scholarly journals Geochronological implications of 210Pb and 137Cs mobility in cave guano deposits

2021 ◽  
Vol 50 (3) ◽  
pp. 239-248
Author(s):  
Donald A. McFarlane ◽  
Joyce Lundberg
Keyword(s):  
Radiocarbon Age ◽  
Environmental Interpretation ◽  
210Pb And 137Cs ◽  
Laboratory Evidence ◽  
Bat Guano

Some recent publications on the paleo- and historical environmental interpretation of bat guano sequences have relied on 210Pb and 137Cs distribution to establish age-depth models, even when these are at odds with radiocarbon models in the lower parts of the sequence. Here, we present both field and laboratory evidence for the unpredictable mobility of lead and cesium in decomposing bat guano deposits. We suggest that 210Pb- and 137Cs-based chronologies of bat guano deposits should only be used when independently supported, for example, by a robust radiocarbon age-depth model.

Radiocarbon Age Dating of 1,000-Year-Old Pearls from the Cirebon Shipwreck (Java, Indonesia)

2017 ◽  
Vol 35 (8) ◽  
pp. 728-736 ◽  
Author(s):  
Michael S. Krzemnicki ◽  
Laurent E. Cartier ◽  
Irka Hajdas
Keyword(s):  
Age Dating ◽  
Radiocarbon Age

Late Quaternary sedimentological and climate changes at Lake Bosumtwi Ghana: New constraints from laminae analysis and radiocarbon age modeling

2012 ◽  
Vol 361-362 ◽  
pp. 49-60 ◽  
Author(s):  
Timothy M. Shanahan ◽  
J. Warren Beck ◽  
Jonathan T. Overpeck ◽  
Nicholas P. McKay ◽  
Jeffrey S. Pigati ◽  
...  
Keyword(s):  
Climate Changes ◽  
Late Quaternary ◽  
Radiocarbon Age

scholarly journals How Does Environmental Interpretation Affect Psychological Well-Being? A Study Conducted in the Context of COVID-19

2021 ◽  
Vol 13 (15) ◽  
pp. 8522
Author(s):  
Hoang Viet Nguyen ◽  
Wilson Dang ◽  
Hoang Nguyen ◽  
Thi Nguyen Hong Nguyen ◽  
Thi My Nguyet Nguyen ◽  
...  
Keyword(s):  
Psychological Contract ◽  
Environmental Policies ◽  
Well Being ◽  
Psychological Well Being ◽  
Environmentally Responsible Behavior ◽  
Environmental Interpretation ◽  
Psychological Contract Violation ◽  
Responsible Behavior ◽  
Environmentally Responsible

The COVID-19 crisis has challenged and generated severe impact on the global society, economy, and environment. Under this pandemic context, governments and organizations around the world have issued and strengthened environmental policies and regulations to protect the environment and human health. However, the extant knowledge about how people’s interpretation of environmental policies and regulations influence their psychological well-being in the context of the COVID-19 pandemic is still limited. This study, therefore, investigates the impact of environmental interpretation on psychological well-being with the mediating role of environmentally responsible behavior and the moderating role of psychological contract violation. Using the data from a large sample of 960 residents in China, results of structural equation modeling show a positive relationship between environmental interpretation and psychological well-being, and this relationship is mediated by environmentally responsible behavior. Notably, psychological contract violation has a moderating effect on the indirect effect of environmental interpretation on psychological well-being via environmentally responsible behavior. These findings have several important implications for policymakers in environmental sustainability and pandemic planning.

scholarly journals A NEW RAMPED PYROXIDATION/COMBUSTION FACILITY AT 14CHRONO, BELFAST: SETUP DESCRIPTION AND INITIAL RESULTS

Radiocarbon ◽  
2021 ◽  
pp. 1-14
Author(s):  
Evelyn M Keaveney ◽  
Gerard T Barrett ◽  
Kerry Allen ◽  
Paula J Reimer
Keyword(s):  
Bulk Material ◽  
Correction Method ◽  
Source Attribution ◽  
Radiocarbon Age ◽  
Targeted Analysis ◽  
Consensus Values ◽  
Background Material ◽  
Initial Results ◽  
Blank Correction ◽  
Good Agreement

