Impacts of Nucleating Aerosol on Florida Storms. Part I: Mesoscale Simulations
Impacts of Nucleating Aerosol on Florida Storms. Part I: Mesoscale Simulations
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DOI：
10.1175/jas3713.1
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发表时间：
2006-07
影响因子：
3.1
通讯作者：
S. C. Heever;G. Carrió;W. Cotton;P. DeMott;A. Prenni
中科院分区：
文献类型：
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作者：
S. C. Heever;G. Carrió;W. Cotton;P. DeMott;A. Prenni
2002年7月举行的热带针状物和卷云层的卷云区域研究-佛罗里达地区卷云实验(晶面)野外活动接近尾声时，在佛罗里达半岛上空观测到了高浓度的撒哈拉沙尘，它们可以作为云凝结核(CCN)、巨型云凝结核(GCCN)和结冰核(IFN)。为了研究气溶胶浓度增加对对流风暴特征及其随后的砧座发展的影响，利用区域大气模拟系统(RAMS)模式进行了敏感性试验，其中CCN、GCCN和干扰素浓度的初始廓线是不同的。这些变化对风暴动力学和微物理过程以及地面降水都有显著影响。随着气溶胶浓度的增加，上升气流持续增强。砧板面积较小，但组织较好，凝析油掺混比最大值较大。
Abstract Toward the end of the Cirrus Regional Study of Tropical Anvils and Cirrus Layer–Florida Area Cirrus Experiment (CRYSTAL–FACE) field campaign held during July 2002, high concentrations of Saharan dust, which can serve as cloud condensation nuclei (CCN), giant CCN (GCCN), and ice-forming nuclei (IFN) were observed over the peninsula of Florida. To investigate the impacts of enhanced aerosol concentrations on the characteristics of convective storms and their subsequent anvil development, sensitivity tests are conducted using the Regional Atmospheric Modeling System (RAMS) model, in which the initialization profiles of CCN, GCCN, and IFN concentrations are varied. These variations are found to have significant effects on the storm dynamics and microphysical processes, as well as on the surface precipitation. Updrafts are consistently stronger as the aerosol concentrations are increased. The anvils cover a smaller area but are better organized and have larger condensate mixing ratio maxima in the cas...