Dr Longley has been monitoring air quality in Auckland, Wellington and Christchurch since Level 4 restrictions were implemented and says working from home did not only cut emissions but could also reduce health risks.
After almost six weeks of monitoring air quality during Level 3 and 4 lockdown restrictions, scientist Dr Ian Longley is now asking people to record where and when woodsmoke is affecting their health and lives.
NIWA air quality scientist Dr Ian Longley says nitrogen oxide is found in pollutants from vehicle exhausts.Dr Longley says reductions in levels of airborne particulate matter have been more modest—for example a 20 per cent drop in fine particles (PM2.5) at Takapuna during daylight hours.
Dr Longley said concentrations started rising last Tuesday and Wednesday and by Thursday they were three to four times higher than normal across Auckland, Northland, Waikato, Manawatu and Hawke’s Bay. In summer particulate matter levels in New Zealand towns and cities are typically 10-20 micrograms per cubic metre.