Preprints
https://doi.org/10.5194/egusphere-2022-565
https://doi.org/10.5194/egusphere-2022-565
 
19 Aug 2022
19 Aug 2022

Development of an automated pump efficiency measuring system for ozonesonde utilizing the airbag type flowmeter

Tatsumi Nakano1,a and Takashi Morofuji2 Tatsumi Nakano and Takashi Morofuji
  • 1Aerological Observatory, Japan Meteorological Agency, 1-2, Nagamine, Tsukuba-shi, Ibaraki 305-0052, Japan
  • 2Atmosphere and Ocean Department, Japan Meteorological Agency, 3-6-9, Toranomon, Minato-city, Tokyo 105-8431, Japan
  • acurrently at: Fukuoka Regional Headquarters, Japan Meteorological Agency, 1-2-36, Ohori, Chuo-ku, Fukuoka-shi, Fukuoka 810-0052, Japan

Abstract. We have developed a system to automatically measure the flow rate characteristics of the pump built in the ozonesonde, so called “pump efficiency”, under various pressure situations emulating upper air conditions. The system consists of a flow measurement unit that uses a polyethylene airbag, a pressure control unit that reproduces a low-pressure environment, and a control unit that integrates and controls these, and enables fully automatic measurement. The Japan Meteorological Agency (JMA) has been operationally measuring the pump efficiency of the Electrochemical Concentration Cell (ECC) ozonesondes using the system since 2009, and has accumulated a lot of measurement data. From the multiple measurements of the same ozonesonde pump for around eleven years, we confirmed the long-term stability of the system’s performance. The long-term measurement data also showed that the pump flow characteristics of ozonesondes differed among production lots. We evaluated the impacts of the variance in these characteristics on the observed ozone concentration data comparing with the reference ozone profiles, and found that the influences on total ozone estimation was about 4 % to the maximum, the standard deviation per lot was about 1 %, and the standard deviation among lots was about 0.6 %.

Tatsumi Nakano and Takashi Morofuji

Status: final response (author comments only)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on egusphere-2022-565', Anonymous Referee #1, 12 Sep 2022
    • AC1: 'Reply on RC1', Takashi Morofuji, 14 Sep 2022
  • RC2: 'Comment on egusphere-2022-565', Anonymous Referee #2, 16 Sep 2022
  • EC1: 'Comment on egusphere-2022-565', Roeland Van Malderen, 22 Sep 2022
  • RC3: 'Comment on egusphere-2022-565', Anonymous Referee #3, 29 Sep 2022

Tatsumi Nakano and Takashi Morofuji

Tatsumi Nakano and Takashi Morofuji

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Short summary
We have developed a system that can automatically measure the pump efficiency of the ECC type ozonesonde. Operational measurement for ten years by this system revealed that the efficiency fluctuates in each and slightly increases over time. Those can affect the estimation of total ozone amount by up to 4 %. This result indicates that it is necessary to understand the tendency of the pump correction factor of each ozonesonde in order to detect the actual atmospheric change with high accuracy.