Before revision:  Our autoregressive wild bootstrap approach  combined with a seasonal filter, is able to handle all issues mentioned above . We apply our methods to a set of atmospheric ethane series with a focus on the measurements obtained above the Jungfraujoch in the Swiss Alps. Ethane is the most abundant non-methane hydrocarbon in the Earth's atmosphere, an important precursor of tropospheric ozone and a good indicator of oil and gas production as well as transport. Its monitoring is therefore crucial for the characterization of air quality and of the transport of tropospheric pollution .
After revision:  Our autoregressive wild bootstrap approach combined with a seasonal filter, is able to handle all issues mentioned above .