ABSTRACT The Belfast Ramped Pyroxidation/Combustion (RPO/RC) facility was established at the 14CHRONO Centre (Queen’s University Belfast). The facility was created to provide targeted analysis of bulk material for refined chronological analysis and carbon source attribution for a range of sample types. Here we report initial RPO results, principally on background material, but also including secondary standards that are routinely analyzed at 14CHRONO. A description of our setup, methodology, and background (blank) correction method for the system are provided. The backgrounds (anthracite, spar calcite, Pargas marble) reported by the system are in excess of 35,000 14C years BP with a mean age of 39,345 14C years BP (1σ = 36,497–43,800 years BP, N=44) with F14C = 0.0075 ± 0.0032. Initial results for standards are also in good agreement with consensus values: TIRI-B pine radiocarbon age = 4482 ± 47 years BP (N=13, consensus = 4508 years BP); IAEA-C6 ANU Sucrose F14C= 1.5036 ± 0.0034 (N=10, consensus F14C = 1.503). These initial tests have allowed problematic issues to be identified and improvements made for future analyses.

scholarly journals New glacier evidence for ice-free summits during the life of the Tyrolean Iceman

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Pascal Bohleber ◽  
Margit Schwikowski ◽  
Martin Stocker-Waldhuber ◽  
Ling Fang ◽  
Andrea Fischer
Keyword(s):  
Elevation Gradient ◽  
Ice Age ◽  
Detailed Knowledge ◽  
New Approach ◽  
Radiocarbon Age ◽  
Alpine Glaciers ◽  
The Alps ◽  
Tyrolean Iceman ◽  
High Elevations ◽  
Age Constraints

AbstractDetailed knowledge of Holocene climate and glaciers dynamics is essential for sustainable development in warming mountain regions. Yet information about Holocene glacier coverage in the Alps before the Little Ice Age stems mostly from studying advances of glacier tongues at lower elevations. Here we present a new approach to reconstructing past glacier low stands and ice-free conditions by assessing and dating the oldest ice preserved at high elevations. A previously unexplored ice dome at Weißseespitze summit (3500 m), near where the “Tyrolean Iceman” was found, offers almost ideal conditions for preserving the original ice formed at the site. The glaciological settings and state-of-the-art micro-radiocarbon age constraints indicate that the summit has been glaciated for about 5900 years. In combination with known maximum ages of other high Alpine glaciers, we present evidence for an elevation gradient of neoglaciation onset. It reveals that in the Alps only the highest elevation sites remained ice-covered throughout the Holocene. Just before the life of the Iceman, high Alpine summits were emerging from nearly ice-free conditions, during the start of a Mid-Holocene neoglaciation. We demonstrate that, under specific circumstances, the old ice at the base of high Alpine glaciers is a sensitive archive of glacier change. However, under current melt rates the archive at Weißseespitze and at similar locations will be lost within the next two decades.

Environmental Interpretation for a Diverse Public: Nature Center Planning for Minority Populations

1997 ◽  
Vol 2 (1) ◽  
pp. 27-46 ◽  
Author(s):  
Susan K. Jacohson ◽  
John J. Arana ◽  
Mallory D. McDuff
Keyword(s):  
Ethnic Diversity ◽  
The United States ◽  
Educational Facilities ◽  
Community Based ◽  
Human Environment ◽  
Environmental Interpretation ◽  
School Programs ◽  
Nature Awareness ◽  
The One

The increasing cultural and ethnic diversity in the United States should challenge environmental interpreters to offer programs that attract a variety of audiences. This study investigated minority involvement at Florida's nature centers through a census of 77 nature center directors throughout Florida as well as a survey of 21 minority staff working at these educational facilities. School programs at the nature centers are the primary method for reaching minorities; few programs involve minority adults from the community. The focus of the one-day visits for students is primarily nature awareness, with little emphasis on influencing knowledge or attitudes about local issues, human-environment relationships, or actions to reduce environmental problems. The results indicate the need for nature centers to expand their programs to offer long-term, community-based environmental interpretation for a diverse public.

Sign in / Sign up

Export Citation Format

Share Document