“We need to accelerate and intensify efforts to recover Antarctic meteorites. The loss of Antarctic meteorites is much like the loss of data that scientists glean from ice cores collected from vanishing glaciers – once
Depths of cores vary from a few meters to hundreds of meters. The sediment colour and composition of each layer in the samples can show what the past climate was like. Dark, organic materials suggest a warm and wet climate. Lighter sediments made up of more minerals and less organic matter...
On the one hand, we marvel at the tremendous scale revealed through their vast calderas and high-piled deposits, and we can intuit their climate-shifting capacity via ice cores, tree rings and microbes that alter their structure in response to climate changes. On the other, there's just so...
deep-sea sedimentpractical benefitsThis article explores the range of methods available to analyse ice and deep-sea sediment cores. It also explores the value of such cores in the context of reconstructing a record of Quaternary climate change, or paleoclimatic reconstruction. Paleoclimatic ...
[Rob P] Warming of tropical waters from the lastice ageto the present has been beneficial to coral reefs, but now that the tropics are reaching temperatures in summer that exceed the upper thermal tolerance threshold of coral that is no longer the case. This is why coral cores show no evi...
At depth, the team utilized modified push cores, or injector cores, to infuse a portion of the samples with a preservative (visible with red dye). These were then brought to the surface for gene-expression analyses to determine their metabolic pathways. Credit Ocean Exploration Trust, NOAA Ocea...
Atmosphere. How fast are the ice sheets melting? 来自 NCBI 喜欢 0 阅读量: 29 作者: Cazenave,A.摘要: Remote-sensing data suggest that ice sheets currently contribute little to sea-level rise. However, dynamical instabilities in response to climate warming may cause faster ice-mass loss.关键词...
Over the past 810,000 years (you’re too young to remember), global temperature reconstructed by Jouzel et al. (2007) from Greenland ice cores has varied by little more than your thermostat at home allows when the heating is on. That is how near-perfectly thermostatic the climate i...
Global surface temperature change over the past 810,000 years, obtained by halving (to correct the result for polar amplification) the temperature anomalies inferred from atmospheric δ18O ratios in ice cores from Vostok station, Antarctica. Absolute global temperature has varied by little more than...
The modern multiscale simulation took 56 h 34 min to complete 15 h simulated time on 540 cores. Run times are generally proportional to the number of elements (which are proportional to the number of degrees of freedom). Note that no parallel scaling tests were performed to ensure maximum ...