Changes in the Earth System, in turn, have
important feedback effects on the Human System, with costly and potentially serious consequences.
Changes in the Earth System, in turn, have
important feedback effects on the Human System, with costly and serious consequences.
Not exact matches
But it is
important to note that the essential note of
feedback is one of control -
effect.
Elisabeth Kruegar, Helmholtz Centre for Environmental Research (UFZ): «The World Water Scenarios Initiative can help raise awareness about where our behavior is leading to, and can also help to compare trends and different aspects of global change, like the drivers that they identified have an
effect on water, and also how water has an
effect on the drivers, the
feedback between both the drivers and impacts are
important.
Working with your health - care provider and providing
feedback is
important: «I'm having a lot of side
effects with this medication.»
Although positive
feedback from others is
important, how students interpret and process the
feedback ultimately determines its
effect on their self - esteem.
The Rossier research team, led by Center on Educational Governance researchers Drs. Dominic Brewer, Julie Marsh and Katharine Strunk, is tasked with evaluating the
effects of the Initiative on student and other
important outcomes and with providing
feedback to LAUSD and its partners to help them refine their processes.
As I read the abstract, it is saying that all existing climate models underestimate an
important feedback, the sea - ice albedo
effect.
For instance, the
effect of soot making snow and sea ice darker has a higher efficacy than an equivalent change in CO2 with the same forcing, mainly because there is a more
important ice - albedo
feedback in the soot case.
If the
effects of cloud
feedbacks are eliminated, this range is reduced to 1.7 - 2.3 C. 2 Many other
feedbacks, particularly those involving chemistry and biology, may also be
important.
Cloud variations are obviously an
important element on a global scale, but the
effects of Arctic ice melting are
important locally and also a non-trivial fraction of global albedo
feedbacks, which are a contributor to total
feedback that is smaller than those from water vapor and probably from cloud
feedbacks, but not insignificant.
Re: The Single Most
Important Point: yes, the ASSUMED positive
feedback effect is DOUBLE the
effect of CO2 alone, giving rise to a predicted warming 3 times that due to CO2 alone.
A substantial reduction in water vapor (shown below, from Lacis et al (2010) as well as increase in the surface albedo are
important feedbacks here, showing that removing the non-condensing greenhouse gases (mostly CO2) in the atmosphere can collapse nearly the entire terrestrial greenhouse
effect.
One
important feedback, which is thought to approximately double the direct heating
effect of carbon dioxide, involves water vapor, clouds and temperature.
Results of previously published empirical studies are used to demonstrate that the water vapor
feedback mechanism, so
important to the calculation of a significant climatic
effect for a doubling of the atmospheric CO2 concentration, appears to be counter-balanced by another
feedback mechanism of opposite sign.
As
important as assumptions about
feedbacks may be for climate models, it's
important not to allow the complexity of the system to
effect our interpretation of basic physics.
This (discussion of) a paper / theory suggests that water is indeed
important; it is a key in a negative
feedback cycle that locks the earth into a nearly constant total greenhouse
effect.
Most of the moisture is found below about 10,000 feet, so that is where the
effect of changes in lapse rate will be felt, and the
effect of an increase in moisture is to decrease the near - surface lapse rate, potentially resulting in an
important negative
feedback on radiative forcing.
The Ramanthan paper I found indicates that there may be some room for negative
feedback in water vapor in temperate tropospheres, but that «The excellent agreement in Figure 10, however, suggest that it is highly unlikely models are missing some potentially
important global scale water - vapor transport
effects...».
One
important determinant of how much climate will change is the
effect of so - called «
feedbacks» in the climate system, which can either dampen or amplify the initial
effect of human influences on temperature.
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.
That is, while the roles of water vapour and cloud
effects are very
important in the net greenhouse
effect, they function as
feedbacks rather than primary drivers of change.
Where water vapor is
important is as a
feedback effect... whereby the warming of the atmosphere due to increased CO2 causes the «equilibrium» concentration of water vapor to increase and this then enhances the warming because of water vapor's absorption of infrared radiation.
Firstly, it assumes linearity — all of the gases contributing according to their
effects today when it is obvious that overlaps and saturation
effects are large and
important, and more importantly, it ignores
feedbacks.
I think research on negative
feedbacks is very
important, because they could help lessen the warming
effect of GHGs.
Berkeley Lab researchers Dev Millstein and Surabi Menon found that atmospheric
feedback — such as changes in cloud cover or precipitation — does have an
important effect, resulting in different amounts of cooling in different cities, but that cool roofs and pavements are still beneficial for combating global warming.
I'm fine with most of that paragraph although I would contend that ACO2 does most of its irradiance absorption in the first 20ppm and then the
effects tail off significantly, what is most
important is not more ACO2 but the climate sensitivity to it and whether the
feedbacks are then positive or negative...
1) CO2 is not rising significantly compared to earlier in the 20th century (Beck, Segalstad, Jaworowski) 2) OK, so CO2 is rising, but human sources are but a minor player (Howard Hayden, Spencer on WUWT) 3) OK, so human CO2 is significant, but its temperature
effect is nonexistant (Heinz Hug) 4) OK, so CO2 has a temperature
effect, but it is dwarfed by water vapour (Lindzen, Reid Bryson, Tim Ball 5) OK, so the CO2 temperature
effect is not completely dwarfed by water vapour, but the sun is much more
important (Svensmark, Shaviv, many others) 6) OK, so the solar output has been flat since the 50ies, but there are no net positive
feedback (Lindzen again, Spencer again) 7) Actually, there has been no significant global warming (Watts, Singer + more), 8) Hey, all this warming is a) unstoppable anyway (Singer again) b) good for humanity (Michaels).