Sentences with phrase «anthropogenic atmospheric change»

In a world of anthropogenic atmospheric change, which sin requires more urgent attention: pride or sloth?

Not exact matches

The future impacts of anthropogenic global change on marine ecosystems are highly uncertain, but insights can be gained from past intervals of high atmospheric carbon dioxide partial pressure.

The continued increase in the atmospheric concentration of carbon dioxide due to anthropogenic emissions is predicted to lead to significant changes in climate1.

Here, we analyze a 28 - year record of tropical flower phenology in response to anthropogenic climate and atmospheric change.

Ongoing measurements of anthropogenic CO2, other gases and hydrographic parameters in these key marginal seas will provide information on changes in global oceanic CO2 uptake associated with the predicted increasing atmospheric CO2 and future global climate change.

Addressing these three broad areas of climate change research in reverse order: -(3) The anthropogenic origin of the rise in atmospheric CO2 levels is questioned because the levels of uncertainty of the size of natural fluxes within the carbon cycle are seen as too large for such a conclusion to be made.

Quote: Retired senior NASA atmospheric scientist, Dr. John S. Theon, 15th Jan 2009,» My own belief concerning anthropogenic climate change is that the models do not realistically simulate the climate system because there are many very important sub-grid scale processes that the models either replicate poorly or completely omit.

Seeing this as a baseline, positive CO2 feedback from temperature changes, or a running out of capacity for greater uptake from CO2 accumulation, would be seen as adding more CO2 to the air in addition to anthropogenic releases, but it would have to surpass some level before it would result in a total atmospheric accumulation of CO2 greater than anthropogenic emissions (first, as a rate, and later, cummulative change).

I doubt that anyone has an accurate gut feeling of what the mass ratio of anthropogenic atmospheric CO2 is to my car, or how ponderous the changes that CO2 will make will be.

It presents a significant reinterpretation of the region's recent climate change origins, showing that atmospheric conditions have changed substantially over the last century, that these changes are not likely related to historical anthropogenic and natural radiative forcing, and that dynamical mechanisms of interannual and multidecadal temperature variability can also apply to observed century - long trends.

Northeast Pacific coastal warming since 1900 is often ascribed to anthropogenic greenhouse forcing, whereas multidecadal temperature changes are widely interpreted in the framework of the Pacific Decadal Oscillation (PDO), which responds to regional atmospheric dynamics.

An economist with training in engineering and atmospheric physics, Meng uses past evidence to improve forecasts of a future under anthropogenic climate change.

Therefore, it is possible that some of the rise in atmospheric CO2 concentration and some of the change to the 13C: 12C atmospheric isotope change were due to the anthropogenic emission.

The change to the 12C: 13C isotope ratio of atmospheric CO2 is in the direction expected if the recent increase in atmospheric CO2 concentration were caused by the anthropogenic emission of CO2.

Therefore, it is possible that all of the rise in atmospheric CO2 concentration and all of the change to the 13C: 12C atmospheric isotope change were caused by the anthropogenic emission that induced the unknown, natural (i.e. non-anthropogenic) effect that caused the observed change to the 12C: 13C isotope ratio of atmospheric CO2.

The first is climate inertia — on very many levels, from fossil lock - in emissions (decades), ocean - atmospheric temperature inertia (yet more decades), Earth system temperature inertia (centuries to millennia) to ecological climate impact inertia (impacts becoming worse over time under a constant stress)-- all this to illustrate anthropogenic climate change, although already manifesting itself, is still very much an escalating problem for the future.

Simply, it is possible that none of the rise in atmospheric CO2 concentration and none of the change to the 13C: 12C atmospheric isotope change were caused by anthropogenic emission but were due to the unknown, natural (i.e. non-anthropogenic) effect that caused most of the change to the 12C: 13C isotope ratio of atmospheric CO2.

Richard S Courtney (00:08:00): The change to the 12C: 13C isotope ratio of atmospheric CO2 is in the direction expected if the recent increase in atmospheric CO2 concentration were caused by the anthropogenic emission of CO2.

