Query	Response
[I]	"The good news is that they can now forecast an El Nino with some precision, and during El Nino years predict its effect on the world's weather months in advance. The conclusion was made by Song Jiaxi and his colleagues with the National Marine Environmental Forecasting Center in their annual marine disaster forecast report, which was released today. Despite causing anomaly of weather and climate, the El Nino event may help cut global warming by temporarily stemming the release of carbon dioxide from the Pacific Ocean, scientists suggested Thursday."
"climate change" [F]	"In general, a large proportion of infectious disease agents are very sensitive to slight changes in climate,said McMichael, who was not involved in the research. Conditions like El Nino might settle in almost permanently if global warming gets bad enough, making climate disruptions such as droughts or excessive winter rain essentially the norm, a computer study suggests."
[R]	"El Nino is a periodic warming of the water in the eastern Pacific Ocean, which shifts weather patterns arriving from that area and can affect the climate worldwide. Scientists cautioned that like its warm counterpart, El Nino, a La Nina condition will influence global climate and weather until it has completely subsided."
[R]	"WMO added that uncertainty over surface temperatures in the Atlantic and Indian Oceans, which contribute to changing rainfall over Africa and South America, makes an accurate forecast difficult. El Nino phenomenon, which comes at an interval of roughly four years, refers to abnormal temperature rises in tropical waters which normally leads to global anomalies in weather and climate."
"countries affected" [F]	"Diarrhea kills as many as 3 million children under the age of 5 worldwide every year and sickens millions more, mostly in developing countries. The phenomenon had been responsible for only 40 percent rainfall in the country in June, he said."
[R]	"When the present levels of the greenhouse gas carbon dioxide were doubled in the experiment, the number of El Ninos affecting Australia nearly doubled too, the scientist said. La Ninas, by contrast, reduce storms in California but stir up trouble in other parts of the country as well as in India and southeast Asia."
"la nina" [F]	"La Ninas sometimes occur between El Ninos. Will La Nina wane as El Nino lingers?" he said."
[R]	"La Nina and El Nino form the opposite ends of the same climatic cycle, with El Nino fueled by unusually warm water in the eastern Pacific and La Nina driven by cold. A La Nina can drop it nearly 8 degrees."
[R]	"If La Nina dissipates before it hits Los Angeles, the area could face a more typical wet winter. La Nina, Spanish for "little girl," is just the opposite, with the warm conditions of El Nino returning to the west."
"global warming" [F]	"The program said experiments on the relationship between increasing carbon dioxide levels and global warming being done at the Mauna Loa Observatory in Hawaii supported the Australian claims. Australian scientists have uncovered a link between global warming and the increasing frequency of the El Nino weather system, the Australian Broadcasting Corporation (ABC) reported tonight."
[R]	"Gerald Meehl of the National Center for Atmospheric Research in Boulder, Colo., agreed it will take more study to understand how global warming might affect El Nino. The potential effect of global warming on disease is controversial,said William Checkley of Baltimore-based Johns Hopkins, who led the study."
[R]	"The world was also warmer in that quiet El Nino period, further pointing to a possible relationship between El Nino and global warming. The computer simulation suggests that unrestrained global warming could set up the same kind of pattern in ocean surface temperatures, but as a more or less constant condition."
[R]	"The Four Corners TV program claimed scientific data were showing that a man-made permanent drought was in the offing as a result of global warming. El Nino is the name given to the unusual warming of waters in the Pacific Ocean that affects global wind and temperature patterns."
[R]	"The pool of unusually cool tropical water marked by low sea levels has shriveled and the equatorial Pacific is warming to normal temperatures, NASA's Jet Propulsion Laboratory said this week. El Nino is a natural phenomenon that involves a surface warming of the eastern and central Pacific Ocean around the equator."
[R]	"El Nino is the name given to the unusual warming of waters in the Pacific Ocean that affects wind and temperature patterns. BEIJING, May 18 (Xinhua) - Chinese oceanographers today expect climatic repercussions on global weather as El Nino is expected to come sometime this year or the next."
"oceans" [F]	"It is estimated that the equatorial Pacific Ocean is the source of 72 percent of the annual flux of carbon to the atmosphere from the equatorial oceans. Those conditions are warming in the eastern Pacific Ocean; shifting of precipitation from the western to the eastern Pacific; slowing of trade winds; and changes in sea level."
[R]	"The oceans exchange large amounts of carbon dioxide with the atmosphere each year. During August and September, ocean surface temperatures reached near-record levels in many sections of the equatorial Pacific."
[R]	"The most important of gas-releasing areas is the equatorial Pacific, where is also the home of El Nino, the quasi-biennial warming event in the surface waters of the eastern equatorial Pacific Ocean. Oklahoma's catastrophic tornadoes were influenced by La Nina, the weather phenomenon 5,000 miles west of the prairie in the Pacific Ocean, scientists say."
Table 9: A real session in System  $S_{2}$  on the topic "El Niño". [I] stands for 'initial summary', [F] stands for 'fre-text' and [R] stands for 'repeat last query'. The user's strategy here seems to be repeating a query until enough information is covered on the matter.