Sentences with phrase «year climate variations»

Not exact matches

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.

«Climate variations analyzed five million years back in time.»

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.

He and other scientists emphasized that this year's 50 percent rebound stemmed from normal weather variations, not an unusual climate shift.

While the atmosphere is mainly causing climate variations on shorter time scales, from months to years, the longer - term fluctuations, such as those on decadal time scales, are primarily determined by the ocean.

While natural climate variations like El Niño do affect the frequency and severity of heat waves from one year to the next, the study suggests the increases are mainly linked to long - term changes in sea surface temperatures.

While most previous such work focuses on mean or average values, the authors in this paper acknowledge that climate in the broader sense encompasses variations between years, trends, averages and extreme events.

Research published last year by Professors Cox and Friedlingstein showed that these variations in atmospheric carbon dioxide can reveal the sensitivity of tropical ecosystems to future climate change.

Professor Cox, from the College of Engineering, Mathematics and Physical Sciences said «The year - to - year variation in carbon dioxide concentration is a very useful way to monitor how tropical ecosystems are responding to climate.

It shows that while water in rivers and lakes would have disappeared as the climate changed due to variations in Earth's orbit, freshwater springs fed by groundwater could have stayed active for up to 1000 years without rainfall.

In a detailed study of more than 200 years» worth of temperature data, results backed previous findings that short - term pauses in climate change are simply the result of natural variation.

Although many technological improvements have been made to both grape growing and winemaking over the last few decades, climate is often the wild card in determining year - to - year variations in quality.

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.

«According to our study, the Atlantic / Pacific temperature difference shows pronounced variations on timescales of more than 5 years,» explained Chikamoto, USU associate professor in the department of Plants, Soils and Climate.

The secret to the unique diversity of Lake Malawi's cichlid fish may be down to huge variations in climate and water levels over the years

The changing climate will enhance the wide variations in weather that mid-latitude regions already experience from year to year and bring an increased number of extreme events such as heat waves and hailstorms, Busalacchi says.

«Remote cave study reveals 3000 years of European climate variation.»

The team used a worldwide climate model that incorporated normal month - to - month variations in sea surface temperatures and sea ice coverage, among other climate factors, to simulate 12,000 years» worth of weather.

«This is important for being able to predict years of top - quality cava production, as well as for exploring the possible effects and variations of climate change on the quality» he concluded.

For example, El Niño and La Niña described above characterize year - to - year variations of climate whereas the intra-seasonal time scale, discussed in our review article, bridges weather and climate, i.e. 20 to 100 days.

2) A better ability to constrain climate sensitivity from the past century's data 3) It will presumably be anticorrelated with year to year variations in global surface temperature that we see, especially from El Ninos and La Ninas, which will be nice whenever we have a cool year and the deniers cry out «global warming stopped!».

About our estimates of the climate transfer sensitivity to solar variations at 11 years and 22 years, Dr. Benestad makes again a great confusion by misquoting and misunderstanding our paper.

In order to calculate the terrestrial response to more ephemeral solar variations, S&W introduce another type of «climate sensitivity» which they calculate separately for each of two components representing frequency ranges 7.3 - 14.7 and 14.7 - 29.3 year ranges respectively.

in the other case, another friend made disparaging remarks about my cfl's and when i later said, very casually, something to the effect that he doubted the science, he referred to something dixie lee ray said at least fifty years ago about ice ages and climate variations.

Although droughts have been a natural part of the year - to - year variations in the Amazon's climate, both the frequency and severity of droughts in the rainforest have been increasing over the last decade because of climate change, Aragão says:

The presented range though does not correlate with an analogical temperature range constructed for the years 1068 - 1979 in Europe according to biological and documentary data (Guiot, J.: The combination of historical documents and biological data in the reconstruction of climate variations in space and time.

Periods of volcanism can cool the climate (as with the 1991 Pinatubo eruption), methane emissions from increased biological activity can warm the climate, and slight changes in solar output and orbital variations can all have climate effects which are much shorter in duration than the ice age cycles, ranging from less than a decade to a thousand years in duration (the Younger Dryas).

Over the last 30 years of direct satellite observation of the Earth's climate, many natural influences including orbital variations, solar and volcanic activity, and oceanic conditions like El Nino (ENSO) and the Pacific Decadal Oscillation (PDO) have either had no effect or promoted cooling conditions.

