Sentences with phrase «temperatures over short time periods»

In its section on the evaluation of climate models, it points out models may have difficulty simulating the course of temperatures over short time periods, but doesn't directly discuss what's happening here and now.

Not exact matches

Scientists now think that massive volcanic activity, in a Large Igneous Province called the Siberian Traps, raised air and sea temperatures and released toxic amounts of greenhouse gases into the atmosphere over a very short period of time.

The body can cool itself over a short period of time and return to a normal temperature as long as cooling mechanisms are not overwhelmed by too much intense heat.

Re # 30 and 33: You might also want to look at this RealClimate post showing what sort of variations one sees for temperature trends in climate models forced with steadily - increasing levels of CO2 over such short time periods: http://www.realclimate.org/index.php/archives/2008/05/what-the-ipcc-models-really-say

Over very long time periods such that the carbon cycle is in equilibrium with the climate, one gets a sensitivity to global temperature of about 20 ppm CO2 / deg C, or 75 ppb CH4 / deg C. On shorter timescales, the sensitivity for CO2 must be less (since there is no time for the deep ocean to come into balance), and variations over the last 1000 years or so (which are less than 10 ppm), indicate that even if Moberg is correct, the maximum sensitivity is around 15 ppm CO2 / deg C. CH4 reacts faster, but even for short term excursions (such as the 8.2 kyr event) has a similar sensitivOver very long time periods such that the carbon cycle is in equilibrium with the climate, one gets a sensitivity to global temperature of about 20 ppm CO2 / deg C, or 75 ppb CH4 / deg C. On shorter timescales, the sensitivity for CO2 must be less (since there is no time for the deep ocean to come into balance), and variations over the last 1000 years or so (which are less than 10 ppm), indicate that even if Moberg is correct, the maximum sensitivity is around 15 ppm CO2 / deg C. CH4 reacts faster, but even for short term excursions (such as the 8.2 kyr event) has a similar sensitivover the last 1000 years or so (which are less than 10 ppm), indicate that even if Moberg is correct, the maximum sensitivity is around 15 ppm CO2 / deg C. CH4 reacts faster, but even for short term excursions (such as the 8.2 kyr event) has a similar sensitivity.

Since CO2 isn't the only controller of temperature, internal variability can cause temperatures to decrease over these relatively short periods of time.

Weather Atmospheric conditions in a particular location over a short period of time Includes: temperature,

Over a very short period of time, from the winter of 1915/16 to the winter of 1921/22, winter temperatures had risen by about 10ºC, never coming back to pre 1918/19 level, but increasing at a lower level until ca. 1940.

************** «witchtistics»: use of a «witch stick» (eg, least squares regression) to «divine» the global temperature temperature trend (or other climatological trends) over short time periods.

Your «standstill» here is just the fact that one can't statistically detect a warming trend in the mentioned temperature anomaly over the short time period of the recent decade.

In recent decades, much research on these topics has raised the questions of «tipping points» and «system flips,» where feedbacks in the system compound to rapidly cause massive reorganization of global climate over very short periods of time — a truncation or reorganization of the thermohaline circulation or of food web structures, for instance, caused by the loss of sea ice or warming ocean temperatures.

Over short periods of time natural variability such as from ENSO for example, can create short term effects that run contrary to the longer term trend of increasing ocean heat content and higher tropospheric temperatures.

The view of global temperature prior to MBH98 was of considerable variability, with both hotter and considerably colder times (in comparison with today) over the last two thousand years, with significant temperature swings over comparatively short time periods.

It doesn't mean that there can't be any natural variability that appears as wobbles in the temperature record (or in other climate variables), masking the multi-decadal temperature trend over a time scale shorter than 20 years with the effect that the longer term trend is not statistically detectable in the time series, if one chooses the time period only short enough.

Jan Perlwitz says:» It doesn't mean that there can't be any natural variability that appears as wobbles in the temperature record (or in other climate variables), masking the multi-decadal temperature trend over a time scale shorter than 20 years with the effect that the longer term trend is not statistically detectable in the time series, if one chooses the time period only short enough.»

Heck, in order to make a statistically significant change over such a short period of time and overcome the noise, there would have to be a very hefty drop in temperatures.

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

Judith writes: «Comparing the model temperature anomalies with observed temperature anomalies, particularly over relatively short periods, is complicated by the acknowledgement that climate models do not simulate the timing of ENSO and other modes of natural internal variability...»

Temperatures cherry - picked from a short time period are going to deviate from the mean value over a longer period.

Comparing the model temperature anomalies with observed temperature anomalies, particularly over relatively short periods, is complicated by the acknowledgement that climate models do not simulate the timing of ENSO and other modes of natural internal variability; further the underlying trends might be different.

If the sea level response to a change in temperature is an exponential decay to equilibrium then given that the 0.8 C temperature increase since pre-industrial times occurred over a relatively short time period relative to time scale of the ice - albedo feedback, the expected rate of sea level rise should be approximately 3 m / C * 0.8 C / 560 y = 43 cm per century.