Changes in the metastability of the Southern Hemisphere 500-hPa circulation are examined using both cluster analysis techniques and split-flow blocking indices. The cluster methodology is a purely data-driven approach for parameterization whereby a multiscale approximation to nonstationary dynamical processes is achieved through optimal sequences of locally stationary fast vector autoregressive factor (VARX) processes and some slow (or persistent) hidden process switching between them. Comparison is made with blocking indices commonly used in weather forecasting and climate analysis to identify dynamically relevant metastable regimes in the 500-hPa circulation in both reanalysis and Atmospheric Model Intercomparison Project (AMIP) datasets. The analysis characterizes the metastable regime in both reanalysis and model datasets prior to 1978 as positive and negative phases of a hemispheric midlatitude blocking state with the southern annular mode (SAM) associated with a transition state. Post-1978, the SAM emerges as a true metastable state replacing the negative phase of the hemispheric blocking pattern. The hidden state frequency of occurrences exhibits strong trends. The blocking pattern dominates in the early 1980s, and then gradually decreases. There is a corresponding increase in the SAM frequency of occurrence. This trend is largely evident in the reanalysis summer and spring but was not evident in the AMIP dataset. Further comparison with the split-flow blocking indices reveals a superficial correspondence between the cluster hidden state frequency of occurrences and split-flow indices. Examination of composite states shows that the blocking indices capture splitting of the zonal flow whereas the cluster composites reflect coherent block formation. Differences in blocking climatologies from the respective methods are discussed.
Internet business is already a very mature industry, the electricity supplier in 2008 around the shop seems to have received a good income. A drop out of college after 80 young people, from three days to less than a single business, and ultimately achieved annual sales of more than 12 million.
is a "double eleven", a singles itself belongs to the festival, just be Ali and other electronic business platform to build into a national online shopping festival. There are a lot of people choose to join the electronic business platform, entrepreneurship open shop, today introduced the protagonist is a case of entrepreneurship through the network, the transformation of business ideas so that he finally got a success.
The boy in Sihong County of Jiangsu Province,
1988 was born in the year of the Chen from the game Indoorsman to Tmall big sellers, create unbelievable Taobao marketing record, 2013 Tmall sales amounted to 12 million 500 thousand yuan, Chen Chengkai is a down garment store, talking about his entrepreneurial experience, his tone is relaxed and also full of magic.
2007 after graduating from high school, because of family misfortune, in order to take care of her sister to reduce the burden on the family, Chen Cheng only half a year in the University, began to drop out of school to work in the mother’s clothing store opened in Xuyi.
2008 one day, Chen Cheng’s mother, uncle pan into the store, see him playing games, casually said: "your son so like playing games, how not to do Taobao?" It is this sentence, let Chen Cheng impressed, in the pan uncle left, his mind has been thinking of "Taobao" thing. Chen Cheng felt that his mother would one day be old, one day he would have to bear the burden of the family, so he began to think about the Internet to open the Taobao shop this thing. "Mom’s down jacket is my best source of supply, but I was also afraid of being cheated, so it took about two months to investigate and study." Chen Lin.
The success of
2008 September, Chen Cheng Taobao store officially opened. "Taobao and the store is not the same, I can not sell too expensive, only in the purchase price plus 30 yuan. But that’s it, waiting for three days without a single business." The first month, Chen Cheng Taobao store business can be described as bleak. Almost a week before a business, then better, but only two or three single day.