| Working Group 1: scientific basis | september 2013 |
| Working Group 2: impacts, adaptation, vulnerability | march 2014 |
| Working Group 3: mitigation of climate change | april 2014 |
| Synthesis Report | october 2014 |
| Event | WG 1 | WG 2 | WG 3 |
| experts and governments prepare scoping document | 2009 | 2009 | 2009 |
| governments approve scoping document in a plenary meeting | '09 | '09 | '09 |
| governments & organisations nominate lead authors and review editors | mar '10 | mar '10 | mar '10 |
| IPCC-bureau selects core writing team | may '10 | may '10 | may '10 |
| announcement of core writing team | jun '10 | jun '10 | jun '10 |
| first lead author meeting (LA1) | 8-11 nov '10 | 11-14 jan '11 | 12-15 jul '11 |
| second lead author meeting (LA2) | 18-22 jul '11 | 12-15 dec '11 | 19-23 mar '12 |
| expert review of the first order draft (FOD) | 16 dec '11-10 feb '12 | 11 jun-6 aug '12 | 22 jun-20 aug '12 |
| third lead author meeting (LA3) | 16-20 apr '12 | 22-26 oct '12 | 5-9 nov '12 |
| experts and governments review second order draft (SOD) and summary for policy makers (SPM) | 5 oct-30 nov '12 | 29 mar-24 may '13 | 26 apr-24 jun '13 |
| forth lead author meeting (LA4) | 14-19 jan '13 | 15-19 jul '13 | 2-6 sep '13 |
| final government review of the SPM | 7 jun-2 aug '13 | 28 oct-20 dec '13 | 13 dec '13-10 feb '14 |
| governments approve SPM and accept report during plenary meetings | 23-26 '13 | 17-21 mar '14 | 7-11 apr'14 |
| publishment of the working group reports | early '14 | mid '14 | late '14 |
| event | when |
| experts & governments prepare scoping document | aug ‘10 |
| governments approve scoping document | oct ‘10 |
| IPCC bureau selects core team | mar ‘12 |
| first lead author meeting | mid ‘12 |
| second lead author meeting | mid ‘13 |
| third lead author meeting | jan ‘14 |
| third bis lead author meeting | apr ‘14 |
| expert and government review | may-jun ‘14 |
| forth lead author meeting | jul ‘14 |
| final government review | aug ‘14 |
| governments approve SPM and adopt report | oct ‘14 |
| publishment of the Synthesis Report | Anfang ‘15 |
IPCC-Berichte beruhen soweit möglich auf begutachteter Literatur, die in Fachzeitschriften veröffentlicht ist. Die Studien müssen zu bestimmten Fristen zumindest bei einer Zeitschrift eingereicht oder zur publishment akzeptiert sein, damit sie in AR5 berücksichtigt werden können. Diese Fristen fallen im Allgemeinen mit der Fertigstellung des Zweiten draf zusammen and es gelten voraussichtlich folgende Daten:
| WGI | WGII | WGIII | |
| submitted by | 31 jul 2012 | 31 jan 2013 | 11 mar 2013 |
| accepted by | 11 mar 2013 | 31 aug 2013 | 28 oct 2013 |
| Renewable Energy Sources and Climate Change Mitigation (SRREN) | may 2011 |
| Managing the Risks of Extreme Events and Disasters to Advance Climate Change Adaptation (SREX) | november 2011 |