Sentences with phrase «mean surface temperature record»

Removal of that hidden variability from the actual observed global mean surface temperature record delineates the externally forced climate signal, which is monotonic, accelerating warming during the 20th century.

Not exact matches

First, a graph showing the annual mean anomalies from the CMIP3 models plotted against the surface temperature records from the HadCRUT4, NCDC and GISTEMP products (it really doesn't matter which).

To contribute to an understanding of the underlying causes of these changes we compile various environmental records (and model - based interpretations of some of them) in order to calculate the direct effect of various processes on Earth's radiative budget and, thus, on global annual mean surface temperature over the last 800,000 years.

More than 95 % of the 5 yr running mean of the surface temperature change since 1850 can be replicated by an integration of the sunspot data (as a proxy for ocean heat content), departing from the average value over the period of the sunspot record (~ 40SSN), plus the superimposition of a ~ 60 yr sinusoid representing the observed oceanic oscillations.

Large variability reduces the number of new records — which is why the satellite series of global mean temperature have fewer expected records than the surface data, despite showing practically the same global warming trend: they have more short - term variability.

There is a strong correlation between annual mean temperatures (in the satellite tropospheric records and surface analyses) and the state of ENSO at the end of the previous year.

I also quarrel with the idea that a historical «record» of the earths mean surface temperature exists either now or can be reconstructed for 1850 etc..

This February's sea surface temperatures were 1.46 degrees above average, which means the past nine months have been the nine highest monthly global ocean temperature departures on record.

«These papers should lay to rest once and for all the claims by John Christy and other global warming skeptics that a disagreement between tropospheric and surface temperature trends means that there are problems with surface temperature records or with climate models,» said Alan Robock, a meteorologist at Rutgers University.

An ominous sign considering that El Nino is the hot phase of atmospheric and surface temperature variability — which may mean that the next El Nino will drive a global high temperature departure even more extreme than 2014's record setting value.

Indeed, things do seem to be warming up as the Earth's average surface temperature climbed to a record high in 1995, continuing a pattern of hotter mean temperatures for our planet.

Such Hurst phenomena have been observed in the stochastic processes of nature in the area of hydrology (Hurst) and also in the proxy record of annual mean surface temperature at a millennial time scale (Barnett).

However, this doesn't mean that CO2 based Anthropogenic Global Warming began in 1950, because if you look at the Met Office — Hadley Center HadCRUT4 Global Surface Temperature record for the last 163 years you can see that temperatures didn't warm during the 1950s, nor the 60s:

Based on proxy records from ice, terrestrial and marine archives, the LIG is characterized by an atmospheric CO2 concentration of about 290 ppm, i.e., similar to the pre-industrial (PI) value13, mean air temperatures in Northeast Siberia that were about 9 °C higher than today14, air temperatures above the Greenland NEEM ice core site of about 8 ± 4 °C above the mean of the past millennium15, North Atlantic sea - surface temperatures of about 2 °C higher than the modern (PI) temperatures12, 16, and a global sea level 5 — 9 m above the present sea level17.

What this means is that because (a) the land surface temperature record does in fact combine temperature measurements of light wind and windy nights and (b) there has been a reduction in nighttime cooling, the long - term temperature record may be contaminated by a warm bias that accentuates the observed trend of warmer temperatures.

Because Tatoosh temperature is only recorded from April to September, we used Cape Elizabeth Buoy (NDBC Buoy 46041, www.ndbc.noaa.gov) for mean daily sea surface temperature (SST, °C).

The record temperatures occurred despite a moderate occurrence of La Niña, a phenomenon over the Pacific Ocean that tends to lead to cooler temperatures at the surface, affecting the global mean.

A paper published back in 1998 and co-authored by Richard Tol and titled: A BAYESIAN STATISTICAL ANALYSIS OF THE ENHANCED GREENHOUSE EFFECT dealt with climate sensitivity, even though the main purpose of the paper was to demonstrate: «This paper demonstrates that there is a robust statistical relationship between the records of the global mean surface air temperature and the atmospheric concentration of carbon dioxide over the period 1870 — 1991.»

One must define down «global mean temperature» to focus on surface temps (not effected by the greenhouse effect) and a few other narrow things, and to make up just the right combination of ways of extrapolating from what are actually a relative dearth of samples, in order to come up with this «record - breaking» system.

Now, researchers from Germany and the US, who examined global mean surface temperature (GMST) trends in the light of a recent series of three record - breaking years in a row in most data sets, have published the results of their study, which identified two important pitfalls in analysing GMST trends, in Environmental Research Letters.

The new adjustment are likely to have a substantial impact on the historical record of global - mean surface temperatures through the middle part of the twentieth century.

I agree, the surface temperature record (s)(from 1880 to present) is / are a heterogeneous mess simply because said origin of said records were never meant to be anything other than what they are,.....

Four different groups produce temperature records that attempt to compile a single global mean surface temperature: NASA's GISStemp, the Hadley Center's HadCRU, Remote Sensing Systems» RSS, and the University of Alabama, Huntsville's UAH.

The Met Office's Professor Adam Scaife FRMetS stated: «The global mean surface temperature this year looks likely to agree with the prediction we made at the end of last year that 2017 would be very warm but was unlikely to exceed the record temperature of 2015 and 2016.»

Because, remember, that at the end of the year the global mean surface temperature («GMST») record looked like this:

`... over the 100 years since 1870 the successive five year values of average temperatures in England have been highly significantly correlated with the best estimates of the averages for the whole Northern Hemisphere and for the whole earth» (In this last comment he is no doubt referring to his work at CRU where global surface records back to 1860 or so were eventually gathered) he continued; «they probably mean that over the last three centuries the CET temperatures provide a reasonable indication of the tendency of the global climatic regime.»

Here tests for causality using the global mean near - surface air temperature (GT) and Atlantic sea - surface temperature (SST) records during the Atlantic hurricane season are applied.

I don't think these new results will in any case affect the yearly mean temperature grid calculations, as they depend on actual surface station temperature records — which both we and Steig et al. used — and not on reconstructed gridded data.

During the warm intervals of the middle Pliocene (3.3 to 3.0 million years ago), when there is medium confidence that global mean surface temperatures were 2 °C to 3.5 °C warmer than for pre-industrial climate and CO2 levels were between 250 and 450 ppm, sedimentary records suggest periodic deglaciation of West Antarctica and parts of East Antarctica.

And that, combined with the current record ocean temperatures — and faster than expected warming of the ocean's surface layer — means we can expect a continuation of the unexpectedly fast loss of Arctic sea ice and of land - locked ice in Greenland and Antarctica.

An index used in many climate change detection studies is global mean surface temperature, either as estimated from the instrumental record of the last 140 years, or from palaeo - reconstructions.

However, the point I am making is that the efforts of the IPCC to define climate sensitivity will have no policy value if that which we measure (and the way in which we measure and calculate it) to achieve our records of global mean surface temperature is not in fact a true reflection of the heat energy at the surface.

Ho added that the enhanced intensification of tropical cyclones over East Asian coastal seas caused by changes in sea surface temperature and wind flows mean that «an individual tropical cyclone could strike East Asia, including the Philippines, with a record - breaking power, for example Haiyan, even though landfall intensity in south - east Asia has not notably changed on average in recent years because of the shifted genesis location; note that Haiyan formed over the eastern Philippine Sea far from land.»