Summertime low - ozone episodes at northern high latitudes

Summertime total ozone variations over middle and polar latitudes

[1] The statistical relationship between springtime and summertime ozone over middle and polar latitudes is analyzed using zonally averaged total ozone data. Shortterm variations in springtime midlatitude ozone demonstrate only a modest correlation with springtime polar ozone variations. However by early summer, ozone variations throughout the extratropics are highly correlated. Analysis of cor...

Summertime ozone at northern mid-latitudes

Seasonal persistence of northern low- and middle-latitude anomalies of ozone and other trace gases in the upper stratosphere

[1] Analysis of observed ozone profiles in Northern Hemisphere low and middle latitudes reveals the seasonal persistence of ozone anomalies in both the lower and upper stratosphere. Principal component analysis is used to detect that above 16 hPa the persistence is strongest in the latitude band 15–45 N, while below 16 hPa the strongest persistence is found over 45–60 N. In both cases, ozone an...

A Modeling Study of the Export Pathways of Pollution from Europe: Seasonal and Interannual Variations (1987-1997)

We present a study of the seasonal and interannual variations of the export pathways of pollution from Europe for eleven years, 1987-1997, using the GEOS-CHEM model of 3-d trace gas/aerosol chemistry and transport. The dominant export pathways in winter are advection to i. the middle and high latitudes of the North Atlantic Ocean, including the European Arctic; ii. Russia and the Russian Arctic...

Impact of 2050 climate change on North American wildfire: consequences for ozone air quality

We estimate future area burned in the Alaskan and Canadian forest by the mid-century (2046–2065) based on the simulated meteorology from 13 climate models under the A1B scenario. We develop ecoregion-dependent regressions using observed relationships between annual total area burned and a suite of meteorological variables and fire weather indices, and apply these regressions to the simulated me...