Sentences with phrase «ocean core records»

Not exact matches

Now, using two deep cores collected at two Ocean Drilling Program sites in the Southern Ocean, Jaccard and colleagues have reconstructed ocean records of productivity and vertical overturning reaching back a million years, through multiple glacial - interglacial cyOcean Drilling Program sites in the Southern Ocean, Jaccard and colleagues have reconstructed ocean records of productivity and vertical overturning reaching back a million years, through multiple glacial - interglacial cyOcean, Jaccard and colleagues have reconstructed ocean records of productivity and vertical overturning reaching back a million years, through multiple glacial - interglacial cyocean records of productivity and vertical overturning reaching back a million years, through multiple glacial - interglacial cycles.

Not even a massive outpouring of carbon 56 million years ago (recorded in this ocean sediment core as the 25 - centimeter - long red band) comes close, a new study suggests.

Christina Ravelo led IODP Expedition 323 to the Bering Sea in 2009 and collected sediment cores that preserve records of regional climate and ocean circulation covering the past 1.2 million years.

High - resolution ocean sediment cores can sometimes be found that fit this, as can some cave (speleothem) records and pollen records etc..

Paleoclimate: I don't know for sure, but this record is too long (1 million years) to be an ice core, so I'm guessing it's a stacked sediment core, showing delta - O18 from ocean foraminifera.

Bi-polar ocean linkages: evidence from late Holocene Antarctic marine and Greenland ice - core records.

There are also a number of paleoclimatic recorders of oxygen isotopes, including lake / ocean records, speleothems (in caves), corals, ice cores, etc..

So the ocean will be much more acidified than occured naturally within the ice core record (now 800 kyr).

In my briefings to the Association of Small Island States in Bali, the 41 Island Nations of the Caribbean, Pacific, and Indian Ocean (and later circulated to all member states), I pointed out that IPCC had seriously and systematically UNDERESTIMATED the extent of climate change, showing that the sensitivity of temperature and sea level to CO2 clearly shown by the past climate record in coral reefs, ice cores, and deep sea sediments is orders of magnitude higher than IPCC's models.

Now the locations of avaialble proxy data (tree rings, ice cores, ocean sediment records, corals etc.) are not necessarily optimally spread out, but the spatial sampling error is actually quite easy to calculate, and goes into the error bars shown on most reconstructions.

You may now understand why global temperature, i.e. ocean heat content, shows such a strong correlation with atmospheric CO2 over the last 800,000 years — as shown in the ice core records.

There are also a number of paleoclimatic recorders of oxygen isotopes, including lake / ocean records, speleothems (in caves), corals, ice cores, etc..

Past climates have left records in ice and ocean - sediment cores that provide some of the best available evidence.1 A couple of kilometres beneath the surface of the Antarctic and Greenland ice - sheets lies ice which has been there for tens of thousands of years.

Neither such a large increase or decrease, nor a recovery in less than a decade is seen in the d13C record: less than 0.1 per mil decrease in atmosphere (ice cores) and upper oceans (sponges) 1935 - 1950.

This retreat immediately followed a period of maximum Holocene warmth that is recorded in some ice cores and occurred at the same time as an influx of warmer ocean water onto the Antarctic Peninsula shelf.

A strong correlation between the ocean core temps and the instrument record would normally strengthen the reliability of the historical reconstruction.

The dD record is directly related to the temperature of most of the SH oceans, where the pecipitation of the Vostok ice core originated.

Proxy records of sea level are preserved in a variety of marine and terrestrial settings, such as sediments and organisms in deep ocean cores or once - submerged shorelines, and uplifted fossil reefs.

Large changes in climate are recorded in ice cores, ocean mud and over the last two centuries, instrumental records.

The ubiquitous character of certain events further confirms their importance: «the Younger Dryas and a large number of abrupt changes during the last ice age called Dansgaard / Oeschger events (23 abrupt changes into a climate of near - modern warmth and out again, during the last glacial period) have been corroborated in multiple ice cores from Greenland, Antarctica and tropical mountains, marine sediments from the North Atlantic Ocean, the tropical Atlantic, eastern Pacific, and Indian Oceans, and from various records on land.

Temperature has gone up and down but it is difficult to measure precisely with the proxy records of ice cores the Anarctic and Greenland and sediment cores in the ocean.

Even if a location in Antarctica stayed exactly the same temperature for 100,000 years, the ice core at that location would tell the temperature record of the ocean that evaporated the water that fell as snow at that location.

It clearly shows CO2 following the temperature, due to the effect of the oceans but, as far as I'm aware, the ice core records show not a single instance of temperature following changes in CO2.

Examinations of paleoclimate temperatures and other variables recorded in both North Atlantic ocean sediments and Greenland ice cores (e.g., Lehman and Keigwin, 1992; Alley et al., 1993; Taylor et al., 1993) have led to suggestions that the AMOC

Proxy records of climate, like those derived from ice cores and ocean sediment cores, track the big - picture changes well but can't provide the same level of local detail we have for the past century.

Composed of 450 instrumental records from temperature stations sheltered from ocean - air / urbanization / adjustment biases throughout the world, a new 20th / 21st century global temperature record introduced previously here very closely aligns with paleoclimate evidence from tree rings, ice cores, fossil pollen and other temperature proxies.

Based on the paleoclimate record from ice and ocean cores, the last warm period in the Arctic peaked about 8,000 years ago, during the so - called Holocene Thermal Maximum.

Comprised of 450 instrumental records from temperature stations sheltered from ocean - air / urbanization / adjustment biases throughout the world, a new 20th / 21st century global temperature record introduced previously here very closely aligns with paleoclimate evidence from tree rings, ice cores, fossil pollen and other temperature proxies.

Quantities such as tree ring widths, coral growth, isotope variations in ice cores, ocean and lake sediments, cave deposits, fossils, ice cores, borehole temperatures, and glacier length records are correlated with climatic fluctuations.

The researchers first matched this fossil record secured by the Integrated Ocean Drilling Program Expedition in the western tropical Pacific to existing records from bubbles trapped in Antarctic ice cores that stretch back 800,000 years, which preserve a precise record of past atmospheric composition.

Paleoclimate: I don't know for sure, but this record is too long (1 million years) to be an ice core, so I'm guessing it's a stacked sediment core, showing delta - O18 from ocean foraminifera.

In the past decade, scientists have documented similar dust peaks in polar ice cores, and in sediments from the Atlantic and Indian oceans, but records from Pacific were contradictory.