Volcanism is another key driver of historical climate changes, and we have
compared the modeled response to large volcanic eruptions with historical data as well.
Therefore, in a subsequent MAGICC run we replaced our ice core — based reconstruction with Sato's [Sato et al., 1993](and updated to present) values after 1970 and
compared the model response to NH temperature reconstructions [Intergovernmental Panel on Climate Change, 2007, Figure 6.10] for the past millennium (Figure 4).
Not exact matches
When the team
compared their results to previously published clinical and genomic data, they found that their
model successfully predicted patients» chemotherapy
response more than 80 percent of the time.
Lee's research team and collaborators in South Korea then used computer
models of brain activity to
compare stimulus
responses of fibromyalgia patients to the normal condition.
«We
compared the ability of RSV and parainfluenza virus (PIV3)-- another common virus in children that causes much less severe airway disease — to infect and cause inflammatory
responses in a cell culture
model of human epithelial cells, which compose the lining of the lung airway.
«These results suggest that oxytocin might be particularly effective in females — something we would not have observed just looking at the male mice,» says Moy, who is now
comparing oxytocin
responses across sexes in other autism
models.
With this in vivo
model, the research team uncovered evidence of distinct organellar perturbations in redox balance following inhibition of GSH synthesis with buthionine sulfoximine, demonstrating increased mitochondrial oxidation in
response to GSH depletion
compared to the cytosol.
We find that a single administration of the MN patch induces robust immune
responses in a B16F10 mouse melanoma
model compared to MN without degradation trigger or intratumoral injection of free aPD1 with the same dose.
We sought to
compare the signaling and functional effects that result from deletion of DGKζ, Cbl - b, or both (double knockout) in T cells and to evaluate tumor
responses generated in a clinically relevant orthotopic pancreatic tumor
model.
Furthermore, other measurement and
model studies
comparing the
response of mid-range vs. high ozone values show that the ozone decreases in the US and Europe are more pronounced for the highest ozone values, while sites in China show ozone increases for both mid-range and high ozone values (Derwent et al., 2010; Simon et al., 2015; Lefohn et al., 2017b).
See the Hadcm3
model response to aerosols here, and
compare that to the Canadian
model Fig. 2 fa and Ta and fig. 3, the Japanese
model href =» http://cfors.riam.kyushu-u.ac.jp/~toshi/research.html» > Fig. 3, Hansen ea.
Students complete activities
compare their exam question
responses with
model answers.
They are professionally finished, and handwritten
model answers accompany the questions for students to
compare their
responses against.
The addition of a turbo means the car has more torque and much better throttle
response compared with previous
models.
The direct
response to the accelerator pedal is impressive when
compared either with conventional 7 Series
models or existing hybrid vehicles already in the market.
«By
comparing the
response of clouds and water vapor to ENSO forcing in nature with that in AMIP simulations by some leading climate
models, an earlier evaluation of tropical cloud and water vapor feedbacks has revealed two common biases in the
models: (1) an underestimate of the strength of the negative cloud albedo feedback and (2) an overestimate of the positive feedback from the greenhouse effect of water vapor.
[
Response: There are numerous detailed discussions already available on this site
comparing modeled and reconstructed hemispheric temperature variations over the past 1000 years.
Instead, the
model results for, say, the mean climate, or the change in recent decades or the seasonal cycle or
response to El Niño events, are
compared to the equivalent analyses in the gridded observations.
Greenland as an high altitude inlandsis seems to be very special
compared to these regions, and probably has more inertia towards meting, as the center isolated from sea influence and accumulate ice form increasing precipitations.I don't really remenber what
models predict in Greenland, but it doesn't confuse me if the
response is not temporally and geographically the same as other regions.
[
Response: Because ENSO is a huge signal
compared to the trends and so the structure of the last 25 years is quite sensitive to where any
model El Ninos occur.
More interestingly, in
response to the second referee's objection that older SRES scenarios were used instead of the new RCP scenarios, Hansen replied: «Our paper
compares observations (thus the past) and
models, thus only deals with the past.
[
Response # 2: The standard for
comparing responses across different
models is to look at the radiative forcing at the top of the atmosphere — for 2xCO2 it is around 4 W / m2 (read the new National Academies report on this for a much more detailed discussion of the concept).
