Middle atmosphere response to different descriptions of the 11-yr solar cycle in spectral irradiance in a chemistry-climate model
Middle atmosphere response to different descriptions of the 11-yr solar cycle in spectral irradiance in a chemistry-climate model
复制标题
化学气候模型中光谱辐照度对 11 年太阳周期不同描述的中层大气响应
DOI：
10.5194/acp-12-5937-2012
复制
发表时间：
2012
影响因子：
6.3
通讯作者：
C. Jackman
中科院分区：
文献类型：
--
作者：
W. Swartz;R. Stolarski;L. Oman;E. Fleming;C. Jackman
抽象。从太阳辐射与气候实验（SORCE）的测量结果推断，太阳光谱辐照度（SSI）的11年太阳周期表明紫外线的变化比以前接受的要大得多。我们使用戈达德地球观测系统化学-气候模型（GEOSCCM）在SORCE SSI和无处不在的海军研究实验室（NRL）SSI重建中呈现中层大气臭氧和温度对太阳周期的响应。结果与最近的其他建模研究基本一致。使用NRL SSI模拟的臭氧响应在整个平流层和低层中间层都是积极的，而SORCE SSI产生的响应在低层平流层更大，但相对于45公里以上的太阳总辐照度是异相的。模拟的臭氧总量响应与卫星和地面测量结果相似，热带地区每100个单位的10.7厘米射电通量（F10.7）中有3-6个多布森单位。使用SORCE SSI的纬向平均热带温度响应的峰值比使用NRL SSI的模拟大10.7 - 3倍，接近2K/100单位F。GEOSCCM和戈达德航天飞行中心（GSFC）的二维耦合模式被用来研究如何SSI太阳循环影响大气通过直接的太阳加热和光解过程分别。中层大气臭氧几乎完全是通过光解作用受到影响的，而太阳的温度循环则是通过直接加热和光解反馈两种方式造成的，这两种过程基本上是线性可分的。这一点很重要，因为它意味着化学传输模型应该很好地模拟臭氧中的太阳循环，而没有耦合化学的大气环流模型将大大低估中层大气中对太阳循环的温度响应。此外，净臭氧响应的结果，从臭氧生产的平衡在波长小于242纳米和破坏在更长的波长，恰好对应的SOLAR恒星辐照度比较实验（SOLSTICE）和光谱辐照度监测器（SIM）的SORCE，分别波长制度。光谱响应的更高波长分辨率分析可以更好地预测大气对任意SSI变化的响应。
Abstract. The 11-yr solar cycle in solar spectral irradiance (SSI) inferred from measurements by the SOlar Radiation & Climate Experiment (SORCE) suggests a much larger variation in the ultraviolet than previously accepted. We present middle atmosphere ozone and temperature responses to the solar cycles in SORCE SSI and the ubiquitous Naval Research Laboratory (NRL) SSI reconstruction using the Goddard Earth Observing System chemistry-climate model (GEOSCCM). The results are largely consistent with other recent modeling studies. The modeled ozone response is positive throughout the stratosphere and lower mesosphere using the NRL SSI, while the SORCE SSI produces a response that is larger in the lower stratosphere but out of phase with respect to total solar irradiance above 45 km. The modeled responses in total ozone are similar to those derived from satellite and ground-based measurements, 3–6 Dobson Units per 100 units of 10.7-cm radio flux ( F 10.7 ) in the tropics. The peak zonal mean tropical temperature response using the SORCE SSI is nearly 2 K per 100 units F 10.7 – 3 times larger than the simulation using the NRL SSI. The GEOSCCM and the Goddard Space Flight Center (GSFC) 2-D coupled model are used to examine how the SSI solar cycle affects the atmosphere through direct solar heating and photolysis processes individually. Middle atmosphere ozone is affected almost entirely through photolysis, whereas the solar cycle in temperature is caused both through direct heating and photolysis feedbacks, processes that are mostly linearly separable. This is important in that it means that chemistry-transport models should simulate the solar cycle in ozone well, while general circulation models without coupled chemistry will underestimate the temperature response to the solar cycle significantly in the middle atmosphere. Further, the net ozone response results from the balance of ozone production at wavelengths less than 242 nm and destruction at longer wavelengths, coincidentally corresponding to the wavelength regimes of the SOLar STellar Irradiance Comparison Experiment (SOLSTICE) and Spectral Irradiance Monitor (SIM) on SORCE, respectively. A higher wavelength-resolution analysis of the spectral response could allow for a better prediction of the atmospheric response to arbitrary SSI variations.
影响因子：
18.3
作者：
Ineson, Sarah;Scaife, Adam A.;Haigh, Joanna D.
通讯作者：
Haigh, Joanna D.