Articles tagged with Organic Geochemistry
Scientists propose a colossal cliff across ancient North America may have exposed Grand Canyon's oldest rocks nearly a billion years before it was carved by the Colorado River. The study suggests the 'great escarpment' of steep rocky cliffs formed when the supercontinent Rodinia broke apart 800 million years ago.
Researchers have discovered that microorganisms actively contribute to mineral formation on the ocean floor, using compounds such as sulfate and sulfur to promote pyrite formation. The study reveals a complex interplay between biological and geological processes at the ocean floor.
A global review of 411 studies found that river sand and gravel mining is removing sand faster than it can be replenished, threatening rivers, infrastructure, and communities. The study recommends better tracking, measurement, and regulation to manage extraction and protect the environment.
False-negative results may lead to overlooking environments that could harbor life beyond current detection capabilities. Researchers emphasize the need for targeted research strategies, combining laboratory experiments with modeling research and fieldwork to address these risks.
A new study reveals how responsive Greenland's ice sheet is to climate change, with widespread methane release linked to an episode of warming around 4,000 years ago. The findings highlight the role of recent ice margin fluctuations on subglacial carbon cycling, with implications for global methane budget assessments.
A new approach detects subtle chemical signatures in seawater, revealing dynamic nitrogen cycling in low-oxygen regions. This discovery sheds light on microbial communities controlling ocean productivity and the global carbon cycle.
A new method reconstructs carbon dioxide levels and photosynthesis from fossilized tooth enamel, shedding light on the climate of the Mesozoic era. The analysis found that atmospheric CO2 levels were four times higher in the late Jurassic period and three times higher in the late Cretaceous period than they are today.
Dr. Ilya Bobrovskiy's research aims to improve understanding of ancient habitats' carbon cycles, tracking coevolution of life and environments. He will analyze rocks using organic geochemistry, isotope geochemistry, and paleontology.
A study found that sediment resuspension triggered by trawling and natural processes releases significant amounts of CO2 into the atmosphere through pyrite oxidation. The research reveals that protecting sensitive seafloor areas with fine-grained sediments is crucial to maintain the region's carbon sink capacity.
A new study on natural oil seeps in the deep sea has found that hydrothermal processes mobilize dissolved organic matter, influencing local ecosystems and the global marine carbon cycle. The composition of released water-soluble organic molecules is strongly influenced by temperature and petroleum composition.
Combustion-related isoprene emissions from outdoor biomass burning and residential fuel use contribute substantially to the formation of wintertime secondary organic aerosols. The study found that combustion-derived isoprene accounts for 25-40% of winter SOA in northern regions.
The Eastern Tropical Pacific's Oxygen Deficient Zone (ODZ) expands and contracts every ten years, driven by Pacific decadal climate variability. This dynamic process has important consequences for marine ecosystems, as ODZs could respond quickly to climate changes.
A team of researchers discovered that a 'tag-team' between the oceans and continents led to severe environmental crises, causing mass extinctions of marine species. The study found that chemical weathering pulses disrupted the oceans, leading to anoxic events that had profound impacts on marine ecosystems.
Researchers from Curtin University analyze polycyclic aromatic hydrocarbons extracted from Ryugu and Murchison meteorites, revealing that certain PAHs likely formed in the cold areas of space between stars. This discovery offers valuable insights into the history and chemistry of celestial bodies like asteroids and meteorites.
Scientists have discovered a simple test for signs of past or present life on other planets, using artificial intelligence to distinguish between biological and abiotic samples with high accuracy. The method has the potential to revolutionize the search for extraterrestrial life and deepen our understanding of Earth's earliest life.
A team of researchers has determined that microplastic particles are present in the marine atmosphere, even in remote parts of the world. The study found that different types of plastics, including polyester and polyethylene terephthalate, were detected in air samples collected from various sites along the Norwegian coast.
A research team uncovered a specific kill mechanism responsible for several biotic disruptions during the late Devonian Period. The discovery linked sea level changes, climate fluctuations, and ocean chemistry to mass extinctions, with implications for today's oceans affected by global warming.
Researchers study the sea-surface microlayer, a biogeochemical reactor where organisms adapt to harsh conditions like UV radiation and fluctuating temperatures. The team aims to understand biological, chemical, and physical interactions in this thin layer, influencing global climate.
Jaap Sinninghe Damsté is awarded the Treibs medal for his research into marine sediments and the discovery of anammox bacteria, which has major consequences for the nitrogen cycle. He uses organic molecules to reconstruct life and climate in previous epochs.