ARCTAS: The Arctic is a beacon of global change. It is where warming has been strongest over the past century, accelerating over the past decades. It is an atmospheric receptor of
pollution from the northern midlatitudes continents, as manifested in particular by thick
aerosol layers (“arctic haze”) and by accumulation of persistent pollutants such as mercury. >> View the entire ARCTAS White_Paper (2.6MB)

INTEX-B: The first phase (INTEX-A) was completed in the summer of 2004 and the second phase, INTEX-B field study, is to be performed during an approximate 8-week period from March 1 to April 30, 2006... >> View the entire INTEX-B White_Paper (1.0MB)

INTEX-NA is to be performed in two phases. Phase A will take place during the summer (July/August) of 2004 and Phase B during the spring (April/May) of 2006. Phase A is in summer when photochemistry is most intense and climatic issues involving aerosols and carbon cycle are most pressing, and Phase B is in spring when Asian transport to North America is at its peak. Several coastal and continental sites across North America have been selected as bases of operation. The experiment will involve scientists from the US, UK, Canada, Germany, and France, and will be supported by forecasts from meteorological and chemical models, satellite observations, surface networks, and enhanced O3-sonde releases.

TRACE-P, conducted in March/April 2001, had as it's major objectives to 1) determine the chemical composition of the Asian outflow over the western Pacific in spring in order to understand and quantify the export of chemically and radiatively important gases and aerosols, and their precursors, from the Asian continent and to 2) determine the chemical evolution of the Asian outflow over the western Pacific in spring and to understand the ensemble of processes that control the evolution.