Sentences with phrase «in ancient climate change»

Not exact matches

«Climate change and drought in ancient times.»

Yearly flooding along the lower Nile (green swath, above) was critically important for agriculture in ancient Egypt, but a new study suggests climate - changing volcanic eruptions occasionally stifled floods.

Lead author William Taylor, a postdoctoral research fellow at the Max Planck Institute for the Science of Human History, says that this model «enables us for the first time to link horse use with other important cultural developments in ancient Mongolia and eastern Eurasia, and evaluate the role of climate and environmental change in the local origins of horse riding.»

But one thing hasn't changed: She's still studying climate, only this time through the lens of anthropology, looking at how climate shifts of the past influenced politics in ancient Mayan civilizations.

Researchers can crack open stalagmites to uncover ancient earthquakes and changes in cave climate.

«Mammal body - size responds to climate change in ancient Wyoming.»

In Earth's ancient atmosphere, scientists see the faint outlines of a carbon dioxide (CO2) roller coaster, climbing and dipping across deep time in repeated bouts of climate changIn Earth's ancient atmosphere, scientists see the faint outlines of a carbon dioxide (CO2) roller coaster, climbing and dipping across deep time in repeated bouts of climate changin repeated bouts of climate change.

MEACHEM: We would really love to discover some more mammal fossils down there and what we're really hoping to get out of these mammal fossils is some good ancient DNA, that will tell us about the conditions that these animals lived in and how DNA or genes changed with climate.

«When these ancient practices are no longer reliable, that in itself is an early indication of climate change.»

Archaeologists, who studied ancient tools, ornaments, and human remains in the prehistoric rock shelter Riparo Bombrini, discovered how early homo sapiens survived a climate - changing supervolcano eruption This discovery offered clues how humans can survive climate change.

A new study published in Scientific Reports finds that bandicoots are not only more ancient than anyone thought, they're probably no strangers to the pressures and shifts brought on by climate change.

He explains how he once thought that climate change theory was based solely on computer models, where in fact it's based on scientific measurements of both modern and ancient climates.

Beetles gained similar strength in the Rockies during mild winters in the late»90s and early 2000s, killing not only their usual victims but also entire hillsides of ancient whitebark pines, which live at altitudes once too frigid to support the insects.A beautifully concise explanation of what has happened in a large portion of the West, thanks in part to climate change.

Thus, this is why people are motivated to look at ancient climates where there are times of much larger temperature changes and forcing signals, that we can hopefully relate to each other to interrogate the sensitivity problem in a more robust fashion.

Ongoing projects examine the paleoenvironmental context for human evolution and cultural development, reconstructing ancient rivers and lakes, dating geological formations, and attempting to understand the role that climate change had in producing new species and stone - tool cultures.

«BEYOND THE YOUNGER DRYAS Collapse as Adaptation to Abrupt Climate Change in Ancient West Asia and the Eastern Mediterranean Harvey Weiss

Their findings have stirred a lot of skepticism in the community of specialists examining ancient records of past climate changes and how they might relate to variations in Earth's orbit and orientation toward the Sun and other factors.

Answer: While there are poorly understood ancient climates and controversial climate changes in earth's long geological history, there are no clear contradictions to greenhouse theory to be found.

Posted in Advocacy, Climatic Changes in Himalayas, Disaster and Emergency, Disasters and Climate Change, Ecosystem Functions, Flood, Governance, Government Policies, Migration, News, Population Comments Off on Ancient Waterways Bend To Climate Change

An ancient lake whose shores vacillated between lush forests and dry savannahs shows how the changing climate may have shaped humanity's dawn in eastern Africa, according to new research.

The identified atmospheric feedbacks including changes in planetary albedo, in water vapour distribution and in meridional latent heat transport are all poorly represented in zonal energy balance model as the one used in [7] whereas they appear to be of primary importance when focusing on ancient greenhouse climates.

