อนุทิน 174494

MJO and OLR ทำอากาศร้อน?

Madden Julian Oscillation (MJO) : an eastward moving ‘pulse’ of cloud and rainfall near the equator that typically recurs every 30 to 60 days.

–The current MJO is moving in a circle (instead of eastward) over an equatorial region covering the (east of) Indian Ocean and the (west of) Pacific Ocean (see http://www.bom.gov.au/climate/mjo/ ).

Outgoing longwave radiation (OLR): a (natural) process of cooling/losing heat by radiation (without the need for ‘heat conductor’). Our Earth is heated up by ‘shortwave radiation’ (in visible near-infrared and ultraviolet lights; nm wavelength) which can go through clouds. But is cooling by radiating (invisble mostly infrared and far-infrared; 4-100 microns wavelength) ‘longwave’ radiation which is blocked and reflected by clouds back to Earth. This is commonly known as ‘the greenhouse effect’.

As we (human thru heat engines) heat up the Earth on top of what we receive from the sun, beyond our cooling system (OLR) capacity, and on top of that MJO is circling cloud covers over the region, we get extreme hot weather in places and extreme rain storms in places. Somewhat like ‘boiling’?

[Added 9/5/2567] “Plan B for Planet Earth ” : แผนสองสำหรับโลก https://thaipublica.org/2024/05/veerathai-54-plan-b-for-planet-earth/