{"id":119357,"date":"2026-09-11T21:50:27","date_gmt":"2026-09-11T19:50:27","guid":{"rendered":"https:\/\/nilu.gnist.dev\/publikasjoner\/recent-advances-in-aerosol-optical-depth-measurements-in-polar-regions-insights-from-the-polar-aod-program\/"},"modified":"2026-09-11T21:50:27","modified_gmt":"2026-09-11T19:50:27","slug":"recent-advances-in-aerosol-optical-depth-measurements-in-polar-regions-insights-from-the-polar-aod-program","status":"publish","type":"nva_publication","link":"https:\/\/nilu.gnist.dev\/en\/publications\/recent-advances-in-aerosol-optical-depth-measurements-in-polar-regions-insights-from-the-polar-aod-program\/","title":{"rendered":"Recent advances in aerosol optical depth measurements in polar regions: insights from the Polar-AOD Program"},"content":{"rendered":"<p class=\"wp-block-paragraph\">A multi-year analysis of aerosol optical depth (AOD, \u03c4) and \u00c5ngstr\u00f6m exponent (\u03b1) was conducted using ground-based photometer data from 15 Arctic and 11 Antarctic sites. Extending the dataset of (Tomasi et\u00a0al.,\u00a02015) through December\u00a02024, the study incorporates stellar and lunar photometric observations to fill data gaps during the polar night. Daily mean values of \u03c4 at 0.500\u2009\u00b5m and \u03b1 (0.440\u20130.870\u2009\u00b5m) were used to derive monthly means and seasonal histograms. In the Arctic, persistent haze events in winter and early spring lead to peak \u03c4 values. A decreasing trend in Arctic \u03c4 suggests the impact of European emission regulations, while biomass-burning aerosols are becoming more significant. In Antarctica, \u03c4 increases from the plateau to the coast. Fine-mode aerosols dominate in summer-autumn, while coarse-mode particles are more prevalent in winter-spring. Shipborne photometer data align well with ground-based measurements, confirming the reliability of mobile observations. Trend analyses using the Mann-Kendall test and Theil-Sen regression indicate a significant negative trend in \u03c4 at Andenes (\u22122.43\u2009% per year), likely driven by reduced anthropogenic emissions. Antarctic stations such as Syowa and South Pole show positive trends (+3.84\u2009% and +3.54\u2009% per year), though these are subject to uncertainties from data limitations and instrument changes. This work contributes to the Polar-AOD network (https:\/\/polaraod.net\/, last access: 15\u00a0May\u00a02025), enhancing the understanding of aerosol variability and long-term trends in polar regions while promoting open data access for the scientific community.<\/p>\n","protected":false},"template":"","meta":{"_acf_changed":false,"_searchwp_excluded":"","_id":"","_status":"PUBLISHED","_sync_date":"2026-09-11 15:00:12","footnotes":""},"nva_tax_category":[1099],"class_list":["post-119357","nva_publication","type-nva_publication","status-publish","hentry","nva_tax_category-scientific-journal-publication"],"acf":[],"_links":{"self":[{"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/nva_publication\/119357","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/nva_publication"}],"about":[{"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/types\/nva_publication"}],"version-history":[{"count":0,"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/nva_publication\/119357\/revisions"}],"wp:attachment":[{"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/media?parent=119357"}],"wp:term":[{"taxonomy":"nva_tax_category","embeddable":true,"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/nva_tax_category?post=119357"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}