Sentences with phrase «oceanic sources»

US CLIVAR is collaborating with the ocean carbon and biogeochemistry science community to increase observations and understanding of the coupled physical / biogeochemical processes that maintain the marine ecosystem and oceanic sources and sinks of carbon and predict how they will evolve in response to climate variability and change.

What are the long - term trends and year - to - year variations in the terrestrial and oceanic sources and sinks of greenhouse gases?

Urban emissions alone produce a peak maximum DMS concentration of only 0.1 % of that seen from oceanic sources.

I do, however, recognize the point of your suggestion that year to year fluctuations in the rate of CO2 change can involve flux changes between atmospheric and terrestrial or oceanic sources that add to or subtract from the human contribution.

We use the13C / 12C ratio of atmospheric CO2 to distinguish the effects of interannual variations in biospheric and oceanic sources and sinks of carbon.

«Based on our observations in the sea - surface microlayer, we think that this could be very important as it may imply a positive feedback on atmospheric CO2 from oceanic sources, that is, from microbial metabolism at the air - sea interface.»

A study under the auspices of University of Alaska Fairbanks doubles estimates of methane released from an important oceanic source which may be «leaking» the potent global warming gas as permafrost melts.

Not exact matches

I became an oceanic mass of space, an infinite and free - flowing source of energy without divides or means of categorisation.

The tagged animals traveled to and took measurements from a fourth known source of bottom water, a crucial oceanic heat sink

Academics and companies are also striving to improve processed shrimp feed and replace the fish meal it contains with other protein sources, a change that could help prevent further depletion of fish species at the base of oceanic food webs.

ref Specifically, reducing land - based sources of pollution (nutrient runoff and sedimentation) has been identified as an important approach to address acidification in coastal waters because nutrients like phosphorus and nitrogen and land - based carbon inputs can increase the acidity of coastal and oceanic waters.

Marine life is dying, and as a result the whole oceanic ecosystem is threatened simply by various sources of pollution.

Plant oils, particularly seed and nut oils, contain ALA. [43] Food sources of EPA and DHA are oceanic fish, whereas dietary supplement sources include fish oil, krill oil and marine algae extracts.

Changes here have a long term effect, affecting the strength of the north - ward horizontal flow of the Atlantic's upper warm layer, thereby altering the oceanic poleward heat transport and the distribution of sea surface temperature (SST — AMO), the presumed source of the (climate) natural variability.

This rise may have been eustatically controlled, possibly through a combination of thermal expansion of the oceanic water column and melting of unknown sources of high - altitude or polar ice caps in response to global warming.»

For example: could different oceanic circulation rates change the oceanic CO2 sink / source behaviour, or could different atmospheric conditions change the mixing rates of atmospheric gases hence modify their affect on the solar forcing?

The oceanic heat store should be regarded as an additional heat source that adds or subtracts the effect of earlier solar irradiance (or lack of it) to or from the present day effect of current solar irradiance.

The oceanic heat store should be regarded as an additional heat source that adds or subtracts the effect of earlier solar irradiance (or lack of it) to or from the present day effect of current solar irradiance over variable periods of time.

In the initiating region there would be a net flux from the internal source (presumably oceanic) into the atmosphere and out through TOA (local negative feedback) and the reverse of this in the larger responding region.

The relationships between atmospheric CO2ppmv increase, the del C13 signatures of current atmospheric (and oceanic (dissolved) «CO2 ″), the del C13 signatures of oil, coal, and wood, and the estimates of anthropogenic CO2 production since 1850, all indicate that the ~ 110ppmv atmospheric CO2 increase since then has a «non-natural», i.e. anthropogenic source, even though the biosphere is absorbing approximately 55 % of the total anthropogenic CO2 production.

KR @ 239, thank you again though your reply appears limited — volcanoes are never a good example but possible CO2 sources from deep oceanic turnover, bacteria, soils, methane breakdown, reduced phytoplankton might be quite significant if we assume the mass balance equation to cover a range of variables and a range of fluxes over a period of time.

