Evaluating the lower-tropospheric COSMIC GPS radio occultation sounding quality over the Arctic

Yu, Xiao; Xie, Feiqin; Ao, Chi O.

doi:https://doi.org/10.5194/amt-11-2051-2018

Articles | Volume 11, issue 4

https://doi.org/10.5194/amt-11-2051-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Observing Atmosphere and Climate with Occultation Techniques...

https://doi.org/10.5194/amt-11-2051-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 11, issue 4

Research article

|

11 Apr 2018

Research article |

| 11 Apr 2018

Evaluating the lower-tropospheric COSMIC GPS radio occultation sounding quality over the Arctic

Xiao Yu, Feiqin Xie, and Chi O. Ao

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Final revised paper (published on 11 Apr 2018)
Preprint (discussion started on 04 Oct 2017)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC1: 'Referee comment on amt-2017-230 by Yu et al.', Anonymous Referee #1, 31 Oct 2017
- AC1: 'Response to the Anonymous Referee #1', Feiqin Xie, 19 Jan 2018
RC2: 'Comment on "Evaluating the Lower Tropospheric COSMIC GPS Radio Occultation Sounding Quality over the Arctic" by Yu et al.', Anonymous Referee #3, 31 Oct 2017
- AC2: 'Response to the Anonymous Referee #3', Feiqin Xie, 19 Jan 2018

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Feiqin Xie on behalf of the Authors (23 Jan 2018) Author's response Manuscript

ED: Publish subject to technical corrections (05 Feb 2018) by Andrea K. Steiner

AR by Feiqin Xie on behalf of the Authors (14 Feb 2018) Author's response Manuscript

Short summary

Atmospheric observations from GPS receiver satellites offer uniform spatial coverage over the Arctic. The GPS profiles sensing deep into the lowest 300 m of the atmosphere only reach 50–60 % in summer but over 70 % in other seasons. The profile uncertainty due to different data centers is within 0.07 % in refractivity, 0.72 K in temperature, and 0.05 g kg^-1 in humidity below 10 km. A systematic negative bias of 1 % in refractivity below 2 km is only seen in the summer due to moisture impact.