239 Works

Full WRF-Chem output in support of the NASA Atmospheric Carbon and Transport (ACT)-America project (7/1/2016 – 7/31/2019)

S. Feng, T. Lauvaux, Z.R. Barkley, K.J. Davis, M.P. Butler, A. Deng, B. Gaudet & D. Stauffer
The NASA Atmospheric Carbon and Transport (ACT) – America project conducted five airborne campaigns across three regions in the eastern United States to study the transport and fluxes of atmospheric carbon dioxide (CO2) and methane (CH4). Each six-week campaign measured how weather systems transport these greenhouse gases. The objective of the study is to enable more accurate and precise estimates of the sources and sinks of these gases. Better estimates of greenhouse gas sources and...

Model output for determining sector-based CO2 emissions in both pseudodata and real-data inversion analyses of Indianapolis for January-April 2015.

B. Nathan, T. Lauvaux, J. Turnbull & K. Gurney
t We assimilate multiple trace gas species within a single high-resolution Bayesian inversion system to optimize CO2ff emissions for individual source sectors. Starting with carbon monoxide (CO), an atmospheric trace gas with fairly well-known emissions, we use emission factors of CO and CO2ff (called RCO) defined for each source sector to enable us to jointly use CO and CO2 atmospheric mole fractions to constrain CO2ff sectoral emissions. We first show that our combined CO-CO2 inversion...

Shale anisotropy and natural hydraulic fracture propagation: An example from the Posidonienschiefer, Germany

J.N. Hooker, M. Ruhl, A.J. Dickson, L.N. Hanson, E. Idiz, S.P. Hesselbo & J. Cartwright
Cores recovered from the Posidonienschiefer (Posidonia Shale) in the Lower Saxony Basin, Germany, contain calcite filled fractures (veins) at low angle to bedding. The veins preferentially form where the shale is both organic rich and thermally mature, supporting previous interpretations that the veins formed as hydraulic fractures in response to volumetric expansion of organic material during catagenesis. Despite the presence of hydrocarbons during fracturing, the calcite fill is fibrous and so the veins appear to...

Electrodynamic Levitation Diffusion Chamber Measurements of the Mass Growth of Homogeneously-Nucleated Ice Crystals Grown from the Vapor

G. Pokrifka, A. Moyle & J.Y. Harrington
This data set comprises individual time-series for ice crystals grown in an electrodynamic levitation diffusion chamber at temperatures between -36C and -44C. Descriptions of the chamber and experiments can be found in Pokrifka (2018). Experiments were conducted by freezing small (approximately 10 micrometer radius) droplets homogeneously. Frozen droplets were levitated in the diffusion chamber and grown in a constant temperature, pressure, and supersaturation environment. The voltage ratio needed to levitate the particle was recorded as...

Nesting regional WRF-GHG model output from North American domain (27-km) to south gulf region (9-km) for 2015

S. Feng, T. Lauvaux, A. Deng, M.P. Butler & K.J. Davis
This model output provides meteorological states and atmospheric carbon dioxide (CO2) concentrations at hourly interval for the year of 2015. The model is a nesting setup with the outer domain covering the entire North America at 27-km resolution and inner domain covering the south Golf region at 9-km resolution. It was generated to support Gulf Continent's intensive regional study investigating the carbon balance of North America as a whole with special emphasis, including new terrestrial...

Data from Lateral Growth of Ice Crystals Facets during Vapor Depositional Growth

J.Y. Harrington & G. Pokrifka
This data set comprises individual time-series for ice crystals grown by vapor diffusion in laboratory growth chambers along with output from models of lateral growth. Theories for the growth of crystals from the vapor phase generally focus on the normal growth of facets, namely that facets grow outward in the normal direction to the propagation of steps on their surface. Theories of normal growth are well developed and are used to understand the development of...

Subroutines to Calculate the Deposition Coefficients for Ice Crystal Vapor Growth.

J.Y. Harrington, G. Sokolowsky & H. Morrison
This code uses fitting coefficients to calculate supersaturation-dependent deposition coefficients for numerical models. The code takes as input the ambient supersaturation, temperature, and atmospheric pressure, along with the size of the crystal. If the crystal shape is unknown an equivalent volume sphere may be used. The subroutines calculate and return the deposition coefficients.

Lactational performance, rumen fermentation and enteric methane emission of dairy cows fed high-amylase corn silage.

S.F. Cueva, H.A. Stefenoni, A. Melgar, S.E. Räisänen, C.F.A. Lage, D.E. Wasson, M.E. Fetter & A.N. Hristov
The current study investigated the effect of a high-amylase corn silage on lactational performance, enteric methane (CH4) emission, and rumen fermentation of lactating dairy cows. Following a 2-wk covariate period, 48 Holstein cows were blocked based on parity, days-in-milk, milk yield (MY), and CH4 emission. Cows were randomly assigned to 1 of 2 treatments in an 8-wk randomized complete block design experiment: (1) control corn silage (CON) from an isogenic corn without a-amylase trait and...

