Sentences with phrase «examined ice core»

Scientists have examined ice cores dating back some 800,000 years and have documented numerous times when increases in summer insolation took place, but not all of them resulted in deglaciation to present - day ice volumes.

For example, if you examine the ice core data, say from Vostok station http://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/vostok/ you may find many episodes with «bizzare» behavior.

Examining ice cores, fossils, geologic record, etc, prove that the Earth's climate is never steady and has always been changing.

Not exact matches

The team of researchers examined the hydroclimatic and societal impacts in Egypt of a sequence of tropical and high - latitude volcanic eruptions spanning the past 2,500 years, as known from modern ice - core records.

But when Lavigne's team examined shards of volcanic glass from this volcano, they found that they didn't match the chemical composition of the glass found in polar ice cores, whereas the Samalas glass is a much closer match.

In the past decade, paleoclimatologists have reconstructed a record of climate change over the last millennium by consulting historical documents and examining indicators of temperature change like tree rings, as well as oxygen isotopes in ice cores and coral skeletons.

The study, by an international team of scientists led by the University of Cambridge, examined how changes in ocean currents in the Atlantic Ocean were related to climate conditions in the northern hemisphere during the last ice age, by examining data from ice cores and fossilised plankton shells.

Studying ice cores has provided a way to examine the biology of icy environments buried beneath kilometers of ice for millions of years.

Christner has examined microbial life in ice cores from Vostok and many other global locations.

al conducted an extensive study on the Vostok ice core data examining centennial events.

That's a fatal flaw, before we even begin to examine the use of the ice core data.

To make the link, Hastings, with Julia Jarvis and Eric Steig from the Department of Earth and Space Sciences at the University of Washington, examined at high resolution for the first time two isotopes of nitrogen found in nitrates in a Greenland ice core.

''... examine evidence of the AMO that is contained in several ice core records distributed across Greenland.

To reconstruct the past evolution of the Cosgrove Ice Shelf, Minzoni and her team examined multiple characteristics of the core sediments, including grain size and layering, carbon and nitrogen levels, and species of diatoms and foraminifera.

Specifically, we examine relationships between isotopes in precipitation and local temperatures and precipitation amounts in the principal ice coring regions (Greenland, Antarctica and the tropical Andes) and the seawater isotope - salinity gradients in the ocean.

In 1965 British climatologist Hubert Horace Lamb examined historical records of harvests and precipitation, along with early ice - core and tree - ring data, and concluded that the MWP was probably 1 — 2 °C (1.8 — 3.6 °F) warmer than early 20th - century conditions in Europe.

The team had been examining cores drilled from the Antarctic ice to «read» the pattern of temperatures of the past.

Unlike most texts that begin by explaining the most direct lives of evidence, like ice, mud, and tree cores examined by climate scientists, Cherry and Braasch start with more abstract clues.

The first examines the use of 18O: 16O ratio to date the ice cores.

Wunsh examined temperature records from several individual ice cores, and did a statistical analysis to show that very little of the temperature variation recorded could be explained by Milankovitch cycles.

The accuracy of the chronology allows us to examine the phase relationships between climate records from the ice cores and changes in insolation.

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).

Their research, published in Philosophical Transactions of the Royal Society B, examined a wide range of published data arising from satellite imagery, charcoal records in sediments and isotope - ratio records in ice cores, to build up a picture of wildfire in the recent and more distant past.

Since 2009, CORE - I (Normal Year Forcing) and CORE - II have become the standard method to evaluate global ocean / sea - ice simulations and to examine mechanisms for forced ocean climate variability.