Sentences with phrase «year climate periods»

The ratio allows for depicting visually the influence of all those previous CO2 emissions on moving 30 - year climate periods.

Not exact matches

If, for example, it turns out that 30 years from now we enter a period of global cooling, will we then accuse climate - change activists of greed and unethical behaviour?

First in revenue and loan growth (adjusted for significant acquisitions) when averaged over the one -, three -, and five - year periods, reflecting the fact that the Company continued to provide credit to consumers, small businesses, and commercial companies in the current credit climate; and

And — perhaps partly because of that — they have been unsuccessful in predicting future climate, even over periods as short as fifteen years.

Climate change is a significant and lasting change in the statistical distribution of weather patterns over periods ranging from decades to millions of years.

Energy and climate change secretary Chris Huhne yesterday updated the Commons on the government's fourth carbon budget, which will cover the five - year period to 2027.

Notably, the rise and expansion of both the Indus Valley civilization (from about 5350 years to about 4600 years ago) and the Vedic civilization (from about 3450 years to about 3100 years ago) occurred during periods when climate was relatively warm, wet, and stable.

Researchers from the Niels Bohr Institute have analysed the natural climate variations over the last 12,000 years, during which we have had a warm interglacial period and they have looked back 5 million years to see the major features of the Earth's climate.

New research could explain why the Arctic was much warmer during a period millions of years ago that scientists say most closely resembles Earth's climate today

Using different calibration and filtering processes, the two researchers succeeded in combining a wide variety of available data from temperature measurements and climate archives in such a way that they were able to compare the reconstructed sea surface temperature variations at different locations around the globe on different time scales over a period of 7,000 years.

Sedimentary rock layers provide a more compressed view of climate, as each layer of sediment is made over a period of hundreds of thousands to millions of years.

For instance, next year the ship JOIDES Resolution is scheduled to drill into the floor of the Pacific Ocean to extract rock cores that will span the period from about 53 million to 18 million years ago, a time of vast climate change.

If there is a high level of acidity, the measurement turns out and it works great for measuring the climate of the past all the way back to the last interglacial period 125,000 years ago.

A Swiss - led group using tree - ring data to look at Central European summer climate patterns during roughly 2,500 years saw that periods of prolonged warming and of colder than usual spells coincided with social upheavals.

But the last 100 years are interesting for climate researchers as it is the period where we have had massive pollution of the atmosphere from industrialisation, vehicle use and people's energy consuming lifestyles.

It is also the longest period of globally stable climate and sea level in at least the last 400,000 most recent years of seesaw between glaciation and warmer times.

If climate change gets catastrophic — and the world sees more than 6 degrees Celsius warming of average temperatures — the planet will have left the current geologic period, known as the Quaternary and a distant successor to the Ordovician, and have returned to temperatures last seen in the Paleogene period more than 30 million years ago.

The study was based on reconstructions and climate modelling of a period of global warming 56 million years ago.

The Holocene Climate Optimum was a period of global climate warming that occurred between six to nine thousand yeaClimate Optimum was a period of global climate warming that occurred between six to nine thousand yeaclimate warming that occurred between six to nine thousand years ago.

The period of intense climate warming, related to the emplacement of large amounts of basalt of the Siberian Traps and which we previously thought was responsible for the extinction of marine species, in fact happened 500,000 years after the Permian - Triassic boundary.

To assess how future heat waves might affect air travel, researchers used climate models to estimate hour - by - hour temperatures throughout the year at 19 particularly busy airports in the United States, Europe, the Middle East, China, and South Asia for the period between 2060 and 2080.

«The link between climate, population growth and innovation is also important for us today as we have been fortunate to have had a recent and long (about 10,000 years) period of relative warmth and climatic stability,» Stringer added.

Station locations change and methods evolve, so the climate data center warns that comparing normals between different 30 - year periods may lead to «erroneous conclusions» about climate change.

The IPO has a profound impact on our climate because it is a powerful natural climate lever with a lot of momentum that changes very slowly over periods of 10 - 30 years.

Using sophisticated atmospheric and climate models, the researchers estimated the levels of PM2.5 directly attributable to wildfires during a recent six - year period, 2004 to 2009, as well as under projected future climate change conditions (2046 - 2051).

