Open AccessLIDAR measurements of Arctic boundary layer ozone depletion events over the frozen Arctic Ocean
Author(s) -
Seabrook J. A.,
Whiteway J.,
Staebler R. M.,
Bottenheim J. W.,
Komguem L.,
Gray L. H.,
Barber D.,
Asplin M.
Publication year - 2011
Publication title -
journal of geophysical research: atmospheres
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2011jd016335
Subject(s) - mixing ratio , polar night , environmental science , atmospheric sciences , lidar , ozone , sunrise , boundary layer , ozone depletion , arctic , sea ice , sunset , atmosphere (unit) , climatology , geology , oceanography , meteorology , stratosphere , geography , physics , remote sensing , astronomy , thermodynamics
A differential absorption light detection and ranging instrument (Differential Absorption LIDAR or DIAL) was installed on‐board the Canadian Coast Guard Ship Amundsen and operated during the winter and spring of 2008. During this period the vessel was stationed in the Amundsen Gulf (71°N, 121–124°W), approximately 10–40 km off the south coast of Banks Island. The LIDAR was operated to obtain a continuous record of the vertical profile of ozone concentration in the lower atmosphere over the sea ice during the polar sunrise. The observations included several ozone depletion events (ODE's) within the atmospheric boundary layer. The strongest ODEs consisted of air with ozone mixing ratio less than 10 ppbv up to heights varying from 200 m to 600 m, and the increase to the background mixing ratio of about 35–40 ppbv occurred within about 200 m in the overlying air. All of the observed ODEs were connected to the ice surface. Back trajectory calculations indicated that the ODEs only occurred in air that had spent an extended period of time below a height of 500 m above the sea ice. Also, all the ODEs occurred in air with temperature below −25°C. Air not depleted in ozone was found to be associated with warmer air originating from above the surface layer.