74 Works

Data from: Effects of Bark Beetle Outbreaks on Forest Landscape Pattern in the Southern Rocky Mountains, U.S.A.

Kyle Rodman, Robert Andrus, Cori Butkiewicz, Teresa Chapman, Nathan Gill, Brian Harvey, Dominik Kulakowski, Niko Tutland, Thomas Veblen & Sarah Hart
Since the late 1990s, extensive outbreaks of native bark beetles (Curculionidae: Scolytinae) have affected coniferous forests throughout Europe and North America, driving changes in carbon storage, wildlife habitat, nutrient cycling, and water resource provisioning. Remote sensing is a crucial tool for quantifying the effects of these disturbances across broad landscapes. In particular, Landsat time series (LTS) are increasingly used to characterize outbreak dynamics, including the presence and severity of bark beetle-caused tree mortality, though broad-scale...

The cost of travel: how dispersal ability limits local adaptation in host-parasite interactions

Pieter Johnson, Dana Calhoun, Wynne Moss, Travis McDevitt-Galles, Tawni Riepe, Joshua Hallas, Thomas Parchman, Chris Feldman, Josh Cropanzano, Jay Bowerman, Tyler Achatz, Vasyl Tkach & Janet Koprivnikar
Classical theory suggests that parasites will exhibit higher fitness in sympatric relative to allopatric host populations (local adaptation). However, evidence for local adaptation in natural host-parasite systems is often equivocal, emphasizing the need for cross-infection experiments conducted over realistic geographic scales and comparisons among species with varied life history traits. Here, we conducted cross-infection experiments to test how two trematode (flatworm) species (Paralechriorchis syntomentera and Ribeiroia ondatrae) with differing dispersal abilities varied in the strength...

Modulation of a protein-folding landscape revealed by AFM-based force spectroscopy notwithstanding instrumental limitations

Devin Edwards, Marc-Andre Leblanc & Thomas Perkins
Single-molecule force spectroscopy is a powerful tool for studying protein folding. Over the last decade, a key question has emerged: how are changes in intrinsic biomolecular dynamics altered by attachment to micron-scale force probes via flexible linkers? Here, we studied the folding/unfolding of α3D using AFM-based force spectroscopy. α3D offers an unusual opportunity as a prior smFRET study showed α3D’s molecular diffusion constant within the context of Kramers theory varies with pH. The resulting pH-dependence...

Underrepresented youth experience barriers prior to field experiences

Susan Bonfield, Dalia Dorta & Jorge Vargas-Barriga
Environment for the Americas has developed a model internship program that helps to recruit diverse youth for internship positions on federal lands and with non-governmental organizations. To improve the program, we have conducted almost a decade of surveys to examine the barriers diverse youth may face when applying for these positions and working at sites where staff, visitors, and other interns may be predominantly White. Our model has been very successful in addressing barriers, including...

Conference on World Affairs Audio Archive

These digitized audio recordings present some of the memorable speakers and sessions from the early years of the Conference on World Affairs (1959-1994), including R. Buckminster Fuller, Henry Kissinger, Yitzhak Rabin, Marya Mannes, Huey P. Newton, Margot Adler, Ralph Nader, and I. F. Stone. Year by year, CWA recordings encapsulate the historic tenor of the times, as participants explore topics as diverse as civil rights, Castro, black power, the War on Poverty, student revolutions of...

Data for \"Disturbance and valley confinement: controls on floodplain LW and organic matter jam deposition in the Colorado Front Range, USA\"

Molly Guiney
Organic matter dynamics (entrainment, transport, deposition) can influence ecogeomorphic complexity in rivers. However, the depositional controls on downed, large wood (LW) and coarse particulate organic matter (CPOM) on floodplains have rarely been assessed. We investigate the influence of different disturbance histories, as well as geomorphology and forest stand density, on the deposition of LW and CPOM accumulations, or jams, between two adjacent drainages (West Creek, North Fork Big Thompson) in the Colorado Front Range. Both...

Data Set for \"Impact of Hydrogen Sulfide on Photochemical Haze Formation in Methane/Nitrogen Atmospheres\"

Nathan W Reed, Browne, Eleanor Carol & Margaret A Tolbert
Data set for the published article "Impact of Hydrogen Sulfide on Photochemical Haze Formation in Methane/Nitrogen Atmospheres" by Nathan W Reed, Eleanor C Browne, and Margaret A Tolbert. Published in ACS Earth and Space Chemistry. Data for aerosol mass spectra, particle mobility diameter, and vacuum aerodynamic diameter discussed and presented in the publication.

PSP FIELDS Digital Fields Board (DFB) AC-coupled Differential Voltage, V3-V4 Antennae, Dipole Mode, Bandpass filtered, High Gain, Sensor coordinates, Level 2 (L2), 0.873813 s Data

Stuart D. Bale, David M. Malaspina, Alexandros Chasapis, Marc Pulupa, Timothy Quinn & Peter Schroeder
PSP FIELDS Digital Fields Board, DFB, dV34 data. The DFB is the low frequency, less than 75 kHz, component of the FIELDS experiment on the Parker Solar Probe spacecraft. DFB AC bandpass data consist of peak and average values of the absolute value of bandpassed time series waveform data over a time interval equal to the reporting cadence. The AC bandpass data have the peak response frequency of each bin reported in the metadata. The...