What proved possible included an extension of the Kyoto Protocol for a period of either five or seven years (excluding Canada, Japan and Russia but adding nitrogen trifluoride, used in semiconductor manufacture, to the list of gases covered — CO2, methane, nitrous oxide, sulfur hexafluoride, perfluorocarbons), a Green Climate Fund to help low - income countries cope (albeit without any actual funds yet), an Adaptation Committee to coordinate such efforts globally, rules for a global program to reduce deforestation and how to monitor such deforestation, and a Climate Technology Center that will help launch projects to reduce greenhouse gas emissions.

«In addition, this early phase of evolutionary divergence appears to have preceded the extreme climate changes that led to Snowball Earth, a period marked by severe long - term global glaciation that lasted from about 720 to 635 million years ago,» Dohrmann says.

The goal of the AIM mission is to find answers to these questions as well as to their possible connection to climate change over a two - year period.

California just finished the hottest first half year on record, a period going back 120 years, according to the national climate overview for June released by the National Oceanic and Atmospheric Administration (NOAA).

U-series dating is hardly new and has been used on corals before, but usually for the purpose of dating sea - level changes, glaciation, and world climate shifts over periods of 100,000 years.

Geological evidence pointed to the springs being active during the driest periods of climate fluctuations that occurred around 1.8 million years ago, a critical period for hominin evolution.

So they created a set of global climate models to analyze the ocean and atmosphere over a 40 - year period, keeping carbon dioxide levels fixed.

When the team put the two sets of data together, though, along with climate data from the same 150 - year period, they could clearly see the link between periods of slow growth and dead trees later on.

«The climate changed quite often from warmer to colder, and vice versa, but at all times it was much colder than the interglacial period that we have lived in for the past 10,000 years.»

When he lined up their ages with global climate records, he noticed a pattern: Many species of megafauna seemed to disappear during a period of extreme warming around 12,300 years ago, Cooper and his team write today in Science Advances.

The sediment cores used in this study cover a period when the planet went through many climate cycles driven by variations in Earth's orbit, from extreme glacial periods such as the Last Glacial Maximum about 20,000 years ago, when massive ice sheets covered the northern parts of Europe and North America, to relatively warm interglacial periods with climates more like today's.

The date of the impact, estimated at slightly less than 66 million years ago, converges with the hypothesis that worldwide climate disruption in this period caused a mass extinction event in which 75 % of plant and animal species on Earth suddenly became extinct, including all non-avian dinosaurs.

The climate - change velocity used in our Report thus likely reflects a much longer period than 21,000 years, probably the whole Late Quaternary, and perhaps even beyond.

In this study, researchers examined vegetation change as a function of wildfire disturbance and climate change over a 100 - year period.

Though the rate of savings loss spiked during the Great Recession, middle - and older - age Americans consistently lost savings across the 20 - year period, regardless of the larger economic climate.

These remains confirm that the deposits date to a warm period of climate around 420,000 years ago, the so - called Hoxnian interglacial, when the climate was probably slightly warmer than the present day.

But the period of time over which the team analysed the long - term trend in warming was the past 50 years, in which this oscillation hasn't changed significantly — so almost all the warming looks to have been the result of anthropogenic climate change.

We also know that if we do very little about climate change we'll be at 550 ppm probably within a period of around 30 or 35 years.

To meet the ’10 000 year criterion», set by the DOE, the repository must not release «significant» amounts of its radioactive content into the environment during that period, no matter what changes occur in the local climate, geology or water table.

The team studied storm development from the Pliocene era, roughly three million years ago, and chose that time period because it was the last time the Earth had as much carbon dioxide as it does now, and the changes in climate from it can play a major role in storm formation and intensity.

Ice cores drilled from a glacier in a cave in Transylvania offer new evidence of how Europe's winter weather and climate patterns fluctuated during the last 10,000 years, known as the Holocene period.

Earth's climate naturally varies between times of warming and periods of extreme cooling (ice ages) over thousands of years.

They find that a wetter climate and lower sea levels could have enticed humans to cross from Africa into the Arabian Peninsula and the Middle East during four periods, roughly around 100,000, 80,000, 55,000, and 37,000 years ago.

A forest that grew between 5 and 10 degrees from the South Pole about 260 million years ago is challenging ideas about the climate in the Permian period.

The research, published in Nature Communications, examined preserved fossil remains of coccolithophores from a period of climate warming and ocean acidification that occurred around 56 million years ago — the Paleocene Eocene Thermal Maximum (PETM)-- and provides a much - needed long - term perspective of coccolithophore response to ocean acidification.