Explanipedia

Increasing soil respiration in a northern hardwood forest indicates symptoms of a changing carbon cycle Open

Angela R. Possinger, Charles T. Driscoll, Mark B. Green, Timothy J. Fahey, Chris E. Johnson , et al. · 2025

Temporal and Spatial Dynamics of Soil Carbon Cycling and Its Response to Environmental Change in a Northern Hardwood Forest Open

Sophie F. von Fromm, Connor I. Olson, Michael W. Monroe, Carlos A. Sierra, Charles T. Driscoll , et al. · 2025

The timescales over which soil carbon responds to global change are a major uncertainty in the terrestrial carbon cycle. Radiocarbon measurements on archived soil samples are an important tool for addressing this uncertainty. We present ti…

Formication with destruction of the nasal septum: A rare case report Open

Martha V. White, D I Evans, Gary Frey, Chris E. Johnson, Ben F. Warner · 2025

Delusions of parasitosis are known by several names, one of which is formication. It is an uncommon psychiatric disorder listed in the DSM V under the classification of delusional disorders. Patients experience an established, incorrect be…

Calibration Unit Design for High Resolution Infrared Spectrograph for Exoplanet Characterization (HISPEC) Open

Ben Sappey, Quinn Konopacky, Nemanja Jovanović, Ashley Baker, Jérôme Maîre , et al. · 2023

The latest generation of high-resolution spectrograph instruments on 10m-class telescopes continues to pursue challenging science cases. Consequently, evermore precise calibration methods are necessary to enable trail-blazing science metho…

Net Geochemical Release of Base Cations From 25 Forested Watersheds in the Catskill Region of New York Open

Sara C. Nieman, Chris E. Johnson · 2021

Chemical weathering of minerals is the principal mechanism by which base cations (Ca 2+ , Mg 2+ , K + , and Na + ) are released and acidity is neutralized in soils, bedrock, and drainage waters. Quantifying the release of base cations from…

SoDaH: the SOils DAta Harmonization database, an open-source synthesis of soil data from research networks, version 1.0 Open

William R. Wieder, Derek Pierson, Stevan Earl, Kate Lajtha, Sara G. Baer , et al. · 2021

Data collected from research networks present opportunities to test theories and develop models about factors responsible for the long-term persistence and vulnerability of soil organic matter (SOM). Synthesizing datasets collected by diff…

Simulation of the effects of forest harvesting under changing climate to inform long-term sustainable forest management using a biogeochemical model Open

Mahnaz Valipour, Chris E. Johnson, John J. Battles, John L. Campbell, Timothy J. Fahey , et al. · 2021

The InfraRed Imaging Spectrograph (IRIS) for TMT: photometric characterization of anisoplanatic PSFs and testing of PSF-Reconstruction via AIROPA Open

Nils-Erik Rundquist, S. Wright, Matthias Schöck, Arun Surya, Jessica R. Lu , et al. · 2020

The InfraRed Imaging Spectrograph (IRIS) is a first-light instrument for the\nThirty Meter Telescope (TMT) that will be used to sample the corrected adaptive\noptics field by the Narrow-Field Infrared Adaptive Optics System (NFIRAOS) with\…

The Keck Planet Imager and Characterizer: A dedicated single-mode fiber injection unit for high resolution exoplanet spectroscopy Open

Jacques-Robert Delorme, Nemanja Jovanović, Daniel Echeverri, Dimitri Mawet, J. Kent Wallace , et al. · 2020

The Keck Planet Imager and Characterizer (KPIC) is a purpose-built instrument to demonstrate new tech- nological and instrumental concepts initially developed for the exoplanet direct imaging field. Located downstream of the current Keck I…

SoDaH: the SOils DAta Harmonization database, an open-sourcesynthesis of soil data from research networks, version 1.0 Open

William R. Wieder, Derek Pierson, Stevan Earl, Kate Lajtha, Sara G. Baer , et al. · 2020

