Woodwell Climate Research Center

Alaska North Slope HYDRATE 02 Geo Data Well (GDW) Downhole Logging, Pressure Coring, and Completion Operations and Data

Abstract The “Collaborative Gas Hydrate R&D Project in Alaska,” led by the Japan Organization for Metals and Energy Security (JOGMEC), the U.S. Department of Energy (DOE), and the U.S. Geological Survey, aims to examine and assess gas hydrate reservoir systems, their production b...

Signaturesof Black Hole Spin in Horizon-Scale Polarimetry

The angular momentum of a black hole, usually expressed in terms of a dimensionless “spin,” both shapes the strong-field spacetime and provides a reservoir of rotational energy that can be exchanged with surrounding plasma. Very long baseline interferometry (VLBI) has now begun t...

Black boxes in black hole imaging

We investigate the epistemic opacity of computer simulations and machine learning methods in the context of black hole imaging. We argue that there are forms of opacity—including opacity resulting from the use of machine learning—which do not need to affect the reliability of an...

A Brief Review of Spin Signatures in Time-Averaged Total Intensity Images of LLAGN Accretion Flows

As images of the supermassive black holes Messier 87* (M87*) and Sagittarius A* (Sgr A*) from the Event Horizon Telescope (EHT) grow in number, we gain a better understanding of the typical conditions of the near-horizon region of these objects, and slowly approach a converged ti...

Tuning Deep Eutectic Solvents for Greener Oxidations: The Role of Solvent Properties in Aldehyde-to-Acid Transformations

Abstract Deep eutectic solvents (DESs) are emerging sustainable alternatives to traditional organic solvents, yet their influence on chemical reactivity remains underexplored. Here, we investigate the oxidation of aldehydes to carboxylic acids using diluted hydrogen peroxide in a...