Articles tagged with Abrupt Climate Change
Richard B. Alley has made extraordinary scientific contributions and communicated his knowledge to a broad public in a clear and compelling fashion, earning him the Stephen H. Schneider Award. The award was established this year in honor of Stephen Henry Schneider, one of the founding fathers of climatology.
A team of scientists used numerical climate models and oxygen-isotope analysis to determine what caused climate shifts during the last ice age. The study found that Heinrich events were associated with changes in monsoon rainfall intensity, rather than carbon dioxide-induced climate change.
A team of 300 scientists and students from 14 countries drilled over 1.5 miles into the North Greenland ice sheet, recovering ice from the Eemian interglacial period. The cores will provide crucial information on past temperatures and greenhouse gas concentrations, helping to predict future climate change.
The North Greenland Eemian Ice Drilling project, led by the University of Copenhagen, has reached a depth of 5,767 feet in early August, recovering over a mile of ice core. The project aims to retrieve ice from the last interglacial episode, providing valuable information on past temperatures and precipitation levels.
Researchers created a detailed 'motion picture' of Earth's last major warming event, allowing them to identify key drivers and potential consequences of abrupt climate changes. The study's results provide valuable insights into the complex interactions between ocean currents, atmospheric carbon dioxide, and subsurface heat.
Researchers found evidence of a massive 4,500-year-old drought in Africa and Asia, as well as a rapid 5,200-year-old cooling event that accelerated tropical glacier growth. The findings suggest that similar changes are currently occurring globally.
A new study finds that abrupt changes in climate may lead to shifts in monsoon patterns, resulting in lower vegetation growth, drier tropics, and increased wildfires. The research used oxygen isotopes in air from ice cores and ancient stalagmites to support these findings.
Researchers at Cardiff University found evidence of a global ocean circulation 'seesaw' that linked abrupt temperature changes in the North Atlantic to rapid cooling in the Southern Ocean, with implications for our understanding of climate change's effects on a global scale.
New research published today disproves the recent comet impact theory that triggered continent-wide wildfires in North America 12,900 years ago. The study found no evidence for large-scale fires across the continent but supports a link between global warming and increased wildfires globally.
A new US government report suggests that abrupt climate changes could occur within decades, with rapid sea level rise and severe droughts predicted. The report synthesizes the latest evidence on four specific threats for the 21st century, including melting of polar ice sheets and acceleration of seaward flow.
A new USGS report highlights the potential for abrupt climate changes in the US, including rapid sea ice loss, increased drought, and decreased ocean circulation. Further research is needed to improve understanding of these changes and develop effective adaptation strategies.
New report reveals rapid changes at Greenland and West Antarctic ice sheets, exceeding previous projections for sea level rise. Subtropical areas like the American West are likely to become more arid due to global warming, increasing the likelihood of severe droughts.
The IMPACTS program aims to understand possible mechanisms of abrupt climate change and build comprehensive computer models. Researchers focus on four types of ACC: marine ice sheet instability, positive feedback mechanisms in subarctic forests, methane hydrates destabilization, and biosphere-atmosphere feedback leading to megadroughts.
Researchers analyzed carbon dioxide levels and found a remarkable correlation with climate fluctuations over 70,000 years. The study confirms the validity of computer models projecting a warmer climate due to human activities.
Researchers analyzed Greenland ice cores to understand sudden climate changes at the end of the last ice age. The results show that climatic shifts occurred rapidly over just a few years, with dramatic changes in temperature and atmospheric circulation.
A study of a Greenland ice core has shown that two temperature spikes prior to the last ice age were tied to fundamental shifts in atmospheric circulation. The research found abrupt warming events that occurred suddenly, challenging modern societies' ability to adapt, and provided insights into the sequence of climate change
A new international study identifies vulnerable areas at risk for abrupt climate change, including the Arctic sea ice and Greenland ice sheet. The researchers warn that these 'tipping elements' may be pushed over a threshold to a radically different climate state, with catastrophic consequences.
Fedorov's work focuses on understanding abrupt climate changes, including simulations of sudden climate change and investigation into permanent El Niño-like conditions. His research has significant social importance, with potential consequences for global ecosystems and economies.
Researchers analyzed stalagmites from Borneo caves to reconstruct the tropical Pacific's climate history. Their findings suggest a more active role for the tropical Pacific in abrupt climate changes than previously thought, providing new insights into past climate trends.
Scientists at Brown University propose that an asteroid impact triggered catastrophic climate change, leading to the mass extinction of megafauna such as wooly mammoths. The theory is based on evidence of nanodiamonds and other extraterrestrial particles found in sediment samples from archeological sites.
Scientists identified two abrupt climate changes 9,000 and 8,000 years ago, with temperature drops averaging 1.6 degrees, which could inform global climate models
A study of tropical ice cores found two significant climate shifts: one around 5,000 years ago when temperatures cooled, and another more recent reversal to a warmer world. The research suggests most high-altitude glaciers in tropical regions will disappear in the near future due to rising temperatures.
Researchers found that phytoplankton communities transiently disappear and then recover during abrupt climate changes, with most species adapting to new niches. The study suggests that phytoplankton are more resilient than previously thought, with only specialized and deeper-dwelling species being unable to survive sudden changes.
Scientists have found evidence of rapid climate change in the North Atlantic, but contradicting measurements exist for the Southern Hemisphere. The new study provides detailed information on ocean surface temperature off Chile, consistent with Antarctic ice core data.
A recent study published in Science has found that tropical vegetation changes lagged local tropical climate shifts by 25 to 50 years. This contradicts previous research suggesting a high-latitude trigger for abrupt climate shifts. The researchers used sediment cores from the Cariaco Basin in Venezuela to make their findings.
A new study reveals that a slowdown in ocean circulation was directly tied to sudden and dramatic changes in climate. The research found that the Atlantic Ocean's north-south overturning circulation played a crucial role in regulating regional temperatures.
Researchers hope that ice cores and ancient plants retrieved from glaciers in the Peruvian Andes may contain clues about a mysterious global climate change that occurred over 5,000 years ago. The cores are expected to provide a critical piece of the puzzle needed to understand climate variability in the region.
Dr. Richard B. Alley, a leading expert on abrupt climate change, cautions that current models may underestimate the severity of future climate changes. He suggests policymakers should plan for contingencies to address resource scarcity and conflicts.
Dr. Richard B. Alley suggests that past climate records indicate abrupt changes, particularly near poles and away from them. He proposes a threshold-based approach to climate change, which could lead to more realistic predictions of future climate shifts.
A new study by Yale anthropologist Harvey Weiss suggests that abrupt climate changes played a significant role in past societal collapses. The research analyzed recent archaeological and paleoclimatological data to understand the impact of natural climate events on human societies.
A team of researchers led by Bradley and Yale archaeologist Harvey Weiss found that sudden climate changes were often present in societies that collapsed during the past 10,000 years. The study suggests that climate change was a major factor in the collapse of several societies around the world.
The Duke scientists analyzed past climate changes and found that the region rapidly changed with even short-term climate fluctuations, making it susceptible to drastic ecological changes. The researchers expect that global warming will significantly increase temperatures worldwide over the next century, leading to shifts in air masses ...