Not exact matches
Whereas most studies look to the last 150 years of instrumental data and compare it to projections for the next few centuries, we looked back 20,000 years using
recently collected carbon dioxide,
global temperature and
sea level data spanning the last
ice age.
The grim bottom line (for those emerging from
recently melted
ice caves): Bring carbon dioxide emissions under control within the next few years or face serious consequences, including rising
sea levels, reduced agricultural productivity and a
global economic downturn.
Global ice - sheets are melting at an increased rate; Arctic sea - ice is disappearing much faster than recently projected, and future sea - level rise is now expected to be much higher than previously forecast, according to a new global scientific synthesis prepared by some of the world's top climate scien
Global ice - sheets are melting at an increased rate; Arctic
sea -
ice is disappearing much faster than
recently projected, and future
sea - level rise is now expected to be much higher than previously forecast, according to a new
global scientific synthesis prepared by some of the world's top climate scien
global scientific synthesis prepared by some of the world's top climate scientists.
The report found that
global ice sheets are melting at an increased rate; Arctic
sea ice is thinning and melting much faster than
recently projected, and future
sea - level rise is now expected to be much higher than previously forecast.
Mike's work, like that of previous award winners, is diverse, and includes pioneering and highly cited work in time series analysis (an elegant use of Thomson's multitaper spectral analysis approach to detect spatiotemporal oscillations in the climate record and methods for smoothing temporal data), decadal climate variability (the term «Atlantic Multidecadal Oscillation» or «AMO» was coined by Mike in an interview with Science's Richard Kerr about a paper he had published with Tom Delworth of GFDL showing evidence in both climate model simulations and observational data for a 50 - 70 year oscillation in the climate system; significantly Mike also published work with Kerry Emanuel in 2006 showing that the AMO concept has been overstated as regards its role in 20th century tropical Atlantic SST changes, a finding
recently reaffirmed by a study published in Nature), in showing how changes in radiative forcing from volcanoes can affect ENSO, in examining the role of solar variations in explaining the pattern of the Medieval Climate Anomaly and Little
Ice Age, the relationship between the climate changes of past centuries and phenomena such as Atlantic tropical cyclones and
global sea level, and even a bit of work in atmospheric chemistry (an analysis of beryllium - 7 measurements).
Whereas the State of the Climate reports put together periodically by the NOAA National Climatic Data Center (most
recently the 2012 State of the Climate report) present
global - scale atmospheric, oceanic, and
sea ice data, the EPA report focuses on the U.S. and covers a wider range of environmental and societal variables.
IMO, the strongest argument for
sea ice decline over the last decade for being unusual and at least in part attributable to
global warming is this (from Polyakov et al.): The severity of present
ice loss can be highlighted by the breakup of
ice shelves at the northern coast of Ellesmere Island, which have been stable until
recently for at least several thousand years based on geological data.