A Technique for Continuous Recording of the Total Rate of Ion Formation in the Atmosphere

Mochizuki, S.; Namiki, Yasuo; Kato, T.; Masuda, Sumio; Sekikawa, Toshio

doi:10.1007/978-3-642-85294-7_29

Cited by 1 publication

(2 citation statements)

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“…Ionization rates have recently been measured by (Dhanorkar and Kamra, 1994;Wilkening, 1985;Mochizuki et al, 1977;Hensen and van der Hage, 1994). Dhanorkar and Kamra (1994) have used a set of integral ion counters to measure the small ion concentration and the aerosol ion mobility distribution at a height of about 1 m above the ground at Pune, India.…”

Section: Introductionmentioning

confidence: 99%

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Ion production rate in a boreal forest based on ion, particle and radiation measurements

et al. 2004

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Abstract. In this study the ion production rates in a boreal forest were studied based on two different methods: 1) cluster ion and particle concentration measurements, 2) external radiation and radon concentration measurements. Both methods produced reasonable estimates for ion production rates. The average ion production rate calculated from aerosol particle size distribution and air ion mobility distribution measurements was 2.6 ion pairs cm −3 s −1 , and based on external radiation and radon measurements, 4.5 ion pairs cm −3 s −1 . The first method based on ion and particle measurements gave lower values for the ion production rates especially during the day. A possible reason for this is that particle measurements started only from 3 nm, so the sink of small ions during the nucleation events was underestimated. It may also be possible that the hygroscopic growth factors of aerosol particles were underestimated. Another reason for the discrepancy is the nucleation mechanism itself. If the ions are somehow present in the nucleation process, there could have been an additional ion sink during the nucleation days.

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Section: Introductionmentioning

confidence: 99%

“…The estimate for Carlsbad Caverns (230 m underground, surface elevation 1340 m) was 2300 ion pairs cm −3 s −1 . Mochizuki et al (1977) designed an ionization chamber for continuous monitoring of the ion formation rate in the atmosphere. Results for one day at two different levels (0.2 m and 1 m) were presented.…”

Section: Introductionmentioning

confidence: 99%