Titled 'Climate Change Knows No Borders', the report looks at the impact of climate change on migration in South Asia; particularly in Bangladesh, India, Nepal and Sri Lanka, reports UNB.
It anticipates that droughts, heat waves, cyclones, rising sea levels, heavy rainfall, landslides and floods are all likely to be felt in the region more severely in future. By 2050, the report forecasts, climate change in Bangladesh will have brought about a 10% drop in rice production and a 30% fall in wheat production.
Although Bangladesh has a long history of seasonal migration - where rural people move to find work during the agricultural lean season - research suggests this is becoming more permanent as a result of climate-induced disasters.
Crop failure, rising sea levels and flooding can all damage infrastructure and erode income opportunities and alternative coping mechanisms. If these events happen repeatedly, people may eventually be forced to move to cities or abroad to find work, the study said.
The World Bank estimates that by the middle of this century, half of all Bengalis will live in urban centres. This will add more pressure on Dhaka, where about 40% of people live in slums.
Climate-induced displacement is rarely planned, which means that migrants can face extremely difficult conditions. The IPCC study found that forced displacement can have a significant negative impact on education, health, employment, income, assets, access to social amenities, and incidence of disease.
The hardest hit, experts say, will be the families most vulnerable to traffickers and others who prey upon the poorest of the poor.
The report was released ahead of the Global Forum on Migration and Development.