CERES_EBAF_Ed4.0 TOA

Data from:
Data Quality Summary (February 3, 2017) and
CERES Science Team Meeting presentations (2016)

Data Set Version: Edition4.0
CERES Visualization, Ordering and Subsetting Tool: http://ceres.larc.nasa.gov/order_data.php

Ed2.8 - Ed4.0 comparison (DQS Table 6-1)



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Known ~4.2 W/m2 bias in net balance:




From Data Quality Summary TOA Ed4.0:




See also

 


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Kato el al. 2016:






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Uncertainties (all-sky, clear-sky) from Wild (2016):




* * *





There is no documented known general planetary energy budget contraint
that connects the surface energy budget to the TOA fluxes.

The known constraints are these (from the NASA LaRC website):



*
Surface energy budget equation, according to
TOA data from Ed4.0, surface data from Ed4 SYN1deg, Kato 2016:

E(SFC, clear) = SW down - SW up + LW down = LW up + turbulent + imbalance

242.6.0 - 28.4 + 317.6 = 214.2 + 317.6 = 
397.1 + 134.0 + 0.7 = 531.8 W/m2 

OLR(clear) = 268.0 W/m2
Diff: 2 × 268.0 - 531.8 = 4.2 W/m2

Apart from the 4.2 W/m2 deliberate adjustment,
the equality is exact.

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In the all-sky mean,

E(SFC, all) = SW down - SW up + LW down = LW up + turbulent + imbalance

184.0 - 22.5 + 347.1 =
161.5 + 347.1 =
397.8 + 110.1 + 0.7 = 508.6 W/m2 

OLR(all) = 240.1
LW CRE = 28.0

2OLR(all) + LW CRE = 508.2 W/m2

Diff = IMB = 0.4 W/m2



E(SFC, clear) = 2OLR(clear)   (+ TOA flux adjustment)

E(SFC, all) = 2OLR(all) + LW CRE  (+ IMB)




Estimated surface error: ± 4 - 7 W/m2

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In the Earth's system the

E(SFC, clear) = 2OLR(clear)

and

E(SFC, all) = 2OLR(all) + LW CRE

constraints are as strong, accurate and necessary as the known
energy in = energy out global balance equations.
 


* * *

It is evident that the Martian clear atmosphere satisfies the said known equations:

But it is also evident that the Martian surface energy budget does NOT satisfy the 2OLR-constraint:

E(SFC, Mars, clear) = 96 + 27 = 123 W/m2

SW abs + LW abs << 2OLR(clear),


and does NOT satisfy the resulting atmospheric energy balance equation:

SW abs + LW abs = LW emitted up + LW emitted down 

14 + 33 = 20 + 27 = 47 W/m2 << 2OLR.

* * *

The surface constraint for Earth results in this atmospheric equation
(our textbox added to Stephens et al. 2012):




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Theoretical mean state for

ALL SKY:

OLR(all) = 9 = 340.0 - 99.1 = 240.1 W/m2
with UNIT = 1 = 26.67

FluxUNITW/m2
Surface SW abs6160.1
Surface LW down13346.8
Surface LW up15 400.16
Surface net4106.7
E(SRF, all)19 506.87
OLR(all)9240.1
LW CRE 126.67
2OLR(all) + LWCRE19506.87


CLEAR SKY:

Surface SW abs8213.4
Surface LW down12320.0
Surface LW up15 400.16
Surface net5133.3
E(SRF, clear)20 533.33
OLR(clear)10266.67
2OLR(clear)20533.33


* * *

LW CRE Ed2.8 = 265.4 - 239.6 = 25.8 W/m2

LW CRE Ed4.0 = 268.1 - 240.1 = 28.0 W/m2

We will often refer to LW CRE throughout this website as "UNIT",

with a value of UNIT = 26.6 W/m2, 26.67 W/m2 or 26.7 W/m2,

which is the LW effect of an IR-opaque effective single-layer cloud cover,
close to the arithmetic mean of these two estimates.

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More when EBAF Surface Ed4.0 becomes available
(2017 April)

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