Seasonal variation of the Hough modes of the diurnal component of ozone heating evaluated from Aura Microwave Limb Sounder observations
Seasonal variation of the Hough modes of the diurnal component of ozone heating evaluated from Aura Microwave Limb Sounder observations
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DOI：
10.1029/2009jd013179
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发表时间：
2010-05
影响因子：
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通讯作者：
Jiyao Xu;Anne K. Smith;G. Jiang;W. Yuan
中科院分区：
文献类型：
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作者：
Jiyao Xu;Anne K. Smith;G. Jiang;W. Yuan
[1]利用Aura微波临边探测仪2004年8月至2008年12月的全球大气臭氧分布资料，计算了臭氧日加热率。与光化学模式的比较表明，Strobel/Zhu参数化太阳加热率模式给出了10-70 km高度范围内太阳加热率的精确日循环。将Strobel/Zhu模式计算的加热分解为Hough模态，给出了各Hough模态的年（AO）、半年（SAO）和准两年（QBO）周期。结果表明，大部分O3加热进入对称的（1，−2），（1，1）和（1，−4）模式。最大传播模（1，1）和最大捕获模（1，−2）在47 km附近有明显的SAO特征，这里的加热幅度最大。臭氧加热对传播（1，1）模的强迫在二至点比二分点大。在（1，−2）和（1，1）模式中也有AO。在大加热率区域，两种模式的QBO特征都比较弱。最强传播模（1，1）的加热率在12月/1月至日附近达到最大值;最强捕获模（1，−2）的加热率在春分点附近达到最大值。最强的年变化发生在（1，−1）模态中;在12月/1月至日达到3.6 K/d。根据各Hough模态的季节变化，提出了一种新的加热率日分量的参数化方法，该方法覆盖了10 ~ 70 km的垂直范围。
[1] The global distribution of atmospheric ozone from August 2004 to December 2008 observed by Aura Microwave Limb Sounder is used to calculate the daily ozone heating rate. Comparison with a photochemical model shows that the Strobel/Zhu parameterized model of the solar heating rate gives an accurate diurnal cycle of the heating in the 10–70 km altitude range. The heating calculated using the Strobel/Zhu model is decomposed into Hough modes and the annual (AO), semiannual (SAO), and quasi-biennial (QBO) periodicities of each Hough mode are presented. The results show that the majority of the O3 heating goes into the symmetric (1,−2), (1,1), and (1,−4) modes. The largest propagating mode (1,1) and the largest trapped mode (1,−2) have obvious SAO signatures near 47 km, where the heating magnitude is largest. The forcing of the propagating (1,1) mode by ozone heating is larger during solstices than during equinoxes. There are also AO in the (1,−2) and (1,1) modes. The QBO signatures are relatively weak in the two modes in the region of large heating rate. The heating rate of the strongest propagating mode (1,1) reaches maximum near December/January solstice; that for the strongest trapped mode (1,−2) reaches maximum near equinoxes. The strongest annual variation takes place in the (1,−1) mode; it reaches 3.6 K/d near 45 km at the December/January solstice. A new parameterization of the diurnal component of the heating rate, which covers the vertical range from 10 km to 70 km, is developed based on the seasonal variations in each Hough mode.