# Inconsistent Results Between AR6 and User-Defined Regions?

**URL:** <https://forum.ecmwf.int/t/inconsistent-results-between-ar6-and-user-defined-regions/3317>\
**Category:** C3S - Datasets and Usage\
**Tags:** cmip6, climate\_projections\
**Created:** [17 July 2024 20:25 UTC](https://forum.ecmwf.int/t/inconsistent-results-between-ar6-and-user-defined-regions/3317 "2024-07-17T20:25:39Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Mark\_Trexler](https://forum.ecmwf.int/user_avatar/forum.ecmwf.int/mark_trexler/32/473_2.png) [@Mark\_Trexler](https://forum.ecmwf.int/u/Mark_Trexler)\
**Post date:** [17 July 2024 20:25 UTC](https://forum.ecmwf.int/t/inconsistent-results-between-ar6-and-user-defined-regions/3317/1 "2024-07-17T20:25:39Z")

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When I look at Arabian Peninsula and the Sahara as AR6 regions with CMIP-6, SSP 5-8.5, Change, Annual, for Days Over 40o C, I get big numbers - an increase of 50-80 days over 40o by 2100.

When I create a user-defined box within those regions, and even when I create a user-defined box that tracks the entire Arabian Peninsula, and specify exactly the same parameters, I get 8-10 days of change in Days Over 40o C. Am I doing something wrong in setting up a user-defined box? Seems pretty straightforward.