Implication of Negative Entropy Flow for Local Rainfall

Entropy

Ying Liu¹  Chongjian Liu¹ 

[1] State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing 100081, China; E-Mail:

关键词: entropy flow;    rainfall;    forecast;   

DOI  :  10.3390/e15093449

来源: mdpi

【 摘 要 】

The relation between the atmospheric entropy flow field and local rainfall is examined in terms of the theory of dissipative structures. In this paper, the entropy balance equation in a form suitable for describing the entropy budget of the Earth’s atmosphere is derived starting from the Gibbs relation, and, as examples, the entropy flows of the two severe weather events associated with the development of an extratropical cyclone and a tropical storm are calculated, respectively. The results show that negative entropy flow (NEF) has a significant effect on the precipitation intensity and scope with an apparent matching of the NEF’s pattern with the rainfall distribution revealed and, that the diagnosis of NEF is able to provide a good indicator for precipitation forecasting.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.