The Global Health Observatory (GHO) serves as the World Health Organization's primary portal for accessing comprehensive health-related statistics across its 194 Member States. It offers open access to over 1,000 key indicators spanning critical areas such as mortality, the burden of diseases, health systems, environmental health, infectious and noncommunicable diseases, and health equity.The port...

Background: Continuous ambient air quality monitoring in Kenya has been limited, resulting in a sparse data base on the health impacts of air pollution for the country. Authors have operated a centrally located monitor in Nairobi for measuring fine particulate matter (PM2.5), the pollutant that has demonstrated impact on health. Here, authors describe the temporal levels and trends in PM2.5 d...

Earthdata Search is NASA’s map-based web portal for discovering, visualizing, and accessing Earth science data across the EOSDIS system. It enables efficient searches—over 1.8 billion observations—via spatial, temporal, and keyword filters, powered by the Common Metadata Repository and illustrated through GIBS map imagery. Users can preview datasets, then download or customize data using direct do...

Objectives: Authors evaluated studies that used the World Health Organization’s (WHO) AirQ and AirQ+ tools for air pollution (AP) health risk assessment (HRA) and provided best practice suggestions for future assessments.Methods: Authors performed a comprehensive review of studies using WHO’s AirQ and AirQ+ tools, searching several databases for relevant articles, reports, and theses from inceptio...

This presentation was delivered during the Early-Career Training on Air Pollution and Health organised in 2024 by ICIMOD, CAPHER-India, and the Health Effects Institute in Kathmandu, Nepal.It covers:Policy questions that Health Risk Assessment (HRA) of air pollution answersMeasures of risk in population (RR, PAF, number of attributed cases, YLL, DALY)Main elements of risk assessmentUncertainties a...

The Weather Research and Forecasting (WRF) Model is a state of the art mesoscale numerical weather prediction system designed for both atmospheric research and operational forecasting applications. It features two dynamical cores, a data assimilation system, and a software architecture supporting parallel computation and system extensibility. The model serves a wide range of meteorological applica...

Air pollution is an escalating issue in cities worldwide, with direct impacts on public health.While many numerical tools exist to address this problem, there is a growing need for practical, scalable, and accessible modeling training resources, particularly in low- and middle-income countries. This publication is specifically designed to support those training needs and empower city managers, reg...

This study was conducted to identify and quantify the sources of selected volatile organic compounds (VOCs) and fine particulate matter (PM2.5) by using a partially constrained source apportionment model suitable for multiple time resolution data. Hourly VOC, 12-h and 24-h PM2.5 speciation data were collected during three seasons in 2013. Eight factors were retrieved from the Positive Matrix Facto...

This technical support document (TSD) describes the air quality modeling performed to support the final Cross State Air Pollution Rule for the 2008 ozone National Ambient Air Quality Standards (NAAQS). In this document, air quality modeling is used to project ozone concentrations at individual monitoring sites to 2017 and to estimate state-by-state contributions to those 2017 concentrations. The p...

Efforts have been made to relate measured concentrations of airborne constituents to their origins for more than 50 years. During this time interval, there have been developments in the measurement technology to gather highly time-resolved, detailed chemical compositional data. Similarly, the improvements in computers have permitted a parallel development of data analysis tools that permit the ext...