Zobrazeno 1 - 10
of 350
pro vyhledávání: '"Catling, David"'
Autor:
Jones, Michael W. M., Flannery, David T., Hurowitz, Joel A., Tice, Mike T., Schrank, Christoph E., Allwood, Abigail C., Tosca, Nicholas J., Catling, David C., VanBommel, Scott J., Knight, Abigail L., Ganly, Briana, Siebach, Kirsten L., Benison, Kathleen C., Broz, Adrian P., Zorzano, Maria-Paz, Heirwegh, Chris M., Orenstein, Brendan J., Clark, Benton C., Sinclair, Kimberly P., Shumway, Andrew O., Wade, Lawrence A., Davidoff, Scott, Nemere, Peter, Wright, Austin P., Galvin, Adrian E., Randazzo, Nicholas, Martinez-Frias, Jesus, ONeil, Lauren P.
Late-stage Ca-sulfate-filled fractures are common on Mars. Notably, the Shenandoah formation in the western edge of Jezero crater preserves a variety of Ca-sulfate minerals in the fine-grained siliciclastic rocks explored by the Perseverance rover. H
Externí odkaz:
http://arxiv.org/abs/2410.05615
Autor:
Thomas, Trent B., Catling, David C.
Publikováno v:
Nat Commun 15, 7055 (2024)
At least two global "Snowball Earth" glaciations occurred during the Neoproterozoic Era (1000-538.8 million years ago). Post-glacial surface environments during this time are recorded in cap carbonates: layers of limestone or dolostone that directly
Externí odkaz:
http://arxiv.org/abs/2408.10179
Autor:
Young, Amber V., Robinson, Tyler D., Krissansen-Totton, Joshua, Schwieterman, Edward W., Wogan, Nicholas F., Way, Michael J., Sohl, Linda E., Arney, Giada N., Reinhard, Christopher T., Line, Michael R., Catling, David C., Windsor, James D.
Chemical disequilibrium quantified via available free energy has previously been proposed as a potential biosignature. However, exoplanet biosignature remote sensing work has not yet investigated how observational uncertainties impact the ability to
Externí odkaz:
http://arxiv.org/abs/2311.06083
The origin of life on Earth would benefit from a prebiotic atmosphere that produced nitriles, like HCN, which enable ribonucleotide synthesis. However, geochemical evidence suggests that Hadean air was relatively oxidizing with negligible photochemic
Externí odkaz:
http://arxiv.org/abs/2307.09761
Autor:
Méndez, Abel, Rivera-Valentín, Edgard E., Schulze-Makuch, Dirk, Filiberto, Justin, Ramírez, Ramses M., Wood, Tana, Dávila, Alfonso, McKay, Chris, Ceballos, Kevin N. Ortiz, Jusino-Maldonado, Marcos, Torres-Santiago, Nicole J., Nery, Guillermo, Heller, René, Byrne, Paul K., Malaska, Michael J., Nathan, Erica, Simões, Marta F., Antunes, André, Martínez-Frías, Jesús, Carone, Ludmila, Izenberg, Noam R., Atri, Dimitra, Chitty, Humberto I. Carvajal, Nowajewski-Barra, Priscilla, Rivera-Hernández, Frances, Brown, Corine, Lynch, Kennda, Catling, David, Zuluaga, Jorge I., Salazar, Juan F., Chen, Howard, González, Grizelle, Jagadeesh, Madhu Kashyap, Haqq-Misra, Jacob
Habitability has been generally defined as the capability of an environment to support life. Ecologists have been using Habitat Suitability Models (HSMs) for more than four decades to study the habitability of Earth from local to global scales. Astro
Externí odkaz:
http://arxiv.org/abs/2108.05417
Publikováno v:
Front. Astron. Space Sci., July 8, 2021
In the search for life on other planets, the presence of photosynthetic vegetation may be detectable from the colors of light it reflects. On the modern Earth, this spectral reflectance is characterized by an increase in reflectance between the red a
Externí odkaz:
http://arxiv.org/abs/2107.04120
Publikováno v:
2017, Icarus 290 pgs. 46-62
Mars today has no active volcanism and its atmosphere is oxidizing, dominated by the photochemistry of CO2 and H2O. Using a one-dimensional photochemical model, we consider whether plausible volcanic gas fluxes could have switched the redox-state of
Externí odkaz:
http://arxiv.org/abs/2103.13012
Publikováno v:
Nature Communications 11, 6153. December 2020
In the conventional habitable zone (HZ) concept, a CO$_{2}$-H$_2$O greenhouse maintains surface liquid water. Through the water-mediated carbonate-silicate weathering cycle, atmospheric CO$_{2}$ partial pressure (pCO$_{2}$) responds to changes in sur
Externí odkaz:
http://arxiv.org/abs/2012.00819
Publikováno v:
The Planetary Science Journal, 1(3):58, Oct 2020
The disequilibrium combination of abundant methane and carbon dioxide has been proposed as a promising exoplanet biosignature that is readily detectable with upcoming telescopes such as the James Webb Space Telescope. However, few studies have explor
Externí odkaz:
http://arxiv.org/abs/2009.07761