Electrical Discharges Produce Prodigious Amounts of Hydroxyl and Hydroperoxyl Radicals

J.M. Jenkins & W.H. Brune
Reaction with the hydroxyl radical (OH) is often the first step in the removal of many atmospheric pollutants. The nitrogen oxides (NOx) generated by lightning can increase the amount of HOx (HOx = OH + HO2) present in the atmosphere, but direct HOx production from lightning has never been investigated in the laboratory. In this laboratory study, prodigious amounts of HOx were generated by both visible and subvisible electrical discharges over ranges of pressure and...

Stone Valley Stem Mapped

E.K. Zenner & J.E. Peck
To permit forest structure analyses, two 2.25 ha permanent plots were established in mature (ca. 110 yr old) mixed stratified Eastern Hardwoods forest on the Stone Valley Experimental Forest in 2007. The species, diameter at breast height (DBH), and spatial position of all trees = 5 cm DBH were recorded.

Effects of the macroalga Asparagopsis taxiformis and oregano leaves on methane emission, rumen fermentation, and lactational performance of dairy cows

H.A. Stefenoni, S.E. Räisänen, S.F. Cueva, D.E. Wasson, C.F.A. Lage, A. Melgar, M.E. Fetter, P. Smith, M. Hennessy, B. Vecchiarelli, J. Bender, D. Pitta, C.L. Cantrell, C. Yarish & A.N. Hristov
Asparagopsis taxiformis (AT) is a source of multiple halogenated compounds and, in a limited number of studies, has been shown to decrease enteric CH4 production in vitro and in vivo. Similarly, oregano has also been suggested as a potential CH4 mitigating agent. This study consisted of 2 in vitro and 2 in vivo experiments. Experiment 1 (Exp. 1) was aimed at establishing the effect of AT on total gas production and CH4 emission in vitro....

Shale Network database – A snapshot of the Entire Shale Network database as of March 2021

S.L. Brantley & T. Wen
This data set is a snapshot copy of the entire Shale Network database (https://doi.org/10.4211/his-data-shalenetwork) as of March 3rd, 2021. The Shale Network (http://www.shalenetwork.org/) is a project funded by the National Science Foundation to help scientists and other stakeholders store data for water resources that may be affected by gas exploitation in shale in the U.S.A. Our primary focus currently is the northeastern U.S.A. We want to enable the generation of knowledge from water chemistry and...

Supplementary data, code, and information for ‘Projected changes in persistent extreme summer weather events: The role of quasi-resonant amplification’ (Science Advances, Mann et al. 2018)

M.E. Mann, S.E. Räisänen, K. Kornhuber, B.A. Steinman, S.K. Miller, S. Petri & D. Coumou
Persistent episodes of extreme weather in the Northern Hemisphere summer have been associated with highamplitude quasi-stationary atmospheric Rossby waves, with zonal wave numbers 6 to 8 resulting from the phenomenon of quasi-resonant amplification (QRA). A fingerprint for the occurrence of QRA can be defined in terms of the zonally averaged surface temperature field. Examining state-of-the-art [Coupled Model Intercomparison Project Phase 5 (CMIP5)] climate model projections, we find that QRA events are likely to increase by...

Supplementary data, code, validation statistics, and other information for ‘Proxy-based reconstructions of hemispheric and global surface temperature variations over the past two millennia’ (PNAS, Mann et al. 2008)

M.E. Mann, Z. Zhang, M.K. Hughes, R.S. Bradley, S.K. Miller, S. Rutherford & F. Ni
Following the suggestions of a recent National Research Council report [NRC (National Research Council) (2006) Surface Temperature Reconstructions for the Last 2,000 Years (Natl Acad Press, Washington, DC).], we reconstruct surface temperature at hemispheric and global scale for much of the last 2,000 years using a greatly expanded set of proxy data for decadal-to-centennial climate changes, recently updated instrumental data, and complementary methods that have been thoroughly tested and validated with model simulation experiments. Our...

Supplementary data, code, and information for ‘On forced temperature changes, internal variability, and the AMO’ (Geophysical Research Letters, Mann et al. 2014)

M.E. Mann, B.A. Steinman & S.K. Miller
We estimate the low-frequency internal variability of Northern Hemisphere (NH) mean temperature using observed temperature variations, which include both forced and internal variability components, and several alternative model simulations of the (natural + anthropogenic) forced component alone. We then generate an ensemble of alternative historical temperature histories based on the statistics of the estimated internal variability. Using this ensemble, we show, first, that recent NH mean temperatures fall within the range of expected multidecadal variability....

Supplementary data, code, and information for ‘The likelihood of recent warmth’ (Nature Scientific Reports, Mann et al. 2016)

M.E. Mann, S. Rahmstorf, B.A. Steinman, M. Tingley & S.K. Miller
2014 was nominally the warmest year on record for both the globe and northern hemisphere based on historical records spanning the past one and a half centuries. It was the latest in a recent run of record temperatures spanning the past decade and a half. Press accounts reported odds as low as one-in-650 million that the observed run of global temperature records would be expected to occur in the absence of human-caused global warming. Press...

