{"id":118730,"date":"2026-09-11T21:19:31","date_gmt":"2026-09-11T19:19:31","guid":{"rendered":"https:\/\/nilu.gnist.dev\/publikasjoner\/detection-of-ozone-recovery-in-the-arctic-from-ground-based-measurements\/"},"modified":"2026-09-11T21:19:31","modified_gmt":"2026-09-11T19:19:31","slug":"detection-of-ozone-recovery-in-the-arctic-from-ground-based-measurements","status":"publish","type":"nva_publication","link":"https:\/\/nilu.gnist.dev\/en\/publications\/detection-of-ozone-recovery-in-the-arctic-from-ground-based-measurements\/","title":{"rendered":"Detection of ozone recovery in the Arctic from ground-based measurements"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Contrary to the Antarctic, where ozone recovery has been observed for about a decade, the detection of positive ozone trends in the Arctic remains challenging due to higher natural variability of ozone in that region. Using a merging of long-term ozone data from Fourier transform infrared spectrometers, ozonesondes, and Dobson and Brewer spectrophotometers, we present regional long-term trends (2000\u20132024) for total, stratospheric and tropospheric ozone. First, ground-based measurements are cross-compared to two satellite data sets (MEGRIDOP and IASI-CDR). This enables the detection of drifts in ground-based data sets we further exclude from our study. We then use a representativeness study based on CAMS re-analysis data to define regions for which representative trends with reduced uncertainties are obtained by combining data sets from different instruments and stations. Annual and seasonal trends are calculated using a multiple linear regression technique involving a set of proxies that represent physical processes influencing the natural ozone variability. Annual trends indicate increasing total ozone over the Arctic, and are statistically significant over Canada and Reykjavik (+2.1\u2009% per decade) and North-West Europe (Harestua and Lerwick, +0.7\u2009% per decade). Ozone recovery is also observed over Canada in the mid-stratosphere (+2.0\u2009% per decade) and over the North Pole region (Canada and Ny-\u00c5lesund) in the upper stratosphere (+2.1\u2009% per decade to +3.8\u2009% per decade). By analyzing the sensitivity of the ozone trends to the proxies, we observe a slow down of the expected ozone recovery, especially in the lower stratosphere, due to stratospheric cooling (\u22120.6\u2009% per decade) and to the increase of volume of polar stratospheric clouds (\u22120.8\u2009% per decade).<\/p>\n","protected":false},"template":"","meta":{"_acf_changed":false,"_searchwp_excluded":"","_id":"","_status":"PUBLISHED","_sync_date":"2026-09-11 21:18:28","footnotes":""},"nva_tax_category":[1099],"class_list":["post-118730","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\/118730","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\/118730\/revisions"}],"wp:attachment":[{"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/media?parent=118730"}],"wp:term":[{"taxonomy":"nva_tax_category","embeddable":true,"href":"https:\/\/nilu.gnist.dev\/en\/wp-json\/wp\/v2\/nva_tax_category?post=118730"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}