Curiously cool summers in US Midwest linked to crop irrigation

Large components of the US Midwest have seen common temperatures cool barely because the Fifties, due partially to farmers rising extra crops and pumping extra water for irrigation. But local weather change could finally overwhelm this “warming hole”, with implications for crop yields in one of many world’s main breadbaskets.

For many years, local weather researchers have puzzled over anomalously cool temperatures seen within the US Midwest and Southeast because the late Fifties. Average temperatures within the area noticed a small decline, at the same time as world …