While the warming of northern hemisphere oceans almost stalled, the southern hemisphere oceans are heating up

Observations from Argo floats and satellite shows that the rate of global ocean warming during 2005-2015 is largely consistent with the climate simulations under the increasing greenhouse gas concentration. However, during that period, the southern hemisphere oceans have absorbed up to 98% of the net global ocean heat gain, while the warming of northern hemisphere... Continue Reading →

Future sea-ice loss slows down the subtropical Pacific shallow overturning cell and enhances the tropical warming

Under the high emission scenario for the future (RCP 8.5), a nearly ice-free Arctic Ocean (i.e., sea-ice extent less than 10-6 km2 for at least five consecutive years) in northern summer is likely before 2050. A decrease in Antarctic sea-ice extent is also expected during the 21st century, but at a slower rate with large uncertainty.... Continue Reading →

MJO-induced drying air across Central America may be a precursor to active weeks of U.S. tornadoes

The National Oceanic and Atmospheric Administration’s Storm Prediction Center (NOAA SPC) provides one- to eight-day severe weather forecast for the U.S. that includes tornado watch. To extend the current sever weather forecast beyond eight days to 2 - 4 weeks (i.e., subseasonal time scale), many studies have looked into the Madden-Julian Oscillation (MJO), a patch... Continue Reading →

Spatiotemporal diversity of Atlantic Niño and associated rainfall variability over West Africa and South America

A phenomenon known as Atlantic Niño is characterized by the appearance of warm sea surface temperature anomalies (SSTAs) in the eastern equatorial Atlantic in northern summer. When it attains its full strength, it increases rainfall and the frequency of extreme flooding over the West African countries bordering the Gulf of Guinea and in northeastern South... Continue Reading →

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