Sentences with phrase «include slow feedbacks»

First, most climate simulations, including ours above and those of IPCC [1], do not include slow feedbacks such as reduction of ice sheet size with global warming or release of greenhouse gases from thawing tundra.

DO NOT INCLUDE SLOW FEEDBACKS such as reduction of ice sheet size with global warming or release of greenhouse gases from thawing tundra.

Loking at the time period involved in most of Nics work I would say that his values do not likely include slow feedbacks..

However, we must include slow feedbacks in projections of warming for the 21st century and beyond.

Older models only included fast (Charney) feedbacks, more recent and complex ones do include some slow feedbacks (as far as I know; also note that new possibly significant feedbacks are being discovered all the time, making things... complicated).

However, we must include slow feedbacks in projections of warming for the 21st century and beyond.

First, most climate simulations, including ours above and those of IPCC [1], do not include slow feedbacks such as reduction of ice sheet size with global warming or release of greenhouse gases from thawing tundra.

All this discussion of the Schmittner et al paper should not distract from the point that Hansen and others (including RichardC in # 40 and William P in # 24) try to make: that there seems to be a significant risk that climate sensitivity could be on the higher end of the various ranges, especially if we include the slower feedbacks and take into account that these could kick in faster than generally assumed.

It seems to me we should use the higher values for climate sensitivity, including the slower feedbacks, for a complete assessment of risks upto the seventh generation, so to speak.

Chris, this just popped up and seems highly pertinent, although they don't (can't) calculate the complete (i.e. including all slow feedbacks) sensitivity calculation.

Is there a commonly used term for what James Hansen is referring to when he says Equilibrium Sensitivity [including slow feedbacks] is 6 C for doubled Co2 compared with 3 C for ECS only considering fast feedbacks.

Second, you can not directly compare the IPCC estimates of Charney sensitivity (which excludes slow feedbacks like ice sheets and vegetation) and earth system sensitivity (which includes slow feedbacks).

Climate sensitivity including slow feedbacks is described as «Earth system sensitivity» [118 — 120].

Snyder also uses the inferred record of global temperature to estimate equilibrium climate sensitivity including slow feedbacks, sometimes called ESS, suggesting that doubled CO2 (4 W / m2 forcing) would eventually cause global warming of 7 - 13C.

Not exact matches

Some climate scientists, including James E. Hansen, former head of the nasa Goddard Institute for Space Studies, say we must also consider slower feedbacks such as changes in the continental ice sheets.

«I think part of the reason slow feedbacks weren't included [in previous IPCC reports] was that they were assumed to be too slow to be relevant to human - induced climate change,» said Michael Previdi, lead author of the report.

The calculation above is for a long period of time and includes all the slow feedbacks, so I do not know why Hansen calls it a fast feedback.

Plotting GHG forcing (7) from ice core data (27) against temperature shows that global climate sensitivity including the slow surface albedo feedback is 1.5 °C per W / m2 or 6 °C for doubled CO2 (Fig. 2), twice as large as the Charney fast - feedback sensitivity.»

Slow feedbacks, such as change of ice sheet area and climate - driven changes of greenhouse gases, are not included.

Schools That Lead continue to refine their Teacher and Principal Leadership Initiatives to incorporate the lessons they have learned from the past three years, including being clearer about the development of an aim statement and theory of action, acknowledging the need to make room to do the improvement work, explicitly examining culture, paying attention to student feedback, starting small and moving slow, collecting and analyzing evidence to build warrant, and actively sharing the work — specifically the processes, results, and what worked and what did not work.

That feedback manifests itself in a number of ways including Lane Departure Warnings, Traffic Sign Recognition, Automatic High Beam Assist, Flank guard (helps with parking), Adaptive Cruise (which now brings the car to a stop instead of giving up when you slow down as it used to), Blind Spot Monitor, Closing Vehicle Sensing (which tells you when another car is bearing down on you quickly) and Reverse Traffic Detection.