Data collected from research networks present opportunities to test theories and develop models about factors responsible for the long-term persistence and vulnerability of soil organic matter (SOM). Synthesizing datasets collected by diff…

Sr isotopes indicate millennial-scale formation of metal-rich layers by reactive melt percolation in an open-system layered intrusion Open

J. Stephen Daly, Luke N. Hepworth, Brian O’Driscoll, Chris E. Johnson, Ralf Gertisser , et al. · 2020

<p>In order to test whether the crystal mushes that form layered mafic intrusions can behave as open systems, we investigated mineral-scale textural, chemical and Sr isotopic heterogeneity in the c. 60 Ma Rum intrusion, Scotland. Wit…

Modeling the interactions of forest cutting and climate change on the hydrology, biomass and biogeochemistry of a northeastern forest Open

Mahnaz Valipour, Charles T. Driscoll, Chris E. Johnson, John J. Battles, John L. Campbell , et al. · 2019

Global and regional environmental disturbances, including harvesting and climate change, can lead to integrated and interactive effects on forest ecosystems, altering their structure and function, and therefore long-term sustainability. Un…

Ensembles of Global Climate Model Variants Designed for the Quantification and Constraint of Uncertainty in Aerosols and Their Radiative Forcing Open

Masaru Yoshioka, Leighton A. Regayre, K. J. Pringle, Jill S. Johnson, G. W. Mann , et al. · 2019

Tropospheric aerosol radiative forcing has persisted for many years as one of the major causes of uncertainty in global climate model simulations. To sample the range of plausible aerosol and atmospheric states and perform robust statistic…

Reply to the comment by Bailey et al. on “Long-term decline of sugar maple following forest harvest, Hubbard Brook Experimental Forest, New Hampshire” Open

John J. Battles, Natalie L. Cleavitt, Chris E. Johnson, Timothy J. Fahey · 2019

Sugar maple decline in eastern North America is caused by a complex combination of factors, with soil nutrition being one of several important determinants. Given the complexity of sugar maple population dynamics and the geographic extent …

Losses of mineral soil carbon largely offset biomass accumulation 15 years after whole-tree harvest in a northern hardwood forest Open

Steven P. Hamburg, Matthew A. Vadeboncoeur, Chris E. Johnson, Jonathan Sanderman · 2019

How does car seat appearance influence perceived comfort Open

Tuğra Erol, Cyriel Diels, James Shippen, Dale Richards, Chris E. Johnson · 2019

Automotive seat comfort has become a major aspect in differentiation and customisation amongst competitors in a highly saturated automotive market. Unlike discomfort, the concept of comfort is regarded a highly subjective and multi-faceted…

Improved Aerosol Processes and Effective Radiative Forcing in HadGEM3 and UKESM1 Open

Jane P. Mulcahy, Colin Jones, Alistair Sellar, Ben Johnson, Ian Boutle , et al. · 2018

Aerosol processes and, in particular, aerosol‐cloud interactions cut across the traditional physical‐Earth system boundary of coupled Earth system models and remain one of the key uncertainties in estimating anthropogenic radiative forcing…

Seasonal Wetness, Soil Organic Carbon, and Fire Influence Soil Hydrological Properties and Water Repellency in a Sagebrush‐Steppe Ecosystem Open

D. G. Chandler, Yang Cheng, M. S. Seyfried, Matthew D. Madsen, Chris E. Johnson , et al. · 2018

Prescribed fire is an important tool for rangeland management in sage‐steppe ecosystems, yet the long‐term effects of this practice on soil hydraulic properties are not well known. We explore interactions among site geomorphology, soil org…

The infrared imaging spectrograph (IRIS) for TMT: electronics-cable architecture Open

Adam Trapp, James Larkin, Ken Magnone, Timothée Greffe, Tim Hardy , et al. · 2018

The InfraRed Imaging Spectrograph (IRIS) is a first-light instrument for the Thirty Meter Telescope (TMT). It combines a diffraction limited imager and an integral field spectrograph. This paper focuses on the electrical system of IRIS. Wi…

