Ozone and tracer transport variations in the summer northern hemisphere stratosphere
Ozone and tracer transport variations in the summer northern hemisphere stratosphere
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夏季北半球平流层的臭氧和示踪剂输送变化
DOI：
10.1029/2001jd900004
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发表时间：
2001
影响因子：
--
通讯作者：
S. R. Kawa
中科院分区：
文献类型：
--
作者：
E. Cordero;S. R. Kawa
利用高层大气研究卫星（UARS）的组成观测资料，结合剩余环流估算，研究北半球夏季HF、ch4和o3的输送和化学收支。对HF、ch4和o3的预算计算表明，夏季剩余环流引起的输送趋势幅度增大，与涡旋运动基本相反。臭氧收支分析表明，在100至31 hPa之间，夏季平均环流和涡旋输送项的量级增加，产生的趋势比观测到的平流层臭氧变化大2至3倍。化学损失只在高纬度地区，即向极地约70°N处主导观测到的臭氧减少。总臭氧测图光谱仪的观测结果与uars计算的总臭氧值的比较表明，在50°N的极地，夏季35%至55%的季节性臭氧减少发生在100 hPa以下的高度。总体的不确定性主要与剩余环流和涡旋输送的计算有关，相对较大，因此妨碍对平流层下层臭氧化学速率进行准确和有用的限制。
Constituent observations from the Upper Atmosphere Research Satellite (UARS) in combination with estimates of the residual circulation are used to examine the transport and chemical budgets of HF, CH 4 and O 3 in the summer Northern Hemisphere. Budget calculations of HF, CH 4 and O 3 show that the transport tendency due to the residual circulation increases in magnitude and is largely opposed by eddy motions through the summer months. Ozone budget analyses show that between 100 and 31 hPa, the magnitudes of the mean circulation and eddy transport terms increase through the summer months, producing tendencies that are factors of 2 to 3 times larger than the observed ozone change in the stratosphere. Chemical loss dominates the observed ozone decrease only at the highest latitudes, poleward of about 70°N. A comparison of observations from the Total Ozone Mapping Spectrometer with UARS-calculated total ozone suggests that poleward of 50°N, between 35% and 55% of the seasonal ozone decline during the summer occurs at altitudes below 100 hPa. The overall uncertainties, associated primarily with calculations of the residual circulation and eddy transport, are relatively large, and thus prevent accurate and useful constraints on the ozone chemical rate in the lower stratosphere.