Sentences with phrase «ghg emission projections»

For 2030, GHG emission projections (Kyoto gases) consistently show a 25 — 90 % increase compared to 2000, with more recent projections being higher than earlier ones (high agreement, much evidence).

By 2100, the range in the GHG emission projections is much wider from a 40 % reduction to an increase of 250 % compared to 2000.

Not exact matches

Future projections show that, for most scenarios assuming no additional GHG emission reduction policies, atmospheric concentrations of GHGs are expected to continue climbing for most if not all of the remainder of this century, with associated increases in average temperature.

The IPCC model projections of future warming based on the varios SRES and human emissions only (both GHG warming and aerosol cooling, but no natural influences) are shown in Figure 6.

Figure 3 accounts for the lower observed GHG emissions than in the IPCC BAU projection, and compares its «Best» adjusted projection with the observed global surface warming since 1990.

As this figure shows, even without accounting for the actual GHG emissions since 1990, the warming projections are consistent with the observations, within the margin of uncertainty.

For all three scenarios, top - down projections of energy consumption and production were put into LEAP to generate greenhouse gas (GHG) emissions across all sectors of the economy.

Annual Projected GHG Emissions (Mt CO2e) from Canada's Oil Sands, 2003 — 2020 (showing the range between low and high projections).

And the longer this «pause» in warming continues while GHG emissions continue unabated, the more «uncertain» become the model - based attribution estimates of IPCC and, hence, the projections for the future.

Parry et al. (2005) provide specific cereal yield projections for the 2020s and 2080s resulting from different GHG emission scenarios.

The steepness of these curves superimposed on actual national ghg emissions levels is an indication of the enormity of the challenge for the international community because the emissions reduction curves are much steeper than reductions that can be expected under projections of what current national commitments are likely to achieve if fully implemented.

The historical GHG emissions / removals data, used as reference for the projections data, are available for the base year, 1990, 1995, 2000, 2005, 2010 and 2011.

IPCC has made temperature projections for the end of this century based on continued human GHG emissions (principally CO2) over the next several decades.

Until methane leakage rates are scientifically determined, any ghg inventory or projection of future emissions should identify the range of leakage rates that appear in the extant literature.

When accounting for actual GHG emissions, the IPCC average «Best» model projection of 0.2 °C per decade is within the uncertainty range of the observed rate of warming (0.15 ± 0.08 °C) per decade since 1990.

In short: The FAR projections were not exact matches to observed history, but the models they used appear to be in the right range for predicting trends vs. GHG emissions.

If only half of observed warming were due to man, future warming could be roughly 50 % of the IPCCs projections, and the political objective of limiting warming to 2 degC would require much smaller (if any) reduction in GHG emissions.

To this date, there hasn't been a single GHG emissions climate projection, ever, that had physical meaning.

This is the kind of high - confidence AGW projection I would recommend to support current, but more rationally decided, government policy decisions regarding GHG emissions.

Many also question the scientific validity of the IPCC projections of future anthropogenic warming and its consequences, especially the IPCC premise that these are likely to result in serious negative impacts, i.e. a serious potential threat to humanity and our environment, unless actions are undertaken to curtail human GHG emissions (principally CO2).

Reliable GHG inventories are essential, both at national and international level, for: assessing the international community's collective and individual efforts to address climate change and progress toward meeting the ultimate objective of the Convention; evaluating mitigation options; assessing the effectiveness of policies and measures; making long - term emission projections; providing the foundation for emission trading schemes.

Also, I am missing a specific statement that acknowledges that the short - term warming projections of TAR (0.15 ° to 0.3 °C per decade) and AR4 (0.2 °C per decade) turned out to be wrong, i.e. there has been no warming since the end of 2000, despite unabated human GHG emissions and atmospheric concentrations reaching record levels.

Hi Giles, Does the report include projections on GHG emissions to 2030?

This is further complicated by some political rejection of science - based future climate projections and unwillingness to consider alternative economic development pathways to lowering the emission of carbon dioxide and other GHGs from the Human — Earth systems.

Emissions scenarios were converted to projections of atmospheric GHG and aerosol concentrations, radiative forcing of the climate, effects on regional climate, and climatic effects on global sea level (IPCC, 2001a).

Even more so with projections of catastrophic climate change, dangerous climate change, or even that GHG emissions will do more harm than good.