The potential impacts of the current El Niño

The International Research Institute for Climate and Society has published two documents designed to walk policy makers through the potential impacts of current El Niño conditions. Readers can use the documents to not only assess how vulnerable different areas of the developing world are to climate-related socioeconomic impacts, but also to see how recent rainfall patterns in these areas have compared to typical El Niño conditions.

The IRI staff developed these documents in the context of the El Niño that has developed in the equatorial Pacific, which is likely to continue evolving until early 2010. El Niño conditions occur on average once every 3-5 years, and typically alter climate patterns in many regions of the world, leading to below-normal rainfall in some regions, and above-normal in other areas. Depending on socioeconomic conditions in the affected regions, these out-of-the-ordinary rainfall patterns can often lead to droughts, floods, wildfires, food insecurity and other impacts. (in previous stories, we tackled misconceptions about El Niño as well as its impacts on health.)

Current Rainfall Conditions and El Nino Teleconnections helps assess whether current rainfall conditions are consistent with anomalous--or abnormal--rainfall patterns typical of El Niño years, with a focus on developing countries. This information can help decision makers determine which areas have been hit hardest in recent months. The maps and graphs in this document were prepared using IRI's Data Library, a powerful and freely accessible repository of online data and analytical tools that allows users to view, manipulate and download more than 400 climate-related data sets through a standard web browser.

Overview of Current Socioeconomic and of Upcoming Seasonal Precipitation Odds provides maps that show the increase in odds that many developing countries have in receiving below-or above-normal rainfall in upcoming seasons, based on an analysis of past El Niño years. Importantly, the report also provides an overview of current socioeconomic conditions, such as dependence on agriculture, prevalence of malnutrition and political stability, for affected countries.

These documents are part of efforts by IRI researchers to inform policy making, mitigate negative impacts, and help make El Niño years less costly in terms of life and property. For a full set of El Niño related resources, please visit IRI's ENSO page.