Sentences with phrase «globally averaged levels»

While the monthly average levels of CO2 at Hawaii's Mauna Loa observatory exceeded 400 ppm in 2014, the globally average levels surpassed 400 ppm for the first time this year, and the rate of CO2 emissions continues to increase.

Not exact matches

Sea levels are rising globally by 3 millimetres on average.

Globally, sea levels rose an average of 1.7 millimetres per year between 1901 and 2010.

«we estimate that less than 23 %, at the 95 % confidence level, of the 11 - year cycle changes in the globally averaged cloud cover observed in solar cycle 22 is due to the change in the rate of ionization from the solar modulation of cosmic rays.»

A new paper Assessing the Globally Averaged Sea Level Budget on Seasonal and Interannual Time Scales (Willis 2008) displays up - to - date data on ocean heat.

«Globally averaged sea - level rise anomaly (relative to 1986 — 2005) owing to thermal expansion (red line, as in Fig. 2), and the example from the IPCC AR4 (dashed green line) for RCP8.5 (a), RCP4.5 (b) and RCP2.6 (c).

Since 1850, CO2 levels rose, as did the «globally and annually averaged land and sea surface temperature anomaly» (for what it's worth), but nobody knows whether or not the increase in CO2 had anything whatsoever to do with the warming.

Northern sea ice is nearly back to average levels globally for the first time in at least a decade after years of spectacular declines.

The GRACE observations over Antarctica suggest a near - zero change due to combined ice and solid earth mass redistribution; the magnitude of our GIA correction is substantially smaller than previous models have suggested and hence we produce a systematically lower estimate of ice mass change from GRACE data: we estimate that Antarctica has lost 69 ± 18 Gigatonnes per year (Gt / yr) into the oceans over 2002 - 2010 — equivalent to +0.19 mm / yr globally - averaged sea level change, or about 6 % of the sea - level change during that period.

Projected globally averaged sea - level rise at the end of the 21st century (2090 to 2099), relative to 1980 to 1999 for the six SRES scenarios, ranges from 0.19 to 0.58 m (Meehl et al., 2007).

The globally averaged concentration of CO2 reached 400 parts per million, and the global average temperature climbed to more than 1 °C (1.8 °F) above pre-industrial levels.

The Thwaites Glacier alone is contributing about 10 % to the current globally averaged rate of sea level rise, which is about 0.13 inches per year, Joughin says.

Some locations, such as Brest, have measured a very slight acceleration in sea - level rise in the late 1800s or early 1900s, but globally averaged coastal sea - level rise has not accelerated since the 1920s.

However you slice it, lolwot, there is a current «pause» (or «standstill») in the warming of the «globally and annually averaged land and sea surface temperature anomaly» (used by IPCC to measure «global warming»), despite unabated human GHG emissions and CO2 levels (Mauna Loa) reaching record levels.

Over 1993 — 2014, the resulting globally averaged geocentric sea level change is 8 % smaller than the barystatic contribution.

Research published in Nature recommends that, globally, a third of oil reserves, half of gas reserves, and over 80 percent of current coal reserves should remain unused from 2010 to 2050, in order to keep average global temperatures from rising no more than two degrees Celsius above pre-industrial levels.

Empirical associations between solar - modulated cosmic ray ionization of the atmosphere and globally averaged low - level cloud cover remain ambiguous.

Globally averaged cloud cover anomalies from the ISCCP IR (blue line) and MODIS (green line) cloud monitoring programmes (values on left - hand axis), operational since 1983 and 2000 respectively for: (a) low - level (> 680 mb / 3.2 km), and (b) middle - to - high - level (< 680 mb / 3.2 km) cloud cover.

As it turns out, estimates of globally averaged sea level rise in the 20th century are irrelevant since Tuvalu's local sea level change is very different from the globally averaged change.

«Over 1993 - 2014, the resulting globally averaged geocentric sea level change is 8 % smaller than the barystatic contribution,» the researchers wrote in their study.

Our present approach of dealing with climate as completely specified by a single number, globally averaged surface temperature anomaly, that is forced by another single number, atmospheric CO2 levels, for example, clearly limits real understanding; so does the replacement of theory by model simulation.

It is virtually certain that globally averaged sea level has risen over the 20th century.

Taken together, the average of the warmest times during the middle Pliocene presents a view of the equilibrium state of a globally warmer world, in which atmospheric CO2 concentrations (estimated to be between 360 to 400 ppm) were likely higher than pre-industrial values (Raymo and Rau, 1992; Raymo et al., 1996), and in which geologic evidence and isotopes agree that sea level was at least 15 to 25 m above modern levels (Dowsett and Cronin, 1990; Shackleton et al., 1995), with correspondingly reduced ice sheets and lower continental aridity (Guo et al., 2004).

These feedbacks are the primary source of uncertainty in how much the earth will warm (side note: the question that most climate scientists who study the forcing due to CO2 try to answer is, how much will the long - term globally averaged surface temperature of the earth rise due to an rapid rise of CO2 to twice its industrial level, that is, 270 ppm to 540 ppm; it is currently about 380 last time I checked, and rising at ~ 3ppm / year, although this rate of change appears to be accelerating).

«Recently, various attempts using semi-empirical models have been proposed to estimate globally averaged sea level rise for the 21st century.