Proposed explanations for the discrepancy include ocean — atmosphere coupling that is too weak in models, insufficient energy cascades from smaller to larger spatial and temporal scales, or that global climate models do not consider slow climate feedbacks related to the carbon cycle or interactions between ice sheets and climate.

Equilibrium sensitivity, including slower surface albedo feedbacks, is 6 °C for doubled CO2 for the range of climate states between glacial conditions and ice - free Antarctica.»

Further do we know from proxy records (corals) that the slow ice sheet feedback includes non-linear episodes, when ice sheets disintegrate and abruply cause SLR.

It does show that positive feedbacks are dominant, and for timescales of anthropogenic global warming about 2 to 4.5 degrees Celsius per doubling, and a bit higher if you include century - timescale «slower feedbacks» such as ice sheets.

And presumably it shows that the «slow» feedbacks which are not included in the Charney climate sensitivity roughly doubles the effect of the «fast» feedbacks which are.

The actual equilibrium, which may occur much later, must include both the «slow» and the «fast» feedbacks.

It is standard practice to include only the fast feedback processes, including changes in water vapour, in the calculation of climate sensitivity, but to exclude possible induced changes in the concentrations of other greenhouse gases (as well as other slow feedback processes).

The latter set of feedbacks, which include those due to ice sheet instability and the carbon cycle, are normally refered to as «slow feedbacks.»

These «slow feedbacks,» he says, include greenhouse - gas releases from ecosystems as forests die and permafrost melts.

DK12 used ocean heat content (OHC) data for the upper 700 meters of oceans to draw three main conclusions: 1) that the rate of OHC increase has slowed in recent years (the very short timeframe of 2002 to 2008), 2) that this is evidence for periods of «climate shifts», and 3) that the recent OHC data indicate that the net climate feedback is negative, which would mean that climate sensitivity (the total amount of global warming in response to a doubling of atmospheric CO2 levels, including feedbacks) is low.

Based on evidence from Earth's history, we suggest here that the relevant form of climate sensitivity in the Anthropocene (e.g. from which to base future greenhouse gas (GHG) stabilization targets) is the Earth system sensitivity including fast feedbacks from changes in water vapour, natural aerosols, clouds and sea ice, slower surface albedo feedbacks from changes in continental ice sheets and vegetation, and climate — GHG feedbacks from changes in natural (land and ocean) carbon sinks.

Some climate scientists, including James E. Hansen, former head of the nasa Goddard Institute for Space Studies, say we must also consider slower feedbacks such as changes in the continental ice sheets.

Because if you include the «slow feedbacks» that ECS leaves out you end up with double the amount of warming long - term.

We also include in the category of slow feedbacks the global warming spikes, or «hyperthermals», that have occurred a number of times in Earth's history during the course of slower global warming trends.

Excluding slow feedbacks was appropriate for simulations of the past century, because we know the ice sheets were stable then and our climate simulations used observed greenhouse gas amounts that included any contribution from slow feedbacks.

Figure 1: Schematic diagram of the equilibrium fast - feedback climate sensitivity and Earth system sensitivity that includes surface albedo slow feedbacks.

Recently there have been some studies and comments by a few climate scientists that based on the slowed global surface warming over the past decade, estimates of the Earth's overall equilibrium climate sensitivity (the total amount of global surface warming in response to the increased greenhouse effect from a doubling of atmospheric CO2, including amplifying and dampening feedbacks) may be a bit too high.

And if this process of water changing state, which is pretty much just a process of physics and a bit of chemistry, is so very easy to get wrong — specifically, is so easy to model too conservatively so the models predict wrongly that it will be a very slow process when in fact it seems to be a much faster process — how confident can we be that other models and estimates of processes that involve multiple feedbacks that include chemical and biological interactions as well as physical ones aren't even more wildly inaccurate on the «conservative» side?

The Insider program includes three levels of readiness known as «rings,» including Fast, Slow, and Release Preview, to allow developers and enthusiasts to get early access to upcoming features and improvements, to provide feedback to help shape the future of Windows 10.

Although it includes a lot of features, MIUI has suffered a lot of negative feedback from users and developers for being buggy, slow, and entirely different from Google's stock Android experience.