See the Hadcm3
model response to aerosols here, and
compare that to the Canadian
model Fig. 2 fa and Ta and fig. 3, the Japanese
model href =» http://cfors.riam.kyushu-u.ac.jp/~toshi/research.html» > Fig. 3, Hansen ea.
When
comparing with alternative
models of plant physiological processes, we find that the largest uncertainties are associated with plant physiological
responses, and then with future emissions scenarios.
In this approach based on detection and attribution methods, which is
compared with other approaches for producing probabilistic projections in Section 10.5.4.5, different scaling factors are applied to the greenhouse gases and to the
response to other anthropogenic forcings (notably aerosols); these separate scaling factors are used to account for possible errors in the
models and aerosol forcing.
However, if the GCM is also ocean coupled, then the
response might differ, as the temperature
response from CO2 is then coupled to a large, circulating mass of water with high SHC, which may effectively act as a buffer or lag
response if
compared to a 0 - D
model.
Because GISS
Model E-R incorporates the
response of these proxies in its output, the authors of the PNAS study were able to
compare their results directly to the historical record.
This paper covers the historical experiments —
comparing model results from 850-2005 to observations and proxy reconstructions — as well as some idealized experiments designed to measure metrics such as climate sensitivity, transient climate
response, and carbon cycle feedbacks.
Since there are some differences in the climate changes simulated by various
models even if the same forcing scenario is used, the
models are
compared to assess the uncertainties in the
responses.
«Causes of differences in
model and satellite tropospheric warming rates» «
Comparing tropospheric warming in climate
models and satellite data» «Robust comparison of climate
models with observations using blended land air and ocean sea surface temperatures» «Coverage bias in the HadCRUT4 temperature series and its impact on recent temperature trends» «Reconciling warming trends» «Natural variability, radiative forcing and climate
response in the recent hiatus reconciled» «Reconciling controversies about the «global warming hiatus»»
In
response to claims that CO2 had driven the recent California droughts, this segment
compares CO2 driven
models vs the effects of La Nina and the negative Pacific Decadal Oscillation
In the figure above, you'll notice that the CCC
model that Boer is focusing on has the weakest
response of precipitation
compared to the other
models.
In a new paper by Saba et al., they
compare simulations and an atmospheric CO2 doubling
response from four NOAA Geophysical Fluid Dynamics Laboratory (GFDL) global climate
models of varying ocean and atmosphere resolution.
Modeled response of the atmospheric CO2 concentration (panel b) and surface air temperature
compared to the year 2000 (panel c) to prescribed CO2 emissions (panel a).
Vegetation / ecosystem
modelling and analysis project:
comparing biogeography and biogeochemistry
models in a continental - scale study of terrestrial
responses to climate change and CO2 doubling.
«In
response to those who complained in my recent post that linear trends are not a good way to
compare the
models to observations (even though the modelers have claimed that it's the long - term behavior of the
models we should focus on, not individual years), here are running 5 - year averages for the tropical tropospheric temperature,
models versus observations...»
Cartoon
comparing (a) Fi, instantaneous forcing, (b) Fa, adjusted forcing, which allows stratospheric temperature to adjust, (c) Fg, fixed Tg forcing, which allows atmospheric temperature to adjust, (d) Fs, fixed SST forcing, which allows atmospheric temperature and land temperature to adjust, and (e) DTs, global surface air temperature calculated by the climate
model in
response to the climate forcing agent.»
On this note, one of the latest papers in this area is Weijer et al. (2012)(link goes to e-print), which
compares the MOC
response in the IPCC - class ocean
model POP to the
response in a higher - resolution (0.1 degree) strongly - eddying version of POP.
First, you note that a factor needs to be applied to the volcanic
response when you predict temperature from the forcing inputs: - «When I lag the forcings, using an efficacy of 1 for all forcings except volcanic and a volcanic efficacy of 0.75, I get an R ^ 2 of 0.98 when
compared to the GISS
model output.»
(3) It is much easier to validate aerodynamic
models: experiments can be performed, parameters tweaked and
responses noted and
compared to predicted behavior.
It's got a much lower latency
compared to the earlier
models, which means the
response under the finger is a lot more impressive.