Fire emissions data before and after peatland restoration, Indonesia, 2004-2015

L. Kiely, D.V. Spracklen & C. Wiedinmyer
This dataset contains fire emissions from Equatorial Asia for the years 2004, 2006, 2009, 2012, 2014 and 2015. The data is based on the Fire Inventory from National Center for Atmospheric Research with the addition of emissions from Indonesian peat fires, which contribute substantially to fire emissions in the region. The files for each year contain daily information on the area burned and emissions of several species, including CO, CO2 and PM2.5. Data is given...

SORCE-SIM TSIS1-SIM Irradiance Calibration Ratio (STICR) V2.0

Steven Penton
TSIS1-SIM Recalibration of the SORCE-SIM Absolute Irradiance Scale: V02 This is version 2.0 (V02.0) of the SORCE-SIM to TSIS-SIM Irradiance Calibration Ratio (STICR). This data product uses the temporal overlap of the Solar Radiation and Climate Experiment (SORCE) and the Total and Spectral Solar Irradiance Sensor (TSIS-1) Spectral Irradiance Monitor (SIM) instruments to create an alternate SORCE-SIM irradiance calibration. The STICR is the mean TSIS-SIM/SORCE-SIM irradiance ratio during the temporal overlap between the two missions...

Assessing the impact of diffusion model on the turbulent transport and flame structure of premixed lean hydrogen flames: hydrogen data

Aaron Fillo, PETER HAMLINGTON & Kyle Niemeyer
This dataset contains results from direct numerical simulations of premixed, three-dimensional, turbulent hydrogen/air flames, using the multicomponent and mixture-averaged diffusion models. In particular, this dataset contains information about the enstrophy budget and flame structure. We performed the simulations using the finite-difference code NGA; simulation details are described completely in the associated article.


Adam L. Mahood, Jennifer K. Balch, Joe McGlinchy, Estelle J. Lindrooth, Lise A. St. Denis, Maxwell C. Cook, Travis Williams & Nathan P. Mietkiewicz
This is event- and daily-level polygons for the Fire event delineation (FIRED) product for Uruguay from November 2001 to May 2021. It is derived from the MODIS MCD64A1 burned area product (see https://lpdaac.usgs.gov/products/mcd64a1v006/ for more details). The MCD64A1 is a monthly raster grid of estimated burned dates. Firedpy (www.github.com/earthlab/firedpy) is an algorithm that converts these rasters into events by stacking the entire time series into a spatial-temporal data cube, then uses an algorithm to assign...

Blanca Condo Cluster

The University of Colorado Boulder Research Computing condo computing service "Blanca" offers researchers the opportunity to purchase and own compute nodes that will be operated as part of a shared cluster. The aggregate cluster is made available to all condo partners while maintaining priority for the owner of each node.

ISIMIP3a reservoirs & dams input data

María del Rocío Rivas López, Jida Wang & Fangfang Yao
The Inter-Sectoral Impact Model Intercomparison Project (ISIMIP) provides a framework for the collation of a consistent set of climate impact data across sectors and scales. It also provides a unique opportunity for considering interactions between climate change impacts across sectors through consistent scenarios.
The ISIMIP3a part of the third simulation round is dedicated to i) impact model evaluation and improvement and ii) detection and attribution of observed impacts according to the framework of IPCC AR5 Working...

University of Colorado Institute of Arctic and Alpine Research (INSTAAR) Flask-Air Sample Measurements of Atmospheric Non Methane Hydrocarbons Mole Fractions from the NOAA GML Carbon Cycle Surface Network at Global and Regional Background Sites, 2004-2016

Detlev Helmig, Jacques Hueber, Pieter Tans, &
The CCGG cooperative air sampling network effort began in 1967 at Niwot Ridge, Colorado. Today, the network is an international effort which includes regular discrete samples from the NOAA GML baseline observatories, cooperative fixed sites, and commercial ships. Air samples are collected approximately weekly from a globally distributed network of sites. Samples are analyzed for Carbon Dioxide (CO2), Methane (CH4), Carbon Monoxide (CO), Hydrogen Gas (H2), Nitrous Oxide (N2O), and Sulfur Hexafluoride (SF6); and by...

Positive interactions between an exotic invader and moss biocrusts vary across life-stage and correspond with the effect of water pulses on soil nitrogen

Mandy Slate, Morgan McLeod & Ragan Callaway
The size and frequency of resource pulses can affect plant interactions and increase the abundance of invasive species relative to native species. We examined resource pulses generated during desiccation and rehydration of communities of native biological soil crust (biocrust) forming mosses, in the context of positive associations between biocrusts and the invasive forb, Centaurea stoebe. We surveyed Centaurea and biocrust cover and evaluated how interactions among Centaurea, biocrusts, and water pulses influenced plant biomass and...

