Results 131 to 140 of about 4,213 (306)

Evolution in a changing environment [PDF]

We propose a simple model, based on Monte Carlo simulations, for studying the effects of changes in the environment on the adaptation and extinction of evolving species.
Rafal Weron, Katarzyna Sznajd-Weron
core  

BORON PROXIES IN PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY

, 2018
Anthropogenic carbon dioxide emissions do not only warm our planet but also acidify our oceans. It is currently unclear to which degree Earth’s climate and marine life will be impacted by these changes but information from Earth history, particularly the
Hönisch, Bärbel, Lorbacher, Katja, Eggins, Stephen M., Haynes, Laura L., Allen, Katherine A., Holland, Katherine D.   +5 more
core   +1 more source

Spatial Variability of Permafrost and Active Layer Thickness in a Forested Hillslope of the Taiga Shield

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Under continued climate warming, understanding present‐day permafrost distribution and the controls on ground thaw are critical for predicting permafrost thaw trajectories and associated implications. This study presents a high‐resolution investigation of permafrost extent and active layer thickness (ALT) across a coniferous forested hillslope
Alana Muenchrath, Christopher Spence, Andrew Ireson   +2 more
wiley   +1 more source

IMPACTS OF THE 2002 DROUGHT ON WESTERN RANCHES AND PUBLIC LAND POLICIES

Land Economics/Use,
Tronstad, Russell, Feuz, Dillon M.
core  

A Statistical‐Process Hybridized Approach to Modeling Permafrost Distribution in a Boreal Wetland Ecosystem, Whatì, NT, Canada

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT High‐resolution mapping of permafrost in ecologically and topographically complex landscapes remains a major challenge. Existing models of permafrost extent often rely on equilibrium assumptions, which can misrepresent conditions in regions where permafrost persists largely due to ecosystem structure.
Philip P. Bonnaventure, Sophie MacLean, Nick C. Noad, Madeleine C. Garibaldi   +3 more
wiley   +1 more source

Mágreb al-Aqṣà y al -ándalus: una historia compartida de clima, hambrunas y epidemias

Arqueología y Territorio Medieval
The links between the Maghreb al-Aqṣà and al-Andalus have been a constant throughout the centuries. And if they are approached from the perspective of paleoclimatology there is no exception.
Claudia Patarnello
doaj   +1 more source

The Age and Origin of Block Deposits in the Victorian Alps, Australia

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Large periglacial block deposits are found in the mountains of southeastern Australia. Despite their widespread distribution, their mode of formation and age are poorly understood. These landforms hold considerable potential to shed light on the nature of cooling during glacial periods. In this paper we present a new study of block deposits in
Timothy T. Barrows, Michelle S. Worland, Julian Murton, Stephanie C. Mills, L. Keith Fifield   +4 more
wiley   +1 more source

Deciphering Freeze–Thaw Dynamics In Rockwalls: A Novel Approach for High Accuracy Regional‐Scale Modeling

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Using a large and novel array of instruments on five rockwalls in northern Gaspesia, their respective surface energy balances were calculated and their thermal regimes were measured and modeled to depths exceeding the seasonal frost penetration.
Tom Birien, Francis Gauthier
wiley   +1 more source

Paleo Slide Set: Coral Paleoclimatology

This slide show presents information about corals, which build carbonate skeletons over many years, forming the beautiful reefs common in tropical seas.

core  

Capturing the Multi‐Decadal Evolution of Glacier–Permafrost Interactions in a High‐Alpine Environment (Ritord, Western Swiss Alps)

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT This study investigates the multi‐decadal evolution of a glacier forefield under permafrost conditions in the Combins Massif (western Swiss Alps). A multi‐method approach based on historical and recent datasets is used to analyze its landform components.
Julie Wee, Hanne Hendrickx, Sebastián Vivero   +2 more
wiley   +1 more source