Sentences with phrase «since global observations»

Rising temperatures have caused the amount of Arctic sea ice to shrink dramatically since global observations began in the 1970s.

Rising temperatures have caused the amount of Arctic sea ice to shrink dramatically since global observations began in the 1970s.

Not exact matches

The GFSR begins with the observation that «Risks to financial stability have increased since the April 2012 GFSR, as confidence in the global financial system have become very fragile.»

The model is supported by observations from satellites, ground - based networks that measure ozone - depleting chemicals in the real world, and by observations from two decades of NASA aircraft field campaigns, including the most recent Airborne Tropical Tropopause Experiment (ATTREX) in 2013 and the Atmospheric Tomography (ATom) global atmospheric survey, which has made three deployments since 2016.

This was compared with historical tide - gauge and satellite observations of sea - level change for the «global warming» period, since the industrial revolution.

For global observations since the late 1950s, the most recent versions of all available data sets show that the troposphere has warmed at a slightly greater rate than the surface, while the stratosphere has cooled markedly since 1979.

Above the surface, global observations since the late 1950s show that the troposphere (up to about 10 km) has warmed at a slightly greater rate than the surface, while the stratosphere (about 10 — 30 km) has cooled markedly since 1979.

The basic fact that rising concentrations of greenhouse gases result in global warming has been understood since it was predicted from physical laws over a century ago; specification of the magnitude and geographical distribution of the warming are elucidated by the twentieth century observations and calculations.

http://journals.ametsoc.org/doi/abs/10.1175/JCLI-D-11-00148.1 Global satellite observations show the sea surface temperature (SST) increasing since the 1970s in all ocean basins, while the net air — sea heat flux Q decreases.

While land surface observations go back hundreds of years in a few places, data of sufficient coverage for estimating global temperature have been available only since the end of the 19th century.

This was one of the motivations for our study out this week in Nature Climate Change (England et al., 2014) With the global - average surface air temperature (SAT) more - or-less steady since 2001, scientists have been seeking to explain the climate mechanics of the slowdown in warming seen in the observations during 2001 - 2013.

If the predicted cooling by la Nina had not occurred then 2008 would probably have been the same temperature (given the uncertainties) as every year since 2001 and that in itself would require explanation.I am broadly in favour of the global warmingCO2 hypothesis but I know it is just that, a hypothesis — and that needs testing against real observations in the physical world.

Even putting aside the OHC data and fingerprinting, there is absolutely no evidence in model simulations (or in prevailing reconstructions of the Holocene), that an unforced climate would exhibit half - century timescale global temperature swings of order ~ 1 C. I don't see a good theoretical reason why this should be the case, but since Judith lives on «planet observations» it should be a pause for thought.

Or the claim that marine phytoplankton had declined by 40 % since 1950 due to global warming and ocean «acidification» headlined globally, and utterly refuted by observations..

Satellite observations available since the early 1990s provide more accurate sea level data with nearly global coverage.

Since 1980 the global marine observations have gone from a mix of roughly 10 % buoys and 90 % ship - based measurements to 90 % buoys and 10 % ship measurements (Kennedy et al. 2011).

Contrary to earlier suggestions that global warming may possibly decrease productivity (Grebmeier 2006), satellite observations have determined marine productivity has increased by 30 % since the 1990s (Arrigo 2015).

In reconstructing the changes in global mean temperature since 1850, Berkeley Earth has examined 16 million monthly average temperature observations from 43,000 weather stations.

Surface warming / ocean warming: «A reassessment of temperature variations and trends from global reanalyses and monthly surface climatological datasets» «Estimating changes in global temperature since the pre-industrial period» «Possible artifacts of data biases in the recent global surface warming hiatus» «Assessing the impact of satellite - based observations in sea surface temperature trends»

Ocean warming: «Assessing recent warming using instrumentally homogeneous sea surface temperature records» «Tracking ocean heat uptake during the surface warming hiatus» «A review of global ocean temperature observations: Implications for ocean heat content estimates and climate change» «Unabated planetary warming and its ocean structure since 2006»

A recent study by Cowtan et al. (paper here) suggests that accounting for these biases between the global temperature record and those taken from climate models reduces the divergence in trend between models and observations since 1975 by over a third.

Since then there are a number of papers published on why the warming was statistically insignificant including a recent one by Richardson et al. 2016 which tries to explain that the models were projecting a global tas (temperature air surface) but the actual observations are a combination of tas (land) and SST oceans, meaning projected warming shouldn't be as much as projected.

Specifically, the methodology of polynomial cointegration is used to test AGW since during the observation period (1880 — 2007) global temperature and solar irradiance are stationary in 1st differences whereas greenhouse gases and aerosol forcings are stationary in 2nd differences.

Satellite altimetry has provided global observations of rising sea levels since the early 1990s [Cazenave et al., 2014].

««Climate model simulations that consider only natural solar variability and volcanic aerosols since 1750 — omitting observed increases in greenhouse gases — are able to fit the observations of global temperatures only up until about 1950.»

However, there is not compelling evidence that anthropogenic CO2 was sufficient to influence Earth's temperatures prior to 1950, i.e. «Climate model simulations that consider only natural solar variability and volcanic aerosols since 1750 — omitting observed increases in greenhouse gases — are able to fit the observations of global temperatures only up until about 1950.»