Understanding how such year - to - year natural climate variations impact coastal water levels is key to developing a full picture of the sea level rise threat through the end of the century.

«Climate models show that ice - sheet melt will dominate sea - level rise over the coming centuries, but our understanding of ice - sheet variations before the last interglacial 125,000 years ago remains fragmentary.

His research concerns understanding global climate and its variations using observations and covers the quasi biennial oscillation, Pacific decadal oscillation and the annular modes of the Arctic oscillation and the Antarctic oscillation, and the dominant spatial patterns in month - to - month and year - to - year climate variability, including the one through which El Niño phenomenon in the tropical Pacific influences climate over North America.

Multiple variables, from climate variations to the presence of wildlife carriers, cause rates of infections to vary dramatically from year to year — even within communities.

Although there are pronounced wet and dry seasons as well as variations between the interior climate and the climate along the coast, Belize boasts amazing warm temperatures every month of the year.

Climate is mild, with little variation in temperature year round.

Just like the rest of Fiji, Viti Levu has a tropical climate, meaning that the weather is nearly always warm and there is little seasonal variation in temperature throughout the year.

Climate change involves time scales of many years, and hence if emphasis is given to much shorter time scales, the trends will drown in noisy variations.

But you can look at past climate records, and see no sign, over many thousands of years, that solar variations have had effects of anything like the size needed to cancel out the expected effects of increased greenhouse gas levels in the atmosphere over the next few decades.

It is to be noted here that there is no necessary contradiction between forecast expectations of (a) some renewed (or continuation of) slight cooling of world climate for a few decades to come, e.g., from volcanic or solar activity variations; (b) an abrupt warming due to the effect of increasing carbon dioxide, lasting some centuries until fossil fuels are exhausted and a while thereafter; and this followed in turn by (c) a glaciation lasting (like the previous ones) for many thousands of years.»

2) A better ability to constrain climate sensitivity from the past century's data 3) It will presumably be anticorrelated with year to year variations in global surface temperature that we see, especially from El Ninos and La Ninas, which will be nice whenever we have a cool year and the deniers cry out «global warming stopped!».