Effect of neutral winds on the creation of non-specular meteor trail echoes

F. Galindo, J. Urbina & L. Dyrud
Non-specular meteor trail echoes are radar reflections from plasma instabilities that are caused by field-aligned irregularities. Meteor simulations are examined to show that these plasma instabilities, and thus the associated meteor trail echo, strongly depend on the meteoroid properties and the characteristics of the atmosphere in which the meteoroid is embedded. The effects of neutral winds, as a function of altitude, are analyzed to understand how their amplitude variability impacts the temporal–space signatures of non-specular...

Data, Analyses, and Code for Swarmsonde 2019

E.A. Bartos, P. Markowski & Y.P. Richardson
This dataset includes observations, analyses, and Python code for the “Swarmsonde 2019” project, in which swarms of balloon-borne sondes obtained in-situ thermodynamic and wind observations from above the ground in four supercell thunderstorms in May 2019. The supercells intercepted include a tornadic supercell on 17 May 2019 in southwestern Nebraska, a tornadic supercell on 20 May 2019 in southwestern Oklahoma, a nontornadic supercell on 23 May 2019 in the northeast Texas panhandle, and a tornadic...

Supplementary data, code, and information for ‘Evidence for a Modest Undercount Bias in Early Historical Atlantic Tropical Cyclone Counts’ (Mann et al. 2007)

M.E. Mann, T.A. Sabatelli & U. Neu
We obtain new insights into the reliability of long-term historical Atlantic tropical cyclone (‘TC’) counts through the use of a statistical model that relates variations in annual Atlantic TC counts to climate state variables. We find that the existence of a substantial undercount bias in late 19th through mid 20th century TC counts is inconsistent with the statistical relationship between TC counts and climate.

The Finite-Volume Cubed-Sphere Dynamical Core (FV3) Version 1.0 Dataset

D. Fan, S.J. Greybush, X. Chen, Y.H. Lu, F. Zhang & G.S. Young
The Finite-Volume Cubed-Sphere Dynamical Core (FV3) dataset version 1.0 contains hourly gridded atmospheric variables over the globe, spanning 24 August 2017 through 26 August 2017. The dataset includes gridded fields of horizontal wind at select levels (700 hPa, 300 hPa, and 100 hPa) and brightness temperature from several runs of the model at 3km, 6km, and 13km grid spacing. The Community Radiative Transfer Model (CRTM), version 2.3.0, was employed to translate model state variables into...

True or False IDO Data February 20, 2020 11.52

S.L. Eaddy, X. Lu, Y. Gin & L. Austin
COVID-19 measures have necessarily disrupted vaccinations and have been detrimental to measles prevention. As of October 2021, nearly 41 countries had paused their measles campaigns, leaving more than 94 million people at risk of missing vaccines. Therefore, it is critical for public health officials to continue to provide resources, promote vaccination, and change behaviors despite the pandemic. The study’s purpose is to enhance the information-environment level, population-level, and system-level outcomes to determine infectious disease outbreak...

Supplementary data, code, and information for ‘Northern Hemisphere Temperatures During the Past Millennium: Inferences, Uncertainties, and Limitations’ (Mann et al. 1999 – the second ‘Hockey Stick’ paper [MBH99])

M.E. Mann, R.S. Bradley & M.K. Hughes
Building on recent studies, we attempt hemispheric temperature reconstructions with proxy data networks for the past millennium. We focus not just on the reconstructions, but the uncertainties therein, and important caveats. Though expanded uncertainties prevent decisive conclusions for the period prior to AD 1400, our results suggest that the latter 20th century is anomalous in the context of at least the past millennium. The 1990s was the warmest decade, and 1998 the warmest year, at...

Improving the Analysis and Forecast of Hurricane Dorian (2019) with Simultaneous Assimilation of GOES-16 All-Sky Infrared Brightness Temperatures and Tail Doppler Radar Radial Velocities

C.M. Hartman, X. Chen, E.E. Clothiaux & M. Chan
Recent studies have shown that the assimilation of all-sky infrared (IR) observations can be beneficial for tropical cyclone analyses and predictions. The assimilation of tail Doppler radar (TDR) radial velocity observations has also been shown to improve tropical cyclone analyses and predictions; however, there is a paucity of literature on the impacts of simultaneously assimilating them with all-sky IR brightness temperatures (BTs). This study examines the impacts of assimilating combinations of GOES-16 all-sky IR brightness...

Small mammal use of tick control tubes is dependent on month of use but independent of odor attractant or cotton size

K.D. Green, H.S. Tiffin, J.E. Brown, E.R. Burgess & E.T. Machtinger
Small mammal use of tick control tubes is dependent on month of use but independent of odor attractant or cotton size

Registration Year

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Affiliations

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    145
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