Results 51 to 60 of about 721 (133)

Hydroclimate variability in the eastern Kimberley, Australia, since the last deglaciation

Journal of Quaternary Science, Volume 40, Issue 5, Page 893-912, July 2025.
ABSTRACT The climate of the Kimberley region in tropical northwest Australia is dominated by the Indo‐Australian summer monsoon (IASM). Understanding of the palaeoclimate since the Last Glacial Maximum in this region, which is well placed to record IASM variations, is currently based on few records.
Teresa Dixon, Rachel Rudd, Justine Kemp, Samuel Marx, Patrick Moss, John Nikolaus Callow, Philip Anthony Hall, Quan Hua, Hamish McGowan   +8 more
wiley   +1 more source

Determination of 210Po levels and annual committed effective dose in crustaceans from an oil-contaminated Mangrove Ecosystem in Niger Delta, Nigeria

Discover Environment
This study examined the levels of 210Po and the annual effective dose in edible crustaceans from the Santa Barbara River, Nembe. The crustaceans analyzed included Crab (Cardisoma crassum), Prawn (Macrobrachium rosenbergii), Shrimp (Penaeus notalis), and ...
Victor Ighariemu, Matthew Owhonda Wegwu, Lawrence Chijoke Chuku, Oghenerukevwe Obadesagbo   +3 more
doaj   +1 more source

Study on Preparation of Metal Bismuth Targets

Journal of Isotopes, 2021
High temperature chemical extract method can be used to separate 209Bi and 210Po in bismuth target after reactor irradiated. Two kinds of metal bismuth targets are designed. The MNCP program is used to simulate the neutron flux and nuclear heating in the
YANG Hongwei;XIANG Xueqin;HU Liansheng;MA Junping;LIU Lu
doaj  

Particle Export Fluxes in the Southern Ocean: Importance of Nonheterotrophic Processes in POC Flux Attenuation

Journal of Geophysical Research: Oceans, Volume 130, Issue 7, July 2025.
Abstract The ocean contributes to regulating atmospheric CO2 levels via the biological carbon pump (BCP). One critical aspect of the BCP is the depth at which sinking particulate organic carbon (POC) remineralizes in the mesopelagic zone (200–1,000 m). In the Southern Ocean, the circulation is such that the products generated from POC remineralization ...
Frédéric A. C. Le Moigne, Katsiaryna Pabortsava, María Villa‐Alfageme, Nathan Briggs, Chelsey A. Baker, Heather A. Bouman, Chance J. English, Sabena Blackbird, Stephanie A. Henson, Hugh Venables, Craig A. Carlson, C. Mark Moore, Jack Williams, Adrian P. Martin   +13 more
wiley   +1 more source

Preparation of Standard Plane Source of 210Po

Journal of Isotopes, 2021
A method of spontaneous deposition of 210Po on a silver disc was used to prepare the standard plane source in a 210Pb solution. The prepared source was measured by an alpha spectrometer.
ZHU Heng;CHEN Xilin;ZHU Baoji;DIAO Lijun;YAO Shunhe;XIN Yu;GUO Xiaoqing;YAO Yanling;LYU Xiaoxia
doaj  

Nitrogen Processes Within Tropical Mangroves in Australia

Journal of Geophysical Research: Biogeosciences, Volume 130, Issue 4, April 2025.
Abstract Coastal wetlands have long been identified as ecosystems that can ameliorate N inputs into the ocean. The processes associated with N uptake, transformation, and losses are relatively well understood for temperate wetlands; however, information on tropical wetlands is scarce.
M. F. Adame, N. Iram, J. N. Gamboa‐Cutz, P. Masque   +3 more
wiley   +1 more source

A record of monsoon rainforest variability from the Kimberley region in northwestern Australia

Journal of Quaternary Science, Volume 40, Issue 2, Page 243-256, February 2025.
ABSTRACT Northern Australia experiences extreme seasonality via the Indo‐Australian summer monsoon, with high inter‐annual variability in hydroclimate. Understanding the influence of hydrological variability on the landscape through the period of human occupation provides important environmental context to support the interpretation of the rich ...
Rachel C. Rudd, Teresa Dixon, John Nikolaus Callow, Patricia S. Gadd, Sabika Maizma, Geraldine Jacobsen, Patrick Moss, Hamish McGowan   +7 more
wiley   +1 more source

Estimation of 210Po and 210Pb and its doses to human beings due to consumption of freshwater species of Ponnusamuthiram Lake, South India

Radiation Protection and Environment
A systemic study on the natural radionuclides such as 210Po and 210Pb in the environmental matrices and biota of Ponnusamuthiram Lake (Kumarapalayam) has been undertaken to establish a baseline data on the radiation profile of Ponnusamuthiram Lake ...
Raju Krishnamoorthy, T. Perumal, N. Kannadasan, Mohamed Saiyad Musthafa   +3 more
doaj   +1 more source

Holocene Lake Sediments Reveal Alluvial Fan History With Links to Climate, Wildfire, and Earthquakes

Journal of Geophysical Research: Earth Surface, Volume 129, Issue 11, November 2024.
Abstract Flood hazards along alluvial rivers vary over time due to changes in both flow regime and channel morphology; however, their millennial‐scale histories are difficult to study from incomplete and poorly dated alluvial stratigraphies. Thus, the role of external forcings (e.g., climate) in the magnitude of alluvial channel dynamics remains poorly
Daniel G. Gavin, William T. Struble, Mark A. Fonstad   +2 more
wiley   +1 more source

Limited Organic Carbon Burial by the Rusty Carbon Sink in Swedish Fjord Sediments

Journal of Geophysical Research: Biogeosciences, Volume 129, Issue 11, November 2024.
Abstract Marine sediments bury ∼160 Tg of organic carbon (OC) annually and represent an essential component of the global carbon cycle. OC burial is inherently multifactorial; however, in the past decade, the role of iron in regulating OC burial via the formation of organo‐mineral associations, known as “rusty carbon sink,” has been extensively studied.
S. Placitu, S. J. van de Velde, A. Hylén, P. O. J. Hall, E. K. Robertson, M. Eriksson, M. Leermakers, N. Mehta, S. Bonneville   +8 more
wiley   +1 more source