Mike's work, like that of previous award winners, is diverse, and includes pioneering and highly cited work in time series analysis (an elegant use of Thomson's multitaper spectral analysis approach to detect spatiotemporal oscillations in the climate record and methods for smoothing temporal data), decadal climate variability (the term «Atlantic Multidecadal Oscillation» or «AMO» was coined by Mike in an interview with Science's Richard Kerr about a paper he had published with Tom Delworth of GFDL showing evidence in both climate model simulations and observational data for a 50 - 70 year oscillation in the climate system; significantly Mike also published work with Kerry Emanuel in 2006 showing that the AMO concept has been overstated as regards its role in 20th century tropical Atlantic SST changes, a finding recently reaffirmed by a study published in Nature), in showing how changes in radiative forcing from volcanoes can affect ENSO, in examining the role of solar variations in explaining the pattern of the Medieval Climate Anomaly and Little Ice Age, the relationship between the climate changes of past centuries and phenomena such as Atlantic tropical cyclones and global sea level, and even a bit of work in atmospheric chemistry (an analysis of beryllium - 7 measureclimate record and methods for smoothing temporal data), decadal climate variability (the term «Atlantic Multidecadal Oscillation» or «AMO» was coined by Mike in an interview with Science's Richard Kerr about a paper he had published with Tom Delworth of GFDL showing evidence in both climate model simulations and observational data for a 50 - 70 year oscillation in the climate system; significantly Mike also published work with Kerry Emanuel in 2006 showing that the AMO concept has been overstated as regards its role in 20th century tropical Atlantic SST changes, a finding recently reaffirmed by a study published in Nature), in showing how changes in radiative forcing from volcanoes can affect ENSO, in examining the role of solar variations in explaining the pattern of the Medieval Climate Anomaly and Little Ice Age, the relationship between the climate changes of past centuries and phenomena such as Atlantic tropical cyclones and global sea level, and even a bit of work in atmospheric chemistry (an analysis of beryllium - 7 measureclimate variability (the term «Atlantic Multidecadal Oscillation» or «AMO» was coined by Mike in an interview with Science's Richard Kerr about a paper he had published with Tom Delworth of GFDL showing evidence in both climate model simulations and observational data for a 50 - 70 year oscillation in the climate system; significantly Mike also published work with Kerry Emanuel in 2006 showing that the AMO concept has been overstated as regards its role in 20th century tropical Atlantic SST changes, a finding recently reaffirmed by a study published in Nature), in showing how changes in radiative forcing from volcanoes can affect ENSO, in examining the role of solar variations in explaining the pattern of the Medieval Climate Anomaly and Little Ice Age, the relationship between the climate changes of past centuries and phenomena such as Atlantic tropical cyclones and global sea level, and even a bit of work in atmospheric chemistry (an analysis of beryllium - 7 measureclimate model simulations and observational data for a 50 - 70 year oscillation in the climate system; significantly Mike also published work with Kerry Emanuel in 2006 showing that the AMO concept has been overstated as regards its role in 20th century tropical Atlantic SST changes, a finding recently reaffirmed by a study published in Nature), in showing how changes in radiative forcing from volcanoes can affect ENSO, in examining the role of solar variations in explaining the pattern of the Medieval Climate Anomaly and Little Ice Age, the relationship between the climate changes of past centuries and phenomena such as Atlantic tropical cyclones and global sea level, and even a bit of work in atmospheric chemistry (an analysis of beryllium - 7 measureclimate system; significantly Mike also published work with Kerry Emanuel in 2006 showing that the AMO concept has been overstated as regards its role in 20th century tropical Atlantic SST changes, a finding recently reaffirmed by a study published in Nature), in showing how changes in radiative forcing from volcanoes can affect ENSO, in examining the role of solar variations in explaining the pattern of the Medieval Climate Anomaly and Little Ice Age, the relationship between the climate changes of past centuries and phenomena such as Atlantic tropical cyclones and global sea level, and even a bit of work in atmospheric chemistry (an analysis of beryllium - 7 measureClimate Anomaly and Little Ice Age, the relationship between the climate changes of past centuries and phenomena such as Atlantic tropical cyclones and global sea level, and even a bit of work in atmospheric chemistry (an analysis of beryllium - 7 measureclimate changes of past centuries and phenomena such as Atlantic tropical cyclones and global sea level, and even a bit of work in atmospheric chemistry (an analysis of beryllium - 7 measurements).

But it's like I say: as planetary climate systems show all possible signs of disruption, what we get is strange climatic conditions and extreme weather events on a local level, and these conditions and event are conditioned by great variations from continent to continent and from one year to the next.

tpinlb, climate models don't «predict» year - specific phenomena arising from stochastic variation that adds «noise» to progression of climate states under the influence of persistent forcings.

Large changes in cosmic rays are documented in response to magnetic - field variations (the Laschamp event of about 40,000 years ago is especially prominent) with no corresponding change in climate, so any cosmic - ray influence on the climate must be very small (a weak correlation can be obscured by noise; a strong control is almost always visible «by eye,» and clearly is absent).

Jeff Tollefson, in Nature (http://www.nature.com/news/climate-change-the-case-of-the-missing-heat-1.14525): «For several years, scientists wrote off the stall as noise in the climate system: the natural variations in the atmosphere, oceans and biosphere that drive warm or cool spells around the globe.

How is it then possible that the IPCC climate models can replicate these decadal variations at exactly the same years?

Tad (215), there have been a couple papers come out in the last year that place the Australian drought in the context of natural variation and global climate change:

When Indian leaders and, by extension, news media, address climate change they frequently invoke some variation on the «per capita principle» — Prime Minister Manmohan Singh's vow that India's per - capita greenhouse gas emissions — just above one ton per year — will never exceed the West's.

«What is generally required [for proving solar forcing of climate change] is a consistent signal over a number of cycles (either the 11 year sunspot cycle or more long term variations), similar effects if the timeseries are split, and sufficient true degrees of freedom that the connection is significant and that it explains a non-negligible fraction of the variance.»

«Today, scientists who study the links between solar activity and climate are confident that the small variations in TSI associated with the eleven - year solar cycle can not explain the intensity and speed of warming trends seen on Earth during the last century.

Climate is notoriously «noisy», so it typically takes > 15 years to make out a trend of the current size of the global warming trend inside the typical interannual variation.