Early warning system (EWS) is an important climate adaptation measure and support for the developing towards an ecological society. The Geneva Action Plan proposes to build EWS with ICT, and the United Nations Early Warnings for All Executive Action Plan calls for strengthening early warning dissemination and communication. The project focused on early warning production, dissemination and communication, and could effectively improve government’s ability of disaster prevention and reduce the loss and damage caused by disasters.
For early warning message production, the project established impact-based early warning models for heavy rain and snow in scenarios of roads, scenic areas, cities, and facility agriculture, which aimed to rapidly produce decision-supporting early warning message, that is accessible and understandable to the public. The project achievements were applied in the EWS of Dadu River Highway Bridge, and of Mount Huangshan as demonstrations.
For early warning message dissemination, 5G cell- broadcast (CB) technology and digital signatures (DS) technology were studied, cell broadcast center was developed. All these helped improve the speed, accuracy and security of early warning dissemination. The project achievements supported the formulation of relevant national policies, clarified the development path of the national early warning communication system.
Through the collaboration between communication sector and meteorology sector, the early warning messages are more aligned with specific actions for disaster response than before, and served vulnerable groups by save lives and reducing property losses. Now project's outcomes are being promoted to the national emergency EWS, can be rapidly applied in other scenarios and provide efficient services for other countries and regions.

https://www.caict.ac.cn/english/

• China

• Youth
• Older persons
• Women
• Indigenous and nomadic peoples
• People with disabilities
• The unemployed
• Migrants
• Remote and rural communities

Early warning models are important means of producing early warning message. This project focused on scenarios such as roads, cities, scenic areas, and facility agriculture, and established early warning models that correlated and coupled disaster weather, carriers, and risk aversion decisions. These models rapidly generated information specific to particular facilities, vehicles, and pedestrians, which saved more time for government and public to prepare for disaster and to take more targeted defensive and emergency measures. The models can be generalized and applied to regions with similar disasters, and can also guide the research of warning models of meteorological impact risk for other scenarios.
5G CB combined with DG technology can help deliver alert with a near real-time speed across the Public Land Mobile Network (PLMN), with high precision in geographic areas, and with high security off spam message. Technical standards, models, and systems can improve dissemination efficiency and promote the scientific development of early warning. In addition to natural disasters, they can also serve emergency management, water resources, maritime affairs, and health sectors in the case of accidents, public health incidents and social security incidents. They can be promoted to serve other countries and regions, protecting public life and property safety, reducing economic losses, and creating significant social benefits.

Early warning can effectively reduce the mortality rate and economic losses caused by disasters. Since 2019, we have completed a number of national key research and development plan projects, which continuously improving the national early warning production, dissemination and communication capabilities.
For early warning message production, models that integrate typical meteorological disasters (heavy rain, strong winds, ice and snow, lightning) and disaster prevention management and avoidance measures, have been established for roads, scenic areas, cities, and agriculture facility. In the future, we will iterate and improve the accuracy of the models, and will research rapid early warning models in fields such as public health, energy and power, in order to continuously expand early warning service areas and improve the speed and quality of early warning.
For early warning message dissemination, some kinds of early warning dissemination technologies have been studying. 5G CB technology was used to improve early warning efficiency, digital signatures technology was adopted to enhance information security, satellite broadcast was used to expand coverage, and a multi-channel integrated dissemination model was established to improve resource utilization. Under the guidance of the Ministry of Industry and Information Technology, we supported developing 14th Five-Year Plan of Emergency Communication, clarifying development paths and serving the construction of the national early warning system. At the same time, we are actively transforming the scientific achievements to promote the start-up of the nationwide 5G CB early warning project. In the future, we will expand channels to 6G and TianTong satellite communication system, to continuously improve the speed, accuracy, coverage, and security of early warning.

With the global climate changing, extreme weather events occur frequently and cause serious damage. Early warning aims to ensure that public at risk receive guidance messages before disasters, so it can save lives and reduce losses. This project effectively improved the production and release level of high impact weather warning information in China by establishing impact-based warning models. It also enhanced the speed, geographic accuracy and ensure the security of early warning dissemination by 5G CB combined with DS. In consequence, the response time to disaster for the public has been extended, disaster prevention and response measures have been clarified, and the threat of climate change has been reduced. The project fully considers vulnerable groups including the elderly, women, children, and disabilities, by ensuring alert is accessible and understandable. The project’s achievements supported key government decisions on emergency communications, and were exhibited in various activities such as the "13th Five-Year Plan" Science and Technology Innovation Achievement Exhibition, attracting wide attention. The project has driven the stakeholders including government sectors, academy, telecommunications carriers, and communication vendors, to work together to strengthen national EWS, through seminars, standard development, joint experiments, etc. In addition, we engaged in exchanges with international organizations to jointly promote the development of worldwide early warning. We joined expert groups of ET-GMAS and ET-EWS of WMO, and involved in the preparation of action plan. It has promoted the construction of the Global Multi-hazard Alert System-Asia (GMAS-A) to realize the access of early warning from 18 members of the WMO Region II (Asia), providing early warning for the public in Asia.