Sentences with phrase «resolution ice core records»

The current rate of CO2 rise in atmospheric concentrations is unprecedented with respect to the highest resolution ice core records which cover the last 22,000 years.
McConnell, J.R., Maselli, O.J., Sigl, M., Vallelonga, P., Neumann, T., Anschutz, H., Bales, R.C., Curran, M.A.J., Das, S.B., Edwards, R., Kipfstuhl, S., Layman, L. and Thomas, E.R., 2014, Antarctic - wide array of high - resolution ice core records reveals pervasive lead pollution began in 1889 and persists today.
Changes in black carbon deposition to Antarctica from two high - resolution ice core records, 1850 - 2000 AD.

Not exact matches

Utilizing the high resolution of the measurements, the team was able to detect methane fingerprints from the Southern Hemisphere that don't match temperature records from Greenland ice cores.
High - Resolution Accumulation and Aerosol Records during the Past 2000 Years from an East Antarctic Ice Core Array.
An ultra-high resolution continuous record of methane variations during the last glacial - interglacial transition from the WAIS Divide ice core.
Atmospheric CO2 over the last 1000 years: A high - resolution record from the West Antarctic Ice Sheet (WAIS) Divide ice coIce Sheet (WAIS) Divide ice coice core.
New high - precision, high - resolution records of atmospheric methane from Greenland and Antarctic ice cores: 0 - 1800 A.D. American Geophysical Union, Fall Meeting 2009, abstract #PP41B -1524.
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You have argued with me with great conviction on other venues that the ice core records do not have great enough temporal resolution to justify saying that CO2 has not risen so high before.
Ice core records have a very bad resolution of about 20 - 30 years (ice age gas age) looking at the period 1925 - 1950, so it can not resolve a possible CO2 peIce core records have a very bad resolution of about 20 - 30 years (ice age gas age) looking at the period 1925 - 1950, so it can not resolve a possible CO2 peice age gas age) looking at the period 1925 - 1950, so it can not resolve a possible CO2 peak.
«High resolution records from Antarctic ice cores show that carbon dioxide concentrations increased... 600 ± 400 years after the warming...» — Dr. Hubertus Fischer et al., Science, 1999
YES — CO2 HAS BEEN ON AN UPWARD CLIMB, to levels above those seen for the last few ice ages (with the proviso that ice cores records have poorer resolution the further back in time one goes; there may have been short - lived CO2 spikes that we can not see); is all of that human - driven, or is there a natural warming trend driving the release of biotic CO2?
In their 2015 Science paper, Rhodes et al. presented an ice core methane record of unprecedented resolution, which showed rapid emissions of methane in response to Heinrich events.
Historical glacier movement, high resolution GISP2 ice core analysis, and crude temperature records from 17th century Europe suggest that it will.
229 Time resolution on the scale of a year or two can be obtained from semi-fossil trees, e.g., Roig et al (2001) have a 1229 - year - long stretch of tree - ring widths from the middle of the last ice age at 40 ° S that shows abrupt droughts with abrupt recoveries (tenfold changes in yearly accumulation), but they are floating in absolute time and such local records can not yet be matched to events in the ice - core records.
A study by Thomas, Dennis et al 2009 [8] derived a high resolution temperature proxy record from oxygen isotope ratios from the ice core.
Pollen cores are still a primary means of seeing what regional climates were doing, even though they suffer from poorer resolution than ice cores (worms churn the sediment, obscuring records of all but the longest - lasting temperature changes).
no. 5408, pp. 1712 — 1714 (12 March 1999) «High - resolution records from Antarctic ice cores show that carbon dioxide concentrations increased by 80 to 100 parts per million by volume 600 ± 400 years after the warming of the last three deglaciations.»
Although the Pentadecadal solar cycle displays low power and is statistically non-significant in the sunspot record, it is very prominent in the 10Be record from the one year resolution Dye 3 ice core for the period 1420 - 1992 AD (McCracken et al., 2013a; figure 87).
There are ice core records with 50 - year resolution going back to 1000AD: http://cdiac.ornl.gov/trends/co2/graphics/lawdome.gif.
The highest - resolution ice - core CO2 record, Law Dome, the CO2 record (MacFarling - Meure et al., 2006) provides independent validation of the observational record where the two overlap in time.
We will present a carbon dioxide record from 40 - 35 and 28 - 9 ka from the last glacial and deglacial periods from a new ice core from West Antarctica with an average sampling resolution of 25 - 50 yrs.
Also plotted in Fig. 2B is the scaled, high - resolution, East Antarctic dust record (14) from the European Project for Ice Coring in Antarctica, Dome C (EDC) ice core (75.1 ° S, 123.3 ° Ice Coring in Antarctica, Dome C (EDC) ice core (75.1 ° S, 123.3 ° ice core (75.1 ° S, 123.3 ° E).
The the Law Dome ice core record has a high resolution and even an overlap of about 20 years with the direct measurements at the South Pole.
The highest - resolution ice - core CO2 record, Law Dome, the CO2 record (MacFarling - Meure et al., 2006) provides independent validation of the Mauna Loa record where the two overlap in time.
Ahn, J., E. J. Brook, L. Mitchell, J. Rosen, J. R. McConnell, K. Taylor, D. Etheridge, and M. Rubino (2012), Atmospheric CO2 over the last 1000 years: A high - resolution record from the West Antarctic Ice Sheet (WAIS) Divide ice core, Global BiogeochIce Sheet (WAIS) Divide ice core, Global Biogeochice core, Global Biogeochem.
The newer WAIS ice core record will provide a higher - resolution CO2 record than EPICA Dome C and the Steinthorsdottir stomatal proxy:
However, from all this, I remain of the conclusion that stomatal reconstructions provide a better record of paleo - excursions in atmospheric CO2 than do ice core records, including back in the Holocene, and that ice core CO2 declines in resolution with greater age.
The current 110 ppmv spike in CO2 over the past 160 years would be detected in all ice cores, including the least resolution cores as the repeatability of CO2 measurements in ice cores is 1.2 ppmv (1 sigma), thus a spike of 100 ppmv, sustained over 10 years, would be noticed in the Dome C 800 kyear record.
It is worth considering though that we do have several high resolution proxy climate records from various regions around the world (think ice cores), and if abrupt global warming events happened in the past, then we might expect these local records to show them.....
Locations of proxy records with data back to AD 1000, 1500 and 1750 (instrumental: red thermometers; tree ring: brown triangles; borehole: black circles; ice core / ice borehole: blue stars; other including low - resolution records: purple squares) that have been used to reconstruct NH or SH temperatures by studies shown in Figure 6.10 (see Table 6.1, excluding O2005) or used to indicate SH regional temperatures (Figure 6.12).
We present here a high - resolution record of 10Be in the EPICA Dome C (EDC) ice core from Antarctica during the Marine Interglacial Stage 9.3 (MIS 9.3), 325 — 336 kyr ago, and investigate its spectral properties.
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