An overview of the NIRSPEC upgrade for the Keck II telescope Open

Emily C. Martin, Michael P. Fitzgerald, Ian S. McLean, Gregory Doppmann, Marc Kassis , et al. · 2018

NIRSPEC is a 1-5 micron echelle spectrograph in use on the Keck II Telescope since 1999. The spectrograph is capable of both moderate (R~2,000) and high (R~25,000) resolution observations and has been a workhorse instrument across many ast…

Design Concept for the In Situ Nanoprobe Beamline for the APS Upgrade Open

J. Mäser, Barry Lai, Vincent De Andrade, Simon R. Bare, Mariana I. Bertoni , et al. · 2018

Development of the Arizona Robotic Telescope Network Open

Benjamin J. Weiner, Dennis Zaritsky, Pavel Gabor, Buell T. Jannuzi, Victor Gasho , et al. · 2018

The Arizona Robotic Telescope Network (ARTN) project is a long term effort to\ndevelop a system of telescopes to carry out a flexible program of PI observing,\nsurvey projects, and time domain astrophysics including monitoring, rapid\nresp…

Long-term decline of sugar maple following forest harvest, Hubbard Brook Experimental Forest, New Hampshire Open

Natalie L. Cleavitt, John J. Battles, Chris E. Johnson, Timothy J. Fahey · 2017

Forest harvesting can impact site quality by removing essential nutrients, exacerbating the effects of historic base cation losses associated with acid deposition. We studied the 30-year trajectory of forest recovery from clearcutting (who…

Preface to the special issue for the 8th International Symposium on Forest Soils: Linking Soil Processes to Forest Productivity and Water Protection under Global Change Open

Zhiqun Huang, Scott X. Chang, Peter W. Clinton, Chris E. Johnson, Hailong Wang , et al. · 2017

Aluminum is more tightly bound in soil after wollastonite treatment to a forest watershed Open

Weiyao Gu, Charles T. Driscoll, Shuai Shao, Chris E. Johnson · 2017

Behavior-Based Freight Modeling at Metro Open

Chris E. Johnson, Bud Reiff · 2017

Chris Johnson and Bud Reiff will present on a behavior-based freight model being used at Oregon Metro. This model will replace Metro’s current truck model with a hybrid freight model that both represents multi-modal freight flows through e…

Methods of Soil Resampling to Monitor Changes in the Chemical Concentrations of Forest Soils Open

Gregory B. Lawrence, Ivan J. Fernandez, Paul W. Hazlett, Scott W. Bailey, Donald S. Ross , et al. · 2016

Recent soils research has shown that important chemical soil characteristics can change in less than a decade, often the result of broad environmental changes. Repeated sampling to monitor these changes in forest soils is a relatively new …

Silica uptake and release in live and decaying biomass in a northern hardwood forest Open

Wim Clymans, Daniel J. Conley, John J. Battles, Patrick Frings, Mary Margaret Koppers , et al. · 2016

In terrestrial ecosystems, a large portion (20–80%) of the dissolved Si ( DS i) in soil solution has passed through vegetation. While the importance of this “terrestrial Si filter” is generally accepted, few data exist on the pools and flu…

Natural and anthropogenic drivers of calcium depletion in a northern forest during the last millennium Open

Bérangère Leys, Gene E. Likens, Chris E. Johnson, Joseph M. Craine, Brice Lacroix , et al. · 2016

Significance This research breaks new ground by showing that, contrary to generally accepted theories of ecosystem development, calcium depletion has been occurring for millennia as a natural consequence of long-term ecosystem development.…

Fine root biomass declined in response to restoration of soil calcium in a northern hardwood forest Open

Timothy J. Fahey, Alexis K. Heinz, John J. Battles, Melany C. Fisk, Charles T. Driscoll , et al. · 2016

Forest health deteriorated in eastern North America as a result of depletion of available soil base cations by elevated inputs of acid deposition. We experimentally restored available calcium (Ca) to soils of a forested watershed at Hubbar…

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