 Webster and others published in 2005 an article in "Science" examining the "changes in tropical cyclone number, duration, and intensity" over the past 35 years, the period when satellite data has been available.Their main finding was although the number of cyclones decreased throughout the planet excluding the north Atlantic Ocean, there was a great increase in the number and proportion of very strong cyclones.Projections currently show no consensus on how climate change will affect the overall frequency of tropical cyclones.