Supplementary material to "Satellite ice extent, sea surface temperature, and atmospheric methane trends in the Barents and Kara Seas"

Abstract

Supplementary Material S1. Review of Airborne Arctic Methane measurements CH4 concentration profiles over the Arctic Ocean were measured on five flights during the HIAPER Pole-to-Pole Observations (HIPPO) campaign (Kort et al., 2012; Wofsy, 2011) and produced evidence of sea surface CH4 emissions from the northern Chukchi and Beaufort Seas in most profiles, up to 82°N. Enhanced concentrations near the sea surface were common over fractured floating ice in sample profiles collected on 2 Nov.