Seasonal variation and physical properties of the cloud system over southeastern China derived from CloudSat products
Seasonal variation and physical properties of the cloud system over southeastern China derived from CloudSat products
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CloudSat产品衍生的中国东南部云系统的季节变化和物理特性
DOI：
10.1007/s00376-014-4070-y
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发表时间：
2015-03
影响因子：
5.8
通讯作者：
Zhou Tianjun
中科院分区：
文献类型：
--
作者：
Guo Zhun;Zhou Tianjun
利用美国国家环境预报中心（NCEP）和中国气候预测中心（CPC）的降水合并分析（CMAP）资料和CloudSat产品，研究了中国东南部地区云的性质、垂直出现频率和云的冰水含量的季节变化。在CloudSat资料中，观测到中国东南部地区从冬到夏有明显的高低云交替。结果表明，东亚夏季风环流及其水汽输送导致了一种条件不稳定，有利于夏季局地上升运动，从而导致高空云量增加。深对流云中心与东亚夏季风的北移过程吻合较好，而卷云则略滞后于对流中心，与东亚夏季风的外流和纬向风辐散吻合较好。对辐射加热率的分析表明，夏季充足的水分和较高的云层都有效地破坏了大气的稳定。此外，云加热对流层中部，云辐射加热通过上升运动的绝热冷却来平衡，这通过Sverdrup平衡产生对流风。云加热强迫环流与东亚夏季风环流相吻合，对东亚夏季风环流有积极影响。
Based on the National Centers for Environmental Prediction (NCEP) and Climate Prediction Center (CPC) Merged Analysis of Precipitation (CMAP) data and CloudSat products, the seasonal variations of the cloud properties, vertical occurrence frequency, and ice water content of clouds over southeastern China were investigated in this study. In the CloudSat data, a significant alternation in high or low cloud patterns was observed from winter to summer over southeastern China. It was found that the East Asian Summer Monsoon (EASM) circulation and its transport of moisture leads to a conditional instability, which benefits the local upward motion in summer, and thereby results in an increased amount of high cloud. The deep convective cloud centers were found to coincide well with the northward march of the EASM, while cirrus lagged slightly behind the convection center and coincided well with the outflow and meridional wind divergence of the EASM. Analysis of the radiative heating rates revealed that both the plentiful summer moisture and higher clouds are effective in destabilizing the atmosphere. Moreover, clouds heat the mid-troposphere and the cloud radiative heating is balanced by adiabatic cooling through upward motion, which causes meridional wind by the Sverdrup balance. The cloud heating-forced circulation was observed to coincide well with the EASM circulation, serving as a positive effect on EASM circulation.
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影响因子：
4.6
作者：
Tianjun Zhou;Z.-X. Li
通讯作者：
Tianjun Zhou;Z.-X. Li
影响因子：
8
作者：
K. Sassen
通讯作者：
K. Sassen
影响因子：
8
作者：
G. Stephens;D. Vane;R. Boain;G. Mace;K. Sassen;Zhien Wang;A. Illingworth;E. O'connor;W. Rossow
通讯作者：
G. Stephens;D. Vane;R. Boain;G. Mace;K. Sassen;Zhien Wang;A. Illingworth;E. O'connor;W. Rossow
DOI：
10.1175/1520-0450(2001)040
发表时间：
2001-08
期刊：
Journal of Applied Meteorology
影响因子：
--
作者：
E. Valor;V. Meneu;V. Caselles
通讯作者：
E. Valor;V. Meneu;V. Caselles
影响因子：
3.1
作者：
D. Waliser;K. Lau;Jae-Hoon Kim
通讯作者：
D. Waliser;K. Lau;Jae-Hoon Kim