|Volume 59(2) – 2010
Climate services can reverse downward spiral
Climate services are a key to supporting Haiti’s effort to rebuild its country, after the devastating earthquake early this year.
35 seconds of devastation, decades of vulnerability
The earthquake that hit Haiti on 12 January 2010 was the strongest earthquake in 200 years. Measuring 7.0 on the Richter scale, it lasted 35 seconds. What emerged after that short time was a different country – transformed by a disaster of almost unprecedented scale and complexity.
Nearly a third of the population – some 3 million people – were affected. More than 230 000 lost their lives and another 300 000 were injured. The earthquake crippled Haiti’s capital and economic heart, Port-au-Prince, and destroyed hundreds of thousands of homes in the city and elsewhere. There were 1.3 million people who sought refuge in makeshift settlements in and around the capital, while half a million more sought refuge with family and friends in other parts of the country. Damage and economic losses from the earthquake are estimated to be US$ 7.9 billion – over 120 per cent of Haiti’s 2009 GDP.
It was not the power of the earthquake alone that killed so many Haitians, but the chronic poverty and vulnerability of the population as well. Haitian society has struggled throughout its history to plan for and manage frequent extremes in weather, particularly hurricanes and intense rainfall. While devastating, the earthquake has offered an opportunity not just to reconstruct, but to “re-found” the country, as its President has said.
Climate, linked to Haiti’s development challenges
Haiti’s semi-arid tropical climate, frequent hurricanes and mountainous terrain have combined with environmental degradation, political instability and extreme poverty. In this context, it is understandable that planning for climate risks has historically been weak.
Food security is an issue. About two thirds of Haitians work in agriculture – mainly subsistence farming – yet the sector only accounts for a third of GDP. Agriculture is acutely vulnerable to damage from frequent hurricanes, floods and landslides. The rough, mountainous terrain limits the land available for cultivation and irrigation. Local production provides just 45 per cent of Haiti’s food consumption. Dependence on food imports makes the country – especially its poorest citizens – highly vulnerable to increases in international food prices.
Deforestation and environmental degradation make things worse, increasing flooding and landslide risks and reduces soil cohesion, so that fertile farmland is lost to erosion. Only two per cent of Haiti’s original forest cover remains, as most has been cut for charcoal, timber and agriculture. More than 80 per cent of the country’s watersheds are critically or totally deforested. Approximately 1 600 hectares of agricultural land are lost to soil erosion each year. Infertile areas make up a quarter of all land under cultivation.
With 75 per cent of the population dependent on precarious rural employment, many Haitians have sought employment in urban areas, but there are no new jobs.
The poor often have no choice but to occupy the lowest valued land in disaster-prone areas such as riverbanks, unstable hillsides, flood plains, coastal areas and deforested lands. Poor quality housing is prevalent, and it is not constructed to withstand the impacts of natural hazards.
Feeling climate change
Haiti has a hot and humid tropical climate. Rainfall occurs throughout the year, with major rains in April to June and August to November. The average annual rainfall is 140 to 200 cm, unevenly distributed. On the path of tropical storms that originate in the Atlantic and Caribbean Sea, Haiti is hit by one tropical storm every 2-3 years on average and by a major hurricane every 6-7 years. Drought-prone areas are on the rise, due to environmental degradation and subsequent desertification.
Haiti is feeling the impact of climate change. The percentage of days with very warm temperatures has increased considerably since the 1950s, with the number of consecutive dry days decreasing and the number of heavy rainfall events increasing. Sea-level rise is expected to increase the risks of floods, storm surge, erosion and other coastal hazards, putting settlements and people at risk.
Climate services for recovery and development
Rebuilding Haiti does not – and cannot – mean returning to the situation that existed before the earthquake. To rebuild the country on new foundations will require addressing first the urgent humanitarian situation, and then sustaining the effort to restart and develop economic, governmental and social activity while reducing Haiti’s vulnerability to natural hazards.
Climate services are vital to this effort. Management of climate risks – and now the new risks presented by climate change – is not peripheral to Haiti’s development. Improved access to climate information is needed to guide recovery and development in disaster risk management, agriculture, natural resources management and infrastructure development.
Improved forecasting and early warning systems are vital. Observations, historical data and modelling studies for hurricanes, floods, rainfall, soil moisture and hill slope stability are essential to reduce disaster risks. Climate services are needed to support agriculture, in order to improve rural livelihoods and reduce food insecurity. Better water resource management is also key, focusing on rainwater absorption, soil retention in watersheds and protecting drinking water sources. Information about rainfall patterns and other climate variables are needed to guide river basin development projects, reforestation, soil conservation and other ecosystem management projects.
Climate services are critical for rebuilding devastated areas and constructing new settlements and development centres, as well as for supporting infrastructure such as ports, airports and energy facilities. Weather forecasts are needed for operating Haiti’s airports and ports, which are vital for the development of tourism and industry.
Towards stronger climate services
Responsibility for climate services is divided between the National Meteorological Centre (CNM) and the Service National des Resources en Eau (SNRE), the later operating the hydroclimatological network and related data management. Unfortunately, their relatively limited operational capacities were weakened further by the disaster. The capacity to access essential local data and produce forecasts, early warnings for hydrometeorological hazards and other services was severely constrained, compounded by unreliable telecommunications.
Since the earthquake, several countries and organizations have supported the Haitian national meteorological services, especially to prepare for the 2010 hurricane season. However, sustained capacity building efforts are required to improve national capabilities and strengthen regional links. For instance, Haiti would benefit greatly from being part of a regional cooperation framework, in order to leverage resources, expertise, data exchange and forecasting capabilities.
Training and long-term educational opportunities are needed for Haitian technical staff, forecasters and management. An example is the need to spend time in an advanced climate centre where research is undertaken the impact of climate change in the Caribbean. They also need adequate basic resources, including computers and communications facilities.
Access to local data from a modern, sustainable observing system is also very important. Water and rain measurement networks need to be upgraded, and an agroclimatological network established. Databases are needed to store current and historical observational data, and archives need to be digitised. Systems to forecast and spread weather and climate information require significant improvement.
Access to effective climate services is vital to Haiti’s recovery and long-term sustainable development. The Global Framework for Climate Services will provide a mechanism to sustain climate services in Haiti even when current international attention eventually decreases. It can bring experts together, prioritise actions, raise funds and coordinate spending. As it evolves, it may also provide technical help to carry out regional programmes, while leveraging regional networks and resource.