Thread by @CelineGuivarch

So that you are ready when the @IPCC_CH WGIII report on mitigation is published, a short guide to “decode” the statements in the summary for policy makers, with an example from WGII summary. #AR6 #ClimateReport

Statements are numbered. SPM meaning summary for policy makers. The letter is the section of the summary. The first number corresponds to the headline statement (i.e. the key message). The second number is the more precise message supporting the headline statement.

Sentences are qualified with confidence statements (e.g. very high confidence). These confidence statements are based on the type, amount, quality, and consistency of evidence (e.g., mechanistic understanding, theory, data, models, expert judgment) and the degree of agreement.

At the end of statements, “line of sights” are given into brackets. They are the sections in the underlying report supporting the statement, for those who want to dig deeper.
Numbers (e.g. 1.2) refer to a section (2 in the example) in a chapter (1 in the example).

CWGB means Cross-Working Group Box. These are boxes where authors from several working groups have collaborated on a topic at the intersection of several WG. E.g. CWGB URBAN is a Box about urban systems at the intersection between adaptation and mitigation topics.

CCB means Cross-Chapter Box. It is the same as CWGB, except for topics at the intersection of several chapters’ topics.

SM means supplementary material. When the number of pages allocated to a chapter didn’t allow to provide all necessary material, some supplementary material is given.

SPM means summary for policy makers. In the example, they are summaries from WGI and from the special reports on the Ocean and Cryosphere in a changing climate (SROCC) and on Climate Change and Land (SRCCL).

Now, you are all set, ready read the summary when it is published. Stay tuned!