New evidence shows that the ocean also acts as a source of organic matter from biogenic origin -LSB-...] Surface - active organic matter of biogenic origin -LSB-...] enriched in the oceanic surface layer and transferred to the atmosphere by bubble - bursting processes, are the most likely candidates to contribute to the observed organic fraction in marine aerosol.

BTW, this is another reason to eliminate oceanic CO2 outgassing from warming as a source of atmospheric changes, this (expected eventually) effect also takes centuries.

Have Z & C considered the fact that MLO lies in the exhaust plume of massive oceanic outgassing in the Eastern Equatorial Pacific, and that Keeling cautioned against relying on measurements near sources or sinks?

It might reflect, at least in part, a natural source - sink pattern of oceanic CO2 fluxes (Keeling et al., 1989; Broecker and Peng, 1992).

Until we can see Selby's slides, Tom V. Segalstad presented similar material from earlier sources: Carbon isotope mass balance modelling of atmospheric vs. oceanic CO2 Tom V. Segalstad, Heartland Institute ICCC 2009

Some caution is necessary in implicating the tropical Pacific and North Atlantic as the primary sources of oceanic - forced variability in the global mean temperature.

Such concerns, however, are tangential to the global mean temperature signature of oceanic natural variability, which is robust and independent of spatial correlations that might obscure the identification of the precise geographical source of such variability.

Setting aside oceanic O2 and other O2 sources and sinks (H escape to space, ferrous Fe, geologic organic (or elemental?)

With reference to Stephen Schneider's The worst - case scenario, my readings of recent geology research suggests that the actual worst case is a replay of the oceanic anoxic events (nice summary that extends the wiki article) that appear to be associated not only with most mass extinctions in the geologic record, but also with the conditions permitting the deposition of most petroleum source rocks.

I have tried a little test at my terrestrial ecology section (I'm a biologist), and every single student I have asked who were just passingly familiar with the carbon cycle, sources and sinks and basic isotopic facts, has immediately been able to point out the obvious weaknesses (e.g. «if the atmospheric CO2 rise came from oceanic outgassing, then why has oceanic CO2 risen too»?).

Seasonal forecasting of East Asian summer monsoon based on oceanic heat sources.

Other sources of lag could be the time required for the ocean to mix vertically, for sea - ice to melt, for oceanic biological productivity to change, and / or for the concentrations of atmospheric dust to change («Timing of Atmospheric CO2 and Antarctic Temperature Changes Across Termination III», Science Magazine # 299).

Based on recent research, Willoughby said, it is likely that «the strongest hurricanes will get stronger, because the oceanic heat source is stronger, but because of increased shear of the surrounding winds, the numbers will go down, and the locus of activity in the Atlantic is more likely to move to the open Atlantic from the Gulf [of Mexico].»

Topics that I work on or plan to work in the future include studies of: + missing aerosol species and sources, such as the primary oceanic aerosols and their importance on the remote marine atmosphere, the in - cloud and aerosol water aqueous formation of organic aerosols that can lead to brown carbon formation, the primary terrestrial biological particles, and the organic nitrogen + missing aerosol parameterizations, such as the effect of aerosol mixing on cloud condensation nuclei and aerosol absorption, the semi-volatility of primary organic aerosols, the importance of in - canopy processes on natural terrestrial aerosol and aerosol precursor sources, and the mineral dust iron solubility and bioavailability + the change of aerosol burden and its spatiotemporal distribution, especially with regard to its role and importance on gas - phase chemistry via photolysis rates changes and heterogeneous reactions in the atmosphere, as well as their effect on key gas - phase species like ozone + the physical and optical properties of aerosols, which affect aerosol transport, lifetime, and light scattering and absorption, with the latter being very sensitive to the vertical distribution of absorbing aerosols + aerosol - cloud interactions, which include cloud activation, the aerosol indirect effect and the impact of clouds on aerosol removal + changes on climate and feedbacks related with all these topics In order to understand the climate system as a whole, improve the aerosol representation in the GISS ModelE2 and contribute to future IPCC climate change assessments and CMIP activities, I am also interested in understanding the importance of natural and anthropogenic aerosol changes in the atmosphere on the terrestrial biosphere, the ocean and climate.