Biodiversity-productivity relationships are key to nature-based climate solutions

Akira Mori, Laura Dee, Andrew Gonzalez, Haruka Ohashi, Jane Cowles, Alexandra Wright, Michel Loreau, Yann Hautier, Tim Newbold, Peter Reich, Tetsuya Matsui, Wataru Takeuchi, Kei-Ichi Okada, Rupert Seidl & Forest Isbell
The global impacts of biodiversity loss and climate change are interlinked but the feedbacks between them are rarely assessed. Areas with greater tree diversity tend to be more productive, providing a greater carbon sink, and biodiversity loss could reduce these natural C sinks. Here, we quantify how tree and shrub species richness could affect biomass production at biome, national and regional scales. We find that greenhouse gas mitigation could help maintain tree diversity and thereby...

Nitrification and denitrification in the Community Land Model compared to observations at Hubbard Brook Forest

Cynthia Nevison, Christine Goodale, Peter Hess, William Wieder, Julius Vira & Peter Groffman
Models of terrestrial system dynamics often include nitrogen (N) cycles to better represent N limitation of terrestrial carbon (C) uptake but simulating the fate of N in ecosystems has proven challenging. Here, key soil N fluxes and flux ratios from the Community Land Model version 5.0 (CLM5.0) are compared to an extensive set of observations from the Hubbard Brook Forest Long-Term Ecological Research (LTER) site in New Hampshire. Simulated fluxes include microbial immobilization and plant...

Data from: Rapid speciation via the evolution of pre-mating isolation

Sheela Turbek, Melanie Browne, Adrián S. Di Giacomo, Cecilia Kopuchian, Wesley Hochachka, M. Cecilia Estalles, Darío Lijtmaer, Pablo Tubaro, Luís Fábio Silveira, Irby J. Lovette, Rebecca Safran, Scott Taylor & Leonardo Campagna
Behavioral isolation can catalyze speciation and permit the slow accumulation of additional reproductive barriers between co-occurring organisms. We illustrate how this process occurs by examining the genomic and behavioral bases of pre-mating isolation between two bird species (Sporophila hypoxantha and the recently discovered S. iberaensis) that belong to the capuchino seedeaters, a recent, rapid radiation characterized by variation in male plumage coloration and song. Though these two species co-occur without ecological barriers to reproduction, we...

Widely assumed phenotypic associations in Cannabis sativa lack a shared genetic basis

Daniela Vergara
The flowering plant Cannabis sativa, cultivated for centuries for multiple purposes, displays extensive variation in phenotypic traits in addition to its wide array of secondary metabolite production. Notably, Cannabis produces two well-known secondary-metabolite cannabinoids: cannabidiolic acid (CBDA) and delta-9-tetrahydrocannabinolic acid (THCA), which are the main products sought by consumers in the medical and recreational market. Cannabis has several suggested subspecies which have been shown to differ in chemistry, branching patterns, leaf morphology and other traits....

The effects of ENSO and the North American monsoon on mast seeding in two Rocky Mountain conifer species

Andreas Wion, Ian Pearse, Kyle Rodman, Thomas Veblen & Miranda Redmond
We aimed to disentangle the patterns of synchronous and variable cone production (i.e., masting) and its relationship to climate in two conifer species native to dry forests of western North America. We used cone abscission scars to reconstruct ca. 15 years of recent cone production in Pinus edulis and Pinus ponderosa, and used redundancy analysis to relate time series of annual cone production to climate indices describing the North American monsoon and the El Niño...

Terrestrial lichen data for Northwest Territories, Canada

Jennifer Baltzer, Geneviève Degré-Timmons, Nicola Day, Steve Cumming, Merritt Turetsky & Jill Johnstone
Increased fire activity due to climate change may impact the successional dynamics of boreal forests, with important consequences for caribou habitat. Early successional forests have been shown to support lower quantities of caribou forage lichens, but geographic variation in, and controls on, the rates of lichen recovery have been largely unexplored. In this study, we sampled across a broad region in northwestern Canada to compare lichen biomass accumulation in ecoprovinces, including the Saskatchewan Boreal Shield,...

PSP FIELDS Digital Fields Board (DFB) AC-coupled Searchcoil Magnetometer, SCM, Bandpass filtered, Low Frequency, High Gain, u-component, Sensor coordinates, Level 2 (L2), 0.873813 s Data

Stuart D. Bale, Thierry Dudok de Wit, David M. Malaspina, Alexandros Chasapis, Marc Pulupa, Timothy Quinn & Peter Schroeder
PSP FIELDS Digital Fields Board, DFB, SCMulfhg data. The DFB is the low frequency, less than 75 kHz, component of the FIELDS experiment on the Parker Solar Probe spacecraft. DFB AC bandpass data consist of peak and average values of the absolute value of bandpassed time series waveform data over a time interval equal to the reporting cadence. The AC bandpass data have the peak response frequency of each bin reported in the metadata. The...

Registration Year

  • 2021

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  • University of Colorado Boulder
  • University of California, Berkeley
  • University of California, Santa Barbara
  • University of Washington
  • University of Orléans
  • University of Minnesota
  • Laboratory for Atmospheric and Space Physics
  • University of Wisconsin-Madison
  • Charles University