Temperature Increase
Global warming  Global warming is defined in this report as an increase in combined surface air and sea surface temperatures averaged over the globe and over a 30-year period expressed relative to the period 1850–1900, as pre-industrial temperatures (IPCC)  The ​20th century average often used as baseline is 1901-2000
Climate Emergency Institute

Global warming is higher :
>​​in the night-time than the day ​​(March 10, 2016
​>over land than over sea
  ​(sea surface temperature SST )
>​over central continents ​

>in the northern hemisphere         than southern and
> highest in the Arctic
  ​ ​​​(feedback amplification)
OCEANS Record high ocean heat is increasing at accelerating rate.

​​ 93% of added GHG heat has gone to the oceans, making 
ocean heat a much better single guide for assessment and mitigation than global surface warming. Global warming varies,with volcanic eruptions, El Nino La Nina phases, while ocean heat does not.

Baselines
​​20th century average ​is 1901-2000
Pre-industrial correction ​is 0.24°C​​
Copernicus 1991-2020​ add ​0.87°C​
Aspects of global warming 
​Global warming is average Land-ocean, the ocean having a cooling effect.
Global warming is the annual average.
Global warming average has been taken as a 30-year average, but WMO says a 10-yr average can be acceptable. ​​​

El Nino/La Nina
​Global tends to be higher in an El Nino phase and cooler in La Nina​​

Global summer warming would be more useful, for heat waves, wild-fires, drought
60 month average to 2023
from Copernicus

Northern hemisphere warming is much ​faster than the global average 
Arctic is fastest of all
​up to 4X global average.​

Sea surface is slowest cooling the global average.​
Causes for the big record 2023 warming 

1. Record atmospheric CO2, increasing faster than ever 
2. Record all atmospheric GHGs
3. El Nino​
4. Decline of cooling aerosol emissions -
     ​measures have been taken to further reduce fossil fuel
​      air pollution reducing air pollution sulfate cooling aerosols       
8th June 2023, Indicators of Global Climate Change 2022,M. Forster et al
Over the 2013–2022 period,human-induced warming has been increasing at an unprecedented rate of over 0.2°C per decade. This high rate of warming is caused by a combination of greenhouse gas emissions being at an all-time high over the last decade, as well as reductions in the strength of aerosol cooling. 
Global warming past 1000 years
2023 temperature highest
​in 125,000 years
Arctic temperature 
​The Arctic is now heating at twice the global rate as the science has said for years- From 1980 to 2021 its heated up to 4x as fast as the rest of the planet. That puts the Arctic amplifying feedbacks and tipping points coming on much faster.
​The Arctic holds more carbon, till recently safely frozen, than other region on the planet. Yes - another reason for immediate global emissions decline. 
Land (only) warming 2023 
Sea surface warming 2023 
Summer warming 2023
Northern hemisphere 2023 +1.84°C

We need to know warming in the summer 
for heat waves, wild fires and drought​
May 2024 Record of records 
May record at +1.52°C
12 record consecutive months
11 months above/at +1.5°C​​
Big Record 2023 +1.45°C
2023 ​global warming was a record by a record large margin,
​boosted by a powerful El Nino
WMO put it at 1.45°C
​​(climate centers varies slightly)

It was the highest global temperature
​in 125,000 years ​​​
Global warming is accelerating
even without big 2023 record​
​Global warming long term trend is acceleration
Recent global warming is accelerating
​(James Hansen confirmed by Gavin Schmidt 

Global warming Acceleration 
​Dr. Makiko Sato (NASA) ​Jan. 2024 ​
Industrial global warming is extremely rapid
​an abrupt global temperature increase 
More the 2023 record 
Clear acceleration
​Long & short terms
Global temperatures in the distant past 

​Global temperature is now very high with respect to past million of years 
Marine heat waves 
​Ocean marine heat waves are increasing  
2023 was a record​ for marine heat waves

On an average day in 2023, nearly one third of the global ocean was gripped by a marine heatwave, harming vital ecosystems and food systems. Towards the end of 2023, over 90% of the ocean had experienced heatwave conditions at some point during the year (WMO March 2024, State of Climate in 2023).​​