Sentences with phrase «year emission measurements»

When spring thaw emissions were combined with growing season emissions, the conventional tillage system actually had higher total nitrous oxide emissions than the zero till system.We suggest that this type of experiment (full year emission measurements) be repeated with deep banding of N fertilizer, which would be expected to further reduce emissions from zero till systems.

Not exact matches

It has been especially pro-active around the mitigation of carbon emissions and last year, along with the International Tourism Partnership (ITP) and 12 major hotel chains including Hilton, Hyatt, Marriott and Starwood, launched the Hotel Carbon Measurement Initiative, which aims to help hotels reduce, measure and communicate their carbon footprints.

The International Energy Agency first said two years ago that global energy - sector emissions had declined while the world expanded economically, though critics point out that the measurement excludes emissions from other sources, such as agriculture (ClimateWire, March 17).

In the new paper, published in the journal Environmental Research Letters, Höglund - Isaksson estimated global methane emissions from oil and gas systems in over 100 countries over a 32 - year period, using a variety of country - specific data ranging from reported volumes of associated gas to satellite imagery that can show flaring, as well as atmospheric measurements of ethane, a gas which is released along with methane and easier to link more directly to oil and gas activities.

A new study presents the first measurements of the changing strengths of oxygen emission lines from the present day and back to 12.5 billion years ago.

The study presents the first measurements of the changing strengths of oxygen emission lines from the present day and back to 12.5 billion years ago.

From his measurements, he calculates that the emissions have already increased to 620 metric tons in 2008, which is about 16 percent of the 4,000 metric tons that Prather estimates will be produced and used this year.

We find (i) measurements at all scales show that official inventories consistently underestimate actual CH4 [methane] emissions, with the natural gas and oil sectors as important contributors; (ii) many independent experiments suggest that a small number of «super-emitters» could be responsible for a large fraction of leakage; (iii) recent regional atmospheric studies with very high emissions rates are unlikely to be representative of typical natural gas system leakage rates; and (iv) assessments using 100 - year impact indicators show system - wide leakage is unlikely to be large enough to negate climate benefits of coal - to - natural gas substitution.

As NOAA's Mauna Loa measurement of atmospheric methane concentrations are only currently increasing at a rate of approximately 0.25 % per year (or 12.5 % change in 50 - years); how could anyone be concerned that the change in atmospheric methane burden in 50 - years could be 300 % (as per Isaken et al (2011) case 4XCH4; which would require an additional 0.80 GtCH4 / yr of methane emissions on top of the current rate of methane emissions of 0.54 GtCH4 / yr)?

The outcome is that every year since the Keeling measurements began in 1958, it is evident that 57 % of emissions have on average been UPtaken by the terrestrial and oceanic biospheres (Canadell et al. 2007, Table 1).

we use global - scale atmospheric CO2 measurements, CO2 emission inventories and their full range of uncertainties to calculate changes in global CO2 sources and sinks during the past 50 years.

(2) The observed inter hemispheric difference between the CO2 measurements at the Mauna Loa and the South Pole stations tracks beautifully the temporal increase and variation of the fossil fuel emissions over the last 55 years.

Scientists» measurements, over the last 30 years or so, seem to reflect a steady increase in CO2 emissions, which seem to be causing both a rise in temperature and change in ocean ph toward acidity.

Volcanoes put out only a very small amount of CO2 in comparison to our emissions, which is why CO2 levels were (using accepted measurements, not Beck's nutty ones) quite constant for the last ~ 10,000 years... and haven't been above ~ 300ppm in at least the last 750,000 years.

«At present, CSIRO and other measurements show that atmospheric carbon dioxide concentrations are rising progressively faster each year — so the judgement of the atmosphere is that global efforts to reduce emissions have so far been spectacularly unsuccessful.

And as said before, the ice cores measurements at one side and the emissions estimates for the period 1900 - 1960 indicates that nature was a net sink over that period, be it that in some years nature might have been a source, in other years a sink.

In addition to that the lacking warming during the recent 15 years can not be explained by any change of CO2 content in the atmosphere, there are evidences available according to which the changes of CO2 contents in the atmosphere are dominated by natural causes, where influence of anthropogenic CO2 emissions is so minimal that it can not be found by measurements in reality.

That is all what is needed to know what is happening with CO2 in nature, and that proves that nature was a net sink in the past 50 + years, even including the margins of error in the emission estimates and the CO2 measurements.

Another way to phrase the question is «Is there measurements that can be made in our lifetimes (I am 68 years old) that would bring you forward to publicly announce that the climate model - predicted planetary crisis alarm from human emissions was wrong and that the new data indicate that it was a mistake?».

AGW is a hypothesis that makes sense, namely: — GHGs absorb outgoing radiation, thereby contributing to warming (GH theory)-- CO2 is a GHG (as is water vapor plus some minor GHGs)-- CO2 concentrations have risen (mostly since measurements started in Mauna Loa in 1959)-- global temperature has risen since 1850 (in ~ 30 - year warming cycles with ~ 30 - year cycles of slight cooling in between)-- humans emit CO2 and other GHGs — ergo, human GHG emissions have very likely been a major contributor to higher GHG concentrations, very likely contributing to the observed warming

Using SCIAMACHY satellite data as well as ground - based measurements from 2003 to 2009, researchers found that the region where Arizona, New Mexico, Colorado, and Utah intersect had atmospheric methane concentrations equivalent to about 1.3 million pounds of emissions a year.

Using measurements from the first years of SCIAMACHY it had already been demonstrated prior to the start of this project that regional methane emissions can be well constrained via inverse modelling approaches.

This parallels a recent NOAA study of atmospheric methane measurements that found that «methane emissions from natural gas as a fraction of production have declined from approximately 8 per cent to approximately 2 per cent over the past three decades» — with production soaring in recent years.

Kasuha, I agree on that point: pH measurements with glass electrodes may have been accurate to 0.1 pH unit in the early days, while we are looking for a trend of 0.1 pH unit over (the first) 100 years of human emissions.

The one certainty about climate over the past 31 years is that there has been no enhanced greenhouse effect from GHG emissions as claimed by the IPCC Since 1979 satellite measurements of outgoing longwave radiation have not shown any decreasi in OLR from the increased insulation ascroibed to the enhanced greenhouse effect resulting from the increase in GHG emissions.

Measurements from Antarctic ice cores show that before industrial emissions started atmospheric CO2 mole fractions were about 280 parts per million (ppm), and stayed between 260 and 280 during the preceding ten thousand years.