Sentences with phrase «estimating global average surface temperatures»

A paper in this week's Nature by Caroline Snyder at Stanford provides a fresh attempt at estimating global average surface temperatures across the Pleistocene (her estimates cover the last 2 million years).

Willis, this brings up an issue that I have never seen properly discussed, to wit: Are the surface statistical models like HadCRU estimating the global average surface temperature anomaly, or the global atmospheric temperature anomaly?

Not exact matches

Global surface temperatures in 2016 averaged 14.8 degrees Celsius (58.64 °F), or 1.3 C (2.3 F) higher than estimated before the Industrial Revolution ushered in wide use of fossil fuels, the EU body said.

Global mean temperatures averaged over land and ocean surfaces, from three different estimates, each of which has been independently adjusted for various homogeneity issues, are consistent within uncertainty estimates over the period 1901 to 2005 and show similar rates of increase in recent decades.

Item 8 could be confusing in having so many messages: «It is extremely likely that more than half of the observed increase in global average surface temperature from 1951 to 2010 was caused by the anthropogenic increase in greenhouse gas... The best estimate of the human - induced contribution to warming is similar to the observed warming over this period....

Present estimates are that limiting the increase in global average surface temperature to no more than 2 — 2.5 °C above its 1750 value of approximately 15 °C will be required to avoid the most catastrophic, but certainly not all, consequences of climate change.

It compiles a diverse set of sea surface (not deep water) temperature proxies to estimate a spatially - weighted global average temperature anomaly.

When he presented his misleading graph, when he said 97 % of climate scientists agree, (knowing full well the actual situation that the number is bogus and misleading,) when he mentions adjustments to satellite data but not to surface temperatures with major past cooling and absurd derived precision to.005 * C, when he defends precision in surface global averages but ignores major estimates of temps and krigging in Arctic, Africa, Asia and oceans or Antarctica, he forfeits credibility.

``... the UN IPCC... estimates that the average global surface temperature is likely to increase by between 1.4 and 5.8 °C by 2100.»

Changes in instrumentation and data availability have caused time - varying biases in estimates of global - and regional - average sea - surface temperature.

There are a number of papers by Samuel S. Shen looking at the design of observing networks for estimating spherical harmonics with idealised surface temperature distributions, but I'm not aware of the technique having been used to reconstruct global average temperature using the real distribution of stations and data.

Uncertainties of estimated trends in global - and regional - average sea - surface temperature due to bias adjustments since the Second World War are found to be larger than uncertainties arising from the choice of analysis technique, indicating that this is an important source of uncertainty in analyses of historical sea - surface temperatures.

Second — and I have a feeling you didn't know this — NH extratropical land surface temperatures are the main determinant of global average temperature estimates.

It says the average land and ocean - surface temperature for 2001 - 2010 was estimated to be 14.47 °C, or 0.47 °C above the 1961 - 1990 global average and +0.21 °C above the 1991 - 2000 global average (with a factor of uncertainty of ± 0.1 °C).

Absolute estimates of global average surface temperature are difficult to compile for several reasons.

One study estimates that there are likely to be places on Earth where unprotected humans without cooling mechanisms, such as air conditioning, would die in less than six hours if global average surface temperature rises by about 12.6 ° F (7 ° C).16 With warming of 19.8 - 21.6 ° F (11 - 12 ° C), this same study projects that regions where approximately half of the world's people now live could become intolerable.7

Rohde, R. et al: «A new estimate of the average earth surface land temperature spanning 1753 to 2011», Manuscript: text presented at the 3rd Santa Fe conference on global and regional climate temperature change, 2011

The WMO's preliminary estimate, based on data from January to October, shows that the global average surface temperature for 2015 so far is around 0.73 °C above the 1961 - 1990 average of 14 °C, and approximately 1 °C above the pre-industrial 1880 - 1899 period.

This point was also made by Schmidt et al. (2014), which additionally showed that incorporating the most recent estimates of aerosol, solar, and greenhouse gas forcings, as well as the El Niño Southern Oscillation (ENSO) and temperature measurement biases, the discrepancy between average GCM global surface warming projections and observations is significantly reduced.

There have been a number of estimates of the average global surface temperature change during the LGM.

Provisional estimates of average global temperatures based on monthly climatological land - station and sea - surface temperature records have suggested it could be the warmest year on record.

