Earth’s climate, including its average surface temperature, depends on the balance between incoming and outgoing energy. Energy comes in to the system when sunlight penetrates the top of the atmosphere. Energy goes out in three ways: reflection by clouds, aerosols, or the Earth’s surface; (Snow/Sea Ice) and thermal radiation—heat emitted by the surface and the atmosphere, including clouds. The balance between incoming and outgoing energy is Earth’s net radiation. Net radiation is how much energy is available to influence the climate system—to melt ice, to raise temperatures, or to evaporate water from the oceans.
The Below maps of net radiation are based on observations collected by the Clouds and the Earth’s Radiant Energy System (CERES) sensors on NASA’s Terra and Aqua satellites. Places where the amounts of incoming and outgoing energy were in balance are yellow. Places where more energy was coming in than going out (positive net radation) are red. Places where more energy was going out than coming in (negative net radiation) are blue-green.
The maps illustrate how net radiation varies over the year at key months in the solar cycle. In the months of the solstices, December (top left) and June (bottom left), the tilt in Earth’s rotational axis has its strongest influence on the amount of sunlight reaching the ground in each hemisphere. One hemisphere is tipped its farthest away from the Sun, and other is tipped toward it. Net radiation is strongly positive across the Southern Hemisphere in December, and strongly negative across the Northern Hemisphere. In June, the pattern reverses.
During years of El Nińo heat is retained and distributed poleward away from the Equator via "ocean Transport" and Walker circulation pattern, This effects the Amount of loss of irradience (OLR) Or outgoing Longwave Radiation, Net amount retained vs loss.
Typically during June- September OHC during El Nińo sees negative OLR indicative of enhanced convection and more cloud cover, More convective activity in the central and eastern equatorial Pacific implies higher , colder cloud tops, which emit much less infrared radiation into space, warmer terrestrial temperatures are greatest in the 0-70°N as this is the largest land mass.
Moreover a loss in OHC at Equator would transpose in a greater loss of OLR to space and a loss of terrestrial temperature, given the SH winter this would reflect in a "plataue" or reduction in Global Temperatures.
Below OLR graph since 2016.
Notice more (loss) of OLR July-August reflects a cooler OHC along the Equatorial Pacific 5°N/S Global T remained at .38 above baseline for the period.
July & August were not the warmest Months on Record based on this Analysis.
Thanks for stopping by
David I Birch.
Citing Dr Roy Spencer - UAH temperature.
CERES-Tetra-Aqua satellite mapping.
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