Abstract
Results from recent tropospheric chemistry models1 predict the diurnally averaged hydroxyl concentration [OH] to be in the 4×105−2×106-molecules cm−3 range for cloud-free equinoctial conditions. This is in accord with various measurement attempts where OH of >2×106 molecules cm−3 has rarely been observed in the troposphere.2 It is, therefore, desirable that a new lidar system should be capable of making OH measurements down to ~1×105 molecules cm−3 with confidence.
© 1984 Optical Society of America
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