Changes in atmospheric composition from human activities are the main cause of anthropogenic climate change by enhancing the greenhouse effect, although with important regional effects from aerosol particulates (IPCC 2007).

global warming, climate change, fossil fuel emissions, carbon isotopes, carbon 14, atmospheric co2, industrial revolution, fossil fuels, environment, save the planet, anthropogenic effects, human activity

By Amber Bentley (Aged 11) In just 16 pages, this wonderful book covers the structure of the atmosphere, solar radiation, the water cycle, clouds, fronts, convection, air pressure, air masses, the global atmospheric circulation, making weather observations, forecasting, synoptic charts, hurricanes, regional climate, palaeoclimates and anthropogenic climate change.

The sinks have a major influence on climate change and are important in understanding the link between anthropogenic CO2 emissions and atmospheric CO2 concentration.

C: increase in atmospheric CO2 from pre-industrial to present is anthropogenic (D / A) S: best guess for likely climate sensitivity (NUM) s: 2 - sigma range of S (NUM) a: ocean acidification will be a problem (D / A) L: expected sea level rise by 2100 in cm (all contributions)(NUM) B: climate change will be beneficial (D / A) R: CO2 emissions need to be reduced drastically by 2050 (D / A) T: technical advances will take care of any problems (D / A) r: the 20th century global temperature record is reliable (D / A) H: over the last 1000 years global temperature was hockey stick shaped (D / A) D: data has been intentionally distorted by scientist to support the idea of anthropogenic climate change (D / A) g: the CRU - mails are important for the science (D / A) G: the CRU - mails are important otherwise (D / A)

This presupposes that all of the atmospheric CO2 increase is of anthropogenic origin without regard to increases from non-anthropogenic sources such as changes in phytoplankton, volcanic eruptions, breakdown of methane emissions, deep ocean turnover, etc..

On the other hand, satellite - observed changes in absorbed sunlight and emitted heat in the tropics over the period 1985 - 2000, which appear to have caused a strengthening of the tropical atmospheric circulation, could in principle be either anthropogenic or natural in origin.

Because the NAO is primarily controlled by intrinsic atmospheric dynamics, it constitutes a major source of unpredictable natural variability whose impacts will be superimposed upon those of anthropogenic climate change.

* * * The evidence to support the theory of anthropogenic, or human - caused, climate change has been mounting since the mid-1950s, when atmospheric models predicted that growing levels of CO2 in the atmosphere would add to the natural «greenhouse effect» and lead to warming.

The second paper, by Hagos et al. (2016) examines changes to atmospheric river events over western North America, assuming a business - as - usual anthropogenic greenhouse gas emissions.

Originally denoted «climate change skeptics» or «anthropogenic (human - induced) global warming skeptics», the term referred to those who are as yet unconvinced by evidence that emissions of man - made CO2 significantly enhance the natural atmospheric greenhouse effect.

Climate Change Deniers, also known as Anthropogenic Global Warming (AGW) Deniers, refers to individuals or groups who disagree with the global scientific consensus that emissions of man - made CO2 significantly enhance the natural atmospheric greenhouse effect.

They concluded, «ocean pH does not simply reflect atmospheric CO2 trends but rather that circulation / biogeochemical changes account for > 90 % of pH variability in the Sargasso Sea and more variability in the last century than would be predicted from anthropogenic uptake of CO2 alone.»

Elsewhere researchers concluded that in addition to atmospheric pH, the complex interactions controlling pH especially in coastal zones, make detection of any trends towards acidification «not trivial and the attribution of these changes to anthropogenic CO2 emissions is even more problematic.»

How atmospheric and ocean circulation responds to various changes in forcing would need to be detailed if someone wanted to «prove» anthropogenic forcing is involved other than a minor increase in the average surface temperature.

Recognizing that the carbon cycle is very complex, so there are reasons that the simple comparison could be off (going either way of course), the chart suggests that only 20 % of the total anthropogenic CO2 emissions occurred in the same period where 50 % of the total change in atmospheric CO2 concentration were observed.

That «fingerprint» studies have proclaimed success at matching observed patterns of climate change with those projected by climate models run with anthropogenic atmospheric inputs — yet which omit black carbon — can only be a sign of overfitting.

Importantly, the scientists recognize that «atmospheric growth rates have deviated significantly from predictions of a linear model of atmospheric CO2 concentrations and anthropogenic emissions since 2002,» underscoring the imprecision of computer models for predicting climate change.

