Typical CERES measurement
Earth Energy Budget as derived by CERES
The objective of the CERES Project is to give instrumental evidence of Global Warming by satellite measurements of Earths Energy Budget in terms of
- average of absorbed solar radiation (ASR)
- emitted thermal radiation (ETR) to space
- from increases in atmospheric greenhouse gases (CO2, CH4, etc.) trapping more of the emitted thermal radiation from the surface, thereby reducing ETR and leading to a net gain of energy with ASR - ETR > 0.
- This is referred to as “Earth’s Energy Imbalance (EEI)”.
- Its magnitude is approximately 0.7 Wm2 (or 0.3% of ASR).
- Most of this excess energy (93%) is stored as heat in the ocean.
- The remainder warms the atmosphere and land, and melts snow and ice.
The Global Warming is thus measured to be approximately 0.7 W/m2 as 0.3% of ASR, which to be meaningful requires very high accuracy on the level of 0.1% or much less than 1 W/m2. Is this achieved?
Inspecting the Earth Energy Budget image above we see that Earth surface emits 398 W/m2 while it absorbs 164 W/m2 from the Sun, and 240 W/m2 is leaving the Earth-atmosphere system by LW radiation. We thus see an energy deficit of more than 200 W/m2 on the Earth surface and that the stated accuracy is not smaller than 1 W/m2.
We also see that the Earth Energy Budget includes massive back radiation from a colder atmosphere to a warmer Earth surface defying the 2nd Law of Thermodynamics.
The previous post addresses another questionable aspect of the energy(heat) flux data delivered by CERES with direct connection to accuracy, namely that CERES primarily through bolometers measures temperature and not heat flux as a derived computed quantity.
Altogether, CERES is used to deliver observational/instrumental support to Global Warming by atmospheric CO2, but the instrumental accuracy is way too small to give any evidence, and in addition the underlying physics contradicts the 2nd Law.
On the other hand, CERES can deliver information on the spatial distribution of ETR albeit at low accuracy.
- Climate is controlled by the amount of sunlight absorbed by Earth and the amount of infrared energy emitted to space.
- These quantities together with their difference define Earth’s radiation budget (ERB).
- The Clouds and the Earth’s Radiant Energy System (CERES) project provides satellite-based observations of ERB and clouds.
- It uses measurements from CERES instruments flying on several satellites along with data from many other instruments to produce a comprehensive set of ERB data products for climate, weather and applied science research.
with the following goals:
- Produce a long-term, integrated global climate data record for detecting decadal changes in the Earth’s radiation budget from the surface to the top-of-atmosphere.
- Enable improved understanding of how Earth’s radiation budget varies in time and space and the role that clouds and other atmospheric properties play.
- Support climate model evaluation and improvement through model-observation intercomparisons.
- Produce a long-term, integrated global climate data record for detecting decadal changes in the Earth’s radiation budget from the surface to the top-of-atmosphere.
Inlägg
Can't a cold mirror reflect infrared light back to a warmer body? (Re: 2nd law)
SvaraRaderaThe mirror cannot warm the body by reflection because warming requires a higher frequency than what the body can emit and that cannot be a reflected frequency.
SvaraRaderaThis is directly associated with my other comment:
SvaraRaderahttps://claesjohnson.blogspot.com/2022/11/why-you-cannot-heat-yourself-by-mirror.html?showComment=1670231567796
That Earth Energy Budget treats real-world graybody objects as if they're idealized blackbody objects. It's propaganda to advance their narrative. Nothing more.
They cannot get to 398 W m-2 surface radiant exitance (it used to be 390 W m-2) at their claimed surface temperature (which must be 289.44713740748324 K in this case) without treating the surface as though it were an idealized blackbody, with emissivity of 1 and emission to 0 K.
But the planet is not an idealized blackbody object. The NASA CCCP project showed emissivity to be 0.93643, and the planet's surface is not emitting to 0 K, it's emitting to an atmosphere far higher temperature than that. Only certain wavebands see the 2.735 K temperature of outer space (due to the infrared atmospheric window), and in fact space in the vicinity of our planet is ~283.32 K.
Using NASA's own emissivity, that gives a surface temperature of 294.2391309419401 K... or their surface radiant exitance number is wrong (hint: it is).
Using their own stated 255 K atmospheric temperature, surface temperature would have to be 329.0537315231714 K... or their surface radiant exitance number is wrong (hint: it is).
Given their own emissivity and atmospheric temperature, surface radiant exitance would have to be 140.78807265803968 W m-2 at their stated surface temperature of 288 K.
If we take that empirically-measured 283.32 K of space in the vicinity of the planet as the planet's average temperature, and assume the stated emissivity of 0.93643, emitting to the 2.735 K of outer space, we get 342.1293120507759 W m-2. But that would destroy their global warming narrative if the planet was nearly 5 K lower temperature than what they claim.