Estimates of the seasonal cycle of mass and ozone transport at high northern latitudes
Estimates of the seasonal cycle of mass and ozone transport at high northern latitudes
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北部高纬度地区质量和臭氧输送的季节周期估计
DOI：
10.1029/1999jd900329
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发表时间：
1999
影响因子：
--
通讯作者：
K. Rosenlof
中科院分区：
文献类型：
--
作者：
K. Rosenlof
质量和臭氧向北方高纬度地区的纬向平均输送呈现出明显的年周期。在夏季，下降流是在最低限度，水平的体积平流和涡旋通量的臭氧和质量是显着的。本文详细研究了夏季60° ~ 70° N纬圈58 ~ 67 hPa臭氧收支。研究区域的选择与1997年4月至9月在阿拉斯加州费尔班克斯进行的夏季北极地区臭氧损失的光化学实验相对应。结果发现，在运输的季节性循环是一个重要的贡献者，由此产生的季节性游行的臭氧在高纬度地区。在平流层低层高纬度地区的水平涡动对臭氧趋势的贡献被认为是大的和负的（减少臭氧）在夏季中后期，在那里它超过抵消增加臭氧的趋势，由于平流的剩余环流。在初夏，高纬度的空气质量似乎是相对孤立的，与现场的化学过程驱动臭氧的趋势。
Zonally averaged transport of mass and ozone into high northern latitudes exhibits a pronounced annual cycle. During summer, downwelling is at a minimum, and horizontal bulk advection and eddy fluxes of ozone and mass are found to be significant. This study examines in detail the ozone budget between 58 and 67 hPa in a meridional annulus ranging from 60° to 70° N during summer. The area of the study was chosen to correspond with the Photochemistry of Ozone Loss in the Arctic Region in Summer high-altitude aircraft experiment based in Fairbanks, Alaska, from April to September, 1997. It is found that the seasonal cycle in transport is an important contributor to the resultant seasonal march of ozone at high latitudes. The horizontal eddy contribution to the ozone tendency at high latitudes in the lower stratosphere is found to be large and negative (reducing ozone) during middle and late summer, where it more than offsets the increasing ozone tendency due to advection by the residual circulation. During early summer, the high-latitude air mass appears to be relatively isolated, with in situ chemical processes driving the ozone tendency.