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Analysis on the Evolution of Dry and Wet Degree in benxi area in Recent 57 Years

Meteorological and Environmental Research 2010年第12期1卷 11-13页

作者：吉奇祝奎詹克荣吴英杰辽宁省本溪市气象局辽宁本溪117000

[Objective] The research aimed to analyze the evolution situation of dry and wet degree in benxi area in recent 57 years.[Method] By using the annual,quarterly and monthly temperature and precipitation data in benxi area during 1953-2009,the interdecadal variations of temperature,precipitation,dry and wet index were analyzed.[Result] The annual average temperature in benxi area displayed the obvious increase trend,and the linear trend rate was 0.29 ℃/10 *** the precipitation showed the obvious decrease trend,and the linear trend rate was-29.01 mm/10 *** dry and wet index showed the decrease trend,and the linear trend rate was-33.61 mm/10 a,which closely related to the rise of temperature and the decrease of precipitation after the 1980s.[Conclusion] It showed the warming-drying development trend in benxi area.

关键词： Temperature Precipitation Dry and wet index benxi area China

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Analysis on the Heavy Snow Weather Process in benxi area

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Meteorological and Environmental Research 2011年第1期2卷 24-27页

作者： KOU Si-cong CAO Wen benxi Meteorological Observatory Liaoning ProvinceBenxi 117000China Nanjing University of Information Science and Technology Nanjing 210044China

[Objective] The aim was to study the formation and development of a heavy snow in benxi area. [Method] Based on conventional meteorological data, the formation and development of a heavy snow in benxi area from December 4th to 5th in 2009 were analyzed from the aspects of weather situation evolution and physical quantity field feature. [Result] The heavy snow was caused by upper trough and North China cyclone. In this process, there was upper level divergence and lower level convergence over benxi area, and it was warm at low attitude and cold at high attitude; southwest jet at low attitude transported water vapor from Bohai Sea to eastern Liaoning, which provided good water vapor condition for snow, but it didn’t reach heavy snow due to inadequate ascending force. The development of Ural Mountains high ridge played an important role in the snow process and the strengthened high ridge moving northward was beneficial to the southward movement of cold air and deepening of upper trough. Analysis on physical quantity field could provide reference for predicting beginning and ending time and strength of heavy snow. [Conclusion] The study could provide basis for the forecast of heavy snow.

关键词： Heavy snow Weather situation Physical quantity Process analysis benxi area China

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Analysis on the Variation Characteristics of Temperature and Precipitation in benxi area under the Background of Climate Warming

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Meteorological and Environmental Research 2011年第7期2卷 12-14,18页

作者： LI Zhen,JI Qi benxi Meteorological Bureau in Liaoning Province,benxi 117000,China

[Objective] The research aimed to study the variation characteristics of temperature and precipitation in benxi area under the background of climate warming.[Method] Based on the monthly mean temperature and precipitation data of four routine meteorological stations in benxi area from 1953 to 2010,by using linear tendency rate,linear regression equation,wavelet analysis,Mann-Kendall detection and so on,the variation characteristics of temperature and precipitation under the background of climate warming in the area were analyzed.[Result] The annual average temperature during 1953-2010 in benxi area presented rise trend,and the linear tendency rate was 0.28 ℃/10 *** was temperature increase trend in four *** temperature rise rate in winter was the maximum and was the minimum in *** annual rainfall presented decrease trend,and the linear tendency rate was-18.16 mm/10 *** in spring,it was decrease trend in other ***-Kendall mutation detection showed that the mutation of annual average temperature in benxi area in recent 58 years appeared in *** was no mutation phenomenon in *** mutation appeared in 1974,and autumn mutation appeared in *** mutation was in *** annual and seasonal precipitation didn’t have the mutation *** wavelet analysis found that the annual average temperature had the periodic variations of 12-14,5-6 and 2 years in benxi area in recent 58 *** annual rainfall had the periodic fluctuations of 8-12,5-6 and 2 years.[Conclusion] The research provided the scientific basis for exploration and sustainable development of the climate resources in the mountain area.

关键词： Climate warming Temperature Precipitation Variation characteristic Trend analysis benxi area China

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Tidally Induced Water Temperature Change in Artesian Wells

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Earthquake Research in China 2011年第1期25卷 47-58页

作者： Ma Yuchuan Liu Yaowei Ren Hongwei Sun Xiaolong China Earthquake Networks Center China Earthquake Administration Beijing 100045 China Institute of Crustal Dynamics China Earthquake Administration Beijing 100085 China

Water temperature observation in wells,as a precursor observation project in China,aims to capture stress-strain information during the preparation of earthquakes. The study of the water temperature tidal effect has important significance,for water temperature tidal effect is both a reflection of stress-strain in crust and an interference factor of precursor observations. With a view of thermal conditions in artesian wells,the paper holds that there are two mechanisms for interpreting tidally induced water temperature changes in artesian wells. Namely,thermal conduction mechanisms and thermal convection mechanism. The paper then derives the quantitative relationship between water temperature and tidal volumetric strain changes in an ideal artesian well. Finally,the water temperature tidal effect in the benxi artesian well is analyzed. The results show that the water temperature tidal effect in benxi well is the result of joint action of thermal conduction mechanism and thermal convection mechanism,in which thermal conduction mechanism plays a leading role.

关键词： Artesian well Water temperature Earth tide Thermal conduction Thermal convection benxi area

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