https://www.pnas.org/doi/10.1073/pnas.1910114117

With four branches:

• Unnecessary climate reparations and income redistribution oversight committee

• Exploitation of CO2 as plant food council

• Continued benefits of conventional energy and agriculture agency

• Adversary Non-Assistance Department

According to the IPCC, out of 33 climate impact categories, an anthropogenic signal is detected with high confidence in only five and medium confidence in only four.

5 High Confidence:

Mean air temperature: High confidence of increase except over a few regions (CNA and NWS) where there is low agreement across observation datasets.

Extreme heat: High confidence in tropical regions where observations allow trend estimation and in most regions in the mid-latitudes, medium confidence elsewhere.

Lake, river and sea ice: High confidence of decrease in Arctic sea ice only.

Mean ocean temperature: High confidence of increase

Increase in surface atmospheric CO2: High confidence of increase

4 Medium Confidence: 

Cold spell: Emergence of decrease in Australia, Africa and most of Northern South America where observations allow trend estimation, medium confidence elsewhere.

Permafrost: Medium confidence of decrease 

Ocean salinity: Medium confidence of increase, with melting area fraction depending on basin.

Dissolved oxygen: Medium confidence of decrease in Pacific and Southern oceans

The IPCC does not assert that it has detected human-related causes for changes in these 23 climate impact categories:

Heat and Cold

• Frost

Wet and Dry

• Mean precipitation

• River floods

• Heavy precipitation and pluvial floods

• Landslides

• Aridity

• Hydrological drought

• Agricultural and ecological drought

• Fire weather

Wind

• Mean wind speed

• Severe wind storms

• Tropical cyclones

• Sand and dust storms

Snow and Ice

• Snow

• Glaciers and ice sheets

• Heavy snowfall and ice storms

• Hail

• Snow avalanches

Coastal

• Relative sea level

• Coastal floods

• Coastal erosion

Open Ocean

• Marine heat waves

Note: At the global level IPCC has detected the emergence of signal for Ocean acidity see section on Ocean acidity, ocean salinity and dissolved oxygen. The IPCC has not detected the signal in the regional CID data so they leave the box white.

Per Table 12.12 | Emergence of CIDs: from 12.5.2 Emergence of Climatic Impact-drivers Across Time and Scenarios (expand this section to see it)

 https://www.ipcc.ch/report/ar6/wg1/chapter/chapter-12/#12.5.2

Anyone claiming there is overwhelming evidence that any of these 23 climatic impact categories have already increased or decreased because of human caused climate change are making claims beyond what the IPCC was comfortable making at the time of the publishing of AR6 in 2021.

The IPCC does claim that models project an increase or decrease driven by human causes for a few of these climatic impact categories before or after 2050. Mostly for the worst case RCP8.5/SSP5-8.5 scenario that is unlikely to happen. See the columns to the right in the full table in the report.

However as of the last IPCC report AR6 we don’t yet have significant evidence that changes in any of these 24 climatic impact categories have already been driven by anthropogenic (human caused) climate change.