Sentences with phrase «plant leaf wax»

By examining plant leaf wax remnants in sediment core samples taken from beneath the Ross Ice Shelf, the research team found summer temperatures along the Antarctic coast 15 to 20 million years ago were 20 degrees Fahrenheit (11 degrees Celsius) warmer than today, with temperatures reaching as high as 45 degrees Fahrenheit (7 degrees Celsius).

The findings are based on analyses of ancient plant leaf wax found in the sediments of the Gulf of Guinea in combination with computer models of the climate system.

These findings are based on the isotopic composition of plant leaf waxes in marine sediments.

Not exact matches

She uses this knowledge of plants, and specifically their leaf waxes, to document past changes in plant life and rainfall patterns, including studies on the expansion of grasslands in Africa and the revegetation of Antarctica during a prior warming event.

By analyzing the leaf wax from ancient marine sediments, the team determined the region's past rainfall patterns and also gathered clues about what types of plants were growing.

They measured the amounts of carbon isotopes in plant - leaf wax found in the sediments and from that determined what types of plants had lived in the two areas during the past 27,000 years.

Brown researchers have compiled a detailed Indonesian climate record of the last 60,000 years, tracking telltale indicators in sedimentary cores: titanium levels (a marker for surface water runoff) and the carbon isotopes of leaf wax, a marker for plant varieties (grasses indicate dry conditions).

Different plants have different carbon isotopes in their leaf wax.

Because plants alter the chemical composition of the wax on their leaves depending on how dry or wet the climate is, the leaf wax from the sediment core's layers provides a record of past fluctuations in rainfall.

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Materials: organic aloe leaf juice, organic coconut oil, organic alcohol, emulsifying wax (plant - derived), vegetable glycerin,...

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With wax - covered leaves that trap pollutants, the Tulip Tree has been planted worldwide for its anti-pollution effect.

An analysis of the leaf wax provided a record of the water taken up by the plants when they lived.

Within the sediment, they found plant - leaf wax, an indication of ancient vegetation.