Reservoir fossil site near Snowmass Village, Colorado, provides a rare opportunity to examine environmental conditions in the Rocky Mountains during marine isotope stage (MIS) 4 (71–57 ka). Although recognized as a global-scale cold event, MIS 4 is typically absent from Rocky Mountain glacial chronologies because the geologic evidence was covered or destroyed during the subsequent, and
Authors
Jeffrey S. Honke, Jeffrey S. Pigati, J. Michael Daniels
Were humans and mammoths on the Channel Islands at the same time?
No abstract available.
Authors
Daniel R. Muhs
Growth of the wildland-urban interface within and around U.S. National Forests and Grasslands, 1990-2010
The wildland-urban interface (WUI), where housing is in close proximity to or intermingled with wildland vegetation, is widespread throughout the United States, but it is unclear how this type of housing development affects public lands. We used a national dataset to examine WUI distribution and growth (1990–2010) in proximity to National Forests and created a typology to characterize each Nationa
Authors
Miranda H. Mockrin, Dave Helmers, Sebastian Martinuzzi, Todd Hawbaker, Volker C. Radeloff
Concentration-discharge relationships of dissolved rhenium in Alpine catchments reveal its use as a tracer of oxidative weathering
Oxidative weathering of sedimentary rocks plays an important role in the global carbon cycle. Rhenium (Re) has been proposed as a tracer of rock organic carbon (OCpetro) oxidation. However, the sources of Re and its mobilization by hydrological processes remain poorly constrained. Here we examine dissolved Re as a function of water discharge, using samples collected from three alpine catchments th
Authors
Robert Hilton, Jens M. Turowski, Matthew Winnick, Mathieu Dellinger, Patrick Schleppi, Kenneth H. Williams, Corey Lawrence, Katharine Maher, Martin West, Amanda Hayton