Région III: Amérique du Sud

La Région III de l'OMM comprend 13 Membres, qui relèvent du Bureau régional de l'OMM pour les Amériques. Son vaste territoire présente des paysages et des hauts plateaux variés, allant des forêts tropicales luxuriantes de l'Amazonie aux glaciers de la pointe sud du continent, et des estuaires de La Plata et de l'Amazonie aux sommets enneigés des Andes. Cette diversité géographique se traduit par une riche biodiversité et de multiples conditions météorologiques et climatiques.

Les inondations et les sécheresses sont les deux principaux aléas qui augmentent la vulnérabilité de la Région et qui sont fortement liés à la variabilité du climat, en particulier à El Niño-oscillation australe. Elles sont exacerbées par le changement climatique. Les tempêtes violentes, les glissements de terrain et les feux de forêt ont également un impact significatif sur la Région, d'autant plus que le nord de l'Argentine, le sud du Brésil et le Paraguay sont dans la zone du monde où la foudre est la plus fréquente.  

Pour relever les défis imposés par le changement climatique et les contraintes environnementales locales, entre autres, le Bureau régional de l'OMM pour les Amériques collabore activement avec la Commission économique des Nations Unies pour l'Amérique latine et les Caraïbes (CEPALC), l'Institut interaméricain de recherches sur les changements à l'échelle du globe (IAI), l'Organisation des États américains (OEA) et l'Institut national de recherche spatiale (INPE) du Brésil. L'accent est également mis sur la contribution aux objectifs de développement durable des Nations Unies par le biais de coalitions thématiques avec le Bureau des Nations Unies pour la prévention des catastrophes (UNDRR), le Programme des Nations Unies pour l'environnement (PNUE) et l'Organisation des Nations Unies pour l'alimentation et l'agriculture (FAO). 

Sur le plan socio-économique, la Région III comprend principalement des économies en développement, avec quelques pays en développement enclavés qui ont en moyenne un revenu intermédiaire supérieur, tandis que l'indice de développement humain varie de moyen à très élevé dans des pays comme l'Uruguay, le Chili et l'Argentine. 

Ongoing projects in the region

WMO Technical Advisory under AIM for Scale

Climate change is increasingly affecting agriculture across the globe, especially in low- and middle-income countries (LMICs), where smallholder farmers face growing uncertainty from erratic rainfall, rising temperatures, and extreme weather events. These challenges threaten food security, livelihoods, and national economies.To address these pressing issues, the Agriculture Innovation Mechanism for Scale (AIM for Scale) was launched as a bold initiative to bring evidence-based agricultural innovations to scale—starting with weather services.  WMO is involved in the AIM for Scale Programme Weather Package as a technical advisory partner supported by a grant from the International Affairs Office at the Presidential Court of the UAE. The initiative aims to scale climate services for farmers in countries across Africa, Asia, and South America. Current engagement includes Bangladesh, Chile, Ethiopia, Kenya, and Nigeria, with expansion to 30 countries planned by 2027.WMO supports the initiative through technical advisory on the following aspects: Country engagement through NMHSs and WMO Regional Training Centres, coordination to align the programme with WMO priorities and initiatives.,  the application of climate services in the agriculture sector through innovative co-production processes, enhanced capacity building and trainings for NMHSs and extension actors ; guiding in development of AI-focused weather and agrometeorology training with partners like the Mohamed bin Zayed University of Artificial Intelligence (MBZUAI), University of Chicago and WMO Members and regional centres.  As WMO Secretary-General Professor Celeste Saulo stated during COP29, " More and better data leads to better weather forecasts, early warning systems and climate information services for agriculture and other vital economic sectors. Closing basic data gaps will also help inform AI models.” Professor Saulo added that “the agriculture sector is undoubtedly one of the most vulnerable sectors to climate variability and change. Additional partnerships are needed to ensure that farmers are involved in the coproduction of weather and climate services which will enhance resilience and adaptation in the  agriculture sector.”  

ENANDES+. Building Regional Adaptive capacity and resilience to climate variability and change in vulnerable sectors in the Andes, a contribution to scaling up the ENANDES project

The presence and influence of the Andes, the most important mountain range in the Southern Hemisphere, creates a large variety of climatic and environmental conditions in the Andean countries of South America, not only in the mountainous zones but also in its slopes and surrounding areas. Andean countries share distinctive climate, environmental and cultural characteristics that have led the United Nations Framework Convention on Climate Change (UNFCCC) to recognize them as particularly vulnerable to climate change.ENANDES+ will support six of seven Andean countries in their climate adaptation and resilience efforts, scale up the ENANDES project, currently being implemented by WMO through the Adaptation Fund. With The Swiss Agency for Development and Cooperation (SDC)contribution adding Argentina, Bolivia and Ecuador to the three original ENANDES countries, Chile, Colombia and Peru. The project will also involve all WMO regional institutions in South America, including the Regional Climate Centres for South and West of South America, and the Regional Training Centres in Peru and Argentina.In Argentina and Bolivia, an early warning system for flash flood warnings in the binational area of the Pilcomayo River Basin will be developed, allowing for a unique transnational approach to improve climate resilience and adaptation in the region. In Ecuador, the National Meteorological and Hydrological Institute (INAMHI) will work in the upper Pastaza River basin to produce frost warnings for small-scale family farms, and hydrometeorological forecasts to support the management of hydroelectric power plants.  In Peru, the National Meteorological and Hydrological Service will work with MeteoSwiss and WMO regional centres to ensure technical knowledge is available and equally distributed amongst project stakeholders. 

Climate Science Information for Climate Action (CSICA)

Since October 2018, and in response to the Paris Agreement (Article 7, paragraph 7 (c)) WMO and Green Climate Fund (GCF) have partnered to provide the global community with access to new climate information, tools, and guidance to facilitate the generation and use of climate information in support of climate action decisions, recognizing the contribution and value of science-based decision-making in responding to climate change.  Some of the products developed by WMO include a methodology for Developing the Climate Science Information for Climate Action (WMO-No. 1287), data, tools and associated technical resources for enhancing the climate science basis for GCF-funded projects and activities, as well as for National Adaptation Plans (NAPs) and climate policies.  The aim of providing these products is to help all countries, in particular least developed countries (LDCs), small island developing states (SIDS) and developing countries to identify and select the most effective climate actions to address climate impacts. In doing so, the guidance can contribute to country-level decision-making and the mobilization of climate finance.The Climate Science Information for Climate Action (CSICA) initiative was officially launched in 2021 at the twenty-sixth Conference of Parties (COP 26) to the United Nations Framework Convention on Climate Change (UNFCCC) in Glasgow, Scotland. Furthermore, the GCF Board at its thirty-third Session in July 2022 adopted Decision 19 (GCF B.33/19) recognizing the results of the WMO-GCF collaboration and acknowledged the importance of scaling up the support for strengthening the capacity of all stakeholders to access, synthesize, and incorporate relevant climate science information into climate action policies, plans and investments, as well as enhancing the hydrological and meteorological systems and associated climate information services for low-carbon and climate-resilient development.Noting significant demand from countries, and high-level political support for this work, WMO is implementing the CSICA initiative through the provision of institutional coordination support, technical advisory services, capacity development and increased partnerships. 

Completed projects in the region

Bureaux de l'OMM dans la région

Bureau régional de l'OMM pour les Amériques

Avda. Mariscal López 1146, esq. 22 de Septiembre, 3er Piso, Edificio del Ministerio de Defensa Nacional, Asunción, Paraguay