A new networkmonitoring system formeteorologicaldata collecting and sending is designed and implemented based onmetadata technique.To a greatextent, the system solved the problem ofmeteorologicaldata transfer from observation station to the provincial meteorological bureau, and to nationalmeteorological administration through amethod of automated real-timemonitoring. System fully took into account the various types ofmeteorologicaldata transmission characteristics (frequency ofobservation, transmission time limitations, file naming, etc. ) and provided awide range ofdata displaymode. In addition tomonitoring transmission time, transmission type, transmission station, timing diagrams, GISmap, the system also providedmultiple functions such as voice alarm forabnormaldata, SMS notification and transmission quality statistics and evaluation. Through trial operation in the actual operations, the system obtained a very good effectand greatly reduce the staff’sworkload. At the same time, the system’s stability, scalability and function features have been tested and are shown as an outstanding performance. The results of trial operation also showed that the system could meet currentmeteorological operation and provide a good interface for the future expansion.
We put forward a scheme of satellite communication and meteorological information transmission which fits to remote weather stations including high mountain stations. PES 5000(PERSONAL EARTH STATION) was used for satellite communication system(SCS) in the scheme, and 24-port switch and WIN2000 as router were used for LAN. On the base of it, we set up LOTUS server for transmitting information and developed a set of information transmission system, and meteorological data can be derived from China Meteorological Administration by it. The project fits to remote meteorological stations, and it has been successfully put into practice at Mazongshan weather station of Gansu province.
Based on C + + BUILDER 6. 0 software exploiting tool,the Sandstorm Information Collection and Transmission System was built. The system can carry out transmission of sandstorm data and other meteorological information at regular time or in handwork by the interface with flexible parameter settings under windows operation system. The software compiling of second transmission of information under SCO UNIX operation system was finished,it can transmit sandstorm data and other information from provincial meteorological bureau to Chinese Meteorological Administration(CMA),especially it can transmit long - name files,which resolved the problem in 9210 Operation Applying Software(national meteorological information transmission software in China)
In this paper,.the spatial and temporal characteristics of drought in China are the analyzed. On the basis of the main factors of the influence of China climate anomaly .the causes of drought are also studied. It is shown that the causes of formation are mostly the global and regional climate warming .the inter一annual and decadal oscillation of the main factors.