Conclusion: From the above observation, for all the datasets the trend has decelerated and for Hadcrut3 global warming has stopped since 1997.

Third, climate change and its variation, as represented by global temperatures in Chart # 4, is evident since the first decade of observations.

«Assessing recent warming using instrumentally homogeneous sea surface temperature records» «Tracking ocean heat uptake during the surface warming hiatus» «A review of global ocean temperature observations: Implications for ocean heat content estimates and climate change» «Unabated planetary warming and its ocean structure since 2006»

Since the human - caused global warming hypothesis rests entirely upon mathematical computer projections and not upon experimental observations, these sciences are especially important in evaluating this hypothesis.

This time period is too short to signify a change in the warming trend, as climate trends are measured over periods of decades, not years.12, 29,30,31,32 Such decade - long slowdowns or even reversals in trend have occurred before in the global instrumental record (for example, 1900 - 1910 and 1940 - 1950; see Figure 2.2), including three decade - long periods since 1970, each followed by a sharp temperature rise.33 Nonetheless, satellite and ocean observations indicate that the Earth - atmosphere climate system has continued to gain heat energy.34

One approach is to estimate global temperature as a simple function of climate forcing and ENSO through a regression approach; perhaps the best - known example is Foster & Rahmstorf (2011), which found that when the impact of natural factors (volcanic eruptions, solar variations, and ENSO) is removed, the trend in global temperature has been remarkably steady since 1979 (when satellite observations of atmospheric temperature begin).

Ezra describes man - made global warming as «a theory that has been cast into disrepute through not only the misconduct of its high priests but by scientific observation itself: There has been no measurable global warming since 1998, according to satellite weather data.»

The crucial factor here is that «Since 1980 the global marine observations have gone from a mix of roughly 10 % buoys and 90 % ship - based measurements to 90 % buoys and 10 % ship measurements.»

Since the late 1970s, other data from Earth - observation satellites have been used to provide a wide range of global observations of various components of the climate system.

It seems to the writer that spreading global oceanic cycles of up to 30 years in length across 3 solar cycles results in a close enough match to fit temperature observations over the past few hundred years and especially since 1961.

Brandon Gates's commentary as in point 1) is based the premise that dangerous human - caused global warming requiring immediate radical mitigating action is occurring and has been since ~ 1800 and any observations that do not accord with or contradict that a priori assumption are airily dismissed by «that is the way CO2 induced warming occurs».

The observations of a global mean temperature «flat» with no linear trend since 1997 can not be discarded.

To discard observations (like the «pause» of the global mean temperatures since 1997 shown on the appended figure 1 - A) the IPCC folks put forward a hypothesis («the greenhouse effect well understood since more than hundred years «-RRB- but do not provide any definition of their «greenhouse effect ``.

Global sea levels have been rising since the glacial maximum of the last ice age some 18,000 years ago, but observations indicate that the rate of sea level rise is not accelerating and may even be decelerating.

Radiosonde - based observations (with near global coverage since 1958) and satellite - based temperature measurements (beginning in late 1978) show warming trends in the troposphere and cooling trends in the stratosphere.

The results open the possibility that recent climate sensitivity estimates from global observations and [intermediate complexity models] are systematically considerably lower or higher than the truth, since they are typically based on the same realization of climate variability.»

Since 1979, it has been possible to calculate a global temperature record of the atmosphere from satellite observations.

Global Warming Theory «Completely Disconnected From the Observations» Extensive analysis of temperature trends in the Arctic reveals that there has been no detectable long - term change since the beginning of the 20th century, and thus predictions of a sea ice - free Arctic in the coming decades due to dramatically rising temperatures are not rooted in observation.

Since that day at Pelican Cays, I have been fortunate to travel to many sites around the globe, ranging from the waters of the southern Pacific Ocean to the crashing surf along the Pacific coast of North America, and what I see matches the observations made by what now is an army of scientists: The Earth's flora and fauna are changing — shifting their geographic locations, altering when they reproduce or dying wholesale — as a result of human - induced global warming.

As I have stated publicly on many occasions, there is no definitive scientific proof, through real - world observation, that carbon dioxide is responsible for any of the slight warming of the global climate that has occurred during the past 300 years, since the peak of the Little Ice Age.

More frequent observations of bleaching events may be partially due to the advent of remote sensing satellites that have allowed greater global coverage only since the 1980s.

C / decade and the simulated ensemble mean over the models, calculated from the grid boxes of the models where observations exist (which is flawed in my opinion, since excluding of mostly the high latitudes from the model data may emphasize a warm bias in lower latitudes in the models making them appear warmer than they are, but a possible cold bias of the global observations data set is not excluded in this way) had a trend of 0.3 deg.

the current assessment concludes that there is not enough evidence at present to suggest more than low confidence in a global - scale observed trend in drought or dryness (lack of rainfall) since the middle of the 20th century, owing to lack of direct observations, geographical inconsistencies in the trends, and dependencies of inferred trends on the index choice.

The basic fact that rising concentrations of greenhouse gases result in global warming has been understood since it was predicted from physical laws over a century ago; specification of the magnitude and geographical distribution of the warming are elucidated by the twentieth century observations and calculations.