12, 1987) The Ocean in Human Affairs (Paragon House, 1989) The Universe and Its Origin: From Ancient Myths to Present Reality and Future Fantasy (Paragon House, 1990) Global Climate Change: Human and Natural Influences (Paragon House, 1989) The Greenhouse Debate Continued (ICS Press, 1992) The Scientific Case Against the Global Climate Treaty (SEPP, 1997) Hot Talk, Cold Science: Global Warming's Unfinished Debate, (The Independent Institute, 1997)

Although the Middle East is not currently rebounding from an ice age, the scientists say those ancient rebounds have things in common with the way the climate is changing today: Rainfall is decreasing and higher temperatures are causing more evaporation that is drying up the land.

For some contrasts between the Younger Dryas and the most serious droughts since then at 8200, 5200, and 4200 years ago, see Fagan (1999) and Harvey Weiss, «Beyond the Younger Dryas: Collapse as adaptation to abrupt climate change in ancient West Asia and the Eastern Mediterranean,» pp. 75 - 98 in Confronting Natural Disaster: Engaging the Past to Understand the Future, G. Bawden and R. Reycraft, editors (University of New Mexico Press 2000), at http://www.yale.edu/nelc/weiss/byd.html.

In a similar vein, the ancient Norse — drawing, perhaps, on some racial memory of climate change in the prehistoric past — insisted in their eschatology that the end of the world (Ragnarok, marked by warring among gods and men and great natural disasters) would be preceded by three great winters or «fimbulwinters.&raquIn a similar vein, the ancient Norse — drawing, perhaps, on some racial memory of climate change in the prehistoric past — insisted in their eschatology that the end of the world (Ragnarok, marked by warring among gods and men and great natural disasters) would be preceded by three great winters or «fimbulwinters.&raquin the prehistoric past — insisted in their eschatology that the end of the world (Ragnarok, marked by warring among gods and men and great natural disasters) would be preceded by three great winters or «fimbulwinters.&raquin their eschatology that the end of the world (Ragnarok, marked by warring among gods and men and great natural disasters) would be preceded by three great winters or «fimbulwinters.»

By Barry Brown Canadian researchers studying the ArcticÂ's ancient permafrost have discovered 700,000 - year - old ice wedges buried in the soil that have survived earlier periods of global warming, adding complexity to predictions about the impact of contemporary climate change.

«God's Bathtub:» Ancient Lake In Australia Found To Be Unaffected By Climate Change (PHOTO) Where the world's greenhouse gases come from.

Unfortunately, they conveniently ignore (or are unaware) the empirical evidence that climate change is a constant, which has produced ancient and geological era extremes in weather and temperatures - extremes that science has confirmed with a cornucopia of peer - reviewed research.

As the vast majority of climate peer - reviewed studies confirm, there were multiple periods in the geological and ancient past that exhibited, not only extreme climate change, but also hotter temperatures prior to the modern era's huge industrial / consumer greenhouse gases.

1950s: Research on military applications of radar and infrared radiation promotes advances in radiative transfer theory and measurements = > Radiation math — Studies conducted largely for military applications give accurate values of infrared absorption by gases = > CO2 greenhouse — Nuclear physicists and chemists develop Carbon - 14 analysis, useful for dating ancient climate changes = > Carbon dates, for detecting carbon from fossil fuels in the atmosphere, and for measuring the rate of ocean turnover = > CO2 greenhouse — Development of digital computers affects many fields including the calculation of radiation transfer in the atmosphere = > Radiation math, and makes it possible to model weather processes = > Models (GCMs)-- Geological studies of polar wandering help provoke Ewing - Donn model of ice ages = > Simple models — Improvements in infrared instrumentation (mainly for industrial processes) allow very precise measurements of atmospheric CO2 = > CO2 greenhouse.

Ancient stone carvings in modern - day Turkey appear to depict a comet strike that caused a period of climate change.

Tree rings and fire scars in ancient pines, giant sequoias and bigcone Douglas - fir trees reveal long - term patterns and causes of changes in fire regimes in those forests, including the roles of people and climate variations.