Sentences with phrase «ancient climates showed»

To the surprise of many, studies of ancient climates showed that astronomical cycles had partly set the timing of the ice ages.

To the surprise of many, studies of ancient climates showed that astronomical cycles had partly set the timing of the ice ages.

Not exact matches

This shows that the expansion of grasslands isn't solely due to drought, but more complex climate factors are at work, both for modern Africans now and ancient Africans in the Pleistocene.

Using an interdisciplinary approach that combined evidence from climate modelling of large 20th - century eruptions, annual measurements of Nile summer flood heights from the Islamic Nilometer — the longest - known human record of environmental variability — between 622 and 1902, as well as descriptions of Nile flood quality in ancient papyri and inscriptions from the Ptolemaic era, the authors show how large volcanic eruptions impacted on Nile river flow, reducing the height of the agriculturally - critical summer flood.

A new study linking paleoclimatology — the reconstruction of past global climates — with historical analysis by researchers at Yale and other institutions shows a link between environmental stress and its impact on the economy, political stability, and war - fighting capacity of ancient Egypt.

Molecular signatures in ancient rocks show the microorganisms may have existed on Earth around 3.5 billion years ago, producing some of the greenhouse gases needed to stabilise the early Earth's climate.

A land - ocean pattern like that above was used in a climate model to show how storm clouds could have shielded ancient Venus from strong sunlight and made the planet habitable.

This study therefore shows that climate warming is not the only explanation of global ecological disasters in the past on Earth: it is important to continue analysing ancient marine sediments to gain a deeper understanding of the earth's climate system.

Scientific analysis of past climates shows that greenhouse gasses, principally CO2, have controlled most ancient climate changes.

Although the Cretaceous, 145 to 66 million years ago, was a period known for its extreme greenhouse climate, a new study shows that this ancient warming was interrupted with a significant cold snap.

Information packs include facts about the country, its location, geography, modern history, ancient history, climate, general information, famous people and inventions etc Display • Photo packs for each country • Country names flashcards, key word flashcards, food flashcards, population statistics poster, A4 flags Maps and Activities • Maps of each country, Scandinavia, the Arctic circle, Europe, the world, continents, map jigsaw, maps to colour, matching cards, flag activities, Language (As Swedish is the most common language spoken across Scandinavia resources are included in this languages) • Number flashcards from 1 - 20 in Swedish • Days of the week in English and Swedish flashcards • Months of the year flashcards in English and Swedish • Common phrases cards — in English and Swedish • Colour flashcards in Swedish • A4 speech bubbles showing «hello» in each Scandinavian language Activities • Themed writing paper with flags to frame pupils work • Writing activities, drawing activities, make a presentation, research note pad, place mat, reward chart, word search, quiz, etc Borders, Banners and Buntings • Extra large lettering spelling «SCANDINAVIA» • Long banners for each country name, buntings with names • patterned and plain display borders and packing paper if needed

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 announcement comes as research published by the National Academies shows that extreme heat waves can be attributed with near - certainty to climate change; a NOAA study links global warming to toxic algae blooms; and paleoclimatic research shows that Antarctic glaciers fluctuated with ancient CO2 levels, raising sea level tens of meters when CO2 levels were just 500 ppm.

The results also show these ancient lakes actually have a net cooling effect on climate over thousands of years.

Studying ice cores shows how ancient ice contains records of Earth's past climate.

1966 Emiliani's analysis of deep - sea cores and Broecker's analysis of ancient corals show that the timing of ice ages was set by small orbital shifts, suggesting that the climate system is sensitive to small changes.