An evaluation of ice nuclei characteristics from the long-term measurement data over North China
An evaluation of ice nuclei characteristics from the long-term measurement data over North China
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DOI：
10.1007/s13143-012-0020-8
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发表时间：
2012-05
影响因子：
2.3
通讯作者：
Jinfang Yin;Donghai Wang;G. Zhai
中科院分区：
文献类型：
--
作者：
Jinfang Yin;Donghai Wang;G. Zhai
利用1963-2003年的地面观测资料，研究了华北地区冰核的特征。结果表明：（1）1963-1996年期间IN浓度呈上升趋势，2000年后IN浓度呈下降趋势;（2）在-15、-20、-25和-30 °C温度下，平均IN浓度范围为1.0至26.3、3.6至78.9、19.2至627.3和92.9至5285.0 L− 1，总体平均值为7.8，20.6、167.7和890.6 L-1;（3）活性IN的数浓度随温度的降低而呈指数增加，斜率为（范围从0.11至0.42°C-1）在对数线性坐标中具有窄范围;中西部和中东部的回归方程为N（T）= 0.0396exp（−0.317ΔT）和N（T）= 0.1496 exp（−0.299ΔT）。本文的研究结果对预报华北地区的云、降水和气候的模式有一定的参考价值。
An attempt was made to delineate the characteristics of ice nuclei (IN) over North China using the ground-based measurement data from 1963–2003. The results show that: (1) the IN concentrations increased during the period from 1963–1996, but decreased after 2000; (2) the average IN concentrations range from 1.0 to 26.3, 3.6 to 78.9, 19.2 to 627.3, and 92.9 to 5285.0 L−1at temperature −15, −20, −25, and −30°C, with the overall average of 7.8, 20.6, 167.7, and 890.6 L−1, respectively; and (3) the number concentration of active IN increased nearly exponentially with decreasing temperature, with the slope (ranging from 0.11 to 0.42°C−1) being of a narrow range in a log-linear coordinate; the regression equations for the western central China and the eastern central China can be expressed asN(T) = 0.0396 exp (−0.317ΔT) andN(T) = 0.1496 exp (−0.299ΔT), respectively. The present study may be useful toward applications in models for predicting IN effects on the cloud, precipitation and climate over North China.