# Speciation conversion for HTAP\_v3 emission

**URL:** <https://forum.cmascenter.org/t/speciation-conversion-for-htap-v3-emission/6088>\
**Category:** SMOKE\
**Created:** [December 2, 2025, 3:06pm UTC](https://forum.cmascenter.org/t/speciation-conversion-for-htap-v3-emission/6088 "2025-12-02T15:06:47Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![james.beidler](https://avatars.discourse-cdn.com/v4/letter/j/6f9a4e/32.png) [@james.beidler](https://forum.cmascenter.org/u/james.beidler)\
**Post date:** [December 3, 2025, 2:56pm UTC](https://forum.cmascenter.org/t/speciation-conversion-for-htap-v3-emission/6088/6 "2025-12-03T14:56:24Z")

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The CB05+CB06 HTAP profiles are linked in this solution from 2021. The current profiles are based on 2011 EMP sector-average profiles rather than the HTAP region-specific speciation (Huang et al. 2017).

> [@Hemispheric platform speciation](https://forum.cmascenter.org/t/hemispheric-platform-speciation/2576/4):
>
> There are some CB5 profiles with EPA’s 2011 platform: [https://gaftp.epa.gov/Air/emismod/2011/hemispheric/ge\_dat\_for\_2011\_hemi\_speciation.zip](https://gaftp.epa.gov/Air/emismod/2011/hemispheric/ge_dat_for_2011_hemi_speciation.zip) You can use the gsref from here. I’ve attached the GSPRO for CB6. We don’t have SAPRC at the moment but may at some point in the future. [gspro\_HTAP\_CB06\_from\_2011ei\_28apr2017\_v0.txt](https://forum.cmascenter.org/uploads/short-url/kQxbxCQ8h25hEWK7uvSh1QaXLkQ.txt) (17 KB)

The cross-reference numbering is described in the header as profile (1) aircraft, (2) ships, (3) energy, (4) industry, (5) transport, (6) residential, and (8) agriculture.

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