Results 51 to 60 of about 1,022,516 (264)

Model-dependence of the CO₂ threshold for melting the hard Snowball Earth [PDF]

Climate of the Past, 2011
One of the critical issues of the Snowball Earth hypothesis is the CO2 threshold for triggering the deglaciation. Using Community Atmospheric Model version 3.0 (CAM3), we study the problem for the CO2 threshold.
W. R. Peltier, F. Ding, J. Yang, Y. Hu
doaj   +1 more source

The initiation of modern soft and hard Snowball Earth climates in CCSM4 [PDF]

Climate of the Past, 2012
Geochemical and geological evidence has suggested that several global-scale glaciation events occurred during the Neoproterozoic Era in the interval from 750–580 million years ago. The initiation of these glaciations is thought to have been a consequence
J. Yang, W. R. Peltier, Y. Hu
doaj   +1 more source

Aftermath of a snowball Earth [PDF]

Geochemistry, Geophysics, Geosystems, 2003
Using a simple 3‐box model of the ocean‐atmosphere system, we simulate the cycling of carbon and strontium in the aftermath of a global glaciation. Model simulations include the delivery of alkalinity to seawater from intense carbonate and silicate weathering under high pCO2 conditions as well as ocean mixing, air‐sea gas exchange, and biological ...
John A. Higgins, Daniel P. Schrag
openaire   +1 more source

Extension Economists: Valued in Mission, Penalized in Practice

Applied Economic Perspectives and Policy, EarlyView.
ABSTRACT As the public engagement arm of the land‐grant mission, we argue that Extension faculty in US agricultural economics departments face an identity crossroads as they struggle for institutional support. Specifically, we argue that Extension economists function as boundary‐spanning professionals within academic structures that often devalue ...
Trey Malone, Craig W. Carpenter, Courtney Bir, Andrew J. Van Leuven, Rebecca Wasserman‐Olin, Wendong Zhang   +5 more
wiley   +1 more source

Mid-latitudinal habitable environment for marine eukaryotes during the waning stage of the Marinoan snowball glaciation

Nature Communications, 2023
Based on geochemical and paleontological data, this study shows that habitable open-oceans extended to mid-latitude coastal oceans during the waning stage of the Marinoan snowball Earth, offering refugia for benthic photosynthetic ...
Huyue Song, Zhihui An, Qin Ye, Eva E. Stüeken, Jing Li, Jun Hu, Thomas J. Algeo, Li Tian, Daoliang Chu, Haijun Song, Shuhai Xiao, Jinnan Tong   +11 more
doaj   +1 more source

Border harm and affective injustice: The politics of anger at the Melilla border, Spain

American Journal of Community Psychology, EarlyView.
Abstract This article examines protests in a detention center in Melilla, Spain—a site where structural violence intersects with the everyday harms of confinement. Adopting a justice and dignity‐centered perspective, we analyze grassroots forms of resistance emerging at the border. The study focuses on the protests of Tunisian migrants and explores the
Corina Tulbure
wiley   +1 more source

Australian Activists as Storytellers in Digital Spaces: Acquiring Skills, Producing Content and Getting the Message Out

Australian Journal of Social Issues, EarlyView.
ABSTRACT As modes of activism rapidly evolve, activists—both seasoned and emerging—must increasingly navigate a hybrid terrain of both digital and non‐digital engagement. This paper draws on the personal narratives of 16 nascent activists based in Australia to explore how they develop competencies related to digital storytelling, which is critical to ...
Garth Stahl, Miri Yemini, Claire Maxwell, Yating Hu, Benjamin Adams, Sarah Bergen   +5 more
wiley   +1 more source

Molecular and isotopic signatures of life surrounding the Neoproterozoic Snowball Earth events [PDF]

, 2017
Life on Earth transitioned from being mainly dominated by bacteria prior to the Cryogenian Snowball Earth events (717a 635 Ma) to an ecosystem in which biologically more complex eukaryotes (e.g.
Van Maldegem, Lennart Martijn
core  

‘Shelter is a Dignity’: Rental Racism, Stress and Housing (In)justice

Australian Journal of Social Issues, EarlyView.
ABSTRACT Australia's private rental sector is in crisis, and culturally and racially minoritised renters face compounded harms through both covert and everyday direct forms of rental racism. Drawing on five community‐based focus groups in Melbourne (n = 37), the paper explores how racism manifests across the rental pathway and how it structures the ...
Erika Martino, Ilan Wiesel, Ang Li, Rebecca Bentley   +3 more
wiley   +1 more source

Continental weathering following a Cryogenian glaciation: evidence from calcium and magnesium isotopes [PDF]

, 2014
A marked ocean acidification event and elevated atmospheric carbon dioxide concentrations following the extreme environmental conditions of the younger Cryogenian glaciation have been inferred from boron isotope measurements.
Prave, Anthony R., von Strandmann, Philip A. E. Pogge, Pogge von Strandmann, Philip A.E., Elliott, T., Fallick, A.E., Pogge von Strandmann, P.A.E., Elliott, Tim, Kasemann, Simone A., Hoffmann, Karl-Heinz, Prave, A.R., Hoffmann, K.-H., Fallick, Anthony E., Kasemann, S.A.   +12 more
core   +1 more source