Sentences with phrase «heavy rainfall trends»

This makes heavy rainfall trends difficult to measure, because rain gauges are not always located where extreme rains occur.

Not exact matches

While the trends associated with climate change — hotter days, heavier rainfall and a greater number of extreme weather events — are present in the models, for many crops in Africa and Asia it's not clear how extensive the effects will be.

Given that studies of past climate patterns have found evidence of super-deluges in the Northeast, and that scientists have observed a century - long trend toward more rainfall coming in heavy downpours in the world's temperate zones (a pattern matching what's expected in a greenhouse - heated world), the logic in planning for the worst case in designing everything from a dam to a basement to a rural road is growing ever stronger.

Snowfall varies across the region, comprising less than 10 % of total precipitation in the south, to more than half in the north, with as much as two inches of water available in the snowpack at the beginning of spring melt in the northern reaches of the river basins.81 When this amount of snowmelt is combined with heavy rainfall, the resulting flooding can be widespread and catastrophic (see «Cedar Rapids: A Tale of Vulnerability and Response»).82 Historical observations indicate declines in the frequency of high magnitude snowfall years over much of the Midwest, 83 but an increase in lake effect snowfall.61 These divergent trends and their inverse relationships with air temperatures make overall projections of regional impacts of the associated snowmelt extremely difficult.