The pollen is released by the opening of the anther. The pollen is carried by some agent (wind, or some animal) to the receptive surface of the stigma of the same or another flower. This process is known as pollination. After successful pollination, the pollen grain (immature microgametophyte) completes its development by growing a "pollen tube" and the two male gametes move through the pollen tube to the ovule.
2011 Pacific typhoon season
The 2011 Pacific typhoon season was an event in which tropical cyclones formed in the Western Pacific Ocean. The season ran throughout 2011 with most tropical cycle agency storming between May and November. The scope of this article is limited to the Pacific Ocean to the north of the equator between 100th meridian east and the 180th meridian.
Within the Northwestern Pacific Ocean, there are two separate agencies who assign names to tropical cyclones. This can often result in a cyclone having two names. The Japan Meteorological Agency named a tropical cyclone if it was judged to have 10-minute sustained wind speeds of at least 65 km/h (40 mph) anywhere in the basin.
While the Philippine Atmospheric, Geophysical and Astronomical Services Administration assigned names to tropical cyclones which moved into or form as a tropical depression in their area of responsibility between 135°E and 115°E and between 5°N and 25°N even if the cyclone has had a name assigned to it by the Japan Meteorological Agency. Tropical depressions that were monitored by the United States' Joint Typhoon Warning Center were given a number with a "W" suffix. On average, 27 storms form in this basin every year.
During each season several national meteorological services and scientific agencies forecast how many tropical cyclones, tropical storms, and typhoons will form during a season and/or how many tropical cyclones will affect a particular country.
Since the 2000 Pacific typhoon season, the Guy Carpenter Asia-Pacific Climate Impact Centre (GCACIC), of the City University of Hong Kong (CityUHK), have issued forecasts of activity for each upcoming typhoon season. On May 4 and July 5, 2011, the GCACIC issued forecasts which predicted the amount of tropical cyclones, tropical storms and typhoons there would be during 2011 as well as for how many tropical cyclones will make landfall on China or pass within 100 km (60 mi) of the Korean Peninsula or Japan.
This season the GCACIC predicted in May that 31 tropical cyclones, 27 tropical storms, and 17 typhoons would either form or move into the northwestern Pacific this year. In their July forecast, the GCACIC lowered their prediction for the number of tropical storms developing into a typhoon by one which they blamed on the strength of the India-Burma trough. For Southern China the GCACIC predicted in May that seven tropical cyclones would make landfall, during the year compared to an average of five. They further predicted that five of the cyclones would make landfall on Southern China between May and August, while the other two would landfall between September and December. After two tropical cyclones had made landfall on Southern China during June, the July GCACIC forecast predicted that seven tropical cyclones would make landfall, during the main season between July and December. For the Korean Peninsular and Japan, the GCACIC predicted in May that six tropical cyclones would affect either Japan or the peninsular during the year compared to an average of four, and predicted that there would be an above average amount of landfalls on Japan. After three tropical cyclones affected the region in May and June, the GCACIC predicted that seven tropical cyclones would affect either the Korean Peninsular or Japan during the main part of the season.
Since the 2000 Pacific typhoon season, the Tropical Storm Risk Consortium (TSR) of University College London have issued forecasts of activity for each upcoming typhoon season. Forecasts on the number of tropical storms, typhoons and intense typhoons there would be during 2011 in the Western Pacific were released in March, May, July and August. In all of their forecasts this year, TSR predicted that the season would see activity close to the average with 28 tropical storms, 18 typhoons and 8 intense typhoons developing during the season.
On January 17, the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) reported that they were expecting between 20 and 22 tropical cyclones to pass through the Philippine area of responsibility during 2011. On March 23 the Hong Kong Observatory (HKO), reported that they had predicted that 6-9 tropical cyclones would affect Hong Kong during the season. On April 26, the Thai Meteorological Department predicted that 2 tropical storms would affect Thailand during 2011. They predicted that 1 would move through Vietnam and affect Upper Thailand, during August or September. While the second tropical storm was expected to move through Southern Thailand during October or November. On June 30, Taiwan's Central Weather Bureau predicted that the 2011 season would be near its normal climatic average of 25.7, and predicted that 22-26 tropical storms, would occur over the Western Pacific during 2011, with 3 to 5 of them affecting Taiwan.
On April 1, the Japan Meteorological Agency (JMA) and Joint Typhoon Warning Center (JTWC) began monitoring an area of low pressure associated with intermittent convection over the South China Sea, roughly 535 km (335 mi) east-southeast of Ho Chi Minh City, Vietnam. The former of these two agencies immediately declared the system a tropical depression, the first of the 2011 season. Following further development of the system, most notably convective banding around the low-level circulation center, the JTWC issued a Tropical Cyclone Formation Alert on the storm. Early on April 2, the agency followed through with this alert and designated the low as Tropical Depression 01W. However, within hours of this, the depression became devoid of convection as wind shear buffeted the system. This prevented the cyclone from intensifying beyond depression status as it remained nearly stationary. Failing to regain convection by April 3, the depression degenerated into a remnant low and the final advisory from the JTWC was issued. The JMA continued to monitor the system as a tropical depression for another day before issuing their last warning on the system.