2008年-世界发展银行全球_Weather_and_Climate_Services_in_Europe_and_Central_Asia___A_Regional_Review_114页_4mb

Summary of Weather and Climate Services in Europe and Central Asia: A Regional Review

Core Content

This document provides an in-depth analysis of the role, challenges, and potential improvements of weather and climate services in Europe and Central Asia (ECA). It outlines the importance of these services across various sectors, the impact of climate change, and the economic benefits of modernizing national meteorological and hydrological services (NMHSs).

Main Sectors Benefiting from Weather Forecasting

Weather forecasting services in ECA play a crucial role in supporting multiple sectors:

• Agriculture: Weather forecasts help in planning planting and harvesting, managing irrigation, and reducing crop losses due to adverse weather.
• Disaster Management: Accurate forecasts are essential for early warning systems and emergency preparedness, particularly for extreme weather events.
• Water Resource Management: Forecasts aid in managing water supply, flood control, and drought mitigation.
• Aviation: Weather data is vital for flight safety, route planning, and cost recovery.
• Other Sectors: Includes energy, transportation, and public health.

Findings and Recommendations

• The document highlights the need for improved forecasting accuracy and timely delivery of weather information.
• Public-private partnerships (PPPs) are recommended to enhance service delivery and financial sustainability.
• There is a call for better integration of climate change adaptation strategies into national weather services.

Climate Risk in ECA

The region faces significant climate risks, including:

• Transboundary Weather Patterns: These include events like the Genoa Cyclone and the Siberian Anticyclone, which affect multiple countries.
• Extreme Weather: Events such as heavy precipitation, heatwaves, and cold snaps are increasing in frequency and intensity.
• Variable Weather: Unpredictable changes in temperature and precipitation pose challenges for planning and resource management.
• Climate Change: Projections indicate significant changes in temperature and precipitation over the coming decades.

Findings and Recommendations

• Climate change is expected to alter weather patterns, making it essential to adapt national and regional services.
• The document recommends the development of more robust and flexible forecasting models to address these changes.
• Emphasis is placed on the need for regional cooperation and the use of advanced models like the ECMWF (European Center for Medium-range Weather Forecasting).

National and Regional Capacity of ECA NMHSs

NMHSs in ECA face varying levels of infrastructure and capacity:

• Typical Steps in Operational Forecasting: Include data collection, model initialization, and forecast delivery.
• Components of an NMS: Cover observing systems, data processing, forecasting models, and communication networks.
• Priorities in NMHS Infrastructure: Focus on improving data collection, computational power, and model accuracy.
• Status of Selected NMHSs: Highlights the varying levels of development and the need for modernization in some countries.

Findings and Recommendations

• There are significant gaps in data collection and model resolution, particularly in less developed countries.
• The document emphasizes the importance of enhancing the capacity of NMHSs through investment in technology and training.
• Regional cooperation and knowledge sharing are recommended to improve overall service quality and efficiency.

Economic Benefits of NMHS Modernization

Modernizing NMHSs can yield substantial economic benefits:

• Objective and Scope: Assessments focus on quantifying the economic value of weather services and identifying cost-effective modernization programs.
• Approaches to Economic Assessment: Include cost-benefit analysis (CBA), willingness to pay (WTP), and scenario modeling.
• Results of Economic Assessment: Show that improved services can lead to significant savings in agriculture, disaster management, and other sectors.

Findings and Recommendations

• Economic assessments demonstrate the high value of accurate and timely weather information.
• Investment in modernization can lead to better resource allocation and risk mitigation.
• The document recommends prioritizing the development of local area models (LAMs) and integrating climate change projections into service planning.

Key Definitions

• Weather: The state of the atmosphere at a specific time and place.
• Climate: The average weather conditions, including extremes and trends.
• Climatology: The study of climate.
• Microclimate: Local climate influenced by topography and land cover.
• Models and Initial Conditions: Numerical weather prediction models use initial conditions to forecast future weather states.
• Grid Spacing and Resolution: Global models have grid spacing of 25–100 km, while local models can have resolutions down to 1 km.
• Ensemble Forecasting: Uses multiple model runs to assess the probability of different weather outcomes.
• Teleconnections: Links between weather patterns in distant regions, such as El Niño/La Niña.
• Aerosols: Suspended particles that influence weather through precipitation and temperature effects.
• Observing Networks: Essential for capturing weather dynamics and providing accurate forecasts.

Conclusion

The report underscores the critical role of weather and climate services in supporting economic development and disaster resilience in Europe and Central Asia. It highlights the need for modernization, regional cooperation, and the integration of climate change projections into service delivery. By improving forecasting accuracy and expanding the scope of services, NMHSs can better meet the needs of various sectors and contribute to sustainable development.