AS a foreigner anywhere, it is important to make an effort to experience the cultural heritage of the city you are in. In Paris you should visit Montmartre, in London you can＇t miss Buckingham Palace, and before you ...AS a foreigner anywhere, it is important to make an effort to experience the cultural heritage of the city you are in. In Paris you should visit Montmartre, in London you can＇t miss Buckingham Palace, and before you leave Sydney, a trip to the Blue Mountains is essential, For Beiiing, the unquestionable birthplace of Chinese culture is buried deep within the city＇s ancient hutongs.展开更多
[ Objective ] The study aimed to explore the release conditions for the conidia of Botryosphaena berengeriana and understand the release dynamic of conidia. [Method] The systematical survey on the release conditions f...[ Objective ] The study aimed to explore the release conditions for the conidia of Botryosphaena berengeriana and understand the release dynamic of conidia. [Method] The systematical survey on the release conditions for the conidia of B. berengeriana were conducted in two growing seasons in 2008 and 2009, combined with the collection of meteorological data around conidia release period, the weather conditions causing large amount release of B. berengedana were analyzed. [ Result] During a growing season, the conidia of pathogen appeared several large release peaks. Under the suitable temperature, when the precipitation lasted for 4 h, the conidia of B. berengeriana began to release with large amount, the amount of conidia reached the peak after release and trended to be stable during 4 - 12 h, which significantly reduced after 24 h, tended to dis- appear after 36 h, and completely disappeared after 72 h. [Conclusion] The dominant factor affecting B. berengeriana conidia release in large a- mount was precipitation, while the lasting time of precipitation played a decisive role.展开更多
Based on the analysis of persistent features of drought strength in NorthChina, a new technique to predict the drought strength with an integration of both the droughtytrend and the dynamic strong signal is proposed. ...Based on the analysis of persistent features of drought strength in NorthChina, a new technique to predict the drought strength with an integration of both the droughtytrend and the dynamic strong signal is proposed. Considering the prominent interdecadal andinterannual variations of drought strength, which can be separated by means of a nonlinear dynamicreconstruction, the two models with different time scale to predict droughty trend are establishedrespectively and integrated at last. In the course of model building, a concept of dynamic strongsignal is introduced, and the strong signal of observable difference between previous fields ofatmosphere and ocean and multi-year average values is introduced into the prediction model. It isindicated that the abnormal variations of atmosphere and ocean in the near future may influence thedrought. The extraseasonal hindcasts from 1996 to 2002 show that the prediction model represents thedroughty trend preferably and exhibits higher prediction skill.展开更多
文摘AS a foreigner anywhere, it is important to make an effort to experience the cultural heritage of the city you are in. In Paris you should visit Montmartre, in London you can＇t miss Buckingham Palace, and before you leave Sydney, a trip to the Blue Mountains is essential, For Beiiing, the unquestionable birthplace of Chinese culture is buried deep within the city＇s ancient hutongs.
基金Supported by State Apple Industry Technology System Project(nybcytx-08-04-01)~~
文摘[ Objective ] The study aimed to explore the release conditions for the conidia of Botryosphaena berengeriana and understand the release dynamic of conidia. [Method] The systematical survey on the release conditions for the conidia of B. berengeriana were conducted in two growing seasons in 2008 and 2009, combined with the collection of meteorological data around conidia release period, the weather conditions causing large amount release of B. berengedana were analyzed. [ Result] During a growing season, the conidia of pathogen appeared several large release peaks. Under the suitable temperature, when the precipitation lasted for 4 h, the conidia of B. berengeriana began to release with large amount, the amount of conidia reached the peak after release and trended to be stable during 4 - 12 h, which significantly reduced after 24 h, tended to dis- appear after 36 h, and completely disappeared after 72 h. [Conclusion] The dominant factor affecting B. berengeriana conidia release in large a- mount was precipitation, while the lasting time of precipitation played a decisive role.
基金This work is jointly supported by the President Foundation of Chinese Academy of Meteorological Sciences and the NationalNatural Science Foundation of China under Grant No. 40275020.
文摘Based on the analysis of persistent features of drought strength in NorthChina, a new technique to predict the drought strength with an integration of both the droughtytrend and the dynamic strong signal is proposed. Considering the prominent interdecadal andinterannual variations of drought strength, which can be separated by means of a nonlinear dynamicreconstruction, the two models with different time scale to predict droughty trend are establishedrespectively and integrated at last. In the course of model building, a concept of dynamic strongsignal is introduced, and the strong signal of observable difference between previous fields ofatmosphere and ocean and multi-year average values is introduced into the prediction model. It isindicated that the abnormal variations of atmosphere and ocean in the near future may influence thedrought. The extraseasonal hindcasts from 1996 to 2002 show that the prediction model represents thedroughty trend preferably and exhibits higher prediction skill.
