The 28th annual State of the Climate report was recently released highlighting that 2017 was the third-warmest year on record for the globe, behind 2016 and 2015. The new report confirmed that 2016 surpassed 2015 as the warmest year in 137 years of recordkeeping. Several climate indicators also set new records, including greenhouse gas concentrations, sea level rise, heat in the upper ocean, and Arctic sea ice extent.
The 2017 average global CO2 concentration was the highest measured in the modern 38-year global climate record and records created from ice-core samples dating back as far as 800,000 years. Sea level rise also hit a new high, about 3.0 inches higher than the 1993 average and rising globally, at an average rate of 1.2 inches per decade. Heat in the upper ocean hit a record high, reflecting the continued accumulation of thermal energy in the uppermost 2,300 feet of the global oceans. Arctic sea ice maximum extent (coverage) was the lowest in the 38-year record. Extreme precipitation was also recurring theme this past year.
ocean warms more steadily,
seas continue rise.
The State of the Climate in 2017 was recently published in a special edition of the Bulletin of the American Meteorological Society. This report is led by NOAA's National Centers for Environmental Information and is based on contributions from more than 500 scientists representing over 65 countries around the world. It is the most comprehensive annual summary of Earth’s climate and provides a detailed update on global climate indicators, notable extreme weather events and other environmental data collected from locations on land, water, ice, and in space.
Principal investigators from PMEL’s Carbon, Arctic and Large Scale Ocean Physics programs contributed to sections on the global ocean carbon cycle, ocean heat content and arctic air temperature. Dr. Greg Johnson served as the editor for the Global Oceans chapter for the third consecutive year.
PMEL in the News
At Log Boom Park in Kenmore, the view of Lake Washington on Tuesday was mostly lost in the haze. "You can really feel it, especially today," said Neli Popov, as she stayed in the shade. Nick Bond is quoted.
A sensitive underwater microphone captures the sounds of methane, a potent greenhouse gas, escaping into waters off the coast of Oregon. Using this sound, researchers can estimate the bubbles’ sizes. Bob Dziak and Tamara Baumberger are quoted.
Forecasters at Colorado State University say the approaching peak of the 2018 hurricane season will be relatively quiet in the Atlantic Basin. But a report released Wednesday by the National Oceanic and Atmospheric Administration pointed out a troubling trend that could have implications for...
Differences in the heat balance terms in the upper 700 m for the Southern Indian Ocean for two periods: P2 (1998–2015) minus P1 (1992–1998).
Red arrows: an increase in heat transport into the Southern Indian Ocean in P2 relative to P1; blue arrows: a decrease in heat transport into of the Southern Indian Ocean in P2 relative to P1. Units are 10-2 °C per year (approx. 0.02 petawatts of heat). Surface: heat exchanges across the air-sea interface; Bottom-700 m: heat exchanges across 700 m.
The first decade of the 21st century witnessed a slowdown in the rise of global surface atmospheric temperatures, referred to as the global warming hiatus. During this time, the tropical Pacific Ocean absorbed more heat from the atmosphere than in previous decades, associated with unusually strong trade winds and a cold phase of the Pacific Decadal Oscillation. However, there is no evidence that the tropical Pacific heat content increased during this time. Where did the excess heat go?... more