Sentences with phrase «use radiative transfer models»

In the following, after a description of the used radiative transfer model we show spectrally resolved typical simulations of atmospheric transmission and OLR for a standard atmospheric situation.

A look - up table of total transmittance at 415 nm is calculated using a radiative transfer model for a range of cloud water path, effective radius, optical depth, and solar zenith angles.

The simulations have been performed using the radiative transfer model MODTRAN.

Not exact matches

«I came to Berkeley Lab 21 years ago to work on supernova radiative - transfer modeling and now for the first time we've used these theoretical models to prove that we can do cosmology better,» says Nugent.

To do so, they used an existing model that describes radiative heat transfer as electrical currents flowing within two objects.

Combining these new images and photometry with ancilliary data from the literature, we undertook simultaneous multi-wavelength modelling of the discs» radial profiles and spectral energy distributions using three different methodologies: single annulus, modified black body, and a radiative transfer code.

This issue can however be avoided completely by using the actual radiative transfer model to examine climate model output, and that kind of approach was used in Hansen et al (2002) to show that the climate models can match the surface record, the MSU 2 channel and the MSU 4 channel completely consistently.

Since many of these processes result in non-symmetric time, location and temperature dependant feedbacks (eg water vapor, clouds, CO2 washout, condensation, ice formation, radiative and convective heat transfer etc) then how can a model that uses yearly average values for the forcings accurately reflect the results?

I would argue that if we use a simple radiative model with a variety of assumptions, no upper atmosphere cooling but only warming will occur with increased CO2 (see # 333), based on the radiative transfer equations and the Second Law of thermodynamics, but when other complexities are introduced, this might change.

In fact, the logarithmic nature of the climate forcing due to CO2 is built into the radiative transfer used in all IPCC climate models, and has been taken into account in climate models at least since the late 1950's.

The Abstract of Myhre et al states «Three radiative transfer models are used».

Radiative transfer models were never developed to estimate radiative forcing; they have entirely different, very practicRadiative transfer models were never developed to estimate radiative forcing; they have entirely different, very practicradiative forcing; they have entirely different, very practical, uses.

In these planetary GCMs, we use a relatively simple two - stream radiative transfer for scattering and absorbing atmospheres, with assumed diffuse incident of solar radiation at the top of the model domain.

Myhre et al tried to fool, the scientific world by simply stating that «Three radiative transfer models were used».

Pekka is trying to get around not admitting that Myhre et al never justified the use of radiative transfer models to estimate radiative forcing.

I pointed out that, so far as I could see, the authors had never justiified the use of radiative transfer models for the estimation of radiative forcing.

We use the GISS model of radiative transfer through the global atmosphere to try and break down the attribution using realistic distributions of local temperature, water vapor and clouds.

Radiative transfer models use fundamental physical equations and observations to translate this increased downward radiation into a radiative forcing, which effectively tells us how much increased energy is reaching the Earth'sRadiative transfer models use fundamental physical equations and observations to translate this increased downward radiation into a radiative forcing, which effectively tells us how much increased energy is reaching the Earth'sradiative forcing, which effectively tells us how much increased energy is reaching the Earth's surface.

Here, using fully coupled global climate model integrations, in addition to radiative transfer model calculations, the authors confirm the existence of such a negative RFTOA: INST over parts of Antarctica in response to an in - stantaneous quadrupling of CO2.

The SASBE could, for example, be used to constrain a radiative transfer model to provide top - of - the - atmosphere radiances with traceable uncertainty estimates.

This fast radiative transfer model developed and maintained by the NWP SAF is used by OSI SAF for SST retrieval

Let me once again illustrate this with the use of radiative transfer models to estimate the change in radiative forcing for a doubling of CO2.

For example, I go further back in the claims that CO2 causes global warming, to the use of radiative transfer models to estimate the change in radiative forcing for a doubling of CO2.

«Lewis in subsequent comments has claimed without evidence that land use was not properly included [viii] in our historical runs, and that there must be an error [ix] in the model radiative transfer.

Radiative transfer codes that accurately calculate the radiative impact of greenhouse gases and other atmospheric constituents are an essential component of the global climate models used to simulate present and futureRadiative transfer codes that accurately calculate the radiative impact of greenhouse gases and other atmospheric constituents are an essential component of the global climate models used to simulate present and futureradiative impact of greenhouse gases and other atmospheric constituents are an essential component of the global climate models used to simulate present and future climate.

The second strand is to quantify the signal also by looking at observations, by understanding the theory of radiative and convective heat transfer, and by using models subject to various kinds of forcing change.

It's also the case that the results for the radiative transfer equations will have a certain amount of error using «band models» compared with the «line by line» (LBL) codes for all trace gases.

There have been other studies using line - by - line radiative transfer models (see e.g., Myhre et al 1998) that come to the answer you give, which gives a simple approximation as ~ 5.35 ln (C / Co), where the units are now in W / m2 and C and Co are the final and initial CO2 concentrations.

If I were choosing a model to describe with as much quantitative fidelity as possible the greenhouse effect in the earth's atmosphere, then the model I would choose would be a state - of - the - art convective - radiative transfer code using the actual composition and empirical absorption / emission lines for the atmospheric constituents.

There is a very simple equation of radiative transfer which is used to illustrate the subject at a basic level and it is called the semi-grey model (or the Schwarzschild grey model).

The best of the radiative transfer band models used in climate models (e.g. RRTM, GISS) should also be doing this correctly.