Interannual variability of summertime formaldehyde (HCHO) vertical column density and its main drivers in northern high latitudes

Tianlang Zhao1, Jingqiu Mao2, Gonzalo Gonzalez Abad3 and William R Simpson2, (1)University of Alaska Fairbanks, Department of Chemistry and Biochemistry & Geophysical Institute, Fairbanks, AK, United States, (2)Department of Chemistry and Biochemistry and Geophysical Institute, University of Alaska, Fairbanks, Alaska, USA, Fairbanks, United States, (3)Center for Astrophysics | Harvard & Smithsonian, Cambridge, United States