Results 11 to 20 of about 1,220,472 (246)

Trophic Downgrading of Planet Earth

Science, 2011
Until recently, large apex consumers were ubiquitous across the globe and had been for millions of years. The loss of these animals may be humankind’s most pervasive influence on nature. Although such losses are widely viewed as an ethical and aesthetic problem, recent research reveals extensive cascading effects of their disappearance in marine ...
Estes, JA, Terborgh, J, Brashares, JS, Power, ME, Berger, J, Bond, WJ, Carpenter, SR, Essington, TE, Holt, RD, Jackson, JBC, Marquis, RJ, Oksanen, L, Oksanen, T, Paine, RT, Pikitch, EK, Ripple, WJ, Sandin, SA, Scheffer, M, Schoener, TW, Shurin, JB, Sinclair, ARE, Soule, ME, Virtanen, R, Wardle, DA   +23 more
openaire   +4 more sources

GJ 367b: A dense, ultrashort-period sub-Earth planet transiting a nearby red dwarf star [PDF]

Science, 2021
Description A nearby iron-rich sub-Earth planet The mass and radius of an exoplanet determine its mean density, which provides information about the possible interior structure. Lam et al.
K. Lam, S. Csizmadia, N. Astudillo-Defru, X. Bonfils, D. Gandolfi, S. Padovan, M. Esposito, C. Hellier, T. Hirano, J. Livingston, F. Murgas, Alexis M. S. Smith, K. Collins, S. Mathur, R. García, S. Howell, N. Santos, F. Dai, G. Ricker, R. Vanderspek, D. Latham, S. Seager, J. Winn, J. Jenkins, S. Albrecht, J. Almenara, É. Artigau, O. Barragán, F. Bouchy, J. Cabrera, D. Charbonneau, P. Chaturvedi, A. Chaushev, J. Christiansen, W. Cochran, José R. De Meideiros, X. Delfosse, R. Díaz, R. Doyon, P. Eigmüller, P. Figueira, T. Forveille, M. Fridlund, G. Gaisné, E. Goffo, I. Georgieva, S. Grziwa, E. Guenther, A. Hatzes, Marshall C. Johnson, P. Kabáth, E. Knudstrup, J. Korth, P. Lewin, J. Lissauer, C. Lovis, R. Luque, C. Melo, E. Morgan, R. Morris, M. Mayor, N. Narita, H. Osborne, E. Pallé, F. Pepe, C. Persson, S. Quinn, H. Rauer, S. Redfield, J. Schlieder, D. Ségransan, L. Serrano, Jeffrey C. Smith, J. Šubjak, J. Twicken, S. Udry, V. Van Eylen, M. Vezie   +77 more
semanticscholar   +1 more source

Evidence for the volatile-rich composition of a 1.5-Earth-radius planet [PDF]

Nature Astronomy, 2022
The population of planets smaller than approximately 1.7 Earth radii ( R _⊕) is widely interpreted as consisting of rocky worlds, generally referred to as super-Earths.
C. Piaulet, B. Benneke, J. Almenara, D. Dragomir, H. Knutson, D. Thorngren, Merrin Peterson, I. Crossfield, Eliza M.-R. Kempton, D. Kubyshkina, A. Howard, R. Angus, H. Isaacson, L. Weiss, C. Beichman, J. Fortney, L. Fossati, H. Lammer, P. McCullough, C. Morley, I. Wong   +20 more
semanticscholar   +1 more source

Venus, the Planet: Introduction to the Evolution of Earth’s Sister Planet

Space Science Reviews, 2023
Venus is the planet in the Solar System most similar to Earth in terms of size and (probably) bulk composition. Until the mid-20th century, scientists thought that Venus was a verdant world—inspiring science-fictional stories of heroes battling megafauna
J. O'Rourke, Colin F. Wilson, M. Borrelli, P. Byrne, C. Dumoulin, R. Ghail, A. Gülcher, Seth Andrew Jacobson, O. Korablev, T. Spohn, M. Way, M. Weller, F. Westall   +12 more
semanticscholar   +1 more source

EM-Earth: The Ensemble Meteorological Dataset for Planet Earth

Bulletin of The American Meteorological Society - (BAMS), 2022
Gridded meteorological estimates are essential for many applications. Most existing meteorological datasets are deterministic and have limitations in representing the inherent uncertainties from both the data and methodology used to create gridded ...
Guoqiang Tanga, Martyn P. Clarka, Simon Michael Papalexiouc   +2 more
semanticscholar   +1 more source

The First Habitable-zone Earth-sized Planet from TESS. I. Validation of the TOI-700 System [PDF]

