Is a high‐altitude meteorological analysis necessary to simulate thermosphere‐stratosphere coupling?
Is a high‐altitude meteorological analysis necessary to simulate thermosphere‐stratosphere coupling?
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模拟热层-平流层耦合是否需要高空气象分析？
DOI：
10.1002/2015gl065838
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发表时间：
2015
影响因子：
5.2
通讯作者：
S. Bailey
中科院分区：
文献类型：
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作者：
D. Siskind;F. Sassi;C. Randall;V. Harvey;M. Hervig;S. Bailey
我们将2009年冬季和春季中层示踪剂下降的模拟与两个版本的全大气群落气候模型（WACCM）进行了比较，两个版本都具有特定的动态。一个是从0到50公里的现代研究和应用回顾性分析数据的约束;另一个是使用海军全球大气预报业务系统高级物理高海拔（NOGAPS-ALPHA），延伸到92公里。通过与太阳掩星冰实验数据的比较，我们表明，将WACCM限制为NOGAPS-ALPHA，在模拟增强的一氧化氮（NO）和非常低的甲烷（CH 4）的下降中产生了显着的改善。我们建议，约束到NOGAPS-ALPHA补偿了WACCM中非地形重力波阻力的低估。其他的可能性，如缺少高能粒子降水或低估涡流扩散，是不太可能的北极冬季和2009年春季。
We compare simulations of mesospheric tracer descent in the winter and spring of 2009 with two versions of the Whole Atmosphere Community Climate Model (WACCM), both with specified dynamics. One is constrained with data from the Modern‐Era Retrospective Analysis for Research and Applications which extends from 0 to 50 km; the other uses the Navy Operational Global Atmospheric Prediction System‐Advanced Level Physics High Altitude (NOGAPS‐ALPHA) which extends up to 92 km. By comparison with Solar Occultation for Ice Experiment data we show that constraining WACCM to NOGAPS‐ALPHA yields a dramatic improvement in the simulated descent of enhanced nitric oxide (NO) and very low methane (CH4). We suggest that constraining to NOGAPS‐ALPHA compensates for an underestimate of nonorographic gravity wave drag in WACCM. Other possibilities, such as missing energetic particle precipitation or underestimated eddy diffusion, are less likely for the Arctic winter and spring of 2009.