The World Meteorological Organization (WMO) released its provisional Statement on the State of the Climate this week, estimating that 2017 is likely to be one of the warmest years for global average surface temperature, with many high - impact events including catastrophic hurricanes, floods, heatwaves and droughts.

Estimated long - term variations in average global temperature of the atmosphere near the earth's surface are graphed along with average troposphere CO2 levels over the past 160,000 years.

11 Temperature change over past 1,000 years Temperature change (C °) Figure 20.2 Science: estimated changes in the average global temperature of the atmosphere near the earth's surface over different perioTemperature change over past 1,000 years Temperature change (C °) Figure 20.2 Science: estimated changes in the average global temperature of the atmosphere near the earth's surface over different perioTemperature change (C °) Figure 20.2 Science: estimated changes in the average global temperature of the atmosphere near the earth's surface over different periotemperature of the atmosphere near the earth's surface over different periods of time.

`... 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.»

10 Temperature change over past 22,000 years Agriculture established Temperature change (C °) End of last ice age Average temperature over past 10,000 years = 15 °C (59 °F) Figure 20.2 Science: estimated changes in the average global temperature of the atmosphere near the earth's surface over different perioTemperature change over past 22,000 years Agriculture established Temperature change (C °) End of last ice age Average temperature over past 10,000 years = 15 °C (59 °F) Figure 20.2 Science: estimated changes in the average global temperature of the atmosphere near the earth's surface over different perioTemperature change (C °) End of last ice age Average temperature over past 10,000 years = 15 °C (59 °F) Figure 20.2 Science: estimated changes in the average global temperature of the atmosphere near the earth's surface over different periods oAverage temperature over past 10,000 years = 15 °C (59 °F) Figure 20.2 Science: estimated changes in the average global temperature of the atmosphere near the earth's surface over different periotemperature over past 10,000 years = 15 °C (59 °F) Figure 20.2 Science: estimated changes in the average global temperature of the atmosphere near the earth's surface over different periods oaverage global temperature of the atmosphere near the earth's surface over different periotemperature of the atmosphere near the earth's surface over different periods of time.

(See NCDC Global Surface Temperature Anomalies) The same file states «The global monthly surface temperature averages in the table below can be added to a given month's anomaly (departure from the 1880 to 2004 base period average) to obtain an absolute estimate of surface temperature for that month.&Global Surface Temperature Anomalies) The same file states «The global monthly surface temperature averages in the table below can be added to a given month's anomaly (departure from the 1880 to 2004 base period average) to obtain an absolute estimate of surface temperature for that month.Surface Temperature Anomalies) The same file states «The global monthly surface temperature averages in the table below can be added to a given month's anomaly (departure from the 1880 to 2004 base period average) to obtain an absolute estimate of surface temperature for that moTemperature Anomalies) The same file states «The global monthly surface temperature averages in the table below can be added to a given month's anomaly (departure from the 1880 to 2004 base period average) to obtain an absolute estimate of surface temperature for that month.&global monthly surface temperature averages in the table below can be added to a given month's anomaly (departure from the 1880 to 2004 base period average) to obtain an absolute estimate of surface temperature for that month.surface temperature averages in the table below can be added to a given month's anomaly (departure from the 1880 to 2004 base period average) to obtain an absolute estimate of surface temperature for that motemperature averages in the table below can be added to a given month's anomaly (departure from the 1880 to 2004 base period average) to obtain an absolute estimate of surface temperature for that month.surface temperature for that motemperature for that month.»

Those suggest that the concentration of CO2 last approached 400 ppm about 3 to 5 million years ago, a period when global average surface temperature is estimated to have been about 2 to 3.5 °C higher than in the pre-industrial period.

We recently discussed this subject during our dialogue with Dr. Pielke Sr., and showed that using the CO2 radiative forcing estimate of Skeie et al. (2011) and the Padilla et al. (2011) 90 % confidence range for the transient climate sensitivity parameter, we can estimate a CO2 contribution of 0.64 to 1.28 °C, with a best estimate of 0.79 °C warming of average global surface temperature over the past ~ 150 years.

«Overall my best estimate of the 2014 annual global surface temperature anomaly is 0.626 + / - 0.05 C above the 1961 - 1990 average, making it likely to be the hottest year on record after the 0.547 C anomaly in 2010.»

This is a direct estimate of global average sea surface temperature.