Methane is an important part of the anthropogenic radiative forcing Methane emissions have a direct GHG effect, and they effect atmospheric chemistry and stratospheric water vapour which have additional impacts natural feedbacks involving methane likely to be important in future — via wetland response to temperature / rain change, atmospheric chemistry and, yes, arctic sources There are large stores of carbon in the Arctic, some stored as hydrates, some potentially convertible to CH4 by anaerobic resporation [from wikianswers: Without oxygen.

But it demonstrates how changed equilibrium conditions could have had the observed recent effect on atmospheric CO2 concentration whether or not there was a change in temperature and whether or not the anthropogenic CO2 emission existed.

Temperature changes over time can be affected by various factors, including changes in Solar Radiation (SR) and in the Radiative Forcing (RF) attributable to rising atmospheric concentrations of anthropogenic greenhouse gases.

Changes in atmospheric composition and chemistry over the past century have affected, and those projected into the future will affect, the lifetimes of many greenhouse gases and thus alter the climate forcing of anthropogenic emissions:

Based on an extensive literature review, we suggest that (1) climate warming occurs with great uncertainty in the magnitude of the temperature increase; (2) both human activities and natural forces contribute to climate change, but their relative contributions are difficult to quantify; and (3) the dominant role of the increase in the atmospheric concentration of greenhouse gases (including CO2) in the global warming claimed by the Intergovernmental Panel on Climate Change (IPCC) is questioned by the scientific communities because of large uncertainties in the mechanisms of natural factors and anthropogenic activities and in the sources of the increased atmospheric CO2 concentrchange, but their relative contributions are difficult to quantify; and (3) the dominant role of the increase in the atmospheric concentration of greenhouse gases (including CO2) in the global warming claimed by the Intergovernmental Panel on Climate Change (IPCC) is questioned by the scientific communities because of large uncertainties in the mechanisms of natural factors and anthropogenic activities and in the sources of the increased atmospheric CO2 concentrChange (IPCC) is questioned by the scientific communities because of large uncertainties in the mechanisms of natural factors and anthropogenic activities and in the sources of the increased atmospheric CO2 concentration.

However, considerable evidence (8 ⇓ ⇓ — 11, 31 ⇓ — 33) simultaneously suggests that the response of northeastern Pacific atmospheric circulation to anthropogenic warming is likely to be complex and spatiotemporally inhomogeneous, and that changes in the atmospheric mean state may not be reflective of changes in the risk of extreme events (including atmospheric configurations conducive to precipitation extremes).

One recent modeling study indicates that the atmospheric circulation may respond abruptly to future anthropogenic climate change, at least in a simple climate model.

Uncertainty in these projections due to potential future climate change effects on the ocean carbon cycle (mainly through changes in temperature, ocean stratification and marine biological production and re-mineralization; see Box 7.3) are small compared to the direct effect of rising atmospheric CO2 from anthropogenic emissions.

Given the massive change in the rate of anthropogenic emissions over this period, it is difficult to conceive of how this would be possible if anthropogenic emission really was a dominant control on atmospheric concentration.

Obviously, in this formulation, A is the anthropogenic flux (well known), B is the natural flux (not easy to measure directly), and C is the net change in mass of atmospheric CO2 (well known).

This is but one of several possible scenarios whereby there is no change to sources and sinks and the increase to atmospheric CO2 being entirely natural and with the anthropogenic emission being irrelevant.

Theoretical and Applied Climatology covers climate modeling, climatic changes and climate forecasting, micro - to mesoclimate, applied meteorology as in agro - and forestmeteorology, biometeorology, building meteorology and atmospheric radiation problems as they relate to the biosphere; effects of anthropogenic and natural aerosols or gaseous trace constituents; hardware and software elements of meteorological measurements, including techniques of remote sensing, among other topics of current interest.

There is growing observational data, physical analysis of possible mechanisms, and model agreement that human - caused climate change is strengthening atmospheric circulation patterns in a way «which implies that the periodic and inevitable droughts California will experience will exhibit more severity...» «there is a traceable anthropogenic warming footprint in the enormous intensity of the anomalous ridge during winter 2013 — 2014 and the associated drought.»

There is evidence that some extremes have changed as a result of anthropogenic influences, including increases in atmospheric concentrations of greenhouse gases.