Astronomical Journal, 2020
We present the discovery and validation of a three-planet system orbiting the nearby (31.1 pc) M2 dwarf star TOI-700 (TIC 150428135). TOI-700 lies in the TESS continuous viewing zone in the Southern Ecliptic Hemisphere; observations spanning 11 sectors ...
E. Gilbert, T. Barclay, J. Schlieder, E. Quintana, B. Hord, V. Kostov, E. Lopez, J. Rowe, K. Hoffman, L. Walkowicz, M. Silverstein, Joseph E. Rodriguez, A. Vanderburg, G. Suissa, V. Airapetian, M. Clement, S. Raymond, A. Mann, Ethan Kruse, J. Lissauer, K. Colón, R. Kopparapu, L. Kreidberg, Sebastian Zieba, K. Collins, S. Quinn, S. Howell, C. Ziegler, E. Vrijmoet, F. Adams, G. Arney, P. Boyd, J. Brande, C. Burke, Luca Cacciapuoti, Quadry Chance, J. Christiansen, G. Covone, T. Daylan, Danielle S. Dineen, C. Dressing, Z. Essack, T. Fauchez, Brianna Galgano, A. Howe, L. Kaltenegger, S. Kane, Christopher Lam, Eve J. Lee, N. Lewis, S. Logsdon, A. Mandell, T. Monsue, F. Mullally, S. Mullally, R. Paudel, D. Pidhorodetska, P. Plavchan, Naylynn Tañón Reyes, S. Rinehart, B. Rojas-Ayala, Jeffrey C. Smith, K. Stassun, P. Tenenbaum, L. Vega, G. Villanueva, E. Wolf, A. Youngblood, G. Ricker, R. Vanderspek, D. Latham, S. Seager, J. Winn, J. Jenkins, G. Bakos, C. Briceño, D. Ciardi, R. Cloutier, D. Conti, A. Couperus, M. D. Sora, N. Eisner, M. Everett, T. Gan, J. Hartman, T. Henry, G. Isopi, W. Jao, E. Jensen, N. Law, F. Mallia, R. Matson, B. Shappee, M. Wood, J. Winters   +94 more
semanticscholar   +1 more source

Inferring the instability of a dynamical system from the skill of data assimilation exercises [PDF]

Nonlinear Processes in Geophysics, 2021
Data assimilation (DA) aims at optimally merging observational data and model outputs to create a coherent statistical and dynamical picture of the system under investigation.
Y. Chen, Y. Chen, A. Carrassi, A. Carrassi, A. Carrassi, V. Lucarini, V. Lucarini   +6 more
doaj   +1 more source

The Brahmavarta Initiative: A Roadmap for the First Self-Sustaining City-State on Mars

Universe, 2022
The vast universe, from its unfathomable ends to our very own Milky Way galaxy, is comprised of numerous celestial bodies—disparate yet each having their uniqueness.
Arvind Mukundan, Hsiang-Chen Wang
doaj   +1 more source

A candidate super-Earth planet orbiting near the snow line of Barnard’s star [PDF]

Nature, 2018
Barnard’s star is a red dwarf, and has the largest proper motion (apparent motion across the sky) of all known stars. At a distance of 1.8 parsecs1, it is the closest single star to the Sun; only the three stars in the α Centauri system are closer ...
I. Ribas, M. Tuomi, A. Reiners, R. P. Butler, J. Morales, M. Perger, S. Dreizler, C. Rodríguez-López, J. Hernández, J. Hernández, A. Rosich, F. Feng, T. Trifonov, S. Vogt, J. Caballero, A. Hatzes, E. Herrero, S. Jeffers, M. Lafarga, F. Murgas, F. Murgas, R. Nelson, E. Rodríguez, J. Strachan, L. Tal-Or, L. Tal-Or, J. Teske, B. Toledo-Padrón, B. Toledo-Padrón, M. Zechmeister, A. Quirrenbach, P. Amado, M. Azzaro, V. Béjar, V. Béjar, J. Barnes, Z. Berdiñas, J. Burt, G. Coleman, M. Cortés-Contreras, J. Crane, S. Engle, E. Guinan, C. Haswell, T. Henning, B. Holden, J. Jenkins, H. R. Jones, A. Kaminski, M. Kiraga, M. Kürster, M. Lee, M. López-González, D. Montes, J. Morin, A. Ofir, E. Pallé, E. Pallé, R. Rebolo, R. Rebolo, S. Reffert, A. Schweitzer, W. Seifert, S. Shectman, D. Staab, R. Street, A. Mascareño, A. Mascareño, Y. Tsapras, S. Wang, G. Anglada-Escudé, G. Anglada-Escudé   +71 more
semanticscholar   +1 more source

Lévy noise versus Gaussian-noise-induced transitions in the Ghil–Sellers energy balance model [PDF]

Nonlinear Processes in Geophysics, 2022
We study the impact of applying stochastic forcing to the Ghil–Sellers energy balance climate model in the form of a fluctuating solar irradiance. Through numerical simulations, we explore the noise-induced transitions between the competing warm and ...
V. Lucarini, V. Lucarini, V. Lucarini, L. Serdukova, L. Serdukova, G. Margazoglou, G. Margazoglou   +6 more
doaj   +1 more source